酚化酶解木质素-环氧树脂/环氧树脂复合材料的合成及性能

王芳; 蒯君涛; 胡高铨; 高勤卫

doi:10.13801/j.cnki.fhclxb.20170401.001

酚化酶解木质素-环氧树脂/环氧树脂复合材料的合成及性能

王芳^1,2,,
蒯君涛¹,
胡高铨¹,
高勤卫^1,2

1.
南京林业大学化学工程学院, 南京 210037;
2.
南京林业大学江苏省生物质绿色燃料与化学品重点实验室, 南京 210037

基金项目: 国家林业局科学技术计划（2015-4-55）；国家自然科学基金（31200451）

详细信息

通讯作者:
王芳,博士,副教授,硕士生导师,研究方向为生物可降解聚合物基复合材料的制备E-mail:wangfang@njfu.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2016-12-29
- 修回日期: 2017-03-22
- 刊出日期: 2017-12-14

Synthesis and properties of phenolic modified enzymatic hydrolysis lignin-epoxy resin/epoxy resin composites

1.
College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;
2.
Jiangsu Key Lab of Biomass-based Green Fuels and Chemicals, Nanjing Forestry University, Nanjing 210037, China

摘要

摘要: 以酶解木质素（EHL）为原料，采用苯酚-硫酸法对其进行酚化改性，所得酚化木质素（PL）在碱性条件下，与环氧氯丙烷（ECH）合成木质素-环氧树脂（L-EP），利用FT-IR对产物进行表征。探讨单因素反应条件对酚化工艺的影响。结果表明：反应时间3.0 h、反应温度95℃、2 mol/L H₂SO₄用量为4 mL/g时，木质素的酚化效果最佳，其酚羟基含量达到4.632 mmol/g，较EHL提高42%。研究了不同L-EP添加量对L-EP/环氧E-51复合材料力学性能和热性能的影响。结果显示：L-EP的添加量为5%时，L-EP/环氧E-51复合材料的拉伸强度最好，较纯E-51提高26%；随着L-EP添加量的增加，L-EP/环氧E-51复合材料的热稳定性增强。采用非等温法分析环氧E-51和L-EP/环氧E-51复合材料的固化动力学，结果证明：L-EP对复合材料固化有一定的促进作用。
- 酶解木质素 /
- 环氧树脂 /
- 复合材料 /
- 力学性能 /
- 热性能
Abstract: With the enzymatic hydrolysis lignin (EHL) as the raw materials, and the phenol-sulfuric acid method was used to modify EHL. Under alkaline conditions, the lignin-epoxy resin (L-EP) was synthesized by phenolated lignin (PL) reacted with epichlorohydrin (ECH). The structure of EHL and its modification and the synthetic resin were analyzed by FT-IR. The effects of single factor reaction conditions on the process of phenolation were discussed. The results indicate that the effect of modification is the best under the condition of 3.0 h, 95℃ and 4 mL/g H₂SO₄ (2 mol/L), and the content of phenolic hydroxyl group reaches 4.632 mmol/g, which increases by 42% compared with EHL. The effects of different L-EP adding amount on the mechanical properties and thermal properties of L-EP/epoxy E-51 composites were investigated. The results show that the tensile strength of L-EP/epoxy E-51 composites is the best when the amount of L-EP is 5%, which increases by 26% compared with that of the pure E-51 epoxy resin. With the increase in the amount of L-EP, the thermal stability of L-EP/E-51 composites is enhanced. The non-isothermal method was used to analyze the curing kinetics of epoxy E-51 and L-EP/E-51 composites. The results reveal that L-EP has a certain effect on the curing of L-EP/epoxy resin composites.
- enzymatic hydrolysis lignin /
- epoxy resin /
- composites /
- mechanical properties /
- thermal properties