【作者】 庞久寅； 崔海星； 孙川；

【Author】 PANG Jiu-yin, CUI Hai-xing Sun chuan (Communication Construction Engineering Academy of Beihua University, Jilin 132013,China)

【机构】 北华大学交通建筑工程学院；

【摘要】 脲醛树脂作为人造板工业的主要应用胶种,存在着游离醛含量高,胶接制品释放甲醛的问题。本研究采用角蛋白对脲醛树脂进行共聚改性,通过甲醛和尿素的摩尔比、角蛋白的添加时间及添加量等因素的确定,来合成低毒性的脲醛树脂。实验结果表明角蛋白改性脲胶的最佳工艺条件为摩尔比1.3:1,角蛋白添加时间在第三次投入尿素后,添加量以尿素质量的5%最好。通过优化合成工艺,最终得到了低毒性的改性脲醛树脂。同时由于角蛋白原料来源广泛,成本低廉,改性后的脲醛树脂的成本也得到降低。更多还原

【Abstract】 As the main adhesive types in wood-based panel industry,urea-formaldehyde has such shortcomings as high levels of free formaldehyde content and formaldehyde emission of its bonding product. In this experiment, we try to modify urea-formaldehyde resin with keratin through copolymerization reaction. Through the determination of such reaction technology as molar ratio, adding sequence of keratin and adding amount of keratin, we finally synthesized the low toxic urea resin. The results show that the optimum molar ratio is 1.3:1, the adding amount of keratin is 5% and adding keratin after the third feeding of urea is the best choice. By optimizing the synthesis process, we ultimately get the low toxicity modified urea-formaldehyde resin. At the same time, modified urea-formaldehyde resin costs have been reduced because extensive sources of keratin and low costs.更多还原