Carboxymethylation of Sago Starch and Sago Waste and the Formation of Carboxymethyl Starchhydrogel Via Irradiation Technique

Zainuddin, Norhazlin (2003) Carboxymethylation of Sago Starch and Sago Waste and the Formation of Carboxymethyl Starchhydrogel Via Irradiation Technique. Masters thesis, Universiti Putra Malaysia.

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Abstract

Carboxymethyl starch (CMS) and carboxymethyl sago waste (CMSW) were synthesized in completely heterogeneous conditions as a product of the reaction of sago starch or sago waste and sodium monochloroacetate (CICH₂COONa) in isopropanol and sodium hydroxide (NaOH). The influence of various parameters on the degree of substitution (DS) was determined. The optimum conditions obtained for CMS were as follows: NaOH concentration, 20% w/v; reaction time, 1 h; reaction temperature, 55°C; and amount of CICH₂COONa, 1.5 mole. Meanwhile the optimum conditions for carboxymethylation of sago waste were as follows: NaOH concentration, 25 % w/v; reaction time, 2 h; reaction temperature, 55°C; and amount of CICI-bCOONa, 2.0 mole. The DS and reaction efficiency (RE) under optimum conditions for CMS were 1.05 and· 85.9%, respectively, whereas for CMSW were 1.04 and 79.5%, respectively.

Item Type:Thesis (Masters)
Subject:Sago
Subject:Starch - Synthesis
Chairman Supervisor:Associate Professor Mansor bin Ahmad, PhD
Call Number:FSAS 2003 25
Faculty or Institute:Faculty of Environmental Studies
ID Code:9564
Deposited By: Muizzudin Kaspol
Deposited On:16 Feb 2011 08:49
Last Modified:21 May 2012 07:12

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