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Chemistry and Industry of Forest Products ›› 2019, Vol. 39 ›› Issue (6): 13-20.doi: 10.3969/j.issn.0253-2417.2019.06.002

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Preparation and Characterization of Carboxymethyl Hemicelluloses/Chitosan/Graphene Oxide Composite Film

Ying GUAN1,2(),Jun RAO1,Yule WU1,Ran YANG1,Hui GAO1,*()   

  1. 1. School of Forestry and Landscape, Anhui Agricultural University, Hefei 230036, China
    2. Biomass Molecular Engineering Center, Anhui Agricultural University, Heifei 230036, China
  • Received:2019-07-09 Online:2019-12-28 Published:2019-12-21
  • Contact: Hui GAO E-mail:xiaomi1231@163.com;huigaozh@163.com
  • Supported by:
    安徽省高等学校自然科学研究项目(KJ2018A0152);生物质分子工程中心开放课题基金资助项目(无编号);安徽省自然科学基金资助项目(1808085MC68)

Abstract:

Carboxymethyl hemicellulose was modified by the carboxymethylation reaction which extracted from bamboo. The hemicellulose/chitosan/graphene oxide composite films were prepared from the obtained carboxymethyl hemicelluloses, chitosan and grapheme oxide, which possessed excellent mechanical and oxygen barrier properties. The properties of the composite films were analyzed by FT-IR, XRD, SEM, TGA, mechanical strength and oxygen barrier tests. The different contents of graphene oxide were detected to analyze the effects of structure and properties of the composite films. The matrix of CMH, CS, GO were combined mainly through ion bond and hydrogen bond, and the GO was dispersed uniformly in CMH/CS matrix. Therefore, the surface of the film was smooth and dense with regular layered structure. The mechanical properties and thermal stability of the composite films were obviously improved by the addition of GO, which was due to the enhancement of GO in the whole composite system. The oxygen barrier ability of the composite film was also increased. The best mechanical properties of composite membranes were as follows:the tensile stress was 73.63 MPa, the tensile strain was 20.24%, and Young's modulus was 2.28 GPa when the content of graphene oxide was 0.5%. Meanwhile, it performed the best oxygen barrier property when the content of graphene oxide was 0.5%, and the gas permeation coefficient of the film was reached to 3.793 cm3·cm/(m2·s·Pa). The initial decomposition and maximum loss ratio temperature of the FG0.5 were 242.4 and 274.5℃, respectively.

Key words: carboxymethyl hemicelluloses, chitosan, graphene oxide, composite film

CLC Number: