Rheological and thermal stability of cationic-modified diutan gum biopolymer

Norhanis Arbaaˈin, and Rasidi Roslan, and Izan Izwan Misnon, and Mohd Hasbi Ab Rahim, (2020) Rheological and thermal stability of cationic-modified diutan gum biopolymer. Sains Malaysiana, 49 (10). pp. 2547-2557. ISSN 0126-6039


Official URL: http://www.ukm.my/jsm/malay_journals/jilid49bil10_...


Cationic diutan gum (CDG) biopolymer has been developed by incorporating a quaternary amine group on diutan gum (DG) structure to improve the thermal and rheological properties. The modification was performed by mixing DG with different N-(3-chloro-2-hydroxypropyl) trimethyl ammonium chloride (CHPTAC) concentration to produce CDG in the presence of sodium hydroxide. The FTIR results confirmed the incorporation of cationic moieties onto the CDG chains. The surface morphology observed through FESEM showed that the smooth surface of DG was converted to a connective spherical reticular structure upon CHPTAC modification. The viscosity of CDG gelling fluid was increased after modification due to electrostatic chain interaction. Rheological properties showed that the plateau-like region was observed which signifying a stable gel response towards frequency. Thermal stability analysis using static thermal aging test showed the CDG was stable up to 170 °C suggesting this biopolymer can withstand the high-temperature requirements of the upstream petroleum industry.

Item Type:Article
Keywords:Cationized polysaccharide; CHPTAC; Diutan gum; Petroleum industry; Rheological behavior
Journal:Sains Malaysiana
ID Code:15950
Deposited By: ms aida -
Deposited On:02 Dec 2020 06:08
Last Modified:10 Dec 2020 20:32

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