玉米秸秆酶解木质素的化学结构及在环氧树脂中的应用

发布时间：2018-01-05 20:35

本文关键词：玉米秸秆酶解木质素的化学结构及在环氧树脂中的应用　出处：《华南理工大学学报(自然科学版)》2016年11期 　论文类型：期刊论文

【摘要】：采用紫外光谱、红外光谱、元素分析、顶空气相色谱和电位滴定法研究了玉米秸秆酶解木质素的化学结构,发现酶解木质素芳香环上取代基较多,β-O-4等结构断裂程度不大,结构单元主要为H型单元,甲氧基、酚羟基和羧基含量分别为6.50%、0.48%和2.46%.将此木质素与环氧树脂共混制备酶解木质素/环氧树脂复合材料,发现:一定用量范围内的酶解木质素可提高复合材料的拉伸强度和弯曲强度;木质素用量增大时,复合材料耐热性能提高;温度为460℃时,掺2.0%酶解木质素的环氧树脂复合材料的残余量为8.3%,而纯环氧树脂的残余量为4.4%.文中结果表明,酶解木质素可提高环氧树脂的力学性能和耐热性能,在环氧树脂中具有较好的应用前景.
[Abstract]:By using ultraviolet spectroscopy, infrared spectroscopy, elemental analysis, chemical structure by headspace gas chromatography and potentiometric titration of enzymatic hydrolysis of corn stover lignin, found that enzymatic hydrolysis lignin aromatic ring substituents are beta -O-4 structure fracture degree is small, the main structural units for the H type unit, methoxy phenol the content of hydroxyl and carboxyl groups were 6.50%, 0.48% and 2.46%. of the lignin and epoxy resin were prepared by enzymatic hydrolysis lignin / epoxy resin composite material, found that certain dosage range of enzymatic hydrolysis lignin can improve the tensile strength and bending strength of the composite; the lignin content increased, improve the thermal properties of composite materials; temperature is 460 degrees centigrade, the residual amount of epoxy resin composite material of lignin with 2% enzyme was 8.3%, and the residual amount of pure epoxy resin for 4.4%. in this paper. The results showed that enzymatic hydrolysis lignin can improve the mechanical properties of epoxy resin and The heat-resistant property has a good application prospect in epoxy resin.

【作者单位】：华南理工大学化学与化工学院∥制浆造纸工程国家重点实验室;华南理工大学轻工科学与工程学院;
【基金】：国家重点基础研究发展计划项目(2012CB215302) 国家自然科学基金资助项目(21376100) 国家国际科技合作专项(2013DFA41670)~~
【分类号】：O636.2;TQ323.5
【正文快照】： 酶解木质素是从木质纤维原料酶解制备功能性双酚A型环氧树脂是一类含有苯环羟基、醚多糖、燃料乙醇等的残渣中提取得到的天然高分子基、环氧基团的合成高分子聚合物,具有优异的粘接材料[1-2].与传统的亚硫酸盐或碱法制浆生成的工强度,介电性能良好,硬度高,耐腐蚀性强,被广泛应

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