戊二醛交联碱木质素/聚乙烯醇膜的制备及其光学性能  

Preparation and Optical Properties of Glutaraldehyde Crosslinked Alkali Lignin/PVA Films

作　　者：苏玲[1] 任世学[1] 方桂珍[1] 

机构地区：[1]东北林业大学材料科学与工程学院,黑龙江哈尔滨150040

出　　处：《生物质化学工程》2013年第3期1-5,共5页Biomass Chemical Engineering

基　　金：国家林业局公益性行业专项(201204803;200904072);中央高校基本科研业务费专项资金资助(DL09BB10)

摘　　要：以碱木质素和聚乙烯醇(PVA)为原料,以戊二醛为交联剂利用流延法制备了碱木质素/PVA交联反应膜。通过单因素实验考查了碱木质素加入量、戊二醛加入量对木质素/PVA反应膜光学性能的影响。采用SEM和FT-IR方法分析反应膜的表面形貌和化学结构,紫外可见光谱法分析了交联膜的光学性能。结果表明:当碱木质素和聚乙烯醇质量比为1∶10,戊二醛加入量1.67%,薄膜的透光率和吸光度都较好。碱木质素/PVA薄膜结构中有醚键生成,碱木质素和PVA发生了交联反应;碱木质素/PVA反应薄膜表面较光滑;加入碱木质素后,薄膜在紫外光区的吸光度提高了近90%,在可见光区的透过率降低了近40%,碱木质素对薄膜的吸光度和透过率影响较大;戊二醛的加入量增多可见光区透过率有所增大,但戊二醛对薄膜在紫外区吸光度变化不大,薄膜的紫外线吸收主要是受碱木质素的影响。碱木质素/PVA反应膜可作为良好的紫外吸收材料。With alkali lignin（L） and polyvinyl alcohol （PYA） as primary material, glutaraldehyde as crosslinker, alkali lignin/ PVA cross-linked reaction film was prepared by casting. The process conditions were determined by single-factor test. The reaction film was characterized by FT-IR and SEM. The optical performance of reaction films was investigated by UV-Vis spectrophotometer. The results showed that when mass ration of alkali ligini/PVA was 1/10, glutaraldehyde content was 1.67 % （w/w） of the dry matter. The reaction film had good optical performance. Crosslinking reaction took place and the structure of ether bond was formed between alkali lignin and PVA. The surface of reaction films was smooth. After adding alkali lignin, UV absorbance of the reaction films was increased nearly 90% and in the visible area transmissivity was decreased about 40%. Alkali lignin had a great influence on films of absorbance and transmissivity. The more glutaraldehyde, the higher transmissivity of the reaction films in the visible area. The influence of glutaraldehyde on UV absorbance of the reaction films was not obvious. The UV absorbance is influenced mainly by alkali lignin. Alkali lignin/PVA can be used as a good ultraviolet absorption material.

关 键 词：碱木质素 聚乙烯醇 交联 光学性能 

分 类 号：TB383.2[一般工业技术—材料科学与工程]