自愈水凝胶
材料科学
石墨烯
剪切(物理)
纳米技术
氧化物
复合材料
高分子化学
冶金
作者
Jingyu Ma,Senpeng Lin,Yanqiu Jiang,Peng Li,Hengjie Zhang,Zhen Xu,Huaping Wu,Pengcheng Lin,Josef Breu,Weiwei Gao,Chao Gao
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-01-17
卷期号:14 (2): 2336-2344
被引量:21
标识
DOI:10.1021/acsnano.9b09503
摘要
Designing anisotropic architectures enables the creation of soft materials with rich properties and functions to artificially simulate the evolutionary diversity of biology. In the important liquid crystalline hybrid (LCH) hydrogels, free manipulation of liquid crystalline order in high accuracy and efficiency has been long pursued to design properties and functions but remains a challenge. Here, we realize digital programing LC order in graphene oxide LCH hydrogels in high size resolution (∼20 μm) and efficiency by using shearing microlithography. The localized shear-induced LC order organization is immobilized by cross-linking gelation, and we prepare graphene oxide LCH hydrogels with digital programmed patterns in a large area. The shearing order generates a vertical alignment of graphene oxide sheets in hydrogels and a considerable mechanical anisotropy controlled by the shearing angle and interval spacing. By diversely organizing geometry of LC order, the mechanical response behaviors of LCH hydrogels are designed to exhibit localized deformations, steered cracking, and programmable swelling actuations. Our work offers a versatile avenue to scalably digital program LCH hydrogels in a high efficiency and accuracy. The digital designed hydrogel promises wide uses in actuators, bioscaffolds, biomimetic materials, and soft designer materials.
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