Bioresins

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Thiru Aravinthan - One of the best experts on this subject based on the ideXlab platform.

  • processing and characterization of 100 hemp based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2014
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • thermo mechanical properties of epoxidized hemp oil based Bioresins and biocomposites
    Journal of Reinforced Plastics and Composites, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, F Cardona, Thiru Aravinthan
    Abstract:

    Novel epoxidized hemp oil-based biocomposites containing jute fibre reinforcement were produced at the Centre of Excellence in Engineered Fibre Composites (CEEFC) owing to the need to develop new types of biobased materials. Mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and moisture-absorption properties (saturation moisture level and diffusion coefficient) were investigated and compared with samples containing commercially produced epoxidized soybean oil and a synthetic bisphenol A diglycidyl ether-based epoxy control, R246TX cured with a blend of triethylenetetramine and isophorone diamine. Scanning electron microscopy was also performed to investigate the fibre-matrix interface. Epoxidized hemp oil-based samples were found to have marginally superior mechanical, dynamic mechanical and similar water-absorption properties in comparison to samples made with epoxidized soybean oil bioresin; however, both sample types were limited to bioresin concentrations below 30%. Synthetic epoxy-based samples exhibited the highest mechanical, dynamic mechanical and lowest water-absorption properties of all investigated samples. This study has also determined that epoxidized hemp oil-based Bioresins when applied to jute fibre-reinforced biocomposites can compete with commercially produced epoxidized soybean oil in biocomposite applications.

  • Thermo-mechanical properties of acrylated epoxidized hemp oil based biocomposites
    Journal of Composite Materials, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    In this study, novel acrylated epoxidized hemp oil bioresin was used in the manufacturing of jute fibre reinforced biocomposites. The 100% biocomposite laminates were characterised in terms of mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and water absorption properties (saturation moisture level and diffusion coefficient). Comparisons with the equivalent synthetic vinylester resin based jute fibre reinforced biocomposite panels were performed. Scanning electron microscopic analysis confirmed panel samples containing acrylated epoxidized hemp oil to display improved fibre–matrix interfacial adhesion compared with the vinylester resin based samples. Furthermore in terms of mechanical properties acrylated epoxidized hemp oil based biocomposites compared favourably with those manufactured from vinylester resin synthetic resin. Dynamic mechanical analysis found acrylated epoxid...

  • Processing and characterization of 100% hemp-based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2013
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • Green building materials: hemp oil based biocomposites
    World Academy of Science Engineering and Technology International Journal of Chemical Molecular Nuclear Materials and Metallurgical Engineering, 2012
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    Novel acrylated epoxidized hemp oil (AEHO) based Bioresins were successfully synthesised, characterized and applied to biocomposites reinforced with woven jute fibre. Characterisation of the synthesised AEHO consisted of acid number titrations and FTIR spectroscopy to assess the success of the acrylation reaction. Three different matrices were produced (vinylester (VE), 50/50 blend of AEHO/VE and 100% AEHO) and reinforced with jute fibre to form three different types of biocomposite samples. Mechanical properties in the form of flexural and interlaminar shear strength (ILSS) were investigated and compared for the different samples. Results from the mechanical tests showed that AEHO and 50/50 based neat Bioresins displayed lower flexural properties compared with the VE samples. However when applied to biocomposites and compared with VE based samples, AEHO biocomposites demonstrated comparable flexural performance and improved ILSS. These results are attributed to improved fibre-matrix interfacial adhesion due to surface-chemical compatibility between the natural fibres and bioresin.

Nathan W Manthey - One of the best experts on this subject based on the ideXlab platform.

  • processing and characterization of 100 hemp based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2014
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • thermo mechanical properties of epoxidized hemp oil based Bioresins and biocomposites
    Journal of Reinforced Plastics and Composites, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, F Cardona, Thiru Aravinthan
    Abstract:

    Novel epoxidized hemp oil-based biocomposites containing jute fibre reinforcement were produced at the Centre of Excellence in Engineered Fibre Composites (CEEFC) owing to the need to develop new types of biobased materials. Mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and moisture-absorption properties (saturation moisture level and diffusion coefficient) were investigated and compared with samples containing commercially produced epoxidized soybean oil and a synthetic bisphenol A diglycidyl ether-based epoxy control, R246TX cured with a blend of triethylenetetramine and isophorone diamine. Scanning electron microscopy was also performed to investigate the fibre-matrix interface. Epoxidized hemp oil-based samples were found to have marginally superior mechanical, dynamic mechanical and similar water-absorption properties in comparison to samples made with epoxidized soybean oil bioresin; however, both sample types were limited to bioresin concentrations below 30%. Synthetic epoxy-based samples exhibited the highest mechanical, dynamic mechanical and lowest water-absorption properties of all investigated samples. This study has also determined that epoxidized hemp oil-based Bioresins when applied to jute fibre-reinforced biocomposites can compete with commercially produced epoxidized soybean oil in biocomposite applications.

  • Thermo-mechanical properties of acrylated epoxidized hemp oil based biocomposites
    Journal of Composite Materials, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    In this study, novel acrylated epoxidized hemp oil bioresin was used in the manufacturing of jute fibre reinforced biocomposites. The 100% biocomposite laminates were characterised in terms of mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and water absorption properties (saturation moisture level and diffusion coefficient). Comparisons with the equivalent synthetic vinylester resin based jute fibre reinforced biocomposite panels were performed. Scanning electron microscopic analysis confirmed panel samples containing acrylated epoxidized hemp oil to display improved fibre–matrix interfacial adhesion compared with the vinylester resin based samples. Furthermore in terms of mechanical properties acrylated epoxidized hemp oil based biocomposites compared favourably with those manufactured from vinylester resin synthetic resin. Dynamic mechanical analysis found acrylated epoxid...

  • Processing and characterization of 100% hemp-based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2013
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • Green building materials: hemp oil based biocomposites
    World Academy of Science Engineering and Technology International Journal of Chemical Molecular Nuclear Materials and Metallurgical Engineering, 2012
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    Novel acrylated epoxidized hemp oil (AEHO) based Bioresins were successfully synthesised, characterized and applied to biocomposites reinforced with woven jute fibre. Characterisation of the synthesised AEHO consisted of acid number titrations and FTIR spectroscopy to assess the success of the acrylation reaction. Three different matrices were produced (vinylester (VE), 50/50 blend of AEHO/VE and 100% AEHO) and reinforced with jute fibre to form three different types of biocomposite samples. Mechanical properties in the form of flexural and interlaminar shear strength (ILSS) were investigated and compared for the different samples. Results from the mechanical tests showed that AEHO and 50/50 based neat Bioresins displayed lower flexural properties compared with the VE samples. However when applied to biocomposites and compared with VE based samples, AEHO biocomposites demonstrated comparable flexural performance and improved ILSS. These results are attributed to improved fibre-matrix interfacial adhesion due to surface-chemical compatibility between the natural fibres and bioresin.

Smita Mohanty - One of the best experts on this subject based on the ideXlab platform.

  • Curing kinetics of bio-based epoxy resin-toughened DGEBA epoxy resin blend
    Journal of Thermal Analysis and Calorimetry, 2019
    Co-Authors: Sudheer Kumar, Sapan Kumar Samal, Smita Mohanty
    Abstract:

    In the present study, TEIA bioresin was blended with the diglycidyl ether bisphenol A (DGEBA) epoxy resin in different ratios (i.e. 10, 20, 30, 40 mass%), cured with methylhexahydrophthalic anhydride curing agent in the presence of 2-methylimidazole catalyst. The optimized composition of DGEBA and TEIA bioresin blends system was employed as an adhesive strength. The adhesive strength of the TEIA-modified DGEBA epoxy resin blend system was increased from 4.14 to 6.31 MPa on an aluminium substrate compared to the DGEBA epoxy resin. The curing kinetics of non-isothermal, DGEBA epoxy resin and its bio-based blend systems were investigated employing differential scanning calorimetry. An increase in the peak temperature and reduction in a heat of curing as well as activation energy in DGEBA epoxy resin were observed with the addition of TEIA bioresin content. The activation energy ( E _a) of the DGEBA resin and their bio-based blend system were obtained from Kissinger and Flynn–Wall–Ozawa methods.

