漆酶/介体改性对二次纤维微晶结构的影响  

Effects of OCC Treated with Laccase / Mediator on Fiber Crystal Structure

作　　者：杨青[1] 刘建祥[1] 万金泉[1,2] 陈杨梅[3] 马邕文[1,2] 王艳[2] 

机构地区：[1]华南理工大学制浆造纸工程国家重点实验室,广东广州510640 [2]华南理工大学环境与能源学院,广东广州510006 [3]华南农业大学资源环境学院,广东广州510642

出　　处：《纸和造纸》2015年第9期74-77,共4页Paper and Paper Making

基　　金：国家自然科学基金项目(NO.31170551);教育部博士点基金项目(NO.20110172110015);广东省高校优秀青年创新人才培养计划项目(No.LYM10014)

摘　　要：通过X衍射线(XRD)和红外光谱(FT-IR)研究二次纤维经漆酶/谷氨酸和漆酶/组氨酸改性后,物理性能和微晶结构以及不同形式氢键含量的变化情况。研究结果表明:改性使成纸的撕裂指数、抗张指数分别提高了17%和58%;XRD结果显示晶面尺寸和结晶度在改性过程中都发生了相应的变化,并且有一些新的晶型出现,与空白样相比,经漆酶/组氨酸和漆酶谷氨酸改性后纤维的结晶度分别下降4.99%和3.03%;分子间氢键和分子内氢键相对含量发生变化,证实了分子间氢键力对纤维素链接稳定起主要作用,而分子内氢键起辅助地位。The physical properties and microcrystalline structure were studied, the change of content of different form hydrogen bonds of secondary fiber treated with laccase/glutamic acid and laccase/histidine,though X-Ray diffraction （XRD） and infrared spectroscopy （FT-IR）. Research results showed that the modification made paper tensile index, tear index increase about17%, 18% separately. XRD result showed that the crystal size and crystallinity of modified secondary fiber take change in the process, and some new crystal shape form. Compared with control sample, after modification the crystallinity decrase 4.99%, 3.03% separately. Intermolecular hydrogen bond and intramolecular hydrogen bonding relative content changes, confirmed that the intermolecular hydrogen bond force plays a main role link stability of cellulose, and intramolecular hydrogen bonding play an assistant role.

关 键 词：二次纤维 结晶度 氢键 

分 类 号：TS71[轻工技术与工程—制浆造纸工程]