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酶处理麦秸表面的润湿性能及结构特征

发表时间:2011-05-15  浏览量:1534  下载量:461
全部作者: 刘艳萍,张洋,江华,贾溃苷妆
作者单位: 河南省林业科学研究院;南京林业大学木材工业学院;南京林业大学化学工程学院
摘 要: 研究不同酶处理条件下的麦秸表面润湿性能及结构特征。结果表明:木聚糖酶处理条件为温度45℃,时间6 h,pH=5.0,酶用量205.0 IU·g-1;脂肪酶处理条件为温度50℃,时间12 h,pH=7.5,酶用量20 g·L-1,此时麦秸表面的接触角减幅最大,麦秸表面润湿性明显提高。通过扫描电子显微镜(scanning electron microscopy, SEM)分析得出:酶处理后麦秸单元的微观结构发生变化,纤维素、木质素类物质大量暴露出来;蜡质层脱落和翘起,有明显纤维骨架露出,有利于其胶合性能提高。
关 键 词: 木材科学与技术;酶;麦秸;表面润湿性能;表面结构
Title: The surface wettability and structure of wheat straw treated by enzyme
Author: LIU Yanping, ZHANG Yang, JIANG Hua, JIA Chong, ZHOU Zhaobing
Organization: Henan Academy of Forestry; College of Wood Science and Technology, Nanjing Forestry University; College of Chemical Engineering, Nanjing Forestry University
Abstract: In this paper the surface wettability and structure of wheat straw treated by enzyme were investigated under different conditions. It was found that the contact angle of wheat straw decreased greatly under the optimum condition, treatment temperature 45℃, treatment time 6 h, pH value 5.0, enzyme usage 205.0 IU·g-1 through studying the influence of xylanase and treatment temperature 50℃, treatment time 12 h, pH value 7.5, enzyme usage 20 g·L-1 through studying the influence of lipase treatment condition on the surface property of wheat straw. The micro structure of wheat straw treated by enzyme was investigated with scanning electron microscope (SEM). The results indicated that the micro structure of outer surface for the wheat straw treated by enzyme was changed, the cellulose and lignin were activated and the wax-layer of wheat straw was dissolved. This is good for increasing its gluing ability.
Key words: wood science and technology; enzyme; wheat straw; surface wettability; surface structure
发表期数: 2011年5月第9期
引用格式: 刘艳萍,张洋,江华,等. 酶处理麦秸表面的润湿性能及结构特征[J]. 中国科技论文在线精品论文,2011,4(9):836-840.
 
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