西南林业大学学报2024，Vol.44Issue(11)：1-7,7.DOI:10.11929/j.swfu.202406041
环氧树脂增强苯酚-尿素-乙二醛共缩聚树脂的粘接性能研究
Study on the Bonding Properties of Phenol-urea-glyoxal Copolycondensation Resin Reinforced by Epoxy Resin
摘要
Abstract
In order to improve the bonding properties and water resistance of glyoxal-based resin adhesive,a new EPR-PUG multi-component cocondensation resin adhesive was synthesized using epoxy resin(EPR),phenol(P),urea(U)and glyoxal(G)as raw materials.The basic properties,curing properties,and bonding proper-ties of the resins were investigated to determine the effect of P/U/G molar ratio on the properties of the resin ad-hesive and the optimum synthetic formula.The structure and synthesis mechanism of the EPR-PUG resin adhes-ive were analyzed by contact angle,fourier infrared spectroscopy(FT-IR),nuclear magnetic resonance carbon spectroscopy(13C NMR)and X-ray photoelectron spectroscopy(XPS).The results showed that the functional groups of the raw materials were crosslinked effectively,and a dense network structure was formed among the molecules,which improved the overall performance of the resin adhesive system.Under the conditions of P/U/G molar ratio of 0.1∶1.0∶1.5,reaction pH of 4-5,reaction temperature of 70-80 ℃,reaction time of 3 h,and EPR mass fraction of 13％,the adhesive has the best performance.The dry/wet strength was 2.48 MPa,1.33 MPa(cold water),0.72 MPa(63 ℃ hot water),respectively,which meets the requirements of the national standard for class Ⅱ plywood and does not release formaldehyde.关键词
乙二醛基树脂/共缩聚/无甲醛胶黏剂/粘接性能Key words
glyoxal-based resin/copolycondensation/formaldehyde-free adhesive/bonding property分类
农业科技引用本文复制引用
邓书端,李智,苟倩,茶联红,王婷,杜官本..环氧树脂增强苯酚-尿素-乙二醛共缩聚树脂的粘接性能研究[J].西南林业大学学报,2024,44(11):1-7,7.基金项目
云南省基础研究重点项目(202301AS070043)资助 （202301AS070043）
高等学校学科创新引智计划项目(D21027)资助 （D21027）
杜官本院士工作站(YSZJGZZ-2020052)资助 （YSZJGZZ-2020052）
云南省农林联合重点项目(202401BD070001-029)资助 （202401BD070001-029）
国家级大学生创新创业训练计划项目资助. （）
