Micropore Geometry Manipulation by Macroscopic Deformation Based on Shape Memory Effect in Porous PLLA Membrane and its Enhanced Separation Performance

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 on...

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Bibliographic Details
Published in:ACS applied materials & interfaces 2017-12, Vol.9 (50), p.43415-43419
Main Authors: Zhao, Jingxin, Yang, Qiucheng, Wang, Tao, Wang, Lian, You, Jichun, Li, Yongjin
Format: Article
Language:English
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Summary: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.
ISSN:1944-8244
1944-8252
DOI:10.1021/acsami.7b16648