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Zhang T, Xu G, Li ZF, et al. PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels. J Colloid Interface Sci. 2015;451:161-9doi: 10.1016/j.jcis.2015.04.002.
Zhang, T., Xu, G., Li, Z. F., Regev, O., Maddumaarachchi, M., & Blum, F. D. (2015). PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels. Journal of colloid and interface science, 451161-9. https://doi.org/10.1016/j.jcis.2015.04.002
Zhang, Tan, et al. "PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels." Journal of colloid and interface science vol. 451 (2015): 161-9. doi: https://doi.org/10.1016/j.jcis.2015.04.002
Zhang T, Xu G, Li ZF, Regev O, Maddumaarachchi M, Blum FD. PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels. J Colloid Interface Sci. 2015 Aug 01;451:161-9. doi: 10.1016/j.jcis.2015.04.002. Epub 2015 Apr 06. PMID: 25897852.
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J Colloid Interface Sci. 2015 Aug 01;451:161-9. doi: 10.1016/j.jcis.2015.04.002. Epub 2015 Apr 06.

PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels.

Journal of colloid and interface science

Tan Zhang, Gu Xu, Zhe-Fei Li, Oren Regev, Madhubhashini Maddumaarachchi, Frank D Blum

Affiliations

  1. Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA.
  2. Brewer Science Inc., 2401 Brewer Drive, Rolla, MO 65401, USA.
  3. Department of Mechanical Engineering, Purdue School of Engineering and Technology, Indiana University - Purdue University Indianapolis, IN 46202, USA.
  4. Department of Chemical Engineering, Ben-Gurion University of the Negev, P.O. Box 653, 84105 Beer-Sheva, Israel.
  5. Department of Chemistry, Oklahoma State University, Stillwater, OK 74078, USA. Electronic address: [email protected].

PMID: 25897852 DOI: 10.1016/j.jcis.2015.04.002

Abstract

Polystyrene (PS)/cetyltrimethylammonium bromide (CTAB)/silica composites were prepared by CTAB-catalyzed in-situ polymerization of high internal phase emulsion gels (HIPE gels) at room temperature. The room temperature approach in HIPE gels yielded mono-dispersed PS/CTAB/silica spherical composite particles with sizes of 121 and 155nm. The complex microscopic internal structures of these particles were determined with the use of temperature-modulated differential scanning calorimetry (TMDSC). CTAB, in particular, was identified in different environments within the composite particles based on its different crystallization temperatures observed on cooling: a thin layer at the surface of the fumed silica (TC,CTAB=74°C), multilayers (TC,CTAB=82°C), and a mixed PS/CTAB shell (TC,CTAB=65°C). The amounts of each component were estimated from the enthalpies of the crystallization. The PS/CTAB mixed shell contained CTAB on the surface of the particle plus internal CTAB domains.

Copyright © 2015 Elsevier Inc. All rights reserved.

Keywords: Cetyltrimethylammonium bromide; Differential scanning calorimetry; Free radical polymerization; High internal phase emulsion gels; Polymeric composite nanoparticles; Surfactant catalysis

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