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Bacterial cellulose-chitosan membrane grafted with theophylline-imprinted copolymer by free radical copolymerization

Abd. Rahman, Mohd. Redza (2012) Bacterial cellulose-chitosan membrane grafted with theophylline-imprinted copolymer by free radical copolymerization. Masters thesis, Universiti Teknologi Malaysia, Universiti Teknologi Malaysia, Faculty of Chemical Engineering.


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In this research, benzyl diethyldithiocarbamate was immobilized on a bacterial cellulose-chitosan membrane via a silane coupler. This treated membrane was grafted with theophylline-imprinted copolymer of methacrylic acid and ethylene glycol dimethacrylate by ultraviolet irradiation. The highest degree of grafting obtained was 0.3334% for r (weight ratio of monomers to bacterial cellulose-chitosan membrane) equal to 3.244 in mmol/ml. The molecularly imprinted polymer-bacterial cellulose-chitosan membrane was prepared by using 0.5% chitosan solution containing 15.0% polyethylene glycol and evaporating the solution for 2.5 hours after coating at room temperature. The relative flux of 3.69 L/m2.h at 12.5 bar was obtained. The average pore diameter was 135 Å in dry state and 404 Å in wet state. Physical properties and morphology of the molecularly imprinted membrane were examined. The chitosan and polyethylene glycol contents in the chitosan solution had a significant effect on porosity of the membrane and the flow rate of water through the membrane. ? rel?t?vely l?rge flow r?te through the membr?ne w?th ? st?ble co?t?ng of ch?tos?n membrane was observed ?t optimized evaporation time. The tensile strength provided by the synthesized membrane was larger than the plain bacterial cellulose support, in both wet and dry states.

Item Type:Thesis (Masters)
Additional Information:Thesis (Sarjana Kejuruteraan (Bioproses)) - Universiti Teknologi Malaysia, 2012; Supervisor : Assoc. Prof. Dr. Ida Idayu Muhamad
Uncontrolled Keywords:theophylline-imprinted copolymer, chitosan, silane coupler
Subjects:Q Science > QP Physiology
Divisions:Chemical Engineering
ID Code:34582
Deposited By: Narimah Nawil
Deposited On:20 Feb 2014 01:34
Last Modified:27 Apr 2018 01:29

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