Synthesis of modified natural rubber-stabilised silver organosols via liquid-to-liquid transfer techniques

Abu Bakar N.H.H., . and Abu Bakar M., . and Azizi N.J., . and Tan W.L., . Synthesis of modified natural rubber-stabilised silver organosols via liquid-to-liquid transfer techniques. pp. 193-203. ISSN 1511-1768

A simple one- and two-step phase transfer technique in synthesizing silver nanoparticles is described. The silver ions are reduced using sodium borohydride either before (one-step method) or after (two-step method) adding the organic phase. 2-propanol was employed as a transferring agent whereas tetraoctylammonium-bromide and 50 epoxidised natural rubber (ENR-50) was used as the stabiliser in aqueous and organic layer respectively. Both of the methods described are of comparable efficiency in transferring ions/particles whereby based on the atomic absorption spectroscopy determination more than 93 of the silver ions/particles were transported into the toluene layer. The samples were characterised by UV-vis FTIR TEM and XRD. The UV-vis spectra and XRD pattern indicated the formation of silver nanoparticles. Size and size distribution analysis of the as-formed silver nanoparticles showed that two-step phase transfer method gave smaller particle size as well as narrower size distribution. The average size and standard deviation of silver nanoparticles for the one-step and two-step method in the organic layer was 18.4 nm 9.5 nm and 15 nm 5.8 nm respectively.

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Abstract

A simple one- and two-step phase transfer technique in synthesizing silver nanoparticles is described. The silver ions are reduced using sodium borohydride either before (one-step method) or after (two-step method) adding the organic phase. 2-propanol was employed as a transferring agent whereas tetraoctylammonium-bromide and 50 epoxidised natural rubber (ENR-50) was used as the stabiliser in aqueous and organic layer respectively. Both of the methods described are of comparable efficiency in transferring ions/particles whereby based on the atomic absorption spectroscopy determination more than 93 of the silver ions/particles were transported into the toluene layer. The samples were characterised by UV-vis FTIR TEM and XRD. The UV-vis spectra and XRD pattern indicated the formation of silver nanoparticles. Size and size distribution analysis of the as-formed silver nanoparticles showed that two-step phase transfer method gave smaller particle size as well as narrower size distribution. The average size and standard deviation of silver nanoparticles for the one-step and two-step method in the organic layer was 18.4 nm 9.5 nm and 15 nm 5.8 nm respectively.

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Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Silver
AGROVOC Term:	Liquids
AGROVOC Term:	Biosynthesis
AGROVOC Term:	Polymers
AGROVOC Term:	Growth
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 03:17
URI:	http://webagris.upm.edu.my/id/eprint/23105

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