Design, Preparation and Characterisation of Polyurethane Nanocomposites Membranes for Apparel Applications.

Breathable waterproof membranes protect the wearer from the climate and potential hazards. The membrane must be waterproof yet breathable to maintain comfort to the wearer. Previously the inclusion of layered silicates and graphene oxide (GO) have been shown to improve mechanical properties of polyurethane (PU) however, limited studies have been conducted on montmorillonite (MMT) and GO's impact on breathability, waterproofness and microporosity of PU membranes. This research project in conjunction with a sponsoring company, PIL Membranes LTD, aims to fill that void in knowledge. The effects of MMT and GO on both monolithic and microporous PU membranes for applications in outdoor wear will be investigated. Specific interest, due to the nature of the membrane's application, will focus on the nanofillers effect on mechanical properties (storage modulus & Young's modulus), surface roughness, wettability, breathability, and waterproofness. The MMT nanofiller C20 dispersed well in both monolithic and microporous PU membranes, often providing modest improvements to a range of properties including, breathability, surface roughness and static dissipative.