Shi Fu-Kuan, Wang Xi-Ping, Guo Ruo-Hai, Zhong Ming, Xie Xu-Ming
Key Laboratory of Advanced Materials (MOE), Department of Chemical Engineering, Tsinghua University, Beijing, 100084, PR China.
J Mater Chem B. 2015 Feb 21;3(7):1187-1192. doi: 10.1039/c4tb01654h. Epub 2015 Jan 21.
Highly stretchable and super tough nanocomposite physical hydrogels (NCP gels) were fabricated by a facile and one-pot process. NCP gels show superior mechanical properties with tensile strength of 73 kPa-313 kPa and elongation at break of 1210-3420%. This is due to the effective strengthening mechanism: under stretching, the intermolecular hydrogen bonds can dynamically break and recombine to dissipate energy and homogenize the gel network. In addition, vinyl hybrid silica nanoparticles (VSNPs) can work as stress transfer centres to transfer stress to the grafted polymer chains.
通过一种简便的一锅法制备了具有高拉伸性和超强韧性的纳米复合物理水凝胶（NCP凝胶）。NCP凝胶表现出优异的机械性能，拉伸强度为73 kPa至313 kPa，断裂伸长率为1210 - 3420%。这归因于有效的增强机制：在拉伸过程中，分子间氢键可以动态断裂并重新结合以耗散能量并使凝胶网络均匀化。此外，乙烯基杂化二氧化硅纳米颗粒（VSNP）可以作为应力传递中心，将应力传递到接枝的聚合物链上。
