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Biomass Chemical Engineering ›› 2020, Vol. 54 ›› Issue (2): 6-14.doi: 10.3969/j.issn.1673-5854.2020.02.002

• Research Report • Previous Articles     Next Articles

Preparation and Properties of Bagasse Holocellulose Films and Membranes

Hao YANG1,3,Qi CHEN1,Huimin ZHAO2,Haojie GU2,Jie YAN1,Hailin LIN1,*()   

  1. 1. College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China
    2. Guangdong Institute of World Soil Resources, Guangzhou 510385, China
    3. Guangzhou Key Laboratory for Efficient Utilization of Agricultural Chemicals, Guangzhou 510225, China
  • Received:2019-06-24 Online:2020-03-30 Published:2020-04-16
  • Contact: Hailin LIN E-mail:hailin0008@126.com
  • Supported by:
    广东省科技计划(2014A050503065);广东省科技计划(2015B020215012);广东省农业科技创新联盟建设(3187);广东省产学研协同创新重大专项资助项目(201604020074)

Abstract:

The holocellulose film was manufactured from the holocellulose that was extracted from the bagasse with using ZnCl2 solution as solvent by using the phase inversion method. Then, the effect of holocellulose dosage(calculated by the mass of ZnCl2 solution, similarly hereinafter), dissolution time, gelation time and glycerin soaked mass fraction on the porosity, water flux of wet membrane and mechanical properties of dry film, were investigated. Sequentially, SEM, XRD, FT-IR and TG were applied to study the dissolution and film formation mechanism. The results showed that the holocellulose extracted from the bagasse could be used as raw material to prepare cellulose films. And when the holocellulose dosage was 5%, the gelation time was 3 d and the dissolution time was 1 h, the water flux of the obtained wet membrane reached the minimum of 17.2 L/(m·h), and the porosity was 83.3%. And the corresponding dry film obtained by plasticizing with 10% glycerol had the maximun tensile strength of 21.9 MPa and the elongation at break reached 22.2%.FT-IR and TG analysis showed that hemicellulose was not contained in the film made from holocellulose, and the hemicellulose may be hydrolyzed during dissolution or precipitated during film formation. SEM image showed that there are a large number of uniform holes inside the wet membrane, and the pores of the membrane shrank to form a dense structure.XRD results showed that the cellulose type Ⅰ to cellulose type Ⅱ after film formation, and the crystallinity decreased from 48.8% to 41.5%.

Key words: bagasse, holocellulose, cellulose film

CLC Number: