✦ LIBER ✦

Nonionic Fluorosilicone Surfactants

✍ Scribed by Hideki Kobayashi; Michael J. Owen

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 299 KB
Volume: 156
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.1993.1131

No coin nor oath required. For personal study only.

✦ Synopsis

New fluorosilicone surfactants have been prepared. The focus has been on branched disiloxane and trisiloxane hydrophobes having 3,3,3-trifluoropropyl and 3,3,4,4,5,5,6,6,6-nonafluorohexyl radicals with poly(oxyethylene) hydrophiles. Their performance as aqueous surfactants was evaluated and compared to conventional methylsiloxane surfactants of similar structure. Critical micelle concentrations and equilibrium and dynamic aqueous surface tensions were measured. The behavior parallels that of the related fluorosilicone polymers in the liquid rather than in the solid state. The trifluoropropyl surfactants are less effective at lowering equilibrium aqueous surface tension, while the nonafluorohexyl surfactants have similar effectiveness to the methyl surfactants. Wettability tests were also carried out on polyethylene films. The wetting power generally correlated with equilibrium surface tension lowering ability. 1993 Academic Press, Inc.

📜 SIMILAR VOLUMES

Novel nonionic siloxane surfactants

✍ R Wersig; G Sonnek; C Niemann 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 489 KB

A new method for ethoxylation without application of pressure is described. Butynediololigo(oxyethy1ene) [H(OCH2CH2),-OCH2-C= C-CH20(CH2CH,0),H with n = 1-16] has been prepared in the presence of an electrophilic catalyst in a specially developed reciruculating apparatus. The products have been char

Fluorosilicone antifoams

✍ Michael J. Owen; Julianne L. Groh 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 496 KB

Antifoam compositions for aqueous surfactants are usually emulsions of insoluble oils containing hydrophobic solids. The emulsion allows easy access to the aqueous environment. The oil droplets carry the solid particles to the foam interfaces by spreading, which also contributes to foam rupture. The

Adsorption of Nonionic Surfactants on Ka

Adsorption of Nonionic Surfactants on Kaolins

✍ A. Tahani; H.Van Damme; C. Noik; P. Levitz 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 169 KB

tants on a hydrophilic silica surface using neutron reflection Adsorption of nonionic surfactant on kaolins of different origins confirmed the previous experimental results (12). All of was studied. The shape of the isotherm differs only slightly acthese works show that the adsorption mechanism of n

Thermal stability of nonionic polyoxyalk

Thermal stability of nonionic polyoxyalkylene surfactants

✍ E. Santacesaria; D. Gelosa; M. Di Serio; R. Tesser 📂 Article 📅 1991 🏛 John Wiley and Sons 🌐 English ⚖ 558 KB

Phase behavior in water/nonionic surfact

Phase behavior in water/nonionic surfactant/hydrocarbon and water/nonionic surfactant/amphiphilic oil systems

✍ Hironobu Kunieda 📂 Article 📅 1989 🏛 Elsevier Science 🌐 English ⚖ 507 KB

Membrane ultrafiltration of a nonionic s

Membrane ultrafiltration of a nonionic surfactant

✍ R. B. Grieves; D. Bhattacharyya; W. G. Schomp; J. L. Bewley 📂 Article 📅 1973 🏛 American Institute of Chemical Engineers 🌐 English ⚖ 946 KB

## Abstract Aqueous solutions 1.65 × 10^−4^ to 1.10 × 10^−2^ molar in the nonionic surfactant Triton X‐100 are subjected to membrane ultrafiltration over the temperature range of 22 to 50°C in a continuous flow, thin channel cell, with channel Reynolds numbers from 50 to 1175. Data for the ultrafil