Open AccessIn situ investigation of formation kinetics of microporous structure in PVDF thin films prepared via thermally‐induced phase separation (TIPS): Effects of film thickness and polymer concentration
Author(s) -
Yang Bin,
Yu Yangnan,
Pan Yang,
Wang Shuqing,
Xu Xiang,
Wang Yingying,
Qian Jiasheng,
Xia Ru,
Zhang Peng,
Shi You,
Tu Youlei
Publication year - 2021
Publication title -
nano select
Language(s) - English
Resource type - Journals
ISSN - 2688-4011
DOI - 10.1002/nano.202000304
Subject(s) - microporous material , materials science , microstructure , kinetics , diluent , chemical engineering , polymer , phase (matter) , fabrication , thin film , crystallization , composite material , nanotechnology , organic chemistry , chemistry , physics , quantum mechanics , engineering , medicine , alternative medicine , pathology
In this research, series of PVDF microporous films with various polymer concentrations and thickness were prepared through thermally‐induced phase separation in air condition with diphenyl carbonate as the diluent. Effects of polymer concentration and film thickness on the formation kinetics of microporous structure of PVDF thin films were in situ investigated via TII technique. The instantaneous heat conduction inside the films during film formation was also evaluated. Two types of parameter models were adopted in order to disclose the time and location dependence of TIPS film solidification kinetics, respectively. Hierarchical microstructures, crystallization behavior and thermal properties of the TIPS films were also characterized by SEM, DSC, and TGA, respectively. The current study could supply an insight into the fabrication of PVDF microporous films with target microstructure and desirable performance.