The Experts below are selected from a list of 6843 Experts worldwide ranked by ideXlab platform
Richard S. Parnas - One of the best experts on this subject based on the ideXlab platform.
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toughened wheat gluten and treated Coconut Fiber composite
Composites Part A-applied Science and Manufacturing, 2014Co-Authors: Cheng Diao, Sudsiri Hemsri, Timothy Dowding, Richard S. ParnasAbstract:Abstract The aim of the present work is to fabricate a biodegradable composite with improved mechanical properties and high work to failure by combining toughened wheat gluten matrix with 15 mass% surface treated, highly ductile Coconut Fiber. Matrix cracking at a flexural stress of 46 MPa in wheat gluten was delayed until nearly 71 MPa in the composite, with ultimate stress greater than 105 MPa. Flexural stiffness was improved from roughly 4 GPa in the wheat gluten to 5.4 GPa in the composite. The work to failure was improved from 0.26 MJ/m 3 in wheat gluten to 1.45 MJ/m 3 with the toughened wheat gluten, and finally to 4.94 MJ/m 3 for the composite. The toughening additive for the wheat gluten was shown to “erase” aging effects in the wheat gluten but also appeared to change the interfacial characteristics.
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Wheat gluten composites reinforced with Coconut Fiber
Composites Part A: Applied Science and Manufacturing, 2012Co-Authors: Sudsiri Hemsri, Kasia Grieco, Alexandru D. Asandei, Richard S. ParnasAbstract:Abstract Coconut Fiber-reinforced wheat gluten (WG) biocomposites were fabricated. The Coconut Fibers (CCFs) were chemically modified by either sodium hydroxide or silane treatment, as well as following the alkali surface treatment with a silane treatment. (3-triethoxysilylpropyl)-t-butylcarbamate (carbamate silane), which is a masked isocyanate functional silane, was used for the first time to improve interfacial adhesion between WG and natural Fibers. X-ray photoelectron spectroscopy (XPS) and gas chromatography/mass spectroscopy (GC/MS) analyses were employed to prove the presence of the silane on silane-treated Coconut Fiber (SCCF) and alkali-followed by silane-treated Fiber (ASCCF). It was found that ASCCF has more silane content on the Fiber surface than SCCF. The mechanical properties of composites with 15 mass% Fiber loading were assessed by three-point bending tests. Moreover, scanning electron microscopy (SEM) was used to investigate fracture surface characteristics of composites. The WG/ASCCF composite provided an 80% increase in strength, and showed superior Fiber–matrix interfacial adhesion.
Sudsiri Hemsri - One of the best experts on this subject based on the ideXlab platform.
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toughened wheat gluten and treated Coconut Fiber composite
Composites Part A-applied Science and Manufacturing, 2014Co-Authors: Cheng Diao, Sudsiri Hemsri, Timothy Dowding, Richard S. ParnasAbstract:Abstract The aim of the present work is to fabricate a biodegradable composite with improved mechanical properties and high work to failure by combining toughened wheat gluten matrix with 15 mass% surface treated, highly ductile Coconut Fiber. Matrix cracking at a flexural stress of 46 MPa in wheat gluten was delayed until nearly 71 MPa in the composite, with ultimate stress greater than 105 MPa. Flexural stiffness was improved from roughly 4 GPa in the wheat gluten to 5.4 GPa in the composite. The work to failure was improved from 0.26 MJ/m 3 in wheat gluten to 1.45 MJ/m 3 with the toughened wheat gluten, and finally to 4.94 MJ/m 3 for the composite. The toughening additive for the wheat gluten was shown to “erase” aging effects in the wheat gluten but also appeared to change the interfacial characteristics.
