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Rheological behavior and stability of cassava starch for ceramic mould binder application

Alias, Tuti Yasmin and Idris, Mohd Hasbullah and Ahmad, Zuraida and Ourdjini, Ali (2012) Rheological behavior and stability of cassava starch for ceramic mould binder application. Advanced Materials Research, 576. pp. 162-165. ISSN 1022-6680

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Abstract

Silica free binder was developed from cassava starch to correspond common ceramic mould binder for reactive metal casting application. Ceramic slurry rheology behavior and stability depends on both binder and refractory materials properties. Starch processing started from granule expansion or swelling, gelatinization, depolymerization via prolong heating and by adding plasticizer, citric acid is to improve viscosity. Pseudoplastic or shear thinning behavior for both binder and slurry were observed starting at 0.13 Pa.s and 2.5 Pa.s respectively. Calcium carbonate (aragonite) slurry from starch binder however, exhibited viscoelastic behavior compare to colloidal silica sol. Ceramic slurry aged as both cationic starch and CaCO3 flocculate and not exfoliate as indicated by increased in the pH of the slurry.

Item Type: Article (Journal)
Uncontrolled Keywords: Cassava starch, Rheology, pH stability, Ceramic mould binder
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button): Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User: Dr Zuraida Ahmad
Date Deposited: 01 Aug 2013 14:06
Last Modified: 01 Aug 2013 14:06
URI: http://irep.iium.edu.my/id/eprint/26635

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