The Experts below are selected from a list of 2415 Experts worldwide ranked by ideXlab platform
António Pedro Souto - One of the best experts on this subject based on the ideXlab platform.
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Structural coloration of chitosan coated cellulose Fabrics by electrostatic self-assembled poly (styrene-methyl methacrylate-acrylic acid) photonic crystals.
Carbohydrate Polymers, 2018Co-Authors: Gonul Yavuz, Necdet Seventekin, Andrea Zille, António Pedro SoutoAbstract:Abstract The structural coloration of a chitosan-coated Woven Cotton Fabric obtained by glutaraldehyde-stabilized deposition of electrostatic self-assembled monodisperse and spherically uniform (250 nm) poly (styrene-methyl methacrylate-acrylic acid) photonic crystal nanospheres (P(St-MMA-AA)) was investigated. Bright iridescent coatings displaying different colors in function of the viewing angle were obtained. The SEM, diffuse reflectance spectroscopy, TGA, DSC and FTIR analyses confirm the presence of structural color and the glutaraldehyde and chitosan ability to provide durable chemical bonding between Cotton Fabric and photonic crystal (PCs) coating with the highest degradation temperature and the lowest enthalpy. The coatings are characterized by a mixture of face-centered cubic and hexagonal close-packed arrays alternating random packing regions. For the first time a cost-efficient structural coloration with high washing and light fastness using self-assembled P(St-MMA-AA) photonic crystals was successfully developed onto Woven Cotton Fabric using chitosan and/or glutaraldehyde as stabilizing agent opening new strategies for the development of dye-free coloration of textiles.
It Meng Low - One of the best experts on this subject based on the ideXlab platform.
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Mechanical properties of Cotton Fabric reinforced geopolymer composites at 200–1000 ℃
Journal of Advanced Ceramics, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, Les Vickers, It Meng LowAbstract:Geopolymer composites containing Woven Cotton Fabric (0–8.3 wt%) were Fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 °C, 400 °C, 600 °C, 800 °C and 1000 °C. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 °C, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of Cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.
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Mechanical properties of Cotton Fabric reinforced geopolymer composites at 200–1000 °C
Journal of Advanced Ceramics, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, Les Vickers, It Meng LowAbstract:Geopolymer composites containing Woven Cotton Fabric (0–8.3 wt%) were Fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 °C, 400 °C, 600 °C, 800 °C and 1000 °C. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 °C, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of Cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.
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Synthesis and mechanical properties of Cotton Fabric reinforced geopolymer composites
Composites Part B: Engineering, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, It Meng LowAbstract:Abstract Geopolymer composites reinforced with different layers of Woven Cotton Fabric are Fabricated using lay-up technique. Mechanical properties, such as flexural strength, flexural modulus, impact strength and fracture toughness of geopolymer composites reinforced with 3.6, 4.5, 6.2 and 8.3 wt% Cotton fibres are studied. The fracture surfaces of the composites are also examined using scanning electron microscopy. The results show that all the mechanical properties of the composites are improved by increasing the Cotton fibre contents. It is found that the mechanical properties of Cotton Fabric reinforced geopolymer composites are superior to pure geopolymer matrix.
Gonul Yavuz - One of the best experts on this subject based on the ideXlab platform.
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Structural coloration of chitosan coated cellulose Fabrics by electrostatic self-assembled poly (styrene-methyl methacrylate-acrylic acid) photonic crystals.
Carbohydrate Polymers, 2018Co-Authors: Gonul Yavuz, Necdet Seventekin, Andrea Zille, António Pedro SoutoAbstract:Abstract The structural coloration of a chitosan-coated Woven Cotton Fabric obtained by glutaraldehyde-stabilized deposition of electrostatic self-assembled monodisperse and spherically uniform (250 nm) poly (styrene-methyl methacrylate-acrylic acid) photonic crystal nanospheres (P(St-MMA-AA)) was investigated. Bright iridescent coatings displaying different colors in function of the viewing angle were obtained. The SEM, diffuse reflectance spectroscopy, TGA, DSC and FTIR analyses confirm the presence of structural color and the glutaraldehyde and chitosan ability to provide durable chemical bonding between Cotton Fabric and photonic crystal (PCs) coating with the highest degradation temperature and the lowest enthalpy. The coatings are characterized by a mixture of face-centered cubic and hexagonal close-packed arrays alternating random packing regions. For the first time a cost-efficient structural coloration with high washing and light fastness using self-assembled P(St-MMA-AA) photonic crystals was successfully developed onto Woven Cotton Fabric using chitosan and/or glutaraldehyde as stabilizing agent opening new strategies for the development of dye-free coloration of textiles.
