화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.110, 150-157, June, 2022
DOI10.1016/j.jiec.2022.02.048  Export Citation
Microstructure and viscoelastic behavior of waterborne polyurethane/cellulose nanofiber nanocomposite
Hui Zhao1, 2, †, Kui-Can Li1, 3, Wei Wu4, Qing Li2, Yan Jiang1, 3, †, Bing-Xu Cheng1, 3, Chong-Xing Huang1, 3, and Hua-Nan Li5
  • 1Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
  • 2Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, Guangxi University for Nationalities, Nanning 530006, China
  • 3, China
  • 4Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
  • 5State Key Laboratory of Biocatalysis and Enzyme Engineering, School of Life Sciences, Hubei University, Wuhan 430062, China
E-mail:,
Cellulose nanofiber (CNF) has been widely used to reinforce the mechanical properties of waterborne polyurethane (WPU). There are, however, few works that focus on structure, rheological behavior, and creep resistance of WPU/CNF composites. To fill this research gap, in this work, the m-CNF was obtained by c-aminopropyltriethoxysilane modification to improve the interfacial strength of CNF and WPU, and then it was introduced into the polyurethane matrix. Structure characterization of WPU/m-CNF nanocomposites is performed using Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The obtained results show that with the increase of m-CNF, the hydrogen bonding index (HBI) increased, which meant a significant improvement in the mechanical properties. The tensile strength improved by 480%. Moreover, with the increase of m-CNF content, the viscosity, storage modulus, and loss modulus of the dispersions increased and showed more obvious shear-thinning behavior. In addition, m-CNF improved the thermal stability and creep resistance of WPU. The creep strain of WPU decreased from 3% to 0.2%. This work offers a simply feasible way to prepare environmental friendly green nanocomposites.
Keywords:Waterborne polyurethane;Cellulose nanofibers;Nanocomposites
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