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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (5): 45-50.doi: 10.3969/j.issn.0253-2417.2021.05.007

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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

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

CLC Number: