Design and Optimization of a Permeation Testing System for Polymer Coatings

Published

August 8, 2011

Author(s)

Adrian E. Verwolf

Abstract

Measurements of liquid permeation through freestanding Parylene C membranes were made using a high- performance testing system, which demonstrated fast response (≤ 30 seconds) to changing concentrations in the sweep gas stream and detectability of less than 20 mPa of water vapor. The bulk of the maximum measured transport rates through Parylene C were attained within 30 minutes of injecting water into the feed side of the dry test cell. The characteristic time-transport rate curves were similar to those produced via water vapor fed directly into the sweep-gas stream from a novel in situ water vapor diffusion reference membrane. Average values of diffusivity D measured at 37 °C ranged from 8.1e-9 to 8.8e-9 cm2/s. The implications of experimental results are discussed with respect to transient permeation for medical device coating applications specifically and metrology generally.

Proceedings Title

Materials and Processes for Medical Devices 2011

Conference Dates

August 8-10, 2011

Conference Location

Minneapolis, MN

Pub Type

Conferences

Keywords

permeation, Parylene C, medical devices, polymer coatings

Citation

Verwolf, A. (2011), Design and Optimization of a Permeation Testing System for Polymer Coatings, Materials and Processes for Medical Devices 2011, Minneapolis, MN (Accessed April 24, 2024)