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›› 2009, Vol. 43 ›› Issue (2): 15-18.

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The Research of Miscibility of Micro/Nano-crystal Cellulose and Polysulphone Blend System

TANG Huan-wei, ZHANG Li-ping, LIN Xing   

  1. College of Material Science and Technology, Beijing Forestry University, Beijing 100083, China
  • Received:2008-09-24 Revised:1900-01-01 Online:2009-03-30 Published:2009-03-30

Abstract: The miscibility of micro/nano-crystal cellulose/polysulphone blend system was studied by determination of absolute viscosity, and analysis of phase separation structure and coagulation properties of blend system, as well as determination of water flux and rejection ratio of the composite membrane. Under different temperatures of coagulation bath, the structure of membrane was examined by SEM. These results indicated that at a certain proportion scale micro/nano-crystal cellulose were equably dispersed in PSF casting solution. The blend system was semimiscible with a nonlinear viscosity curve. Under the condition of 18% polysulphone, PVP K30 as additive in 0.3% mass fraction, 10 s evaporation time, 5.4% micro/nano-crystal cellulose the pure water flux of the composite membrane could reach 235.27 L/(m2·h) and the rejection ratio was 95.35%.The gradient of membrane poles became better, with the increasing of temperature of coagulation bath.

Key words: micro/nano-crystal cellulose, polysulphone, miscibility, ultrafiltration membrane

CLC Number: