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林产化学与工业 ›› 2019, Vol. 39 ›› Issue (2): 89-95.doi: 10.3969/j.issn.0253-2417.2019.02.013

• 研究报告 • 上一篇    下一篇

低品质纤维制备微纤化纤维素的研究

尹文章1,李建强2,许正茂3,张春辉1,*()   

  1. 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. 华泰集团有限公司,山东 东营 257335
    3. 亚太森博(广东)纸业有限公司,广东 江门 510110
  • 收稿日期:2018-09-03 出版日期:2019-04-25 发布日期:2019-05-08
  • 通讯作者: 张春辉 E-mail:chunhui@scut.edu.cn
  • 作者简介:尹文章(1995—),男,山东济南人,硕士生,主要从事生物质基材料研究
  • 基金资助:
    国家重点实验室开放基金项目(201533);国家自然科学基金项目(21406079);广州市科技计划重点项目(201607020025)

Preparation of Micro-nanocellulose from Low Quality Fiber

Wenzhang YIN1,Jianqiang LI2,Zhengmao XU3,Chunhui ZHANG1,*()   

  1. 1. State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
    2. Huatai Group Co., Ltd., Dongying 257335, China
    3. Asia Symbol (Guangdong) Paper Co., Ltd., Jiangmen 510110, China
  • Received:2018-09-03 Online:2019-04-25 Published:2019-05-08
  • Contact: Chunhui ZHANG E-mail:chunhui@scut.edu.cn
  • Supported by:
    国家重点实验室开放基金项目(201533);国家自然科学基金项目(21406079);广州市科技计划重点项目(201607020025)

摘要:

以造纸浆渣作为原材料,用高碘酸钠氧化法制备二醛基纤维素(DAC),并利用响应面法优化了DAC的制备工艺,最后对二醛基纤维素进行高压均质化处理得到了微纤化纤维素(MFC)。实验结果表明:在反应温度48 ℃,氧化剂用量50%,反应时间176 min的最优工艺条件下制备的DAC醛基达到947.38 μmol/g。高压均质处理60 min得到的MFC平均粒径为532 nm,结晶度为27.13%,仍然保留有纤维素的基本结构,但热稳定性有所降低。在纸浆中添加5%的MFC可使纸页的抗张强度和耐破指数分别提高了81.40%和47.41%,透气度下降约50%,不透明度稍有提高。

关键词: 造纸浆渣, 二醛基纤维素, 微纤化纤维素, 纸页增强

Abstract:

Pulp residue was used as raw material to prepare the dialdehyde cellulose(DAC) with sodium periodate oxidation method. The response surface method was used to optimize the preparation process of DAC. Then the microfibrillated cellulose (MFC) was prepared with dialdehyde cellulose through high-pressure homogenizer. Experimental results showed that when temperature, oxidant dosage and time corresponded to 48 ℃, 50% and 176 min respectively, the aldehyde group content of DAC would reach 947.38 μmol/g. After high-pressure homogenization treatment for 60 min, the average particle size of the MFC was 532 nm and the crystallinity was 27.13%. And MFC retained the structure of the cellulose, but the thermal stability was lower. The tensile strength and bursting strength of the paper could be increased 81.40% and 47.41%, respectively, whereas its air permeability was reduced by about 50% when adding 5% MFC in it. However, the opacity of paper was slightly improved when MFC as added.

Key words: pulp residue, dialdehyde cellulose, microfibrillated cellulose, paper strengthening

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