Tough ion gels composed of coordinatively crosslinked polymer networks using ZIF-8 nanoparticles as multifunctional crosslinkers
Tough ion gels composed of coordinatively crosslinked polymer networks using ZIF-8 nanoparticles as multifunctional crosslinkers
复制标题
由使用 ZIF-8 纳米颗粒作为多功能交联剂的配位交联聚合物网络组成的坚韧离子凝胶
DOI：
10.1039/d2sm00410k
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发表时间：
2022
期刊：
影响因子：
3.4
通讯作者：
Matsuyama Hideto
中科院分区：
文献类型：
--
作者：
Kamio Eiji;Minakata Masayuki;Nakamura Hinako;Matsuoka Atsushi;Matsuyama Hideto
通过可逆相互作用构建交联聚合物网络是恢复受损凝胶机械强度的一种有前途的方法。此外，通过设计有效的可逆交联，凝胶的机械强度可以通过基于交联被施加的力破坏的能量耗散来增强。在这项研究中，我们介绍了沸石咪唑框架-8纳米粒子（ZIF-8 NPs），它作为多功能交联剂，提供多点配位键合与聚（N，N-二甲基丙烯酰胺）为基础的聚合物网络在含有离子液体的凝胶。凝胶的机械强度随着ZIF-8 NP的含量增加至6重量%而增加。证实了加载到凝胶上的能量通过聚合物网络从ZIF-8 NP的表面解吸而消散。由于聚合物网络和ZIF-8纳米颗粒之间的配位交联的可逆破坏和重建，通过退火，受损凝胶的机械强度几乎完全恢复。
Constructing crosslinked polymer networks via reversible interactions is a promising approach to recover the mechanical strength of damaged gels. In addition, by designing effective reversible crosslinks, the mechanical strength of the gel can be enhanced through energy dissipation based on the destruction of the crosslinks by an applied force. In this study, we introduced zeolitic imidazole framework-8 nanoparticles (ZIF-8 NPs), which acted as multifunctional crosslinkers, to provide multipoint coordination bonding with a poly(N,N-dimethylacrylamide)-based polymer network in a gel containing an ionic liquid. The mechanical strength of the gel increased with an increase in the content of ZIF-8 NPs up to 6 wt%. It was confirmed that the energy loaded onto the gel was dissipated through the desorption of the polymer network from the surface of the ZIF-8 NPs. Owing to the reversible destruction and reconstruction of the coordinative crosslinking between the polymer network and ZIF-8 NPs, the mechanical strength of the damaged gel was almost fully recovered through annealing.