  • Epoxidized Soybean Oil-Based Epoxy Blend Cured with Anhydride-Based Cross-Linker: Thermal and Mechanical Characterization
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Sudheer Kumar, Smita Mohanty, Sushanta K. Samal, Sanjay K. Nayak
    Abstract:

    The present research is based on a comparative study of anhydride cured biobased and petroleum-based epoxy network. The effect of epoxidized soybean oil (ESO) bioresin on petroleum-based epoxy (DGEBA) at varying compositions cured with methylhexahydrophthalic anhydride (MHHPA) as curing agent and 2-methyl imidazole (2-MI) as the catalyst has been investigated. The tensile strength of virgin epoxy (42.94 MPa) increased to 48.62 MPa with the addition of 20% of ESO. The fracture toughness parameters; critical stress intensity factor (KIC) and critical strain energy release rate revealed enhancement of toughness in the biobased blends. Differential scanning calorimetry studies confirmed an enhancement in the peak temperature and a reduction in the heat of curing in virgin epoxy on incorporation of ESO content. The thermomechanical and fracture morphological properties of virgin epoxy, ESO, and its biobased blends were investigated by thermogravimetric analysis, dynamic mechanical analysis, atomic force micros...

  • Study of thermal stability and thermo-mechanical behavior of functionalized soybean oil modified toughened epoxy/organo clay nanocomposite
    Progress in Organic Coatings, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Abstract In the current study, nano-clay was incorporated in toughened epoxy modified with epoxidized soybean oil (ESO) to improve the mechanical and thermal properties. Curing behavior was studied by Fourier Transform Infrared spectroscopy and Differential Scanning Calorimetry analysis to investigate the effect of ESO bioresin and nanoclay on cross-linking reaction. The increase in enthalpy of curing reaction and decrease in peak temperature of nanocomposite corroborated the catalytic effect of clay on the curing process. The thermal stability parameters like integral procedural decomposition temperature and decomposed activation energy were determined using Horowitz and Metzger equation. Dynamic mechanical analysis demonstrated the high storage modulus, improved crosslink density and good damping behavior of nanocomposite. Thermo mechanical analyzer was used to examine the coefficient of thermal expansion (CTE) of bio-based epoxy blend and nanocomposite in both glassy and rubbery region. The CTE value is decreased after addition of clay to the modified epoxy blend which confirmed the improved dimensional stability of the nanocomposite. TEM and X-ray diffraction analysis confirmed both intercalated and exfoliated clay platelet within the epoxy blend.

  • A study on effect of organo modified clay on curing behavior and thermo-physical properties of epoxy methyl ester based epoxy nanocomposite
    Thermochimica Acta, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Abstract Non-isothermal curing kinetics was studied using differential scanning calorimetry (DSC) analysis to investigate the effect of nanoclay (C30B) on crosslinking reaction of epoxidized methyl soyate bioresin modified epoxy blend curing with triethylenetetramine. The kinetic parameters were determined by using Kissinger–Akahira–Sunose method and autocatalytic model. Addition of bioresin lowered the activation energy of epoxy on account of reduced viscosity allowing better contact of resin with curing agent. On the other hand incorporation of clay within the epoxy blend increased the activation energy ( E a ) of curing due to the steric effect of clay and increased viscosity. The overall order of the reaction m  +  n was found to be increased on addition of bioresin and decreased on incorporation of C30B clay within blend. Dynamic mechanical analysis revealed higher glass transition temperature and crosslink density of the nanocomposite. Thermal stability of epoxy blend is enhanced by addition of clay which restricted the mobility of chain and hindered the decomposition process.

