Zainuddin, Norhazlin (2003) Carboxymethylation of Sago Starch and Sago Waste and the Formation of Carboxymethyl Starchhydrogel Via Irradiation Technique. Masters thesis, Universiti Putra Malaysia.
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:||Starch - Synthesis|
|Chairman Supervisor:||Associate Professor Mansor bin Ahmad, PhD|
|Call Number:||FSAS 2003 25|
|Faculty or Institute:||Faculty of Environmental Studies|
|Deposited By:||Muizzudin Kaspol|
|Deposited On:||16 Feb 2011 08:49|
|Last Modified:||21 May 2012 07:12|
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