The Experts below are selected from a list of 5238 Experts worldwide ranked by ideXlab platform
Ming Tian - One of the best experts on this subject based on the ideXlab platform.
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Surface Modification of As-Prepared Silver-Coated Silica Microspheres through Mussel-Inspired Functionalization and Its Application Properties in Silicone Rubber
Industrial & Engineering Chemistry Research, 2018Co-Authors: Wen Zhao, Runyuan Li, Ming Tian, Liqun Zhang, Wencai WangAbstract:A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO2/Ag) microspheres in silicone Rubber Matrix; at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO2/Ag surface by spontaneous polymerization of dopamine. The SEM images showed that the SiO2/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone Rubber. The PDA layers effectively improved the interfacial interaction between fillers and Rubber Matrix. The electrical resistivity of the SiO2/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO2/Ag/PDA in the Rubber Matrix, the composites exhibited a dramatic increase in tensile strength (47%) and maintained their low electrical resistivity of 8.3 × 10–3 Ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be...
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Surface Modification of As-Prepared Silver-Coated Silica Microspheres through Mussel-Inspired Functionalization and Its Application Properties in Silicone Rubber
Industrial and Engineering Chemistry Research, 2018Co-Authors: Mingzheng Hao, Runyuan Li, Hua Zou, Ming Tian, Wen Zhao, Wencai WangAbstract:Copyright © 2018 American Chemical Society. A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO2/Ag) microspheres in silicone Rubber Matrix, at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO2/Ag surface by spontaneously polymerization of dopamine. The SEM images showed that the SiO2/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone Rubber. The PDA layers effectively improved the interfacial interaction between fillers and Rubber Matrix. The electrical resistivity of the SiO2/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO2/Ag/PDA in the Rubber Matrix, the composites exhibited a dramatic increase in tensile strength (47%), and maintained their low electrical resistivity of 8.3×10-3 ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be extended to modify other particles to improve their compatibility in Matrix.
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surface modification of aramid fibers by catechol polyamine codeposition followed by silane grafting for enhanced interfacial adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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Surface Modification of Aramid Fibers by Catechol/Polyamine Codeposition Followed by Silane Grafting for Enhanced Interfacial Adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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improved adhesion properties of poly p phenyleneterephthamide fibers with a Rubber Matrix via uv initiated grafting modification
RSC Advances, 2015Co-Authors: Rina Sa, Wencai Wang, Lei Wang, Yuan Li, Liqun Zhang, Nanying Ning, Ming TianAbstract:In this research, ultraviolet (UV) irradiation induced graft polymerization of glycidyl methacrylate (GMA) was performed to modify the surface properties of poly-p-phenyleneterephthamide (PPTA) fibers. The improvement of adhesion with a Rubber Matrix was achieved due to the introduction of epoxy groups. The successful grafting of GMA on the PPTA fiber surface was ascertained by characterization using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). The tensile properties of PPTA fibers after each stage of surface modification were determined by tensile testing of single-filaments. A single-fiber pull-out test was applied to evaluate the adhesion of PPTA fibers with the Rubber Matrix. The pull-out force of grafted PPTA fibers exceeded that of the pristine fibers by 53.7%. Resorcinol–formaldehyde–latex (RFL) dipping was applied to further improve the adhesion properties. As a result, the fibers with GMA grafting followed by RFL dipping exhibited a 80.8% improvement compared with the pristine fibers and achieved much higher adhesion strength with Rubber Matrix, compared to the PPTA fibers modified with conventional industrial method of isocyanate (NCO) and RFL two bath dipping.
Wencai Wang - One of the best experts on this subject based on the ideXlab platform.
