耐水胶合板用环保乳清蛋白基水性胶粘剂  

Environmentally safe aqueous adhesive prepared using whey proteins for water-resistant plywood

作　　者：王文波[1] 赵宗严[2] 高振华[2] 郭明若[1] 

机构地区：[1]美国佛蒙特大学农业与生命学院 [2]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《粘接》2010年第9期50-54,共5页Adhesion

摘　　要：乳清蛋白是干酪加工过程中所产生的一种副产品,除被用作食品添加剂外,仍有相当数量乳清蛋白并未得到有效利用。为了实现乳清蛋白的高附加值利用,本文以乳清蛋白为原料,研制了具有良好耐久性和环保的乳清蛋白基胶合板用水性胶粘剂,并评价了变性处理、改性剂种类及其用量对乳清胶粘剂的胶合性能及游离甲醛释放量的影响。结果表明,热变性使乳清蛋白胶粘剂的胶接耐久性提高;不同改性剂对乳清蛋白胶粘剂的性能影响不同。采用1%多异氰酸酯改性胶接耐久性最好;采用0.15%戊二醛/1%乙二醛改性胶接强度最高。中试结果表明,所研制的耐水性环保乳清蛋白基胶合板胶粘剂的干胶接强度达到1.98MPa,煮-烘-煮28h后湿胶接强度为1.14MPa,游离甲醛释放量仅为0.035mg/L(干燥器法),达到了JISK6806—2003环保结构胶合板用胶粘剂要求。Whey protein is a by-product of cheese processing. Whey protein is still under utilized even through it has been used as food ingredients. In order to apply whey proteins in other fields, this study investigated the effects of denaturation, modifier species and content on the bond strength and the free formaldehyde release of plywood panels, by which optimized an environmentally safe wheyprotein adhesive for water resistant plywood. The results indicated that the denaturation improves the water resistance of the plywood panel The modifier species had various effects on the panel performance, i.e., the adhesive modified with 1% MDI showed the best water resistance while the adhesive modified with the mixture of 0.15% glutaraldehyde and 1% glyoxal showed the best bond strength. The scale-up test confirmed that the plywood panels bonded with the whey-protein based adhesive had dry bond strength of 1.98 MPa, wet bond strength of 1.14 MPa （after 28 h boiling-dry-boiling treatment）, and free formaldehyde release of 0.035 mg/L （Desiccator method）.

关 键 词：水性胶粘剂 乳清蛋白 胶合板 改性 

分 类 号：TQ436.5[化学工程]