摘要
利用疏水性单体甲基丙烯酸缩水甘油酯(GMA)接枝改性大豆蛋白以期获得耐水性较好的大豆蛋白胶粘剂。大豆蛋白(SP)经过3 mo.lL-1尿素溶液预处理变性后,以GMA为接枝单体,过硫酸铵-亚硫酸氢钠(APS-NaH-SO3)氧化还原体系为引发体系,通过自由基聚合合成接枝改性大豆蛋白胶粘剂。用红外表征纯接枝物,结果表明接枝成功;研究了预处理时间、反应时间、引发剂加入量、单体加入量、反应温度对接枝改性大豆蛋白胶粘剂的粘接强度和耐水性的影响。结果说明接枝反应的确能够提高耐水性,并确定了最佳的反应条件。得出较佳的反应条件为:wsp4 g,wGMA3.39 g,wNaHSO30.2 g,wAPS:0.44 g,反应时间3 h,反应温度70℃。
The hydrophobic monomer GMA was grafted onto soy protein （SP）in order to obtain the much better water-resistant SP adhesives. The graft eopolymer of SP- g- PGMA was prepared by free radical polymerization with APS- NaHSO3 redox system as initiator after SP was pretreated by 3 mol · L^-1 urea solution which was as a denaturing agent. Pure grafted polymer was analyzed by IR indicating the suceess of grafting. Effect of different reaction conditions on grafted SP adhesives＇ shear strength and water resistance, sneh as pretreatment time, reaction time, addition of initiator, addition of monomer, reaction temperature were studied. The experiment illustrated that grafting reaetion can improve the water resistance of SP adhesives, and the optimal reaetion conditions was determined, and these reaetions were ：4 g wsp, 3.39 g wGMA ,0.2 g wNaHSO3 ,0.44g wAPS ,3 h of reaction time and 70℃ reaction temperature.
出处
《大豆科学》
CAS
CSCD
北大核心
2008年第6期1032-1036,共5页
Soybean Science
基金
国家自然科学基金资助项目(NSFC50673038)
