摘要
为了提取出性能更加优异的乌拉草(Carex meyeriana)纤维,利于其在纺织加工中的应用。本研究采用漆酶对乌拉草纤维进行处理,以漆酶用量、pH、温度为因素,以纤维木质素含量、直径、断裂强度为评价指标,采用响应曲面法进行工艺优化。并对最优工艺处理前后的乌拉草纤维进行超景深、扫描电镜、傅里叶红外光谱仪(FTIR)及X射线衍射仪(XRD)测试。结果表明,最优处理工艺为漆酶用量14%,pH 5.5,温度47℃。得到的乌拉草纤维木质素含量为7.71%,较处理前降低了60.86%;纤维直径为40.06μm,较处理前减小了48.24%;断裂强度为203.46 MPa,较处理前提升了53.71%。通过超景深三维系统观察到漆酶处理后的乌拉草纤维更细、更均匀、更柔软;扫描电镜照片及FTIR图谱表明,乌拉草纤维的胶质得到了进一步的去除;XRD图谱表明漆酶处理后乌拉草纤维的结晶度由57.09%提升到64.53%。说明漆酶处理可以改善乌拉草纤维的性能,有利于乌拉草纤维在纺织加工中的应用。
In order to extract more excellent properties of Carex meyeriana fibers applied in textile pro- cessing, this study adopted the laccase to treat C. meyeriana fibers. We used laccase dosage, pH, temper-ature as exploring factors, and the lignin content, fiber diameter, fracture strength as the evaluation index for response surface method to optimize the laccase treatment process. The results revealed that the optimize levels were 14% dosage of laccase, 5.5 of the pH and 47℃ of the temperature, and the lignin content, diameter and fraction strength was 7.71%, 40.06 μm and 203.46 MPa, which decreased 60.86% and 53.04% and increased 34.94% comparing to before treatment, respectively. We also tested the C. meyeriana fibers acquired by the optimized process through super depth of field, scanning electron microscope, FTIR and XRD. The super depth of field showed that the C. rrzeyeriana fibers became finer, more uniform and softer; The Scanning electron microscope test and FTIR test showed that the pectin on the C. meyeriana fibers had further removed; The XRD test showed that the crystallinty increased from 57.09% to 64.53%. The above results indicate that the laccase treatment could improve the performance of the C. meyeriana fibers and be benefit for the application in textile processing.
出处
《草业科学》
CAS
CSCD
北大核心
2015年第12期2131-2138,共8页
Pratacultural Science
基金
天津市自然科学基金重点项目(11JCZDJC22300)
中国纺织工业协会科技指导性项目(2008026)
关键词
乌拉草纤维
漆酶
响应曲面法
Carex meyeriana fibers
laccase
response surface method
