The Experts below are selected from a list of 3441 Experts worldwide ranked by ideXlab platform
Jinping Qu - One of the best experts on this subject based on the ideXlab platform.
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structure and properties of polylactide poly butylene succinate Organically Modified Montmorillonite nanocomposites with high efficiency intercalation and exfoliation effect manufactured via volume pulsating elongation flow
Polymer, 2019Co-Authors: Yue He, Jinping QuAbstract:Abstract The Polylactide (PLA)/Poly(butylene succinate)(PBS)/Organically Modified Montmorillonite (OMMT) nanocomposites with different ratio were manufactured via intense volume pulsating elongation flow. The nanostructure, microscopic morphology, crystallization property, thermostability, mechanical properties were well investigated. The processing mechanism was well discussed. The OMMT (C30B) was well dispersed, intercalated, and exfoliated in all the nanocomposites. The interlayer spacing doubled in all the nanocomposites. The clay mainly dispersed in PBS and located at the interface of PLA/PBS in all samples, which could be predicted by the interfacial tension, enthalpic interaction, and wettability parameter. Diameter of the in situ formed PBS fiber decreased as the C30B content increased. Nanocomposites with PBS content range from 30% to 70% displayed the co-continuous structure. The Young's modulus and elongation at break of the blend increased significantly by adding the clay.
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Structure and properties of Polylactide/Poly(butylene succinate)/Organically Modified Montmorillonite nanocomposites with high-efficiency intercalation and exfoliation effect manufactured via volume pulsating elongation flow
Polymer, 2019Co-Authors: Yue He, Jinping QuAbstract:Abstract The Polylactide (PLA)/Poly(butylene succinate)(PBS)/Organically Modified Montmorillonite (OMMT) nanocomposites with different ratio were manufactured via intense volume pulsating elongation flow. The nanostructure, microscopic morphology, crystallization property, thermostability, mechanical properties were well investigated. The processing mechanism was well discussed. The OMMT (C30B) was well dispersed, intercalated, and exfoliated in all the nanocomposites. The interlayer spacing doubled in all the nanocomposites. The clay mainly dispersed in PBS and located at the interface of PLA/PBS in all samples, which could be predicted by the interfacial tension, enthalpic interaction, and wettability parameter. Diameter of the in situ formed PBS fiber decreased as the C30B content increased. Nanocomposites with PBS content range from 30% to 70% displayed the co-continuous structure. The Young's modulus and elongation at break of the blend increased significantly by adding the clay.
Yue He - One of the best experts on this subject based on the ideXlab platform.
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structure and properties of polylactide poly butylene succinate Organically Modified Montmorillonite nanocomposites with high efficiency intercalation and exfoliation effect manufactured via volume pulsating elongation flow
Polymer, 2019Co-Authors: Yue He, Jinping QuAbstract:Abstract The Polylactide (PLA)/Poly(butylene succinate)(PBS)/Organically Modified Montmorillonite (OMMT) nanocomposites with different ratio were manufactured via intense volume pulsating elongation flow. The nanostructure, microscopic morphology, crystallization property, thermostability, mechanical properties were well investigated. The processing mechanism was well discussed. The OMMT (C30B) was well dispersed, intercalated, and exfoliated in all the nanocomposites. The interlayer spacing doubled in all the nanocomposites. The clay mainly dispersed in PBS and located at the interface of PLA/PBS in all samples, which could be predicted by the interfacial tension, enthalpic interaction, and wettability parameter. Diameter of the in situ formed PBS fiber decreased as the C30B content increased. Nanocomposites with PBS content range from 30% to 70% displayed the co-continuous structure. The Young's modulus and elongation at break of the blend increased significantly by adding the clay.
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Structure and properties of Polylactide/Poly(butylene succinate)/Organically Modified Montmorillonite nanocomposites with high-efficiency intercalation and exfoliation effect manufactured via volume pulsating elongation flow
Polymer, 2019Co-Authors: Yue He, Jinping QuAbstract:Abstract The Polylactide (PLA)/Poly(butylene succinate)(PBS)/Organically Modified Montmorillonite (OMMT) nanocomposites with different ratio were manufactured via intense volume pulsating elongation flow. The nanostructure, microscopic morphology, crystallization property, thermostability, mechanical properties were well investigated. The processing mechanism was well discussed. The OMMT (C30B) was well dispersed, intercalated, and exfoliated in all the nanocomposites. The interlayer spacing doubled in all the nanocomposites. The clay mainly dispersed in PBS and located at the interface of PLA/PBS in all samples, which could be predicted by the interfacial tension, enthalpic interaction, and wettability parameter. Diameter of the in situ formed PBS fiber decreased as the C30B content increased. Nanocomposites with PBS content range from 30% to 70% displayed the co-continuous structure. The Young's modulus and elongation at break of the blend increased significantly by adding the clay.
Arjun Maity - One of the best experts on this subject based on the ideXlab platform.
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breakthrough studies for cr vi sorption from aqueous solution using exfoliated polypyrrole Organically Modified Montmorillonite clay nanocomposite
Journal of Industrial and Engineering Chemistry, 2014Co-Authors: Katlego Setshedi, Madhumita Bhaumik, Maurice S Onyango, Arjun MaityAbstract:Abstract Fixed bed adsorption column studies were carried out to assess the breakthrough performance of the polypyrrole-Organically Modified Montmorillonite clay (PPy-OMMT NC) for removal of toxic Cr(VI) from water. The effects of bed mass, initial Cr(VI) concentration and flow rate on the bed performance were evaluated and a notable bed performance (3.2 L treated water) was achieved at high bed mass, low inlet Cr(VI) concentration and flow rate. Experimental data agreed well with the Thomas and Yoon–Nelson model. Based on performance data, it can be concluded that the PPy-OMMT NC is a competitive sorption media for Cr(VI) removal from aqueous environments.
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exfoliated polypyrrole Organically Modified Montmorillonite clay nanocomposite as a potential adsorbent for cr vi removal
Chemical Engineering Journal, 2013Co-Authors: Katlego Setshedi, Madhumita Bhaumik, Maurice S Onyango, Segametsi Songwane, Arjun MaityAbstract:Abstract Exfoliated polypyrrole-Organically Modified Montmorillonite clay nanocomposite (PPy-OMMT NC), was prepared as a potential adsorbent, via in situ polymerization of pyrrole monomer for adsorption of toxic Cr(VI) from aqueous solution. The WAXD and SAXS results indicated that the clay sheets were exfoliated in the prepared nanocomposite. HR-TEM results showed good dispersion of the clay into the polymer matrix. The presence of the PPy polymer in the nanocomposite and adsorption of Cr(VI) onto the nanocomposite were confirmed using ATR-FTIR. Using the BET method, an improved surface area was observed for the PPy-OMMT NC compared to native clay. Batch adsorption studies whereby the pH, initial Cr(VI) concentration, sorbent dosage and temperature were varied, revealed that Cr(VI) adsorption process was rapid, spontaneous in nature and favoured with increased temperature at pH 2. The kinetic data fitted well to the pseudo second order kinetic model while the equilibrium data was satisfactorily described by the Langmuir isotherm. The Langmuir maximum adsorption capacity of Cr(VI) onto PPy-OMMT NC at pH 2.0 was found to be 112.3, 119.34, 176.2 and 209.6 mg/g at 292 K, 298 K, 308 K and 318 K, respectively. The selective adsorption of Cr(VI) was demonstrated in binary adsorption systems with co-existing ions. Moreover, desorption experiments revealed that the nanocomposite can be reused effectively for two consecutive adsorption–desorption cycles without any loss of its original capacity. Groundwater test results showed that the nanocomposite is a potential adsorbent for Cr(VI) ion removal from contaminated water sources.
Katlego Setshedi - One of the best experts on this subject based on the ideXlab platform.
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breakthrough studies for cr vi sorption from aqueous solution using exfoliated polypyrrole Organically Modified Montmorillonite clay nanocomposite
Journal of Industrial and Engineering Chemistry, 2014Co-Authors: Katlego Setshedi, Madhumita Bhaumik, Maurice S Onyango, Arjun MaityAbstract:Abstract Fixed bed adsorption column studies were carried out to assess the breakthrough performance of the polypyrrole-Organically Modified Montmorillonite clay (PPy-OMMT NC) for removal of toxic Cr(VI) from water. The effects of bed mass, initial Cr(VI) concentration and flow rate on the bed performance were evaluated and a notable bed performance (3.2 L treated water) was achieved at high bed mass, low inlet Cr(VI) concentration and flow rate. Experimental data agreed well with the Thomas and Yoon–Nelson model. Based on performance data, it can be concluded that the PPy-OMMT NC is a competitive sorption media for Cr(VI) removal from aqueous environments.
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exfoliated polypyrrole Organically Modified Montmorillonite clay nanocomposite as a potential adsorbent for cr vi removal
Chemical Engineering Journal, 2013Co-Authors: Katlego Setshedi, Madhumita Bhaumik, Maurice S Onyango, Segametsi Songwane, Arjun MaityAbstract:Abstract Exfoliated polypyrrole-Organically Modified Montmorillonite clay nanocomposite (PPy-OMMT NC), was prepared as a potential adsorbent, via in situ polymerization of pyrrole monomer for adsorption of toxic Cr(VI) from aqueous solution. The WAXD and SAXS results indicated that the clay sheets were exfoliated in the prepared nanocomposite. HR-TEM results showed good dispersion of the clay into the polymer matrix. The presence of the PPy polymer in the nanocomposite and adsorption of Cr(VI) onto the nanocomposite were confirmed using ATR-FTIR. Using the BET method, an improved surface area was observed for the PPy-OMMT NC compared to native clay. Batch adsorption studies whereby the pH, initial Cr(VI) concentration, sorbent dosage and temperature were varied, revealed that Cr(VI) adsorption process was rapid, spontaneous in nature and favoured with increased temperature at pH 2. The kinetic data fitted well to the pseudo second order kinetic model while the equilibrium data was satisfactorily described by the Langmuir isotherm. The Langmuir maximum adsorption capacity of Cr(VI) onto PPy-OMMT NC at pH 2.0 was found to be 112.3, 119.34, 176.2 and 209.6 mg/g at 292 K, 298 K, 308 K and 318 K, respectively. The selective adsorption of Cr(VI) was demonstrated in binary adsorption systems with co-existing ions. Moreover, desorption experiments revealed that the nanocomposite can be reused effectively for two consecutive adsorption–desorption cycles without any loss of its original capacity. Groundwater test results showed that the nanocomposite is a potential adsorbent for Cr(VI) ion removal from contaminated water sources.
Ishak Ahmad - One of the best experts on this subject based on the ideXlab platform.
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effects of hybridized Organically Modified Montmorillonite and cellulose nanocrystals on rheological properties and thermal stability of k carrageenan bio nanocomposite
Nanomaterials, 2019Co-Authors: Siti Zarina Zakuwan, Ishak AhmadAbstract:Herein, hybrid k-carrageenan bio-nanocomposite films were fabricated by using two types of nanofillers, Organically Modified Montmorillonite (OMMT), and cellulose nanocrystals (CNCs). Hybrid bio-nanocomposite films were made by casting techniques employing 4 wt% of CNCs, OMMT, and hybridized CNCs/OMMT in a 1:1 ratio. The rheological and morphological properties and thermal stability of all composites were investigated using rotational rheometry, thermogravimetry analysis, differential scanning calorimetry, field emission scanning electron microscopy, and transmission electron microscopy (TEM). The results showed that the hybrid CNC/OMMT bio-nanocomposite exhibited significantly improved properties as compared to those for the bio-nanocomposites with single fillers due to the nanosize and homogenous nanofiller dispersion in the matrix. Rheological analysis of the hybrid bio-nanocomposite showed higher dynamic shear storage modulus and complex viscosity values when compared to those for the bio-nanocomposite with individual fillers. The TEM analysis of the hybridized CNC/OMMT bio-nanocomposite revealed that more particles were packed together in the CNC network, which restricted the matrix mobility. The heat resistance and thermal stability bio-nanocomposite k-carrageenan film enhanced rapidly with the addition of hybridized CNCs/OMMT to 275 °C. The hybridized CNCs/OMMT exhibited synergistic effects due to the good affinity through interfacial interactions, resulting in the improvement of the material properties.
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synergistic effect of hybridized cellulose nanocrystals and Organically Modified Montmorillonite on κ carrageenan bionanocomposites
Nanomaterials, 2018Co-Authors: Siti Zarina Zakuwan, Ishak AhmadAbstract:The synergistic effect of using κ-carrageenan bionanocomposites with the hybridization of cellulose nanocrystals (CNCs) and Organically Modified Montmorillonite (OMMT) reinforcements was studied. The effects of different reinforcements and filler contents were evaluated through mechanical testing, and morphological and water uptake properties. The tensile strength and Young’s modulus of both bionanocomposites increased with filler loading and optimized at 4%. OMMT incorporation into the κ-carrageenan/CNCs bionanocomposites resulted in further mechanical property improvement with an optimum ratio of 1:1 (CNCs:OMMT) while maintaining high film transparency. X-ray diffraction and morphological analyses revealed that intercalation occurred between the κ-carrageenan bionanocomposite matrix and OMMT. The water uptake of the κ-carrageenan bionanocomposites was significantly reduced by the addition of both CNCs and OMMT. The enhancements in the mechanical properties and performance of the hybrid bionanocomposite indicate compatibility among the reinforcement, biopolymer, and well-dispersed nanoparticles. This renders the hybrid CNC/OMMT/κ-carrageenan nanocomposites extremely promising for food packaging applications.