Thamer Alomayri - One of the best experts on this subject based on the ideXlab platform.
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Mechanical properties of Cotton Fabric reinforced geopolymer composites at 200–1000 ℃
Journal of Advanced Ceramics, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, Les Vickers, It Meng LowAbstract:Geopolymer composites containing Woven Cotton Fabric (0–8.3 wt%) were Fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 °C, 400 °C, 600 °C, 800 °C and 1000 °C. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 °C, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of Cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.
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Mechanical properties of Cotton Fabric reinforced geopolymer composites at 200–1000 °C
Journal of Advanced Ceramics, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, Les Vickers, It Meng LowAbstract:Geopolymer composites containing Woven Cotton Fabric (0–8.3 wt%) were Fabricated using the hand lay-up technique, and were exposed to elevated temperatures of 200 °C, 400 °C, 600 °C, 800 °C and 1000 °C. With an increase in temperature, the geopolymer composites exhibited a reduction in compressive strength, flexural strength and fracture toughness. When heated above 600 °C, the composites exhibited a significant reduction in mechanical properties. They also exhibited brittle behavior due to severe degradation of Cotton fibres and the creation of additional porosity in the composites. Microstructural images verified the existence of voids and small channels in the composites due to fibre degradation.
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Synthesis and mechanical properties of Cotton Fabric reinforced geopolymer composites
Composites Part B: Engineering, 2014Co-Authors: Thamer Alomayri, Faiz U. A. Shaikh, It Meng LowAbstract:Abstract Geopolymer composites reinforced with different layers of Woven Cotton Fabric are Fabricated using lay-up technique. Mechanical properties, such as flexural strength, flexural modulus, impact strength and fracture toughness of geopolymer composites reinforced with 3.6, 4.5, 6.2 and 8.3 wt% Cotton fibres are studied. The fracture surfaces of the composites are also examined using scanning electron microscopy. The results show that all the mechanical properties of the composites are improved by increasing the Cotton fibre contents. It is found that the mechanical properties of Cotton Fabric reinforced geopolymer composites are superior to pure geopolymer matrix.
Andrea Zille - One of the best experts on this subject based on the ideXlab platform.
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Structural coloration of chitosan coated cellulose Fabrics by electrostatic self-assembled poly (styrene-methyl methacrylate-acrylic acid) photonic crystals.
Carbohydrate Polymers, 2018Co-Authors: Gonul Yavuz, Necdet Seventekin, Andrea Zille, António Pedro SoutoAbstract:Abstract The structural coloration of a chitosan-coated Woven Cotton Fabric obtained by glutaraldehyde-stabilized deposition of electrostatic self-assembled monodisperse and spherically uniform (250 nm) poly (styrene-methyl methacrylate-acrylic acid) photonic crystal nanospheres (P(St-MMA-AA)) was investigated. Bright iridescent coatings displaying different colors in function of the viewing angle were obtained. The SEM, diffuse reflectance spectroscopy, TGA, DSC and FTIR analyses confirm the presence of structural color and the glutaraldehyde and chitosan ability to provide durable chemical bonding between Cotton Fabric and photonic crystal (PCs) coating with the highest degradation temperature and the lowest enthalpy. The coatings are characterized by a mixture of face-centered cubic and hexagonal close-packed arrays alternating random packing regions. For the first time a cost-efficient structural coloration with high washing and light fastness using self-assembled P(St-MMA-AA) photonic crystals was successfully developed onto Woven Cotton Fabric using chitosan and/or glutaraldehyde as stabilizing agent opening new strategies for the development of dye-free coloration of textiles.