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Surface Modification of As-Prepared Silver-Coated Silica Microspheres through Mussel-Inspired Functionalization and Its Application Properties in Silicone Rubber
Industrial & Engineering Chemistry Research, 2018Co-Authors: Wen Zhao, Runyuan Li, Ming Tian, Liqun Zhang, Wencai WangAbstract:A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO2/Ag) microspheres in silicone Rubber Matrix; at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO2/Ag surface by spontaneous polymerization of dopamine. The SEM images showed that the SiO2/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone Rubber. The PDA layers effectively improved the interfacial interaction between fillers and Rubber Matrix. The electrical resistivity of the SiO2/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO2/Ag/PDA in the Rubber Matrix, the composites exhibited a dramatic increase in tensile strength (47%) and maintained their low electrical resistivity of 8.3 × 10–3 Ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be...
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Surface Modification of As-Prepared Silver-Coated Silica Microspheres through Mussel-Inspired Functionalization and Its Application Properties in Silicone Rubber
Industrial and Engineering Chemistry Research, 2018Co-Authors: Mingzheng Hao, Runyuan Li, Hua Zou, Ming Tian, Wen Zhao, Wencai WangAbstract:Copyright © 2018 American Chemical Society. A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO2/Ag) microspheres in silicone Rubber Matrix, at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO2/Ag surface by spontaneously polymerization of dopamine. The SEM images showed that the SiO2/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone Rubber. The PDA layers effectively improved the interfacial interaction between fillers and Rubber Matrix. The electrical resistivity of the SiO2/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO2/Ag/PDA in the Rubber Matrix, the composites exhibited a dramatic increase in tensile strength (47%), and maintained their low electrical resistivity of 8.3×10-3 ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be extended to modify other particles to improve their compatibility in Matrix.
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surface modification of aramid fibers by catechol polyamine codeposition followed by silane grafting for enhanced interfacial adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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Surface Modification of Aramid Fibers by Catechol/Polyamine Codeposition Followed by Silane Grafting for Enhanced Interfacial Adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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improved adhesion properties of poly p phenyleneterephthamide fibers with a Rubber Matrix via uv initiated grafting modification
RSC Advances, 2015Co-Authors: Rina Sa, Wencai Wang, Lei Wang, Yuan Li, Liqun Zhang, Nanying Ning, Ming TianAbstract:In this research, ultraviolet (UV) irradiation induced graft polymerization of glycidyl methacrylate (GMA) was performed to modify the surface properties of poly-p-phenyleneterephthamide (PPTA) fibers. The improvement of adhesion with a Rubber Matrix was achieved due to the introduction of epoxy groups. The successful grafting of GMA on the PPTA fiber surface was ascertained by characterization using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). The tensile properties of PPTA fibers after each stage of surface modification were determined by tensile testing of single-filaments. A single-fiber pull-out test was applied to evaluate the adhesion of PPTA fibers with the Rubber Matrix. The pull-out force of grafted PPTA fibers exceeded that of the pristine fibers by 53.7%. Resorcinol–formaldehyde–latex (RFL) dipping was applied to further improve the adhesion properties. As a result, the fibers with GMA grafting followed by RFL dipping exhibited a 80.8% improvement compared with the pristine fibers and achieved much higher adhesion strength with Rubber Matrix, compared to the PPTA fibers modified with conventional industrial method of isocyanate (NCO) and RFL two bath dipping.
Liqun Zhang - One of the best experts on this subject based on the ideXlab platform.
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Surface Modification of As-Prepared Silver-Coated Silica Microspheres through Mussel-Inspired Functionalization and Its Application Properties in Silicone Rubber
Industrial & Engineering Chemistry Research, 2018Co-Authors: Wen Zhao, Runyuan Li, Ming Tian, Liqun Zhang, Wencai WangAbstract:A mussel-inspired functionalization method was developed to improve the dispersibility and compatibility of silver-coated silica (SiO2/Ag) microspheres in silicone Rubber Matrix; at the same time, the high conductivity of the microspheres was maintained. The poly(dopamine) (PDA) layer was deposited on SiO2/Ag surface by spontaneous polymerization of dopamine. The SEM images showed that the SiO2/Ag/PDA microspheres are uniformly distributed and firmly integrated with silicone Rubber. The PDA layers effectively improved the interfacial interaction between fillers and Rubber Matrix. The electrical resistivity of the SiO2/Ag/PDA/MVQ composites can be well controlled by adjusting the dopamine deposition time. Due to the favorable dispersibility and compatibility of the SiO2/Ag/PDA in the Rubber Matrix, the composites exhibited a dramatic increase in tensile strength (47%) and maintained their low electrical resistivity of 8.3 × 10–3 Ω·cm in the meanwhile at dopamine deposition time of 8 h. This approach can be...
