摘要
以豆粕为原料,经热机械螺旋挤压法预处理后,用戊二醛对其进行交联改性,考察了pH、温度及戊二醛用量对胶粘剂胶合强度的影响,并对最佳参数制备的胶粘剂进行了性能表征。结果表明:螺旋挤压处理温度140℃、pH 8、温度50℃、戊二醛用量1.0%(豆粕质量为基准)时,豆粕胶的干、湿态胶合强度均最佳,分别为3.92和1.41 MPa,达到Ⅱ类胶合板的国家标准。与未改性的豆粕胶相比,戊二醛改性后的豆粕胶粘剂固含量、黏度及热稳定性均显著提高。
Soybean meal was modified by the thermomechanical spiral extrusion method,and then crosslinked with glutaraldehyde to obtain the soybean meal adhesive.The effects of pH,temperature,and glutaraldehyde content on the glue shear strength were investigated,and the properties of the prepared soybean meal adhesive were characterized.The results showed that,when the screw extrusion temperature was kept at 140℃,and the reaction pH,temperature,and glutaraldehyde content were 8,50℃and 1.0%(based on the weight of soybean meal),respectively,the obtained soybean meal glue exhibited 3.92 MPa of dry glue shear strength and 1.41 MPa of wet glue shear strength,which can meet the national standard of Class Ⅱ plywood.Meanwhile,compared with the unmodified soybean meal glue,the glutaraldehyde-modified soybean meal adhesive possessed significantly improved solid content,viscosity and thermal stability.
作者
孙柯璇
崔玉明
陈慧
李飞
袁鸿昌
SUN Kexuan;CUI Yuming;CHEN Hui;LI Fei;YUAN Hongchang(College of Biomass Science and Engineering,Sichuan University,Chengdu 610065,China;National Engineering Laboratory for Clean Technology of Leather Manufacture,Sichuan University,Chengdu 610065,China;Dazhu Luyuan Wood Industry Technology Co.Ltd,Dazhu 635100,China;Guizhou Tongren No.1 Middle School,Tongren 554300,China)
出处
《皮革科学与工程》
CAS
北大核心
2023年第4期11-16,共6页
Leather Science and Engineering
基金
2021年度四川大学—达州市人民政府校市战略合作专项资金项目科技创新研发项目(2021CDDZ-03)。
关键词
豆粕
螺旋挤压
交联改性
胶合强度
soybean meal
spiral extrusion
crosslinking modification
glue shear strength
