Gridded Fibers’ Restricted Melting Strategy for Gas Permeance and Binding Enhancement of the ePTFE/PPS Filter

Abstract

In this work, a high-gas-permeance expanded polytetrafluoroethylene/gridded fibers/polyphenylene sulfide (ePTFE/GF/PPS) filter was developed by embedding the gridded fibers as the interlayer to restrict the melting diffusion behavior of poly(phenylene sulfide) (PPS). The influence of gridded fibers with different melting temperatures on the air permeance, composite fastness, and heat tolerance was investigated. The results show that copolyamide (PA) gridded fiber with low melting temperature can weaken the effect of PPS melting so as to increase the air permeance of the ePTFE/PPS filter by 32%, which is suitable for low-temperature environments below 160 °C. The ePTFE/PAN/PPS membrane had an 8% increase in air permeance while maintaining the overall performance stable, with a heat tolerance of 200 °C. Poly(vinyl alcohol) (PVA) with a melting temperature close to that of PPS as the interlayer exhibited enhanced fastness as a compensation for the lower air permeance because of co-melting. All of the filters showed filtration efficiencies of above 99.99% and filtration resistances below 210 Pa in the particulate matter (PM) filtration experiment. The successful introduction of the gridded fiber as the intermediate layer provides a new perspective to design a composite filter with high gas permeance.

Introducing the I&ECR Virtual Collection of Industrial and Industrially Relevant Research (2022–2023)

“…Engineering chemistry related to Materials and Interfaces is another strong topic area for I&ECR . Here, studies in the collection include a novel methodology of improving polyphenyl sulfide (PPS)-based membranes selected as ACS Editors’ Choice in June 2023, an improvement of lubricant oil properties using carbon nanomaterials, synthetic strategies to prepare γ-alumina by coprecipitation (a cover article in January 2023) and FeNi particles by spray pyrolysis, , the impact of pressure and temperature on sorption of gases by fluoroelastomers, methodologies to improve polymer/clay composite design, novel carbonaceous materials for Li batteries, and a study of rigid polyurethane foam Ostwald ripening from a third member of the 2022 Class of Influential Researchers …”