林产化学与工业Issue(6)：89-97,9.DOI:10.20195/j.issn.0253-2417.2024166
木质素星型共聚物的结构特性及其在大豆胶黏剂中的应用
Characteristics of Lignin-based Star Copolymer and Its Application in Soybean Adhesives
摘要
Abstract
Corn stover lignin was used as the raw material to synthesize a lignin-based chain transfer agent(lignin-CTA)by reversible addition-fragmentation chain transfer polymerization(RAFT),then,it was performed the polymerization of acrylamide(AM)in the presence of the initiator azobisisobutyronitrile(AIBN)to prepare a lignin star copolymer(lignin-g-PAM).Subsequently,this copolymer was individually added to the soy protein isolate(SPI)-water system and the waterborne polyamide-soybean meal flour(SMF)-water system,to fabricate soy protein-based adhesives and soybean meal-based adhesives.Various methods were employed to characterize lignin-g-PAM and the resultant adhesives.The results showed that lignin-g-PAM was successfully synthesized.The longer polyacrylamide molecular chain grafted onto lignin,the better thermal properties and surface activity of the obtained lignin-g-PAM.The copolymer lignin-g-PAM exerted a significant viscosity-reducing effect on the soy protein-based adhesive,lowered its curing temperature,and improved its thermal stability.It also destroyed the functional group structures of amideⅡandⅢin soy protein.Compared with the soybean meal-based adhesive without lignin-g-PAM,the addition of lignin-g-PAM reduced the apparent viscosity of the soybean meal-based adhesive with a solid mass fraction of 44.2%from 10 000 mPa·s to 5 500 mPa·s,and improved the toughness of the resulting adhesive layer.The wet bonding strength of the prepared plywood meets the requirements of the national standard for type Ⅱ plywood.关键词
木质素共聚物/两亲性/豆粕胶黏剂/表观黏度/高固体含量Key words
lignin copolymer/amphipathy/soybean meal adhesive/apparent viscosity/high solid content分类
化学化工引用本文复制引用
MA Lin,LIU Jingyi,GAO Shishuai,WANG Guangbin,ZHANG Daihui,XU Yuzhi..木质素星型共聚物的结构特性及其在大豆胶黏剂中的应用[J].林产化学与工业,2025,(6):89-97,9.基金项目
国家自然科学基金资助项目(32201508) （32201508）
