离子液体中通过ATRP法制备大豆蛋白胶黏剂

Preparation of Soy Protein Adhesive by ATRP Method in Ionic Liquid

为提高大豆蛋白胶黏剂的胶合强度,在离子液体(1-丁基-2,3-二甲基咪唑氯盐[BDMIM][Cl])中,采用原子转移自由基聚合(ATRP)法将甲基丙烯酸缩水甘油酯(GMA)接枝到大豆蛋白分子主链,制备大豆蛋白胶黏剂。对原料大豆蛋白进行预处理,采用红外光谱和核磁氢谱对大豆蛋白结构和大豆蛋白接枝共聚物进行表征,并通过正交试验确定优化工艺条件。结果表明:改性胶黏剂的优化工艺参数为GMA 140 mL,CuBr(溴化亚铜)147.2 mg,油浴时间3 h,在此条件下制备的胶黏剂胶合强度达到1.44 MPa,符合国家标准GB/T 9846—2015Ⅱ类胶合板要求。

In order to improve the bonding strength of soybean protein adhesive,atom transfer radical polymerization(ATRP)was used in ionic liquid(1-butyl-2,3-dimethylimidazole chloride salt[BDMIM][Cl])to graft glycidyl methacrylate onto the main chain of soybean protein molecules to prepare a soybean protein adhesive.The raw soy protein was pretreated,and the degree of expansion of the soy protein structure was analyzed by infrared spectroscopy and hydrogen nuclear magnetic spectroscopy.The best preparation conditions was determined by orthogonal experiments.The results showed that the best process parameters were as follow:the modified adhesive GMA 140 mL,CuBr 147.2 mg,and oil bath time 3 h.The adhesive strength of the adhesive prepared under these conditions reached 1.44 MPa,which could meet the national standard GB/T 9846—2015 Type II plywood requirements.