Journal
CARBOHYDRATE POLYMERS
Volume 80, Issue 3, Pages 954-961Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2010.01.012
Keywords
Mango seed; Newspaper; Cellulose acetate; Asymmetric membranes
Categories
Funding
- CNPq [620181/2006-0]
- CAPES
- Finep/Sebrae [0535/07, 3119/06]
- FAPEMIG [PIBIC A-025/2008, CEX-APQ-00466-08]
Ask authors/readers for more resources
Asymmetric membranes may be used in a broad range of applications such as reverse osmosis, hemodialysis and separation of organic mixtures. In this paper, asymmetric membranes were produced using cellulose acetate (CA) from biomass: newspaper and mango seed. The degree of substitution of CA was 2.65 +/- 0.07. Different formulations were used to prepare the CA membranes: CA/dichloromethane/water with and without magnesium perchlorate. The asymmetry of the membranes was characterized by scanning electron microscopy (SEM). Membranes produced with magnesium perchlorate presented higher water vapor flux than those produced without this salt. This difference is due to pore formation in the membrane skin when using magnesium perchlorate. Membrane substructure showed to be a determining factor in ion diffusion experiments. The coefficient of ion diffusion for the membrane of cellulose acetate from mango seed was 1.82 x 10(-8) cm(2) s for the membrane of cellulose acetate from newspaper was 7.43 x 10(-8) cm(2) s similar to the value reported in the literature for commercial CA (8.46 x 10(-8) cm(2) s(-1)). (C) 2010 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available