期刊
ADVANCED MATERIALS
卷 34, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202108243
关键词
hysteresis-free materials; nanoparticle composites; polymer hydrogels; resilient hydrogels
类别
资金
- National Natural Science Foundation of China [51773209, 21704106]
- National Basic Research Program [2017YFC1103300]
- Army Research Office [W911NF-17-1-0003]
This research successfully achieved a hysteresis-free material by using a low-crosslink-density polyacrylamide hydrogel with hyperbranched silica nanoparticles. These resilient hydrogels exhibit fatigue-free characteristics under large deformations and can accurately detect dynamic deformations.
The elastic storage and release of mechanical energy has been key to many developments throughout the history of mankind. Resilience, absent hysteresis, has been an elusive goal to achieve, particularly at large deformations. Using a low-crosslink-density polyacrylamide hydrogel at 96% water content having hyperbranched silica nanoparticles (HBSPs) as the major junction points, a hysteresis-free material is realized. The fatigue-free characteristic of these composite hydrogels is evidenced by the invariance of the stress-strain curves at strain ratios of 4, even after 5000 cycles. At a strain ratio of 7, only a 1.3% hysteresis is observed. A markedly increased strain-ratio-at-break of 11.5 is observed. The unique attributes of these resilient hydrogels are manifested in the high-fidelity detection of dynamic deformations under cyclic loading over a broad range of frequencies, difficult to achieve with other materials.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据