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surface modification of aramid fibers by catechol polyamine codeposition followed by silane grafting for enhanced interfacial adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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Surface Modification of Aramid Fibers by Catechol/Polyamine Codeposition Followed by Silane Grafting for Enhanced Interfacial Adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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improved adhesion properties of poly p phenyleneterephthamide fibers with a Rubber Matrix via uv initiated grafting modification
RSC Advances, 2015Co-Authors: Rina Sa, Wencai Wang, Lei Wang, Yuan Li, Liqun Zhang, Nanying Ning, Ming TianAbstract:In this research, ultraviolet (UV) irradiation induced graft polymerization of glycidyl methacrylate (GMA) was performed to modify the surface properties of poly-p-phenyleneterephthamide (PPTA) fibers. The improvement of adhesion with a Rubber Matrix was achieved due to the introduction of epoxy groups. The successful grafting of GMA on the PPTA fiber surface was ascertained by characterization using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). The tensile properties of PPTA fibers after each stage of surface modification were determined by tensile testing of single-filaments. A single-fiber pull-out test was applied to evaluate the adhesion of PPTA fibers with the Rubber Matrix. The pull-out force of grafted PPTA fibers exceeded that of the pristine fibers by 53.7%. Resorcinol–formaldehyde–latex (RFL) dipping was applied to further improve the adhesion properties. As a result, the fibers with GMA grafting followed by RFL dipping exhibited a 80.8% improvement compared with the pristine fibers and achieved much higher adhesion strength with Rubber Matrix, compared to the PPTA fibers modified with conventional industrial method of isocyanate (NCO) and RFL two bath dipping.
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In situ self-polymerization of unsaturated metal methacrylate and its dispersion mechanism in Rubber-based composites
Thermochimica Acta, 2013Co-Authors: Yao Zhou, Liqun Zhang, Tung W. Chan, Yongri LiangAbstract:Abstract Unsaturated metal methacrylate (UMM) as one kind of functional filler has played an important role in reinforcing Rubber materials. The in situ self-polymerization of UMM in UMM/Rubber composite leads to the uniform dispersion of poly(UMM) in the Rubber Matrix, while the crosslinking of Rubber and grafting between UMM and Rubber chains occur simultaneously, making it difficult to clarify the effect of the in situ polymerization on the dispersion of poly(UMM) in the Rubber Matrix. In this work, we investigated the dispersion mechanism of UMM without Rubber Matrix for the first time using differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. Three types of UMMs including zinc methacrylate (Zn(MA) 2 ), sodium methacrylate (Na(MA)) and samarium methacrylate (Sm(MA) 3 ) were chosen to investigate the in situ self-polymerization of UMM. Based on DSC results, we conclude that the crystals with low melting point tend to self-polymerize first and generate a large amount of heat in the presence of peroxide. The high heat of reaction can melt the crystals with high melting point, and more UMM molecules are dissolved in the Rubber Matrix, thus increasing the extent of the in situ polymerization. Hence, the UMM with low melting point can self-polymerize to a large extent. Our findings provide in-depth understanding of the dispersion mechanism of UMM in Rubber.
A S Luyt - One of the best experts on this subject based on the ideXlab platform.
