高压电场处理杉木与脲醛/酚醛树脂的胶合界面性能及其机理  

Bonding behavior and mechanism of Chinese fir and urea-/phenol-formaldehyde resin treated by high voltage electric field

作　　者：何倩 侯倩倩 王相军 张岱远 詹天翼 卢晓宁 杨鼎宜[1] 李胜才[1] HE Qian;HOU Qianqian;WANG Xiangjun;ZHANG Daiyuan;ZHAN Tianyi;LU Xiaoning;YANG Dingyi;LI Shengcai(School of Architectural Science and Engineering,Yangzhou University,Yangzhou 225127,China;School of Electrical and Energy Power Engineering,Yangzhou University,Yangzhou 225127,China;School of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China)

机构地区：[1]扬州大学建筑科学与工程学院,江苏扬州225127 [2]扬州大学电气与能源动力工程学院,江苏扬州225127 [3]南京林业大学材料科学与工程学院,南京210037

出　　处：《扬州大学学报（自然科学版）》2023年第4期61-66,共6页Journal of Yangzhou University：Natural Science Edition

基　　金：江苏省博士后科研资助项目(2021K474C);江苏省高等学校自然科学研究面上资助项目(22KJB560032);扬州市绿扬金凤人才资助项目.

摘　　要：基于高压电场处理方法,研究了杉木和胶黏剂活化程度、脲醛/酚醛树脂反应行为、动态润湿行为以及木质复合材料的胶合性能等.结果表明,在高压电场作用下,杉木与胶黏剂活化程度、脲醛/酚醛树脂交联反应程度均显著提高,两种树脂的活化程度差异性主要由官能团类型、分子排布形式和极化程度不同引起.高压电场作用下,脲醛和酚醛树脂在杉木表面的吸收率分别降低了25.33%和24.21%,其复合材料的胶合界面强度分别提高了70%和28%.这主要是由于杉木和胶黏剂分子的活化、极化程度提高,增加了胶黏剂与杉木之间化学反应位点,使胶黏剂在杉木表面的扩散和渗透行为随之改变,进而提高了交联程度.Based on the high voltage electric field treatment method,the activation degree of Chinese fir and adhesive,the reaction behavior of urea-/phenol-formaldehyde resin,their dynamic wetting behavior and bonding property of wood composites are investigated.The results show that the activation degree of Chinese fir with adhesive,and the crosslinking reaction degree of urea-/phenol-formaldehyde resin are all significantly improved under the high voltage electric field.The differences in the activation degree of the two resins are mainly due to the difference types of functional groups,the molecular arrangement and the degree of polarization.Under the action of high voltage electric field,the absorption rates of urea-formaldehyde and phenol-formaldehyde resin on Chinese fir surface decrease by 25.33%and 24.21%,respectively.At the same time,the bonding strength of Chinese fir with urea-formaldehyde and phenol-formaldehyde composites increase by 70%and 28%,respectively.This is mainly due to the improvement of activation and polarization of Chinese fir and resin,which increases the chemical reaction sites between the resin and wood,changes the diffusion and penetration behavior of the resin on the wood surface,and then improves their cross-linking degree.

关 键 词：木质复合材料 胶合强度 杉木 酚醛树脂 脲醛树脂 高压电场 

分 类 号：TU531.2[建筑科学—建筑技术科学]