Encapsulation method for CaCO3 nanoparticles

Dihayati, Y. and Aziz, A.R. and Abdullah, E.C. and Leong, Y.C. and Harcharan, S. (2007) Encapsulation method for CaCO3 nanoparticles. Journal of Applied Sciences, 7 (15). pp. 2046-2050.

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Abstract

In this study, a simple wet encapsulation method was used to coat the nano calcium carbonate particles at the temperature of 802°C. Stearic acid was used as the coating agent at 3, 6 and 9 wt. Analysis of SEM images indicates that agglomeration can be reduced significantly by using 3wt amount of SA. TGA analysis proved that the coated nanoparticles has the same stability with uncoated particles at temperature below 230°C. XRD peaks show that coating has no effect on crystallization and there was no phase change after coating. Lowest surface area of 22.9 m<sup>2</sup>/g was obtained from BET analysis when coating was done at 3wt SA. The DRIFT analysis also showed that it can be successfully used to investigate the change of molecules structure after coating. XPS data showed that the carbon surface element increased significantly with increasing amount of SA used for coating. © 2007 Asian Network for Scientific Information.

Item Type: Article
Additional Information: Export Date: 10 January 2011 Source: Scopus Language of Original Document: English Correspondence Address: Harcharan, S.Lot 40, Section-4, Fasa-IIA, Paula Indah 42920-Selongor, Malaysia References: Chan, C.M., Wu, J.S., Li, J.X., Cheung, Y.K., Polypropylene/ calcium carbonate nanocomposites (2002) Polymer, 43, p. 2981; Di Lorenzo, M.L., Errico, M.E., Avella, M., Thermal and morphological characterization of poly (ethylene terephthalate)/calcium carbonate nanocomposites (2002) Material Sci, 37, p. 2351; Fekete, E.P., Toth, A., Imre, B., Surface modification and characterization of particulate mineral fillers (1990) J. Colloid Interface Sci, 135, pp. 200-208; Gilbert, M., P. Petiraksakul and I. Mathieson Characterization of stearate/stearic acid coated fillers. 2001. Material Sci. Technol., 17: 1472-1478Jiang, L., Lain, Y.C., Tam, K.C., Chua, T.H., Sim, G.W., Ang, L.S., Strengthening acrylonitrile-butadiene-styrene (ABS) with nano-sized and micron-sized calcium carbonate (2005) Polymer, 46, pp. 243-252; Maged, A.O., Ulrich, W.S., Surface treatment of calcite with fatty acids: Structure and properties of organic monolayer (2002) Chem. Mater, 14, pp. 4408-4415; Moczo, J., Fekete, E., Pukanzky, Adsorption of surfactants on CaCO<sub>3</sub> and its effect on surface free energy (2004) Progr. Colloid Polym Sci, 125, pp. 134-141; Pukanszky, B., Fekete, E., Adhesion and surface modification (1999) Adv. Polymer Sci, 139, pp. 110-153; Parker, E., Schultz, J., Turchi, C., Surface properties of calcium carbonate filler with stearic acid (1984) Eur. Poly. J, 20, pp. 1155-1158; Rothon, R.N., (2003) Particulate Filled Polymer Composites, , 2nd Edn, UK. Rapra Technology Limited; Rothon, R.N., Mineral fillers in thermoplastics: Finer manufacture and characterization (1999) Adv. Polymer Sci, 139, pp. 67-107; Sutherland, I., Maton, D., Harrison, D.L., Filler surfaces and composite properties (1998) Composite Interfaces, 5, pp. 493-502
Uncontrolled Keywords: Agglomeration Calcium carbonate Nanoparticles Stearic acid Surface area
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering
Depositing User: Mr. Mohammed Salim Abd Rahman
Date Deposited: 16 Jan 2013 01:48
Last Modified: 16 Jan 2013 01:48
URI: http://eprints.um.edu.my/id/eprint/4526

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