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

Tan Zhang; Gu Xu; Zhe Fei Li; Oren Regev; Madhubhashini Maddumaarachchi; Frank D. Blum

doi:10.1016/j.jcis.2015.04.002

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

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

Department of Chemical Engineering

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

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 (T_C_,_CTAB=74°C), multilayers (T_C_,_CTAB=82°C), and a mixed PS/CTAB shell (T_C_,_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.

Original language	English
Pages (from-to)	161-169
Number of pages	9
Journal	Journal of Colloid and Interface Science
Volume	451
DOIs	https://doi.org/10.1016/j.jcis.2015.04.002
State	Published - 1 Aug 2015

Keywords

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

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2015.04.002

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title = "PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels",

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.",

keywords = "Cetyltrimethylammonium bromide, Differential scanning calorimetry, Free radical polymerization, High internal phase emulsion gels, Polymeric composite nanoparticles, Surfactant catalysis",

author = "Tan Zhang and Gu Xu and Li, {Zhe Fei} and Oren Regev and Madhubhashini Maddumaarachchi and Blum, {Frank D.}",

note = "Publisher Copyright: {\textcopyright} 2015.",

year = "2015",

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doi = "10.1016/j.jcis.2015.04.002",

language = "English",

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T1 - PS/CTAB/silica composites from room temperature polymerization of high internal phase emulsion gels

AU - Zhang, Tan

AU - Xu, Gu

AU - Li, Zhe Fei

AU - Regev, Oren

AU - Maddumaarachchi, Madhubhashini

AU - Blum, Frank D.

PY - 2015/8/1

Y1 - 2015/8/1

N2 - 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.

AB - 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.

KW - Cetyltrimethylammonium bromide

KW - Differential scanning calorimetry

KW - Free radical polymerization

KW - High internal phase emulsion gels

KW - Polymeric composite nanoparticles

KW - Surfactant catalysis

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JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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