loading page

Measurement of diffusion constant on the cross-section of PVA films under free swelling condition with a facile device
  • +8
  • Meiling Gao,
  • Xiang long Wan,
  • Shengfa Lai,
  • Xihui Chen,
  • Fei Zeng,
  • Kaiqiang Hu,
  • Zhibo Chen,
  • Yanfeng Qian,
  • Hao Cui,
  • Jianghui Zhu,
  • Guoxin Ding
Meiling Gao
Anhui University of Science and Technology
Author Profile
Xiang long Wan

Corresponding Author:[email protected]

Author Profile
Shengfa Lai
Anhui University of Science and Technology
Author Profile
Xihui Chen
Anhui University of Science and Technology
Author Profile
Fei Zeng
Anhui University of Science and Technology
Author Profile
Kaiqiang Hu
Anhui University of Science and Technology
Author Profile
Zhibo Chen
Anhui University of Science and Technology
Author Profile
Yanfeng Qian
Anhui University of Science and Technology
Author Profile
Hao Cui
Anhui University of Science and Technology
Author Profile
Jianghui Zhu
Heidelberg University
Author Profile
Guoxin Ding
Anhui University of Science and Technology
Author Profile

Abstract

Diffusion coefficient always attracts more attention because of its prediction for diffusion in a glassy polymer. However, most of the direct measurements of diffusion coefficients are time-consuming, expensive and system intrusive. Here, we report a facile method to measure apparent diffusion constant on the cross-section of thin PVA film with a device, which is structured with a thin conductive film, employed diffusion and the solution conductivity theory well. The diffusion time and the conductivity of the device are determined by the process of solution passing through the cross-section of thin PVA film and reaching the conductive substrate. The data detected the apparent diffusion constant in diffusion and the concentration gradient of the solution on the interface between the PVA film and conductive film. This device provides a simple, rapid and effective way to study the apparent diffusion constant in PVA film.