西南林业大学学报2018，Vol.38Issue(1)：180-184,5.DOI:10.11929/j.issn.2095-1914.2018.01.028
处理单宁改性脲醛树脂性能研究
Performance of the Preprocessed Tannin Modified UF
摘要
Abstract
The pretreated tannin was used to modify the UF resin in this study. The different adding stages and amounts of tannin were studied,the DSC and the 13C-NRM were used to analyze the structure of the resins. The re-sults showed that adding 7% of tannin at the acid stage to modify the UF resin had the best effect. By this way,the free formaldehyde content of the resin reduced 58%. The 24 h absorbing water thickness expansion rate of particle board made by this kind resin was 11.6%,it reduced 37% compared with unmodified ones. The addition reaction and polycondensation reaction were hindered by the tannin,so if the tannin was added too much,the free formalde-hyde content of the modified resin would be higher than the unmodified ones.关键词
脲醛树脂/单宁改性/刨花板Key words
UF/tannin modified/particleboard分类
农业科技引用本文复制引用
张本刚,席雪冬,吴志刚,雷洪,杜官本,王辉..处理单宁改性脲醛树脂性能研究[J].西南林业大学学报,2018,38(1):180-184,5.基金项目
国家自然科学基金地区基金项目(31660176)资助 （31660176）
贵州省教育厅项目(黔教合KY字[2017]114号)资助 （黔教合KY字[2017]114号）
贵州省林业厅项目(黔林科合[2017]14号)资助 （黔林科合[2017]14号）
云南省国际科技合作项目(2014IA017)资助. （2014IA017）