  • Study on the effect of woven sisal fiber mat on mechanical and viscoelastic properties of petroleum based epoxy and bioresin modified toughened epoxy network
    Journal of Applied Polymer Science, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Sisal fiber reinforced biocomposites are developed using both unmodified petrol based epoxy and bioresin modified epoxy as base matrix. Two Bioresins, epoxidized soybean oil and epoxy methyl soyate (EMS) are used to modify the epoxy matrix for effective toughening and subsequently two layers of sisal fiber mat are incorporated to improve the mechanical and thermomechanical properties. Higher strength and modulus of the EMS modified epoxy composites reveals good interfacial bonding of matrix with the fibers. Fracture toughness parameters KIC and GIC are determined and found to be enhanced significantly. Notched impact strength is found to be higher for unmodified epoxy composite, whereas elongation at break is found to be much higher for modified epoxy blend. Dynamic mechanical analysis shows an improvement in the storage modulus for bioresin toughened composites on the account stiffness imparted by fibers. Loss modulus is found to be higher for EMS modified epoxy composite because of strong fiber–matrix interfacial bonding. Loss tangent curves show a strong influence of bioresin on damping behavior of epoxy composite. Strong fiber–matrix interface is found in modified epoxy composite by scanning electron microscopic analysis. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42699.

Sanjay K. Nayak - One of the best experts on this subject based on the ideXlab platform.

  • Epoxidized Soybean Oil-Based Epoxy Blend Cured with Anhydride-Based Cross-Linker: Thermal and Mechanical Characterization
    Industrial & Engineering Chemistry Research, 2017
    Co-Authors: Sudheer Kumar, Smita Mohanty, Sushanta K. Samal, Sanjay K. Nayak
    Abstract:

    The present research is based on a comparative study of anhydride cured biobased and petroleum-based epoxy network. The effect of epoxidized soybean oil (ESO) bioresin on petroleum-based epoxy (DGEBA) at varying compositions cured with methylhexahydrophthalic anhydride (MHHPA) as curing agent and 2-methyl imidazole (2-MI) as the catalyst has been investigated. The tensile strength of virgin epoxy (42.94 MPa) increased to 48.62 MPa with the addition of 20% of ESO. The fracture toughness parameters; critical stress intensity factor (KIC) and critical strain energy release rate revealed enhancement of toughness in the biobased blends. Differential scanning calorimetry studies confirmed an enhancement in the peak temperature and a reduction in the heat of curing in virgin epoxy on incorporation of ESO content. The thermomechanical and fracture morphological properties of virgin epoxy, ESO, and its biobased blends were investigated by thermogravimetric analysis, dynamic mechanical analysis, atomic force micros...

  • Study of thermal stability and thermo-mechanical behavior of functionalized soybean oil modified toughened epoxy/organo clay nanocomposite
    Progress in Organic Coatings, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Abstract In the current study, nano-clay was incorporated in toughened epoxy modified with epoxidized soybean oil (ESO) to improve the mechanical and thermal properties. Curing behavior was studied by Fourier Transform Infrared spectroscopy and Differential Scanning Calorimetry analysis to investigate the effect of ESO bioresin and nanoclay on cross-linking reaction. The increase in enthalpy of curing reaction and decrease in peak temperature of nanocomposite corroborated the catalytic effect of clay on the curing process. The thermal stability parameters like integral procedural decomposition temperature and decomposed activation energy were determined using Horowitz and Metzger equation. Dynamic mechanical analysis demonstrated the high storage modulus, improved crosslink density and good damping behavior of nanocomposite. Thermo mechanical analyzer was used to examine the coefficient of thermal expansion (CTE) of bio-based epoxy blend and nanocomposite in both glassy and rubbery region. The CTE value is decreased after addition of clay to the modified epoxy blend which confirmed the improved dimensional stability of the nanocomposite. TEM and X-ray diffraction analysis confirmed both intercalated and exfoliated clay platelet within the epoxy blend.

