文献类型：期刊文献

英文题名：Improved surface properties of a novel self-healing polyurethane-acrylate coating by in situ polymerizations of dihydroxy organo-montmorillonite on ancient wood

作者：Chen, Yongping[1] Zhang, Tao[2] Zhong, Huixian[1] Liu, Ru[1] Xu, Jianfeng[1]

第一作者：陈勇平

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, Haidian, 100091, China; [2] Beijing Academy of Cultural Heritage, Beijing, Dongcheng, 100061, China

年份：2022

卷号：172

外文期刊名：Progress in Organic Coatings

收录：EI(收录号：20223512627679);Scopus(收录号：2-s2.0-85136318052)

基金：This study was financially supported by the Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes (No. CAFYBB2019SY033 ) and the National Key Research and Development Program of China (No. 2020YFC1522402 ). The authors would like to thank all the reviewers who participated in the review, as well as MJEditor ( www.mjeditor.com ) for providing English editing services during the preparation of this manuscript.

语种：英文

外文关键词：Clay minerals - Coatings - Polymerization - Polyurethanes - Self-healing materials - Wood

摘要：A novel polyurethane-acrylate (PUA) polymerized in situ with montmorillonite (MMT) was synthesized to improve the surface properties of self-healing coatings used for ancient wood. For better dispersion and interaction, natural MMT was initially modified to dihydroxy organo-montmorillonite (OMMT). The prepared self-healing PUA coatings were painted on ancient wood and the surface properties tested, characterized, and compared to pure PUA and natural MMT-added PUA. Those results showed that natural MMT was modified to dihydroxy OMMT by cation exchange. The dihydroxy OMMT was polymerized in situ during synthesis by reactions between –OH and –NCO groups. The PUA polymer incorporated within MMT to form an exfoliated structure. After painting ancient wood, the surface contained no obvious bulges and the roughness increased slightly. Due to OMMT addition, the adhesion and hardness of OMMT modified PUA increased to 1 class and 2H, respectively, which is acceptable for indoor woodenware. The abrasive resistance was also improved. Furthermore, dihydroxy OMMT promoted the self-healing of PUA. After 30 s of healing, damages disappeared. ? 2022