Title:
Production of Polymeric Membrane from Sugarcane Bagasse
Author(s):
Candido, R.G., Godoy, G.G., Gonçalves, A.R.
Document(s):
Paper
Poster
Abstract:
In the early 70's, in addition to the classical separation processes, a new class of processes emerged, known as membrane separation processes (MSP), which use synthetic membranes as selective barriers. These synthetic membranes arose as an attempt to mimic the natural membrane, particularly regarding its unique selectivity and permeability. Although some methods for the preparation of membranes are well known, the scattering of the polymer solution on a suitable support and immersion in a bath of non-solvent is most common for preparing polymeric membranes. To this technique is given the name of phase inversion (PI). The cellulose acetate is one of cellulose derivatives of great commercial importance due to their wide applications in fiber, plastic, photographic film, cigarette filters, and ultimately in the production of polymeric membranes. It is a versatile material and has attracted attention because of its excellent performance and features, such as high hardness and biocompatibility, good desalination capacity and low cost. The commercial cellulose acetate is usually produced from wood and cotton cellulose. In this context, sugarcane bagasse is an alternative for acetate production, aiming to reduce costs in acetate manufacturing. The purpose of this work was to extract the cellulose from sugarcane bagasse through a series of chemical treatments and use it in the production of cellulose acetate, which was utilized for making polymeric membranes employing the method of phase inversion. Dichloromethane was used as solvent and an exploratory study was carried out to determine the best conditions for the production of membranes. The cellulose obtained had a purity of about 85%. After acetylation, the acetate presented a substitution degree of 2.52 and the infrared analysis showed that the material owned the characteristic bands of acetate. Membranes produced have passed for test of water vapor flow and the one that achieved the best result, 5.86 mg/h*cm2 , was obtained employing ratio polymer/ solvent of 3.0% (w/v), 10 min of solvent evaporation and coagulation bath at 20°C.
Keywords:
cellulose, sugar cane bagasse, filtration
Topic:
Industrial Demonstration and Business Concepts
Subtopic:
Industrial biorefineries and bio-products
Event:
21st European Biomass Conference and Exhibition
Session:
4BV.4.31
Pages:
1684 - 1687
ISBN:
978-88-89407-53-0
Paper DOI:
10.5071/21stEUBCE2013-4BV.4.31
Price:
FREE
