College of Material, Chemistry and Chemical Engineering, Hangzhou Normal University , No. 16 Xuelin Rd., Hangzhou 310036, P. R. China.
ACS Appl Mater Interfaces. 2017 Dec 20;9(50):43415-43419. doi: 10.1021/acsami.7b16648. Epub 2017 Dec 11.
An effective strategy to tailor the microporous structures has been developed based on the shape memory effect in porous poly(l-lactic acid) membranes in which tiny crystals and amorphous matrix play the roles of shape-fixed phase and reversible-phase, respectively. Our results indicate that not only PLLA membranes but micropores exhibit shape memory properties. The proportional deformations on two scales have been achieved by uniaxial or biaxial tension, providing a facile way to manipulate continuously the size and the orientation degree of pores on microscale. The enhanced separation performance has been validated by taking polystyrene colloids with varying diameters as an example.
基于具有形状记忆效应的多孔聚（L-乳酸）（PLLA）膜，开发了一种有效的微孔结构定制策略，其中微小晶体和无定形基质分别充当形状固定相和可逆相。我们的结果表明，不仅 PLLA 膜，而且微孔都表现出形状记忆特性。通过单轴或双轴拉伸实现了两个尺度上的比例变形，为在微尺度上连续操纵孔的尺寸和取向度提供了一种简便的方法。以不同直径的聚苯乙烯胶体为例，验证了增强的分离性能。
