文献类型：期刊文献

英文题名：Composite waterborne polyurethane reinforced with silane modified lignin as an adhesive between polypropylene decorative films and wood-based panels

作者：Chang, Liang[1] Luo, Shupin[1] Gao, Li[1] Ren, Yiping[1] Tang, Qiheng[1] Chen, Yongping[1]

第一作者：常亮

通信作者：Chang, L[1]

机构：[1]Chinese Acad Forestry, Res Inst Wood Ind, Haidian, Peoples R China

年份：2022

卷号：62

期号：6

起止页码：1950-1958

外文期刊名：POLYMER ENGINEERING AND SCIENCE

收录：;EI(收录号：20221411884727);Scopus(收录号：2-s2.0-85127376620);WOS:【SCI-EXPANDED(收录号:WOS:000777207700001)】；

基金：This work was supported by the Special Fund of Chinese Central Government for Basic Scientific Research Operations in Commonweal Research Institutes (NO. CAFYBB2021ZB004). The authors would like to thank all the reviewers who participated in the review and MJEditor () for its linguistic assistance during the preparation of this manuscript.

语种：英文

外文关键词：plywood; polypropylene decorative film; sodium lignosulfonate; surface bonding strength; waterborne polyurethane composites

摘要：To improve the surface bonding strength of polypropylene (PP) decorative films on wood-based panels, one kind of lignin, namely sodium lignosulfonate (SL) filled waterborne polyurethane (WPU) composites were used as adhesives on the back of the PP decorative films, and the SL was modified by the addition of two alternative types of silane that contain either ethylene-acyloxy or epoxy groups. The PP decorative films were hot-press onto plywood using the different types of SL modified WPU as an adhesive. The SL and SL modified WPU were characterized comprehensively. The surface properties the PP decorative films on plywood surfaces were tested. The results showed that both types of silane can be grafted on the SL between hydrolyzed Si-OH groups and -OH groups. The long organic chain of silane can physically twist to the WPU, where self-polymerization of the silane helps to form network structures. As a result, the surface bonding strength of PP decorative films on plywood surfaces largely improved with SL filled WPU adhesives and no detachment occurred in boiling water. Compared with the ethylene-acyloxy silane, the epoxy silane performed better which was associated with the reactions between the epoxy groups and free water.