摘要
以聚乙二醇400为主液化试剂,丙三醇为辅助液化剂,浓硫酸为催化剂对酶解木质素进行液化,得到了酶解木质素液化多元醇,将其替代部分苯酚与甲醛合成了改性酚醛树脂胶粘剂。采用红外光谱对酶解木质素液化多元醇和改性胶粘剂的结构进行了表征和分析,并对胶粘剂的性能进行了测定。结果表明,当酶解木质素液化多元醇替代苯酚的质量分数为10%-25%时,胶粘剂的固含量、pH值、胶合强度、游离醛含量和游离酚含量都能满足国标GB 9846.1-12-88的要求,且液化多元醇添加量增大时,固含量升高,pH值降低,湿强度先降低而后增大,干强度先增大而后快速降低。
Enzymatic hydrolysis lignin （EHL） was liquefied in the mixed solvents of polyethylene glycol （PEG） 400 and glycerol at 130 ℃with sulfuric acid as a catalyst agent to get EHL-polyol. Then EHL-POtyol was used to synthesize modified phenol-formaldehyde resin （PF）. EHL-POlyol and modified PF resin were characterized by FT- IR. The viscosity, solid content, free＇ phenol content, free formaldehyde content and bonding strength were investigated. The results show that the solid .content, pH value, bonding strength, free phenol content and free formaldehyde content of the EHL-polyol modified PF resin meet the demands of National Standard GB 9846.1 - 12 - 88 when 5%--25% phenol was replaced by EHL-POlyol. When the content of EHL-polyol increases, the solid content increases, pH value decreases, the wet strength first decreases and then increases, and the dry strength first increases and then reduces quickly.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第5期5-8,共4页
Polymer Materials Science & Engineering
基金
福州大学科技发展基金(2012-XQ-1)
福州大学科研启动项目
关键词
酶解木质素
液化
多元醇
酚醛树脂
胶粘剂
enzymatic hydrolysis lignin
liquefaction
polyol
phenolic formaldehyde resin
adhesives