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Physical–morphological and chemical changes leading to an increase in adhesion between plasma treated polyester fibres and a Rubber Matrix
Applied Surface Science, 2006Co-Authors: H Krump, I Hudec, M Jasso, E Dayss, A S LuytAbstract:Abstract The effects of plasma treatment, used to increase adhesion strength between poly(ethylene terephtalate) (PET) fibres and a Rubber Matrix, were investigated and compared. Morphological changes as a result of atmospheric plasma treatment were observed using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Wettability analysis using a surface energy evaluation system (SEE system) suggested that the plasma treated fibre was more wetting towards a polar liquid. When treated, these fibres showed a new lamellar crystallization, as shown by a new melting peak using differential scanning calorimetry (DSC). X-ray photoelectron spectroscopy (XPS) has been used to study the chemical effect of inert (argon), active and reactive (nitrogen and oxygen) microwave-plasma treatments of a PET surface. Reactive oxygen plasma treatment by a de-convolution method shows new chemical species that drastically alter the chemical reactivity of the PET surface. These studies have also shown that the surface population of chemical species formed after microwave-plasma treatment is dependent on the plasma gas. All these changes cause better adhesion strength of the PET fibres to the Rubber Matrix.
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physical morphological and chemical changes leading to an increase in adhesion between plasma treated polyester fibres and a Rubber Matrix
Applied Surface Science, 2006Co-Authors: H Krump, I Hudec, M Jasso, E Dayss, A S LuytAbstract:Abstract The effects of plasma treatment, used to increase adhesion strength between poly(ethylene terephtalate) (PET) fibres and a Rubber Matrix, were investigated and compared. Morphological changes as a result of atmospheric plasma treatment were observed using scanning electron microscopy (SEM) and atomic force microscopy (AFM). Wettability analysis using a surface energy evaluation system (SEE system) suggested that the plasma treated fibre was more wetting towards a polar liquid. When treated, these fibres showed a new lamellar crystallization, as shown by a new melting peak using differential scanning calorimetry (DSC). X-ray photoelectron spectroscopy (XPS) has been used to study the chemical effect of inert (argon), active and reactive (nitrogen and oxygen) microwave-plasma treatments of a PET surface. Reactive oxygen plasma treatment by a de-convolution method shows new chemical species that drastically alter the chemical reactivity of the PET surface. These studies have also shown that the surface population of chemical species formed after microwave-plasma treatment is dependent on the plasma gas. All these changes cause better adhesion strength of the PET fibres to the Rubber Matrix.
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Influence of plasmas on the structural characterization of polyester fibres determined by Hg-porosimetry
International Journal of Adhesion and Adhesives, 2005Co-Authors: H Krump, I. Hudec, A S LuytAbstract:The effect of atmospheric plasma treatment on the structure of poly(ethyleneterephthalate) (PET) fibres was investigated. An Hg-porosimetry method was used for a detailed investigation of one of the four main adhesion theories, mechanical interlocking, when PET fibres were used as reinforcement material and conventional SBR Rubber as the Matrix. The penetration of the Rubber into the PET fibres was investigated using scanning electron microscopy. The Rubberizing of PET fibres was investigated at two different temperatures in order to compare the influence of Rubber Matrix viscosity. The differences in Hg-porosity suggest that atmospheric plasma treatment has a substantial effect on the interlocking of the Rubber Matrix into the PET fibres.
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adhesion strength study between plasma treated polyester fibres and a Rubber Matrix
Applied Surface Science, 2005Co-Authors: H Krump, M Simor, I Hudec, M Jasso, A S LuytAbstract:In this work, the adhesion strength between poly(ethylene terephthalate) (PET) fibres and styrene-butadiene Rubber (SBR) was studied. The effects of atmospheric plasma treatment, used to increase adhesion strength between PET fibres and the Rubber Matrix, were investigated and compared. It was confirmed that lubricants on the fibres caused a decrease in adhesion strength between the plasma treated reinforcing PET fibres and the SBR Rubber Matrix. These lubricants can be removed by acetone. When washed and treated in plasma, a substantial improvement in adhesion strength was observed. No ageing in air before combination with the Rubber Matrix was observed. This confirmed that the plasma streamers caused the creation of a new, relatively stable chemical species on the polymer surface. It suggests that the surface modification of PET fibres by plasma treatment at atmospheric gas pressure is a suitable and technologically applicable method for the improvement of adhesion strength of polyester reinforcing materials to Rubber.
