China Plastics ›› 2025, Vol. 39 ›› Issue (3): 36-40.DOI: 10.19491/j.issn.1001-9278.2025.03.007

• Materials and Properties • Previous Articles     Next Articles

Preparation of cellulose acetate porous membrane and its adsorption for protein

HOU Wenjie(), YANG Na, REN Jianfei, GAO Dahai, GUO Gaiping(), DAI Yuhua()   

  1. School of New Materials and Chemical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102627,China
  • Received:2024-06-14 Online:2025-03-26 Published:2025-03-24

Abstract:

In this study, cellulose acetate porous membranes with an adjustable structure and a high water flux were prepared by using cellulose acetate as a raw material, acetone as a solvent, and water as a non⁃solvent. Carboxyl groups were introduced for selective separation of protein through the oxidation of tetramethylpyridine oxide/sodium bromide/sodium hypochlorite. With a porosity of 92.5 % and a water flux of 1 655.7 L/(m2·h), the cellulose acetate porous membranes exhibited optimal comprehensive performance at a cellulose acetate concentration of 10 wt%, a coagulation bath temperature of 10 ºC, and a non⁃solvent water content of 30 wt%. After oxidation, the cellulose acetate porous membrane obtained an adsorption rate of 2 806.1 mg/g for lysozyme at pH 6.

Key words: cellulose acetate, non solvent induced phase separation, porous membrane

CLC Number: