1960
DOI: 10.1039/tf9605600866
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The stability of hydrophobic sols in the presence of surface-active agents. Part 2.—The stability of silver iodide sols in the presence of cationic surface-active agents

Abstract: The stability of negative silver iodide sols as a function of the concentration of added cationic surface-active agents has been examined spectrophotometrically. The influence of PI, temperature, particle size, and the nature of the surface-active agent, has been studied. The surface-active agents used were octyl-, dodecyl-, and cetylpyridinium bromides, dodecyltrimethylammonium bromide, dodecylamine hydrochloride, dodecylquinolinium bromide and 1,lO-dipyridinium decane bromide. The stability of the sols decre… Show more

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Cited by 74 publications
(17 citation statements)
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“…A subsequent destabilization at high concentrations was also observed, quite in analogy to OMIM + . 64 Enzymatic activity reflects the same order, namely, the proteins lose their activity in the presence of HMIM + at lower concentration than for EMIM + . 39,40 Similar stability behaviour was reported for the aggregation of latex particles in the presence of multivalent ions or short-chain oligoamines.…”
Section: Effect Of the Alkyl Chain Lengthmentioning
confidence: 96%
See 1 more Smart Citation
“…A subsequent destabilization at high concentrations was also observed, quite in analogy to OMIM + . 64 Enzymatic activity reflects the same order, namely, the proteins lose their activity in the presence of HMIM + at lower concentration than for EMIM + . 39,40 Similar stability behaviour was reported for the aggregation of latex particles in the presence of multivalent ions or short-chain oligoamines.…”
Section: Effect Of the Alkyl Chain Lengthmentioning
confidence: 96%
“…This trend is reminiscent to previous findings for oxide and silver halide particles in the presence of ionic surfactants of variable chain lengths, whereby the IEP or the first CCC shifts towards smaller concentrations with increasing alkyl chain length. [61][62][63][64] In addition, the restabilization occurred in all systems containing surfactants with an octyl chain or longer. A subsequent destabilization at high concentrations was also observed, quite in analogy to OMIM + .…”
Section: Effect Of the Alkyl Chain Lengthmentioning
confidence: 99%
“…Similar charge reversal phenomena were also observed with colloidal particles in the presence of other strongly adsorbing species. These systems include oxide particle suspensions containing oppositely charged surfactants 15,[36][37][38][39][40] or when subject to pH variations 11,17,18 , and latex particle suspensions in the presence of oppositely charged polyelectrolytes or highly charged multivalent ions. 14,16,26,41,42 The occurrence of adsorption in this like-charged situation strongly suggests that other forces than electrostatic ones are responsible for this adsorption process.…”
Section: Page 11 Of 25mentioning
confidence: 99%
“…The interaction of cationic and anionic surface active agents with sols and suspensions of silver iodide has recently been extensively studied in these laboratories (1,2,3). The influence of the surface active agent on the stability of preformed sols was examined in detail and theoretical explanations were advanced to account for the experimental details and 1 table (Received June 12, 1962) observations.…”
Section: Introductionmentioning
confidence: 99%