Rina Sa - One of the best experts on this subject based on the ideXlab platform.
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surface modification of aramid fibers by catechol polyamine codeposition followed by silane grafting for enhanced interfacial adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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Surface Modification of Aramid Fibers by Catechol/Polyamine Codeposition Followed by Silane Grafting for Enhanced Interfacial Adhesion to Rubber Matrix
Industrial & Engineering Chemistry Research, 2016Co-Authors: Lei Wang, Wencai Wang, Ming Tian, Rina Sa, Nanying Ning, Liqun ZhangAbstract:In this work, we develop a modified mussel-inspired method to enhance interfacial adhesion of aramid fiber to a Rubber Matrix. Through a simple dip-coating procedure, catechol and polyamine could initially codeposit as a poly(catechol-polyamine) (PCPA) coating on the surface of the aramid fiber. Then, the PCPA layer could be further grafted with silane coupling agent γ-(glycidyloxypropyltrimethoxysilane) (GPTMS). Results indicated that GPTMS was successfully grafted onto the aramid fiber surface via the bridging of the PCPA layer. The interfacial adhesion between the aramid fibers and the Rubber Matrix was improved compared to that achieved by polydopamine in our previous study. In addition, this method is more applicable to the Rubber industry than polydopamine coating because of its cost-effectiveness and short reaction time.
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improved adhesion properties of poly p phenyleneterephthamide fibers with a Rubber Matrix via uv initiated grafting modification
RSC Advances, 2015Co-Authors: Rina Sa, Wencai Wang, Lei Wang, Yuan Li, Liqun Zhang, Nanying Ning, Ming TianAbstract:In this research, ultraviolet (UV) irradiation induced graft polymerization of glycidyl methacrylate (GMA) was performed to modify the surface properties of poly-p-phenyleneterephthamide (PPTA) fibers. The improvement of adhesion with a Rubber Matrix was achieved due to the introduction of epoxy groups. The successful grafting of GMA on the PPTA fiber surface was ascertained by characterization using X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), and scanning electron microscopy (SEM). The tensile properties of PPTA fibers after each stage of surface modification were determined by tensile testing of single-filaments. A single-fiber pull-out test was applied to evaluate the adhesion of PPTA fibers with the Rubber Matrix. The pull-out force of grafted PPTA fibers exceeded that of the pristine fibers by 53.7%. Resorcinol–formaldehyde–latex (RFL) dipping was applied to further improve the adhesion properties. As a result, the fibers with GMA grafting followed by RFL dipping exhibited a 80.8% improvement compared with the pristine fibers and achieved much higher adhesion strength with Rubber Matrix, compared to the PPTA fibers modified with conventional industrial method of isocyanate (NCO) and RFL two bath dipping.
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Surface modification of aramid fibers by bio-inspired poly(dopamine) and epoxy functionalized silane grafting
ACS Applied Materials and Interfaces, 2014Co-Authors: Rina Sa, Zhenhai Wei, Wencai Wang, Yan Yan, Ming TianAbstract:A novel biomimetic surface modification method for meta-aramid (MPIA) fibers and the improvement on adhesion with Rubber Matrix was demonstrated. Inspired by the composition of adhesive proteins in mussels, we used dopamine (DOPA) self-polymerization to form thin, surface-adherent poly(dopamine) (PDA) films onto the surface of MPIA fibers simply by immersing MPIA fibers in a dopamine solution at room temperature. An epoxy functionalized silane (KH560) grafting was then carried out on the surface of the poly(dopamine)-coated MPIA, either by a one-step or two-step method, to introduce an epoxy group onto the MPIA fiber surface. The surface composition and microstructure of the modified MPIA was characterized by X-ray photoelectron spectroscopy (XPS), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). The results indicated successful grafting of KH560 on the PDA-coated MPIA surface. A single-fiber pull-out test was applied to evaluate the adhesion of MPIA fibers with the Rubber Matrix. Compared with the untreated MPIA fibers, the adhesion strength between the modified MPIA fibers by one step method with Rubber Matrix has an increase of 62.5%.
