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LbL-coated microcapsules as systems for encapsulation of optical brightening agent

Tripathy, Jasaswini and Raichur, Ashok M (2012) LbL-coated microcapsules as systems for encapsulation of optical brightening agent. In: JOURNAL OF APPLIED POLYMER SCIENCE, 127 (3). pp. 1609-1614.

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Official URL: http://dx.doi.org/10.1002/app.37531

Abstract

We report the encapsulation of optical brightening agent (OBA) into hollow microcapsules prepared by the controlled Layer- by-Layer (LbL) self-assembly process, achieved by the sequential adsorption of oppositely charged polyelectrolytes using negatively charged silica template. Loading takes place by spontaneous deposition method which was proved by confocal laser scanning microscopy (CLSM) using rhodamine 6G (Rd6G) as a fluorescent probe. The loading of the OBA into the microcapsules was found to be dependent on the feeding concentration, pH of the medium, and loading temperature. The encapsulation efficiency of OBA decreased on increasing feeding concentration. Maximum loading was observed at pH 4 and amount of OBA loaded decreased with increase in pH. The loaded OBA was released in a sustained manner for 8 h. No degradation of the OBA was observed during the process of encapsulation and release. Polyelectrolyte capsules potentially offer an innovative way of encapsulating large amounts of active materials for a variety of applications. (c) 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 127: 1609-1614, 2013

Item Type: Journal Article
Additional Information: Copyright for this article belongs to WILEY-BLACKWELL, USA
Department/Centre: Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Depositing User: Francis Jayakanth
Date Deposited: 13 Dec 2012 05:37
Last Modified: 13 Dec 2012 11:21
URI: http://eprints.iisc.ac.in/id/eprint/45508

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