NDLI: Nanocomposite silica surfactant microcapsules by evaporation induced self assembly: tuning the morphological buckling by modifying viscosity and surface charge

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Soft Matter Vol - 8 Issue - 5

Nanocomposite silica surfactant microcapsules by evaporation induced self assembly: tuning the morphological buckling by modifying viscosity and surface charge

Content Provider	Royal Society of Chemistry (RSC)
Author	Mazumder, S. Verma, G. Hassan, P. A. Vijai, K. Sen, D. Bahadur, J. Doshi, P. Bhattacharya, S.
Copyright Year	2012
Abstract	Nanocomposite microcapsules of silica and surfactants have been synthesized using evaporation induced self-assembly through spray drying. It was established using electron microscopy and small-angle neutron/X-ray scattering experiments that the viscosity of the virgin dispersion and surface charge of colloidal components play a significant role in the buckling of spray droplets during drying. Hollow spherical grains are realized at relatively low viscosity and higher surface charge while mushroom like grains manifest at higher viscosity and lower surface charge. In the intermediate conditions, deformed doughnut shaped microcapsules are obtained. Scattering experiments establish the presence of the organization of micelle like aggregates of surfactants in the dried grains and also corroborate with the observations from electron microscopy. A plausible mechanism regarding the chronological pathways of morphological transformation is illustrated. Computer simulation, based on buckling of an elastic shell using a surface evolver, has been attempted in order to corroborate the experimental results.
Starting Page	1955
Ending Page	1963
Page Count	9
File Format	HTM / HTML PDF
ISSN	1744683X
Volume Number	8
Issue Number	6
Journal	Soft Matter
DOI	10.1039/c1sm06964k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Viscosity Computer simulation Doughnut Spray drying Micelle Surface Evolver Silicon dioxide London dispersion force Fungus Self-assembly Transmission electron microscopy X-ray scattering techniques Nanocomposite Neutron
Content Type	Text
Resource Type	Article
Subject	Chemistry Condensed Matter Physics

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