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Wheat gluten composites reinforced with Coconut Fiber
Composites Part A: Applied Science and Manufacturing, 2012Co-Authors: Sudsiri Hemsri, Kasia Grieco, Alexandru D. Asandei, Richard S. ParnasAbstract:Abstract Coconut Fiber-reinforced wheat gluten (WG) biocomposites were fabricated. The Coconut Fibers (CCFs) were chemically modified by either sodium hydroxide or silane treatment, as well as following the alkali surface treatment with a silane treatment. (3-triethoxysilylpropyl)-t-butylcarbamate (carbamate silane), which is a masked isocyanate functional silane, was used for the first time to improve interfacial adhesion between WG and natural Fibers. X-ray photoelectron spectroscopy (XPS) and gas chromatography/mass spectroscopy (GC/MS) analyses were employed to prove the presence of the silane on silane-treated Coconut Fiber (SCCF) and alkali-followed by silane-treated Fiber (ASCCF). It was found that ASCCF has more silane content on the Fiber surface than SCCF. The mechanical properties of composites with 15 mass% Fiber loading were assessed by three-point bending tests. Moreover, scanning electron microscopy (SEM) was used to investigate fracture surface characteristics of composites. The WG/ASCCF composite provided an 80% increase in strength, and showed superior Fiber–matrix interfacial adhesion.
Cheng Diao - One of the best experts on this subject based on the ideXlab platform.
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toughened wheat gluten and treated Coconut Fiber composite
Composites Part A-applied Science and Manufacturing, 2014Co-Authors: Cheng Diao, Sudsiri Hemsri, Timothy Dowding, Richard S. ParnasAbstract:Abstract The aim of the present work is to fabricate a biodegradable composite with improved mechanical properties and high work to failure by combining toughened wheat gluten matrix with 15 mass% surface treated, highly ductile Coconut Fiber. Matrix cracking at a flexural stress of 46 MPa in wheat gluten was delayed until nearly 71 MPa in the composite, with ultimate stress greater than 105 MPa. Flexural stiffness was improved from roughly 4 GPa in the wheat gluten to 5.4 GPa in the composite. The work to failure was improved from 0.26 MJ/m 3 in wheat gluten to 1.45 MJ/m 3 with the toughened wheat gluten, and finally to 4.94 MJ/m 3 for the composite. The toughening additive for the wheat gluten was shown to “erase” aging effects in the wheat gluten but also appeared to change the interfacial characteristics.
Iara C De Miranda - One of the best experts on this subject based on the ideXlab platform.
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decomposition through pyrolysis process of Coconut Fiber and rice husk and determination of kinetic parameters according isoconversional methods
Journal of Thermal Analysis and Calorimetry, 2018Co-Authors: Cheila G Mothe, Iara C De MirandaAbstract:Pyrolysis process of Coconut Fiber and rice husk was studied with the purpose of determining the kinetic parameters activation energy (E) and logarithm of pre-exponential factor (log A) in agreement with converted fraction (α). The determination of kinetic parameters was done through software Thermokinetics by NETZSCH, which associated ‘‘Model Free’’ package enabled the determination of these parameters by Friedman and Ozawa–Flynn–Wall isoconversion models and a probable mechanism that describes the thermal decomposition process of these materials. The thermal degradation of Coconut Fiber and rice husk was carried out in the range of 303–1073 K under nitrogen flow, and the heating rate used was 2.5, 5, 10, 15 and 20 K min−1. The obtained results showed that the most appropriate kinetic model to describe the thermal decomposition of Coconut Fiber and rice husk was the autocatalytic reactions model in two parallel reactions (FnCn model).
Timothy Dowding - One of the best experts on this subject based on the ideXlab platform.
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toughened wheat gluten and treated Coconut Fiber composite
Composites Part A-applied Science and Manufacturing, 2014Co-Authors: Cheng Diao, Sudsiri Hemsri, Timothy Dowding, Richard S. ParnasAbstract:Abstract The aim of the present work is to fabricate a biodegradable composite with improved mechanical properties and high work to failure by combining toughened wheat gluten matrix with 15 mass% surface treated, highly ductile Coconut Fiber. Matrix cracking at a flexural stress of 46 MPa in wheat gluten was delayed until nearly 71 MPa in the composite, with ultimate stress greater than 105 MPa. Flexural stiffness was improved from roughly 4 GPa in the wheat gluten to 5.4 GPa in the composite. The work to failure was improved from 0.26 MJ/m 3 in wheat gluten to 1.45 MJ/m 3 with the toughened wheat gluten, and finally to 4.94 MJ/m 3 for the composite. The toughening additive for the wheat gluten was shown to “erase” aging effects in the wheat gluten but also appeared to change the interfacial characteristics.