Multi-Stimulus-Responsive Shape-Memory Polymer Nanocomposite Network Cross-Linked by Cellulose Nanocrystals
Multi-Stimulus-Responsive Shape-Memory Polymer Nanocomposite Network Cross-Linked by Cellulose Nanocrystals
复制标题
纤维素纳米晶交联的多刺激响应形状记忆聚合物纳米复合网络
DOI：
10.1021/am5081056
复制
发表时间：
2015-02-25
影响因子：
9.5
通讯作者：
Zhou, Shaobing
中科院分区：
文献类型：
--
作者：
Liu, Ye;Li, Ying;Zhou, Shaobing
在这项研究中，我们开发了一个温度响应和水响应的形状记忆聚合物纳米复合网络化学交联纤维素纳米晶体（CNCs）与聚己内酯（PCL）和聚乙二醇（PEG）。对纳米复合材料的微观结构、交联密度、水接触角、吸水率、结晶度、热性能以及静态和动态力学性能进行了表征。我们发现PEG[60]-PCL[40]-CNC[10]纳米复合材料在37 ℃（接近体温）的水中表现出优异的热诱导和水诱导形状记忆效应，并且CNC的引入明显改善了具有低分子量的PEG和PCL聚合物的混合物的机械性能。此外，基于成骨细胞的Alcohol blue测定表明，纳米复合材料具有良好的细胞相容性。因此，这种温度响应和水响应的形状记忆纳米复合材料有可能发展成为一种新型的智能生物材料。
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 degrees 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.