基于漆酶的木质素改性及木质素基酚醛树脂胶黏剂制备的研究  

Laccase-based modification of lignin and preparation of lignin-based phenolic resin adhesive

作　　者：王子帅 庄军平[1] 武书彬[1] 刘颖[1] 黄睿 WANG Zi-shuai;ZHUANG Jun-ping;WU Shu-bin;LIU Ying;HUANG Rui(State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《现代化工》2025年第4期130-135,共6页Modern Chemical Industry

基　　金：国家重点研发计划(2022YFC2805104)。

摘　　要：利用漆酶对木质素进行改性,以改性木质素为原料制备高性能木质素酚醛树脂胶黏剂。研究了漆酶改性对木质素官能团及分子质量的影响,进一步优化漆酶改性的工艺参数。结果表明,以漆酶Lac15改性的木质素替代苯酚与甲醛反应制备漆酶改性木质素基酚醛树脂胶黏剂(LLPF),苯酚替代率达70%。经漆酶改性的木质素分子质量降低18.9%,甲氧基质量分数下降24.46%,酚羟基质量分数略微下降,整体反应活性提高。在相同工艺条件下制备的LLPF胶黏剂干、湿态胶合强度可达2.11、1.82 MPa,与木质素酚醛树脂(LPF)相比分别提高了42.5%和40.0%。Lignin is modified by laccase,and then used to prepare high-performance lignin-based phenolic resin adhesive.The impact of laccase modificationon functional groups and molecular weight of lignin are studied,and the process parameters of laccase modification are further optimized.Results indicate that lignin modified by laccase Lac15 is used to replace phenol to react with formaldehyde to prepare laccase-modified lignin-based phenolic resin adhesive(LLPF),showing a phenol substitution rate of 70%.The molecular weight of laccase-modified lignin is 18.9%lower than that of original lignin,the methoxy group content is 24.46%lower,the phenolic hydroxyl group content is slightly less,and the overall reactivity becomes higher.The dry and wet bonding strength of LLPF adhesive prepared under the same process conditions reach 2.11 MPa and 1.82 MPa,respectively,which are 42.5%and 40.0%respectively than those of lignin-based phenolic resin(LPF).

关 键 词：漆酶改性 木质素 酚醛树脂 胶黏剂 胶合强度 

分 类 号：TQ430[化学工程]