  • A study on effect of organo modified clay on curing behavior and thermo-physical properties of epoxy methyl ester based epoxy nanocomposite
    Thermochimica Acta, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Abstract Non-isothermal curing kinetics was studied using differential scanning calorimetry (DSC) analysis to investigate the effect of nanoclay (C30B) on crosslinking reaction of epoxidized methyl soyate bioresin modified epoxy blend curing with triethylenetetramine. The kinetic parameters were determined by using Kissinger–Akahira–Sunose method and autocatalytic model. Addition of bioresin lowered the activation energy of epoxy on account of reduced viscosity allowing better contact of resin with curing agent. On the other hand incorporation of clay within the epoxy blend increased the activation energy ( E a ) of curing due to the steric effect of clay and increased viscosity. The overall order of the reaction m  +  n was found to be increased on addition of bioresin and decreased on incorporation of C30B clay within blend. Dynamic mechanical analysis revealed higher glass transition temperature and crosslink density of the nanocomposite. Thermal stability of epoxy blend is enhanced by addition of clay which restricted the mobility of chain and hindered the decomposition process.

  • Study on the effect of woven sisal fiber mat on mechanical and viscoelastic properties of petroleum based epoxy and bioresin modified toughened epoxy network
    Journal of Applied Polymer Science, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Sisal fiber reinforced biocomposites are developed using both unmodified petrol based epoxy and bioresin modified epoxy as base matrix. Two Bioresins, epoxidized soybean oil and epoxy methyl soyate (EMS) are used to modify the epoxy matrix for effective toughening and subsequently two layers of sisal fiber mat are incorporated to improve the mechanical and thermomechanical properties. Higher strength and modulus of the EMS modified epoxy composites reveals good interfacial bonding of matrix with the fibers. Fracture toughness parameters KIC and GIC are determined and found to be enhanced significantly. Notched impact strength is found to be higher for unmodified epoxy composite, whereas elongation at break is found to be much higher for modified epoxy blend. Dynamic mechanical analysis shows an improvement in the storage modulus for bioresin toughened composites on the account stiffness imparted by fibers. Loss modulus is found to be higher for EMS modified epoxy composite because of strong fiber–matrix interfacial bonding. Loss tangent curves show a strong influence of bioresin on damping behavior of epoxy composite. Strong fiber–matrix interface is found in modified epoxy composite by scanning electron microscopic analysis. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42699.

  • Effect of lignocellulosic fibers on mechanical, thermomechanical and hydrophilic studies of epoxy modified with novel bioresin epoxy methyl ester derived from soybean oil
    Polymers for Advanced Technologies, 2015
    Co-Authors: Sushanta K. Sahoo, Smita Mohanty, Sanjay K. Nayak
    Abstract:

    Epoxy resin is modified with epoxy methyl soyate synthesized from soybean oil to toughen the matrix and reduce the viscosity of resin system. Unidirectional sisal fibers in mat form were incorporated at different orientations of [0/0] and [0/90] as reinforcement in epoxy blend having more toughened nature. Highly improved strength and modulus of the [0/0] laminated composite revealed strong interfacial region of matrix for binding the fibers. Further, notched impact strength of the composites was found to be more than 700% higher compared with modified epoxy blend. Dynamic mechanical analysis depicted an improvement in the storage modulus and higher damping factor of the [0/0] sisal fiber laminated composite, which confirms better damping properties under vibrating conditions. The fiber-matrix interfacial adhesion in the composite was confirmed by scanning electron microscopic analysis of the fractured specimens. Contact angle and atomic force microscopic studies were carried out to reveal the hydrophilic nature. Copyright © 2015 John Wiley & Sons, Ltd.

Gaston Francucci - One of the best experts on this subject based on the ideXlab platform.

