Preparation of lignin/TiO2 nanocomposites and their application in aqueous polyurethane coatings
作者机构：School of Chemistry and Chemical Engineering South China University of Technology Guangzhou 510640 China State Key Laboratory of Pulp and Paper Engineering South China University of Technology Guangzhou 510640 China
出 版 物：《Frontiers of Chemical Science and Engineering》 (化学科学与工程前沿（英文版）)
年 卷 期：2019年第13卷第1期
页 面：59-69,F0004页
核心收录：
学科分类：08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
基 金：the National Natural Science Foundation of China (Grant Nos. 21436004 and 21706082) the Science and Technology Program of Guangzhou (201707020025) the Fundamental Research Funds for the Central Universities (D2174110) Guangdong Province Science Foundation for Cultivating National Engineering Research Center for Efficient Utilization of Plant Fibers (2017B090903003) for the financial support.
主 题：lignin TiO2 nanocomposite particle polyurethane film
摘 要：A simple method using a water soluble lignin quaternary ammonium salt (LQAS) and TiO2 has been developed for the preparation of lignin/TiO2 nanocomposites in an aqueous medium under mild conditions. The LQAS/TiO2 nanocomposites contain well-dispersed small particles with excellent ultraviolet (UV) shielding abilities and good compatibilities with waterborne polyurethane (WPU). When the LQAS/TiO2 nanocomposites were blended with WPU, the UV absorbance and the tensile ductility of the WPU increased significantly. The composite WPU hybrid film containing 6 wt-% LQAS/TiO2 nanocomposite had the highest visible light transmittance and had excellent ultraviolet aging properties. After 192 h of UV light irradiation, the tensile strength of the composite film was above 8 MPa and the elongation at break was 800%. This work highlights new possibilities for the utilization of alkali lignin.
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