Preparation and colloidal dispersion behaviors of silica sol doped with organic pigment |
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| Authors: | Yunjie Yin Chaoxia Wang Youjiang Wang |
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| Institution: | (1) Key Laboratory of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Road, Wuxi, 214122, China;(2) School of Materials Science & Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0295, USA; |
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| Abstract: | Silica sol doped with organic pigment was prepared by hydrolyzing tetraethoxysilane with a basic catalyst via dispersing pigment
in silica sol. The colloidal properties of SiO2/pigment hybrid sol and its deposited film were investigated. The presence of pigment in SiO2/pigment hybrid sol affects the Zeta potential, particle size and surface tension compared to the silica sol without pigment.
The SiO2/pigment hybrid sol exhibited good dispersion stability in the centrifuge process. The maximum absorption wavelength was consistent
with that of the pigment disperse solution, indicating that the pigment in SiO2/pigment hybrid sol remained unchanged. Thermogravimetric analysis of the contents of organic component in silica sol and
SiO2/pigment hybrid sol were conducted, and the differential value was ascribed to the weight of the pigment and the condensate
of polyoxyethylene octylphenol ether (OP-10) and γ-Glycidoxypropyltrimethoxysilane (KH-560). The surface topography of SiO2/pigment hybrid silica film was characterized by AFM. The analysis of silica sol doped with organic pigment provides useful
information for an effective pathway to disperse pigment on fiber and other substrates. |
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