The Experts below are selected from a list of 261 Experts worldwide ranked by ideXlab platform
Shaobing Zhou - One of the best experts on this subject based on the ideXlab platform.
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multi stimulus responsive shape memory polymer nanocomposite network cross linked by cellulose nanocrystals
ACS Applied Materials & Interfaces, 2015Co-Authors: Ying Li, Xiaotong Zheng, Guang Yang, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart bioma...
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Multi-stimulus-responsive shape-memory polymer nanocomposite network cross-linked by cellulose nanocrystals
ACS Applied Materials and Interfaces, 2015Co-Authors: Ye Liu, Xiaotong Zheng, Guang Yang, Ying Li, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart biomaterial.
Yongping Gao - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and properties of thermoreversible crosslinking supraMolecular polymer with weak multiple-hydrogen bonds and small chemical network sites from dimer acid, diamine and sulfonyl isocyanate
Journal of Polymer Research, 2011Co-Authors: Yujie Chen, Huang Jiang, Jiawei Wang, Wei Wu, Yongping GaoAbstract:Thermoreversible crosslinking supraMolecular polymers with weak hydrogen bonds were prepared from fatty dimer acids, diamines and sulfonyl isocyanate. The oligomers as backbones of supraMolecular polymers have Low Molecular Weights (5-7 repeating units). The hydrogen-bonding networks behave like elastic polymers with high rubber plateaus at high storage modulus, and have Low melting temperature that is favoring the Low temperature processing. The addition of sulfonyl isocyanate introduces the sulfonyl urethane groups (-O-CO-NH-SO 2) that increase the diversity of self-complementary hydrogen bonds. However, the large bulk of sulfonyl groups (O∈=∈S∈=∈O) prolongs the distance of hydrogen bonds. The supromolecuar polymer with small chemical network sites has higher tensile length and T m between the suproMolecular polymers with sulfonyl groups. © 2011 Springer Science+Business Media B.V.
Ying Li - One of the best experts on this subject based on the ideXlab platform.
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multi stimulus responsive shape memory polymer nanocomposite network cross linked by cellulose nanocrystals
ACS Applied Materials & Interfaces, 2015Co-Authors: Ying Li, Xiaotong Zheng, Guang Yang, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart bioma...
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Multi-stimulus-responsive shape-memory polymer nanocomposite network cross-linked by cellulose nanocrystals
ACS Applied Materials and Interfaces, 2015Co-Authors: Ye Liu, Xiaotong Zheng, Guang Yang, Ying Li, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart biomaterial.
Yujie Chen - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and properties of thermoreversible crosslinking supraMolecular polymer with weak multiple-hydrogen bonds and small chemical network sites from dimer acid, diamine and sulfonyl isocyanate
Journal of Polymer Research, 2011Co-Authors: Yujie Chen, Jiawei Wang, Wei Wu, Huang JiangAbstract:Thermoreversible crosslinking supraMolecular polymers with weak hydrogen bonds were prepared from fatty dimer acids, diamines and sulfonyl isocyanate. The oligomers as backbones of supraMolecular polymers have Low Molecular Weights (5–7 repeating units). The hydrogen-bonding networks behave like elastic polymers with high rubber plateaus at high storage modulus, and have Low melting temperature that is favoring the Low temperature processing. The addition of sulfonyl isocyanate introduces the sulfonyl urethane groups (−O-CO-NH-SO2) that increase the diversity of self-complementary hydrogen bonds. However, the large bulk of sulfonyl groups (O = S = O) prolongs the distance of hydrogen bonds. The supromolecuar polymer with small chemical network sites has higher tensile length and Tm between the suproMolecular polymers with sulfonyl groups.
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Synthesis and properties of thermoreversible crosslinking supraMolecular polymer with weak multiple-hydrogen bonds and small chemical network sites from dimer acid, diamine and sulfonyl isocyanate
Journal of Polymer Research, 2011Co-Authors: Yujie Chen, Huang Jiang, Jiawei Wang, Wei Wu, Yongping GaoAbstract:Thermoreversible crosslinking supraMolecular polymers with weak hydrogen bonds were prepared from fatty dimer acids, diamines and sulfonyl isocyanate. The oligomers as backbones of supraMolecular polymers have Low Molecular Weights (5-7 repeating units). The hydrogen-bonding networks behave like elastic polymers with high rubber plateaus at high storage modulus, and have Low melting temperature that is favoring the Low temperature processing. The addition of sulfonyl isocyanate introduces the sulfonyl urethane groups (-O-CO-NH-SO 2) that increase the diversity of self-complementary hydrogen bonds. However, the large bulk of sulfonyl groups (O∈=∈S∈=∈O) prolongs the distance of hydrogen bonds. The supromolecuar polymer with small chemical network sites has higher tensile length and T m between the suproMolecular polymers with sulfonyl groups. © 2011 Springer Science+Business Media B.V.
Guang Yang - One of the best experts on this subject based on the ideXlab platform.
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multi stimulus responsive shape memory polymer nanocomposite network cross linked by cellulose nanocrystals
ACS Applied Materials & Interfaces, 2015Co-Authors: Ying Li, Xiaotong Zheng, Guang Yang, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart bioma...
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Multi-stimulus-responsive shape-memory polymer nanocomposite network cross-linked by cellulose nanocrystals
ACS Applied Materials and Interfaces, 2015Co-Authors: Ye Liu, Xiaotong Zheng, Guang Yang, Ying Li, Shaobing ZhouAbstract:In this study, we developed a thermoresponsive and water-responsive shape-memory polymer nanocomposite network by chemically cross-linking cellulose nanocrystals (CNCs) with polycaprolactone (PCL) and polyethylene glycol (PEG). The nanocomposite network was fully characterized, including the microstructure, cross-link density, water contact angle, water uptake, crystallinity, thermal properties, and static and dynamic mechanical properties. We found that the PEG[60]–PCL[40]–CNC[10] nanocomposite exhibited excellent thermo-induced and water-induced shape-memory effects in water at 37 °C (close to body temperature), and the introduction of CNC clearly improved the mechanical properties of the mixture of both PEG and PCL polymers with Low Molecular Weights. In addition, Alamar blue assays based on osteoblasts indicated that the nanocomposites possessed good cytocompatibility. Therefore, this thermoresponsive and water-responsive shape-memory nanocomposite could be potentially developed into a new smart biomaterial.
