The mechanism of emulsion stabilization by small silica (Ludox) particles

Hassander, Helén; Johansson, Beatrice; Törnell, Bertil

doi:10.1016/0166-6622(89)80010-1

Cited by 99 publications

(58 citation statements)

References 1 publication

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“…These results are in line with the previous researchers' findings (5,37,38). Meanwhile, there are a few points worth noting; in the presence of CTAB, the tendency of SiO 2 moieties (in acidic condition) into the largish spherical coagulation would be increased (38,39). Thus, it can be a cause for larger particle size in acidic environment in comparison with a basic one.…”

Section: Particle Size Of Silica/p(mma-co-st)supporting

confidence: 91%

Morphology control of silica/poly(methyl methacrylate-co-styrene) hybrid nanoparticles via multiple-miniemulsion approach

Nazarabady

Farzi

2016

E-Polymers

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An appropriate approach has been used for the preparation of silica/P(MMA-co-St) hybrid nanoparticles through converting previously prepared inverse miniemulsions into a direct miniemulsion and consequently, using the droplet nucleation polymerization technique. In the early stage of the procedure, silica particles were synthesized from TEOS in the presence of NH 4 OH or HCl as a catalyst through a base or acid-catalyzed sol-gel process. TEOS, ethanol and tirmethoxyvinylsilan were mixed in MMA:St (50:50) to create the inverse miniemulsion I, similarly CTAB, NH 4 OH/HCl and distilled water were dispersed into MMA:St (50:50) and called inverse miniemulsion II. Then, the two mentioned inverse miniemulsions were emulsified in water to achieve direct miniemulsion. The nature of the catalyst and TEOS concentration varied, for the aims of investigation, their effect on the morphology and size of hybrid nanoparticles. This route provided a unique process for silica/polymer hybrid nanoparticles production, avoiding organic solvents. Transmission electron microscopy micrographs revealed that, the morphology of the hybrid nanoparticles can be controlled by the nature of the catalyst.

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Section: Particle Size Of Silica/p(mma-co-st)supporting

confidence: 91%

Morphology control of silica/poly(methyl methacrylate-co-styrene) hybrid nanoparticles via multiple-miniemulsion approach

Nazarabady

Farzi

2016

E-Polymers

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“…Remarkable progress in this field was achieved in the result of investigations of the adsorbed particle structure [29][30][31] and of the influence of capillary pressure arising in emulsion films on stability when the interfacial particle layers come into contact with each other [17,19]. In particular it was established that the film stabilization is reached by flocs of silica particles in aqueous medium [29,30] and in w/o-emulsion consisting of latexes the individual particles format close-packed monolayer at the surface of drops [29].…”

Section: Emulsions and Emulsion Films Stabilized By Solid Particlesmentioning

confidence: 99%

“…In particular it was established that the film stabilization is reached by flocs of silica particles in aqueous medium [29,30] and in w/o-emulsion consisting of latexes the individual particles format close-packed monolayer at the surface of drops [29].…”

Section: Emulsions and Emulsion Films Stabilized By Solid Particlesmentioning

confidence: 99%

About mechanism of foam stabilization by solid particles

Kruglyakov

Elaneva

Вилкова

2011

Advances in Colloid and Interface Science

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“…The literature contains a number of studies on how particles affect the stability of froths and foams (relevant examples include Garrett 1979;Aronson 1986;Dippenaar 1982aDippenaar , 1982bTang et al 1989;Berg 1989a, 1989b;Hudales and Stein 1990;Koczo et al 1994;Aveyard et al 1994;Kulkarni et al 1.11 1977) and the similar situation of emulsions (Van Boekel and Walstra 1981;Hassander et al 1989;Levine et al 1989aLevine et al , 1989bSharma 1994, 1995). In these studies, particles both increased and decreased the stability of the bubbles, and the role of the particles depended on subtle differences in the bubble (droplet)/particle interactions.…”

Section: 10mentioning

confidence: 99%