期刊论文

Preparation and Characterization of Urea-Dialdehyde Starch-Formaldehyde Copolycondensation Resin Adhesive

Wu, Y.

中文

材料导报

1005-023X

2020

34

8

8172-8178

10.11896/cldb.19070137

湖南省科技重大专项(2017NK1010) 中南林业科技大学大学生科技创新项目。

本校为第一且通讯机构

为扩大淀粉的应用领域和减小脲醛树脂胶黏剂游离甲醛的含量,采用双醛淀粉与尿素、甲醛进行共缩聚反应,制得尿素-双醛淀粉-甲醛(UDSF)共缩聚树脂胶黏剂。考察了双醛淀粉用量、第一次共缩聚时间和第一次尿素比例(F /U1)对胶黏剂固体含量、黏度、水溶性、固化时间和游离甲醛含量的影响。并通过与尿素-淀粉-甲醛(USF)进行对比,得出双醛淀粉用量为0.075 mol,第一次共缩聚时间为60 min和F /U1为1.5时,所制得的UDSF树脂胶黏剂的使用操作性能较好、固化速率较快、环保性能较优、胶合强度和耐水性满足Ⅱ类胶合板要求。利用傅里叶变换红外光谱(FTIR) 、扫描电子显微镜(SEM)和热重测试仪(TGA)对UDSF树脂胶黏...

In order to expand the application field of starch and reduce the free formaldehyde content of urea-formaldehyde resin adhesive, urea-dialdehyde starch-formaldehyde (UDSF) copolycondensation resin adhesive was prepared by copolycondensation of dialdehyde starch with urea and formaldehyde. The effects of the amount of dialdehyde starch, the first copolymerization time and the first urea ratio (F/U1) on the solid content, viscosity, water solubility, curing time and free formaldehyde content of the adhesives were investigated. By comparing with u...