• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Design of melt-recyclable poly(ε-caprolactone)-based supramolecular shape-memory nanocomposites
【24h】

Design of melt-recyclable poly(ε-caprolactone)-based supramolecular shape-memory nanocomposites

机译：基于熔融可回收的聚（ε-己内酯）的超分子形状记忆纳米复合材料的设计

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A novel poly(epsilon-caprolactone) (PCL) supramolecular network exhibiting shape-memory behavior was successfully constructed with pendant UPy units that are highly able to dimerize. The dynamic network was obtained by a simple and versatile strategy consisting of chain-extension reaction between α,ω-dihydroxyoligoPCL and hydroxylated UPy units in the presence of hexamethylene diisocyanate as a coupling agent and further intermolecular dimerization of the UPy along the polyurethane backbone. ~(1) H NMR analyses confirmed the dynamic features of the system, and DMTA in tensile mode was investigated to assess the SMP properties. Recyclability was also assessed by taking advantage of these supramolecular networks. Further addition of cellulose nanocrystals into the polymer network enabled adjustment of the extent of the net-points and therefore the SMP features. As confirmed by dispersion tests in solution and SEM observations, these bio-based nanofillers were homogeneously distributed in the network via supramolecular interaction between the hydroxyl groups present on their surface and UPy moieties along the polyurethane backbone. Thus, the here developed nanomaterials might reveal applicability in areas where a combination of SMP and biocompatibility is needed.
机译：新型聚ε-己内酯（PCL）超分子网络表现出形状记忆行为已成功构建了具有高度二聚性的UPy侧链单元。通过简单，通用的策略获得动态网络，该策略包括在存在六亚甲基二异氰酸酯作为偶联剂的情况下，α，ω-二羟基寡聚PCL和羟基化的UPy单元之间的链延长反应，以及沿着聚氨酯骨架进一步UPy的分子间二聚。 〜（1）H NMR分析证实了该系统的动态特性，并研究了拉伸模式下的DMTA来评估SMP性能。还利用这些超分子网络对可回收性进行了评估。将纤维素纳米晶体进一步添加到聚合物网络中，可以调节网点的范围，从而调节SMP特征。如溶液和SEM观察中的分散测试所证实，这些生物基纳米填料通过其表面上存在的羟基与沿聚氨酯骨架的UPy部分之间的超分子相互作用而均匀分布在网络中。因此，这里开发的纳米材料可能显示出在需要SMP和生物相容性相结合的领域中的适用性。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号