Chemical Journal of Chinese Universities ›› 2020, Vol. 41 ›› Issue (11): 2538-2544.doi: 10.7503/cjcu20200485

• Polymer Chemistry • Previous Articles     Next Articles

Reversible Regulation of Droplet Directional/anti-directional Rolling on Superhydrophobic Shape Memory Microarray Surface

WANG Wu, LAI Hua, CHENG Zhongjun(), LIU Yuyan()   

  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,Harbin Institute of Technology,Harbin 150001,China
  • Received:2020-07-23 Online:2020-11-10 Published:2020-11-06
  • Contact: CHENG Zhongjun E-mail:chengzhongjun@iccas.ac.cn;liuyy@hit.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(21674030)

Abstract:

Superhydrophobic shape memory microarray with upright structure was fabricated by 3D printing, template molding and surface modification. The upright and tilted structure of the microarray can be controlled reversibly based on the polymer’s shape memory ability. With the change of microarray structure, the rolling state of droplets on the microarray surface can also be changed. The droplet shows anti-directional transport on the upright microarray, that is, the rolling angle of droplet moving toward both sides of the array is consistent. However, on the tilted microarray, the droplet shows directional sliding, that is, the rolling angle of the droplet along the bending direction of the array is smaller than that against the bending direction of the microarray. Therefore, the microarray achieves reversible regulation of droplet directional/anti-directional rolling.

Key words: Superhydrophobicity, Shape memory, Microarray, Reversible regulation

CLC Number: