以聚乙二醇二丙烯酸酯型水凝胶(PEGDA)为基底, 制备了长程有序的表面褶皱图形, 研究了其形成机理以及调控方法。通过调控光交联加工参数, 聚合物凝胶表面出现大面积的周期图形阵列, 该阵列尺寸可以在101~103 μm之间调控, 整体图形面积可达mm至cm级。分析表明, 褶皱图形的形成主要是由于水汽蒸发过程中PEGDA水凝胶膜表面弯曲与体积压缩之间的竞争作用。

A long-range order wrinkle pattern is fabricated based on Polymerized Poly(Ethylene Glycol)-Diacrylate(PEGDA). The formation mechanism and adjustment method are studied. The large scale of cycle pattern array occurs in the surface of polymeric hydrogel according to adjusting the optical interaction processing parameters. The dimension of the pattern can be adjusted from 101-103 μm and the area of whole pattern can be an order of magnitude in millimetre or centimetre. It demonstrates that the unique performance is from the competition of the bending of skin and the compressing of bulk in the PEGDA hydrogel film.