The Experts below are selected from a list of 819 Experts worldwide ranked by ideXlab platform
Devang V. Khakhar - One of the best experts on this subject based on the ideXlab platform.
-
characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane urea Clay nanocomposites and its implications on gas barrier properties
Physical Chemistry Chemical Physics, 2016Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.
-
Characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane-urea/Clay nanocomposites and its implications on gas barrier properties.
Physical Chemistry Chemical Physics, 2015Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.
Lei Jiang - One of the best experts on this subject based on the ideXlab platform.
-
Synergistic toughening of bioinspired poly(vinyl alcohol)-Clay- nanofibrillar cellulose artificial nacre
ACS Nano, 2014Co-Authors: Jianfeng Wang, Ling Lin, Qunfeng Cheng, Lei JiangAbstract:Inspired by the layered aragonite Platelet/nanofibrillar chitin/protein ternary structure and integration of extraordinary strength and toughness of natural nacre, artificial nacre based on Clay Platelet/nanofibrillar cellulose/poly(vinyl alcohol) is constructed through an evaporation-induced self-assembly technique. The synergistic toughening effect from Clay Platelets and nanofibrillar cellulose is successfully demonstrated. The artificial nacre achieves an excellent balance of strength and toughness and a fatigue-resistant property, superior to natural nacre and other conventional layered Clay/polymer binary composites.
-
Synergistic Toughening of Bioinspired Poly(vinyl alcohol)–Clay–Nanofibrillar Cellulose Artificial Nacre
2014Co-Authors: Jianfeng Wang, Ling Lin, Qunfeng Cheng, Lei JiangAbstract:Inspired by the layered aragonite Platelet/nanofibrillar chitin/protein ternary structure and integration of extraordinary strength and toughness of natural nacre, artificial nacre based on Clay Platelet/nanofibrillar cellulose/poly(vinyl alcohol) is constructed through an evaporation-induced self-assembly technique. The synergistic toughening effect from Clay Platelets and nanofibrillar cellulose is successfully demonstrated. The artificial nacre achieves an excellent balance of strength and toughness and a fatigue-resistant property, superior to natural nacre and other conventional layered Clay/polymer binary composites
Sangram K. Rath - One of the best experts on this subject based on the ideXlab platform.
-
characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane urea Clay nanocomposites and its implications on gas barrier properties
Physical Chemistry Chemical Physics, 2016Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.
-
Characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane-urea/Clay nanocomposites and its implications on gas barrier properties.
Physical Chemistry Chemical Physics, 2015Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.
Jianfeng Wang - One of the best experts on this subject based on the ideXlab platform.
-
Synergistic toughening of bioinspired poly(vinyl alcohol)-Clay- nanofibrillar cellulose artificial nacre
ACS Nano, 2014Co-Authors: Jianfeng Wang, Ling Lin, Qunfeng Cheng, Lei JiangAbstract:Inspired by the layered aragonite Platelet/nanofibrillar chitin/protein ternary structure and integration of extraordinary strength and toughness of natural nacre, artificial nacre based on Clay Platelet/nanofibrillar cellulose/poly(vinyl alcohol) is constructed through an evaporation-induced self-assembly technique. The synergistic toughening effect from Clay Platelets and nanofibrillar cellulose is successfully demonstrated. The artificial nacre achieves an excellent balance of strength and toughness and a fatigue-resistant property, superior to natural nacre and other conventional layered Clay/polymer binary composites.
-
Synergistic Toughening of Bioinspired Poly(vinyl alcohol)–Clay–Nanofibrillar Cellulose Artificial Nacre
2014Co-Authors: Jianfeng Wang, Ling Lin, Qunfeng Cheng, Lei JiangAbstract:Inspired by the layered aragonite Platelet/nanofibrillar chitin/protein ternary structure and integration of extraordinary strength and toughness of natural nacre, artificial nacre based on Clay Platelet/nanofibrillar cellulose/poly(vinyl alcohol) is constructed through an evaporation-induced self-assembly technique. The synergistic toughening effect from Clay Platelets and nanofibrillar cellulose is successfully demonstrated. The artificial nacre achieves an excellent balance of strength and toughness and a fatigue-resistant property, superior to natural nacre and other conventional layered Clay/polymer binary composites
M. Patri - One of the best experts on this subject based on the ideXlab platform.
-
characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane urea Clay nanocomposites and its implications on gas barrier properties
Physical Chemistry Chemical Physics, 2016Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.
-
Characterizing the nanoClay induced constrained amorphous region in model segmented polyurethane-urea/Clay nanocomposites and its implications on gas barrier properties.
Physical Chemistry Chemical Physics, 2015Co-Authors: Sangram K. Rath, Kathi Sudarshan, Rupesh S. Bhavsar, Ulhas K. Kharul, Pradeep K. Pujari, M. Patri, Devang V. KhakharAbstract:There has been an increasing recognition of the fact that purely geometric factors associated with Clay Platelet dispersion in a polymer matrix cannot adequately explain the barrier properties of polymer/Clay nanocomposites. The objective of the present work is to understand the nanoClay induced structural changes in a polyurethane-urea matrix and Clay dispersion at different length scales using segment-specific characterization techniques and implications of the same in gas barrier properties using He, N2 and CO2 as probe molecules. Wide angle X-ray diffraction (WAXD) and positron annihilation life time spectroscopy (PALS) studies revealed nanoClay induced alterations in the chain packing of the amorphous soft segments of the polyurethane matrix at a molecular scale of a few Angstroms. The hard segment organization and the phase morphology of the nanocomposites, spanning length scales of several nanometers, were investigated by small angle X-ray scattering (SAXS), scanning electron microscopy (SEM) and atomic force microscopy (AFM). Furthermore, the presence of a constrained amorphous region surrounding the nanoClay was confirmed from AFM, WAXD and PALS results. Several pertinent structural variables from the gas transport point of view were deduced from these characterization techniques to understand the effect of the barrier properties in tandem with the Clay dispersion morphology.