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| 木薯渣纳米纤维素的制备与表征 |
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黄丽婕, 张晓晓, 徐铭梓, 安书香, 李春颖, 赵含宇, 徐豪
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广西大学 轻工与食品工程学院广西清洁化制浆造纸与污染控制重点实验室，南宁530004
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| 摘要: |
| 目的 为了增加木薯渣的废物利用途径，对木薯渣进行高值化利用，制备木薯渣纳米纤维素，并对其进行表征。方法 以木薯渣为原料，对其进行酶处理和漂白处理，随后采用高压均质法制备纳米纤维素，再通过扫描电镜、透射电子显微镜、原子力显微镜、红外光谱、X-射线衍射仪和热稳定性分析对木薯渣进行表征分析。结果 木薯渣经过酶解和漂白后，纤维素质量分数从20.21%增加到77.39%，淀粉质量分数从50.39%降低到1.87%，半纤维素质量分数从18.38%降低到5.11%，木质素质量分数从3.69%降低到0.74%。结论 木薯渣纤维在103.425 MPa下均质30次后成功制备出了纳米纤维素，透射电子显微镜和原子力显微镜结果表明，CNF的直径为10 nm左右。淀粉酶处理、漂白和高压均质并没有改变木薯渣纤维的晶型结构，仍为纤维素I型。 |
| 关键词: 木薯渣 淀粉酶 漂白 纳米纤维素 |
| DOI：10.19554/j.cnki.1001-3563.2019.15.003 |
| 分类号:Q539+.3 |
| 基金项目:广西清洁化制浆造纸与污染控制重点实验室开放基金（ZR201806-6）； 2018—2020年广西本科高校特色专业及实验实训教学基地（中心）建设项目（T3050094101） |
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| Preparation and Characterization of Cassava Residue Nanocellulose |
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HUANG Li-jie, ZHANG Xiao-xiao, XU Ming-zi, AN Shu-xiang, LI Chun-ying, ZHAO Han-yu, XU Hao
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Key Laboratory of Clean Pulp and Paper and Pollution Control, College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
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| Abstract: |
| The work aims to prepare and characterize nanocellulose from cassava residue, so as to increase the way of making good use of cassava residue for its high-value utilization. Nanocellulose was prepared from cassava residue by high pressure homogenization after enzyme treatment and bleaching. The cassava residue was characterized and analyzed by scanning electron microscopy, transmission electron microscopy, atomic force microscopy, infrared spectroscopy, X-ray diffractometry and thermal stability analysis. After enzymatic hydrolysis and bleaching, the cellulose content increased from 20.21% to 77.39%, the starch content decreased from 50.39% to 1.87%, the hemicellulose content decreased from 18.38% to 5.11%, and the lignin content decreased from 3.69% to 0.74%. The cassava residue fibers are homogenized at 103.425 MPa for 30 times and successfully prepare nanocellulose. The results of transmission electron microscopy and atomic force microscopy indicate that, the diameter of CNF is about 10 nm. However, amylase treatment, bleaching and high pressure homogenization do not change the crystal structure of cassava residue fiber, and it is still cellulose I. |
| Key words: cassava residue amylase bleaching nanocellulose |
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