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Precipitated silica

About: Precipitated silica is a research topic. Over the lifetime, 1401 publications have been published within this topic receiving 20992 citations.


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Journal ArticleDOI
TL;DR: The results of infrared spectroscopic studies and dynamic mechanical studies reveal that, apart from the rubber-filler bonding, as is normally observable in diene rubbers, ion-dipole and hydrogen-bonding interactions occur between the active sites on the filler surface and the ionic aggregates as discussed by the authors.
Abstract: Incorporation of SRF and ISAF grades of carbon black and precipitated silica improves the physical properties of the zinc stearate plasticized ionomer, namely, the zinc salt of sulfonated maleated EPDM rubber, which behaves as an ionic thermoplastic elastomer. The reinforcing ability of the fillers follows the order SRF carbon black < silica < ISAF carbon black. The activation energy of the melt flow also follows the same order. The results of infrared spectroscopic studies and dynamic mechanical studies reveal that, apart from the rubber–filler bonding, as is normally observable in diene rubbers, ion–dipole and hydrogen-bonding interactions occur between the active sites on the filler surface and the ionic aggregates. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 326–337, 2000

6 citations

Book ChapterDOI
01 Jan 2015
TL;DR: In this paper, three different types of nano-silica were applied in self-compacting concrete (SCC), one produced by the controlled dissolution of the olivine mineral and two having similar particle size distributions (PSD), but produced through two different processes: fumed powder nano silica and precipitated silica in colloidal suspension.
Abstract: In this study, three different types of nano-silica were applied in self-compacting concrete (SCC), one produced by the controlled dissolution of the olivine mineral and two having similar particle size distributions (PSD), but produced through two different processes: fumed powder nano-silica and precipitated silica in colloidal suspension. The influence of the nano-silica on SCC was investigated with respect to the properties of the concrete in fresh (workability) and hardened state (durability properties). Additionally, the densification of the microstructure of the hardened concrete was analyzed by SEM and EDS techniques. The obtained results demonstrate that an efficient use of nano-silica in SCC can improve its durability properties. Considering the reactivity of the different nano-silica studied, the colloidal type showed a higher reactivity at early age, which influenced the final SCC properties.

6 citations

Patent
13 Feb 1975
TL;DR: In this paper, the index of refraction of the silica so produced is achieved by introduction of controlled amounts of adduct material such as aluminum sulfate to the acid prior to its introduction to the silicate solution.
Abstract: Silica products having very high structure as defined by the ability of the silica material to hold water in its wet cake, high oil absorption, and very high surface area can be produced by controlling the rate of acidulation during their production and maintaining the same at a very low rate during the course of the addition of acid to the solution of alkali metal silicate. The control of the index of refraction of the silica so produced is achieved by introduction of controlled amounts of adduct material such as aluminum sulfate to the acid prior to its introduction to the silicate solution.

6 citations

Patent
24 Aug 1999
TL;DR: In this paper, a specific surface area measured by cetyltrimethylammonium bromide (CTAB) adsorption is 180-270 m /g, and on a fine pore distribution measured by mercury penetration method, a proportion of a volume of fine pores having >=50 Å and =70 ℩ and =
Abstract: PROBLEM TO BE SOLVED: To produce precipitated silica manifesting a reinforcing effect with good balance, when it is filled in elastomer or resin. SOLUTION: In the precipitated silica, a specific surface area measured by cetyltrimethylammonium bromide(CTAB) adsorption is 180-270 m /g, and on a fine pore distribution measured by mercury penetration method, a proportion of a volume of fine pores having >=50 Å and =70 Å and =100 Åand <=150 Å fine pore diameter is 10-30%.

6 citations

Book ChapterDOI
01 Jan 2004
TL;DR: In this paper, the surface of the silica is modified to reduce filler-filler interaction and to enhance the compatibility of precipitated silica with hydrocarbon rubbers by modifying the surface.
Abstract: Therefore, it is necessary to reduce the filler-filler interaction and to enhance the compatibility of precipitated silica with hydrocarbon rubbers by modifying the surface of the silica. Bifunctional organo-silanes, such as bis(triethoxysilylpropyl)tetrasulfide (TESPT), are commonly used as coupling agents [7, 8]. The same type of compounds also enhance the rubber-metal bonding of sulphur-cured rubber polymers [9, 10].

6 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20236
202217
202118
202030
201931
201841