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林产化学与工业 ›› 2021, Vol. 41 ›› Issue (5): 45-50.doi: 10.3969/j.issn.0253-2417.2021.05.007

• 研究报告 • 上一篇    下一篇

疏水亲油木质纳米纤维素气凝胶的制备及表征

卞辉洋1,2, 扶艳荞1, 陈李栋1, 杨伟胜2, 姚双全3, 戴红旗1,*()   

  1. 1. 南京林业大学 江苏省制浆造纸科学与技术重点实验室, 江苏 南京 210037
    2. 中科院过程工程研究所 南京绿色制造产业创新研究院, 江苏 南京 211135
    3. 广西大学 轻工与食品工程学院, 广西 南宁 530004
  • 收稿日期:2020-11-06 出版日期:2021-10-28 发布日期:2021-11-04
  • 通讯作者: 戴红旗 E-mail:hgdhq@njfu.edu.cn
  • 作者简介:戴红旗, 教授, 博士生导师, 研究领域为纳米纤维与生物基功能材料; E-mail: hgdhq@njfu.edu.cn
    卞辉洋(1992-), 男, 江苏东台人, 讲师, 博士, 主要从事木质纳米纤维制备与应用研究
  • 基金资助:
    广西清洁化制浆造纸与污染控制重点实验室开放课题(2019KF07);中科院过程工程研究所南京绿色制造产业创新研究院创新合作课题(YFW-2020-071)

Preparation and Characterization of Hydrophobic and Lipophilic Lignocellulosic Nanofibrils-based Aerogel

Huiyang BIAN1,2, Yanqiao FU1, Lidong CHEN1, Weisheng YANG2, Shuangquan YAO3, Hongqi DAI1,*()   

  1. 1. Jiangsu Provincial Key Laboratory of Pulp and Paper Science and Technology, Nanjing Forestry University, Nanjing 210037, China
    2. Nanjing IPE Institute of Green Manufacturing Industry, Institute of Process Engineering, Chinese Academy of Sciences, Nanjing 211135, China
    3. School of Light Industrial and Food Engineering, Guangxi University, Nanning 530004, China
  • Received:2020-11-06 Online:2021-10-28 Published:2021-11-04
  • Contact: Hongqi DAI E-mail:hgdhq@njfu.edu.cn

摘要:

以芒草秸秆纤维为原料,采用柠檬酸预处理结合高压均质制得木质纳米纤维素(LCNF);LCNF在催化剂三乙胺作用下与4,4’-二苯基甲烷二异氰酸酯(MDI)交联制备高吸油性木质纳米纤维素气凝胶,利用冷场发射扫描电子显微镜、红外光谱仪、热重分析仪、光学接触角仪对气凝胶性能进行表征分析,并以重量法测定气凝胶的吸油性能。研究结果表明:改性LCNF气凝胶有明显的多级微/纳粗糙结构,且具有良好的热稳定性和疏水吸油性能,最大失重热降解温度和水接触角分别为353.6℃和152.2°;红外光谱分析表明LCNF上的羟基与MDI的异氰酸根发生交联反应;当LCNF与MDI的质量比为1:4时,改性气凝胶的水接触角为138.1°,吸油性能最佳,对氯仿的吸油倍率可达41.6 g/g。

关键词: 4, 4’-二苯基甲烷二异氰酸酯, 木质纳米纤维素, 气凝胶, 交联作用, 吸油性能

Abstract:

Miscanthus-based lignocellulosic nanofibrils(LCNF) was produced by using citric acid pretreatment followed by the high-pressure homogenization with using miscanthus straw fiber as raw material. LCNF was cross-linked with 4, 4'-diphenyl-methane-diisocyanant(MDI) by using triethylamine as catalyst to obtain aerogel with high oil absorption capacity. The properties of aerogels were characterized by cold field emission scanning electron microscope, Fourier transform infrared spectrometer(FT-IR), thermogravimetric analyzer, and optical contact angle analyzer, and the oil absorption performance of aerogel was determined by gravimetric method. The results showed that the modified LCNF aerogel exhibited obvious multi-level rough micro/nanostructure with good thermal stability, hydrophobicity, and oil absorption capacity; the maximum weight loss temperature and water contact angle were 353.6℃ and 152.2°, respectively. FT-IR showed that cross-linking reaction was occurred between the hydroxylgroup on LCNF and the isocyanate group of MDI. When the mass ratio of LCNF to MDI was 1:4, the water contact angle of themodified aerogel was 138.1°, and the oil absorption performance was the bestwith chloroform absorption capacity of 41.6 g/g.

Key words: 4, 4'-diphenyl-methane-diisocyanant, lignocellulosic nanofibrils, aerogel, cross-linking, oil absorption

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