• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Materials Research >Double-layer hydrogel with photoresponsive shape memory features for controllable catalysis
【24h】

Double-layer hydrogel with photoresponsive shape memory features for controllable catalysis

机译：双层水凝胶，具有光响应的形状记忆功能，可控制催化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A photoresponsive double-layer hydrogel has been developed, in which light-sensitive cinnamic moieties are grafted onto a polyacrylamide network to produce a photoresponsive layer and pure polyacrylamide formed the supporting layer. Ag nanoparticles were dispersed using in situ reduction on the photoresponsive layer to act as the catalyst. The as-fabricated hydrogel exhibits a shape memory effect and controllable catalytic behavior under an external light stimulus. When exposed to ultraviolet (UV) light at lambda 260 nm, the resulting cycloaddition of cinnamic moieties not only fix the hydrogel's temporary shape, but also greatly slow down the catalytic reaction rate. After irradiated with UV light at lambda 260 nm, however, the newly formed crosslinking points are reversibly cleaved. This results in the shape recovery of the hydrogel to its permanent shape. At the same time, the catalytic reaction was greatly accelerated because of the facile diffusion of the reactants into the hydrogel.
机译：已经开发了一种光响应的双层水凝胶，其中将光敏肉桂化部分接枝到聚丙烯酰胺网络上，以产生光反应层层和形成支撑层的纯聚丙烯酰胺。使用原位还原在光反馈层上分散Ag纳米颗粒以用作催化剂。在外部光刺激下，制造的水凝胶表现出形状记忆效应和可控的催化性能。当暴露于紫外线（UV）灯时在λ> 260nm时，所得肉桂加成的环加成不仅固定水凝胶的临时形状，而且大大减慢了催化反应速率。然而，在λ<260nm处用UV光照射后，新形成的交联点是可逆的裂解。这导致水凝胶的形状回收到其永久形状。同时，由于反应物进入水凝胶的体扩散，催化反应大大加速。

著录项

  • 来源
    《Journal of Materials Research》 |2019年第10期|1795-1804|共10页
  • 作者

    Leng Jinghang; Li Shujing; Yang Mingxin; Hu Jie;

  • 作者单位

    Jiangsu Univ Sch Mat Sci & Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Beijing Technol & Business Univ Key Lab Cosmet China Natl Light Ind Beijing 100048 Peoples R China;

    Jiangsu Univ Sch Mat Sci & Engn Zhenjiang 212013 Jiangsu Peoples R China;

    Jiangsu Univ Sch Mat Sci & Engn Zhenjiang 212013 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    composite; catalytic; polymer;

    机译：复合;催化;聚合物;

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