  • processing and characterization of 100 hemp based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2014
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • thermo mechanical properties of epoxidized hemp oil based Bioresins and biocomposites
    Journal of Reinforced Plastics and Composites, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, F Cardona, Thiru Aravinthan
    Abstract:

    Novel epoxidized hemp oil-based biocomposites containing jute fibre reinforcement were produced at the Centre of Excellence in Engineered Fibre Composites (CEEFC) owing to the need to develop new types of biobased materials. Mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and moisture-absorption properties (saturation moisture level and diffusion coefficient) were investigated and compared with samples containing commercially produced epoxidized soybean oil and a synthetic bisphenol A diglycidyl ether-based epoxy control, R246TX cured with a blend of triethylenetetramine and isophorone diamine. Scanning electron microscopy was also performed to investigate the fibre-matrix interface. Epoxidized hemp oil-based samples were found to have marginally superior mechanical, dynamic mechanical and similar water-absorption properties in comparison to samples made with epoxidized soybean oil bioresin; however, both sample types were limited to bioresin concentrations below 30%. Synthetic epoxy-based samples exhibited the highest mechanical, dynamic mechanical and lowest water-absorption properties of all investigated samples. This study has also determined that epoxidized hemp oil-based Bioresins when applied to jute fibre-reinforced biocomposites can compete with commercially produced epoxidized soybean oil in biocomposite applications.

  • Thermo-mechanical properties of acrylated epoxidized hemp oil based biocomposites
    Journal of Composite Materials, 2013
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    In this study, novel acrylated epoxidized hemp oil bioresin was used in the manufacturing of jute fibre reinforced biocomposites. The 100% biocomposite laminates were characterised in terms of mechanical properties (tensile, flexural, Charpy impact and interlaminar shear), thermo-mechanical properties (glass transition temperature, storage modulus and crosslink density) and water absorption properties (saturation moisture level and diffusion coefficient). Comparisons with the equivalent synthetic vinylester resin based jute fibre reinforced biocomposite panels were performed. Scanning electron microscopic analysis confirmed panel samples containing acrylated epoxidized hemp oil to display improved fibre–matrix interfacial adhesion compared with the vinylester resin based samples. Furthermore in terms of mechanical properties acrylated epoxidized hemp oil based biocomposites compared favourably with those manufactured from vinylester resin synthetic resin. Dynamic mechanical analysis found acrylated epoxid...

  • Processing and characterization of 100% hemp-based biocomposites obtained by vacuum infusion
    Journal of Composite Materials, 2013
    Co-Authors: Gaston Francucci, Nathan W Manthey, F Cardona, Thiru Aravinthan
    Abstract:

    Novel biocomposites made of an acrylated epoxidized hemp oil based bioresin reinforced with random hemp fiber mat were manufactured by the vacuum infusion technique. Mechanical properties (tensile,...

  • Green building materials: hemp oil based biocomposites
    World Academy of Science Engineering and Technology International Journal of Chemical Molecular Nuclear Materials and Metallurgical Engineering, 2012
    Co-Authors: Nathan W Manthey, Gaston Francucci, Francisco Cardona, Thiru Aravinthan
    Abstract:

    Novel acrylated epoxidized hemp oil (AEHO) based Bioresins were successfully synthesised, characterized and applied to biocomposites reinforced with woven jute fibre. Characterisation of the synthesised AEHO consisted of acid number titrations and FTIR spectroscopy to assess the success of the acrylation reaction. Three different matrices were produced (vinylester (VE), 50/50 blend of AEHO/VE and 100% AEHO) and reinforced with jute fibre to form three different types of biocomposite samples. Mechanical properties in the form of flexural and interlaminar shear strength (ILSS) were investigated and compared for the different samples. Results from the mechanical tests showed that AEHO and 50/50 based neat Bioresins displayed lower flexural properties compared with the VE samples. However when applied to biocomposites and compared with VE based samples, AEHO biocomposites demonstrated comparable flexural performance and improved ILSS. These results are attributed to improved fibre-matrix interfacial adhesion due to surface-chemical compatibility between the natural fibres and bioresin.

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