| 纤维素酶协同机械法制备微/纳纤丝 |
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| 引用本文： | 丝 李珊珊,张 洋,王 超,江 华,李文定.纤维素酶协同机械法制备微/纳纤丝[J].天津农业科学,2013(11):4-8. |
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| 作者姓名： | 丝 李珊珊 张 洋 王 超 江 华 李文定 |
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| 作者单位： | [1]南京林业大学材料科学与工程学院,江苏南京210037 [2]南京林业大学化学工程学院,江苏南京210037 |
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| 基金项目： | 国家自然科学基金项目（31070492） |
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| 摘 要： | 以杨木纸浆纤维为原料,采用纤维素酶水解法协同机械处理法制备出微/纳纤丝（Micro/Nanofibrils）.酶处理制备微/纳纤丝的影响因素按大小依次为：时间、加酶量、料液比.最佳工艺条件：处理时间为36 h,加酶量30 FPU,料液比为1∶40.酶解后纤维的结晶度为84.2％,纤维素含量为95.26％,再经过纤丝进行超声和高压均质间歇式处理来制备微/纳纤丝.从SEM图可以看出,纤丝表面起毛、分丝帚化,次生壁中层S2上微纤丝暴露,分离出了细小纤维.纤维的直径分布在25～55 nm,宽度方向已经达到纳米级纤丝要求.
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| 关 键 词： | 纤维素酶 微 纳纤丝 机械处理 |
Preparation of Micro/Nanofibrils with Synergistic Treatment of Cellulase and Mechanical Processing |
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| LI Shan-shan,ZHANG Yang,WANG Chao,JIANG Hua,LI Wen-ding.Preparation of Micro/Nanofibrils with Synergistic Treatment of Cellulase and Mechanical Processing[J].Tianjin Agricultural Sciences,2013(11):4-8. |
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| Authors: | LI Shan-shan ZHANG Yang WANG Chao JIANG Hua LI Wen-ding |
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| Institution: | 1.College of Material Science and Engineering, Nanjing, Jiangsu 210037, China ;2.College of Chemical Engineering, Nanjing Forestry University, Nanjing, Jiangsu 210037, China) |
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| Abstract: | Micro/nanofibrils produced by synergistic treatment of cellulase hydrolysis and mechanical processing, which take poplar paper pulp as raw materials. The influencing factors of preprocessing micro/nanofibrils with cellulase are as follows： time, the enzyme amount and solid-liquid ratio. Results indicated that the optimal values of orthogonal experiment are as follows： processing time 36 h,30 FPU of cellulase, the ratio of solid to liquid 1：40. The crystallinity of fibers is 86.2% and cellulose content is 95.26% after cellulase hydrolysis. The SEM images suggest that the surface of micro/nanofibrils emerge tiny fibers and fibrillation, the micro/ nanofibrils are exposured on the central layer of secondary wall （$2） which generate mircofibrils. The fiber distribution is from 25 to 55-nm-wide, the width of micro/nanofibrils has fulfilled the requirements of nanoscale. |
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| Keywords: | cellulase micro/nanofibrils mechanical processing |
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