形状记忆聚合物表面微结构及黏附性能的可逆调控

doi:10.7503/cjcu20160181

高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (7): 1351.doi: 10.7503/cjcu20160181

形状记忆聚合物表面微结构及黏附性能的可逆调控

吕通¹, 成中军²(), 来华¹, 张恩爽¹, 刘宇艳¹()

1. 哈尔滨工业大学化工与化学学院, 新能源转换与储存关键材料技术工业和信息化部重点实验室,2. 哈尔滨工业大学基础与交叉科学研究院, 哈尔滨 150001

收稿日期:2016-03-25 出版日期:2016-07-10 发布日期:2016-06-27
基金资助:
国家自然科学基金(批准号: 21304025, 51573035)资助

Shape Memory Polymer Surface with Tunable Microstructure and Adhesion^†

LÜ Tong¹, CHENG Zhongjun^2,^*(), LAI Hua¹, ZHANG Enshuang¹, LIU Yuyan^1,^*()

1. Ministry of Industry and Information Technology Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, 2. Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150001, China

Received:2016-03-25 Online:2016-07-10 Published:2016-06-27
Contact: CHENG Zhongjun,LIU Yuyan E-mail:chengzhongjun@iccas. ac. cn;liuyy@hit.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.21304025, 51573035)

摘要/Abstract

摘要：

采用模板法在形状记忆聚合物表面构筑了微纳米等级结构, 获得了一种具有低黏附性的超疏水表面. 在外压作用下, 表面微结构发生坍塌, 失去超疏水性, 同时呈高黏附性. 在120 ℃热处理后, 表面微结构恢复到原始状态, 同时表面恢复到低黏附状态. 通过外压及热处理过程可实现对表面微结构及其黏附性能的可逆调控. 研究结果表明, 表面不同的微结构状态赋予了表面不同的黏附性能, 即在原始表面上, 液滴处于低黏附的Cassie态, 而在坍塌结构表面上水滴处于高黏附的Wenzel态.

关键词: 形状记忆聚合物, 表面微结构, 浸润性, 黏附性

Abstract:

A low adhesive superhydrophobic surface with shape memory microstructures was prepared by the template method. It was found that under the external pressure, the surface would lose the superhydrophobicity for the destroyed microstructures, and meanwhile, the surface became high adhesive. After heating the surface at 120 ℃, both surface microstructures and the low adhesive superhydrophobicity can be recovered. The results indicate that the adhesive property can be controlled reversibly by controlling the surface microstructures. Different microstructures results in different wetting states, as a result, the surface shows different adhsions. On the original surface, water droplet resides in the low adhesive Cassie state, while on the crushed surface, the droplet resides in the high adhesive Wenzel state.

Key words: Shape memory polymer, Surface microstructure, Wettability, Adhesion

TrendMD:

吕通, 成中军, 来华, 张恩爽, 刘宇艳. 形状记忆聚合物表面微结构及黏附性能的可逆调控. 高等学校化学学报, 2016, 37(7): 1351.

LÜ Tong, CHENG Zhongjun, LAI Hua, ZHANG Enshuang, LIU Yuyan. Shape Memory Polymer Surface with Tunable Microstructure and Adhesion^†. Chem. J. Chinese Universities, 2016, 37(7): 1351.

图/表 5

Fig.1 SEM images of Ni template with different magnifications

Fig.2 SEM images of surface of the as-prepared template(A, B), the surface after pressing(C) and heating(D) treatment (B) magnification of (A).

Fig.3 Confocal microscopy images of surfaces at different state(A) Original state; (B) crushed state after pressing; (C) restored state after heating; (D—F) the profile pictures corresponding to (A)—(C), respectively.

Fig.4 Shapes of a water droplet on the surface at different states(A) The original state; (A') a water droplet can roll on the original surface with a sliding angle of about 9°; (B) the curshed state after pressing; (B') a water droplet is pinned on the surface with crushed microstructure; (C) the restored state after heating; (C') a water droplet can roll again on the restored surface with a sliding angle of about 10°.

Fig.5 Force-distance curves for surface at different states(A—C) and force-cycle number relation after pressing and heating(D)(A) The original state; (B) the crushed state after pressing; (C) restored state after heating; (D) the adhesive force between the surface and a water droplet can be changed by reversibly as the surface microstructures changed alternately.

参考文献 20

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形状记忆聚合物表面微结构及黏附性能的可逆调控

Shape Memory Polymer Surface with Tunable Microstructure and Adhesion^†

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形状记忆聚合物表面微结构及黏附性能的可逆调控

Shape Memory Polymer Surface with Tunable Microstructure and Adhesion†

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Shape Memory Polymer Surface with Tunable Microstructure and Adhesion^†