X. Wang, W. Y. Xing, X. M. Feng, B. Yu, L. Song, G. H. Yeoh and Y. Hu (2016) Enhanced mechanical and barrier properties of polyurethane nanocomposite films with randomly distributed molybdenum disulfide nanosheets. Journal/Composites Science And Technology 127 142-148. [In English]
Web link: http://dx.doi.org/10.1016/j.compscitech.2016.02.029
Keywords: ,Polymer-matrix composites (PMCs), Mechanical properties, Thermal, properties, ELECTRICAL-CONDUCTIVITY, POLYMER NANOCOMPOSITES, EXFOLIATED MOS2, SINGLE-LAYER, COMPOSITES

Abstract: Lithium intercalated molybdenum disulfide (LixMoS2) was synthesized using a simple one-step solvothermal technique, followed by the formation of few-layer suspension of chemically exfoliated molybdenum disulfide (c-MoS2) in aqueous solution. The c-MoS2 was introduced into the waterborne polyurethane (WPU) emulsions to obtain the nanocomposite films by a simple blending method. As a comparison, MoS2/WPU composite film was prepared by directly blending bulk MoS2 particles into WPU. The incorporation of chemically exfoliated MoS2 significantly enhanced the thermal stability and mechanical properties of WPU film: with the incorporation of 4 wt% of c-MoS2, the 5% mass loss temperature of WPU nanocomposite film was increased by 30 degrees C relative to neat WPU, the tensile strength and Young's modulus were increased by 140% and 85%, respectively. Furthermore, the moisture permeability coefficient was reduced by about 37% at a MoS2 content of 4 wt%. These results demonstrate that such a facile and rapid technique presented herein will provide an effective and promising strategy to design and fabricate high barrier MoS2/polymer nanocomposite films. (C) 2016 Published by Elsevier Ltd.