聚合物
材料科学
纳米颗粒
化学工程
机械强度
聚合物网络
离子强度
退火(玻璃)
解吸
高分子化学
纳米技术
复合材料
化学
有机化学
吸附
水溶液
工程类
作者
Eiji Kamio,Masayuki Minakata,Hinako Nakamura,Atsushi Matsuoka,Hideto Matsuyama
出处
期刊:Soft Matter
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:18 (25): 4725-4736
被引量:6
摘要
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.
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