Citation: . CHARACTERIZATION OF REGENERATED CELLULOSE MEMBRANES HYDROLYZED FROM CELLULOSE ACETATE*[J]. Chinese Journal of Polymer Science, ;2002, 20(4): 369-375. shu

CHARACTERIZATION OF REGENERATED CELLULOSE MEMBRANES HYDROLYZED FROM CELLULOSE ACETATE*

Received Date: 20 September 2001
Revised Date: 23 November 2008

A series of cellulose acetate membranes were prepared by using formamide as additive, and then were hydrolyzedin 4 wt% aqueous NaOH solution for 8 h to obtain regenerated cellulose membranes. The dependence of degree ofsubstitution, structure, porous properties, solubility and thermal stability on hydrolysis time was studied by chemical titration,Fourier transform infrared spectroscopy, scanning electron microscopy, wide-angle X-ray diffraction, and differential scanning calorimetry, respectively.The results indicated that the pore size of the regenerated cellulose membranes was slightly smaller than that of cellulose acetate membrane,while solvent-resistance,crystallinity and thermostability were significantly improved.This work provides a simple way to prepare the porous cellulose membranes,which not only kept the good pore characteristics of cellulose acetate membranes,but also possessed solvent-resistance,high crystallinity and thermostability.Therefore,the application range of cellulose acetate membranes can be expanded.
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