Properties of wheat straw soda lignin of different molecular weights and its influence on properties of LPF adhesive

刘纲勇; 邱学青; 杨东杰

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Properties of wheat straw soda lignin of different molecular weights and its influence on properties of LPF adhesive

更新时间：2025-12-10

- Properties of wheat straw soda lignin of different molecular weights and its influence on properties of LPF adhesive
- CIESC Journal Issue 6, Pages: 1590-1594(2008)
- 作者机构：
  
  1. 广东食品药品职业学院
  2. 华南理工大学化工与能源学院
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 June 2008，
  
  Published：05 June 2008
- 稿件说明：
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刘纲勇, 邱学青, 杨东杰. Properties of wheat straw soda lignin of different molecular weights and its influence on properties of LPF adhesive[J]. CIESC Journal, 2008, (6): 1590-1594.
DOI：

刘纲勇, 邱学青, 杨东杰. Properties of wheat straw soda lignin of different molecular weights and its influence on properties of LPF adhesive[J]. CIESC Journal, 2008, (6): 1590-1594. DOI：

摘要

应用超滤分级方法，将麦草碱木素分成3种不同分子量范围的级分。分析表明：随着分子量的降低，麦草碱木素的甲氧基含量降低，酚羟基含量升高，其反应活性随之升高;同时，羧基含量降低，其溶液表面活性升高。进一步实验结果表明，随着麦草碱木素分子量的降低，LPF胶的胶黏强度升高，游离甲醛含量和黏度降低，综合性能提高。

Abstract

The wheat straw soda lignin (WSSL) was fractionated by means of ultrafiltration

and 3 fractions of different molecular weights were collected.It was shown that with the decrease in molecular weight of WSSL

the content of methoxyl group decreased and the content of phenolic hydroxyl group increased

resulting in increased reactivity of WSSL

while the content of carboxyl group decreased

resulting in increased surface activity of WSSL solution.The results showed that with the decrease in molecular weight of WSSL

the adhesive strength of lignin phenol formaldehyde (LPF) adhesive increased

the formaldehyde content and viscosity decreased

and the comprehensive properties of LPF adhesive were improved.

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