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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (5): 72-78.doi: 10.3969/j.issn.0253-2417.2021.05.011

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Preparation and Characterization of Rosin Grafted Cellulose Nanocrystals Reinforced Natural Rubber Composites

Xiaoliang GUO1,2, Simai QI1,2, Chunpeng WANG1,2, Jifu WANG1,2,*(), Fuxiang CHU1,2   

  1. 1. Institute of Chemical Industry of Forest Products, CAF; National Engineering Lab. for Biomass Chemical Utilization; Key Lab. of Chemical Engineering of Forest Products, National Forestry and Grassland Administration; Key Lab. of Biomass Energy and Material, Jiangsu Province, Nanjing 210042, China
    2. Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210037, China
  • Received:2020-09-29 Online:2021-10-28 Published:2021-11-04
  • Contact: Jifu WANG E-mail:wjf118@126.com

Abstract:

Cellulose nanocrystals(CNC) modified by rosin were used to synthesize rosin grafted cellulose nanocrystals(R-CNC). And R-CNC was applied as filler to strengthen natural rubber(NR) forming rosin grafted cellulose nanocrystals reinforced natural rubber composites(R-CNC/NR). FT-IR, UV-Vis, scanning electron microscope(SEM), X-ray diffraction(XRD) and tensile strength were employed to investigate the properties and performance. The successful grafting of rosin from CNC could be proved by FT-IR.The grafting rate of rosin calculated by UV-Vis was 30%. XRD proved that R-CNC/NR had excellent crystallinity. SEMtest showed that R-CNC had better compatibility with NR. Tensile test showed that the tensile strength of NR was 0.33 MPa. When the content of CNC was 40%, the tensile strength of natural rubber reinforced by cellulose nanocrystals(CNC/NR) was 1.56 MPa and the elastic recovery value was 88.75%. When the content of R-CNC was 40%, the tensile strength of R-CNC/NR was 2.87 MPa and the elastic recovery value was 90.04%. Therefore, the reinforcing effect of R-CNC on NR was better than that of CNC.

Key words: rosin, cellulose nanocrystals, natural rubber, polymer, composite membrane

CLC Number: