• 文献标题:   Graphene oxide supramolecular hybrid hydrogels based on host guest assembled electrostatic cross-linker
  • 文献类型:   Article
  • 作  者:   XU C, ZHANG XZ, LIU SM
  • 作者关键词:   cucurbituril, hostguest chemistry, graphene oxide, electrostatic interaction, supramolecular hydrogel
  • 出版物名称:   COLLOIDS SURFACES APHYSICOCHEMICAL ENGINEERING ASPECTS
  • ISSN:   0927-7757 EI 1873-4359
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1016/j.colsurfa.2023.131017 EA FEB 2023
  • 出版年:   2023

▎ 摘  要

Non-covalent self-assembly of multi-components is a promising strategy for constructing supramolecular hydrogels. However, it remains challenging to achieve the multi-responsiveness to external stimuli for supramolecular hydrogels through a low-molecular-weight hydrogelator. Herein, we report a host guest complex as low-molecular-weight hydrogelator for constructing graphene oxide (GO)-based supramolecular hybrid hydrogels. A 1:2 homoternary complex (CB[8]center dot NMAH(2)(+)) was formed through host guest encapsulation of two protonated naphthalen-2-ylmethanamine (NMAH(+)) molecules in cucurbit[8]uril (CB[8]) host and worked as dynamically assembled electrostatic cross-linker in the presence of GO. The resulted GO hydrogels showed shearthinning, self-healing properties, and were stimuli-responsive to pH and competing guests. The proposed concept of "assembled electrostatic cross-linker" (AEC) would be extended to construct other novel stimuli-responsive supramolecular materials.