Coadsorption of Cationic–Nonionic Surfactant Mixtures on Polytetra Fluoroethylene (PTFE) Surface

Desai, Tejas R; Dixit, Swati

doi:10.1006/jcis.1996.0248

Cited by 31 publications

(26 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…When the PTFE surface comes into contact with the electrolyte solution, it may acquire negative charge by dissociation of these groups. The association constant (pK a ) for these groups is however low (about 2.5) [21,31] (Table 2) and the binding of counterions to the surface is therefore weak over a wide range of pH [21,31]. Charge regulation of the surface during dynamic interaction is not expected [31] and the PTFE surface may be taken at constant charge.…”

Section: Polytetrafluroethylene (Ptfe) Substratementioning

confidence: 93%

See 1 more Smart Citation

Contribution of different physical forces to the disjoining pressure of a thin water film being pressed by an oil droplet

Kumar

Biswas

2010

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

Section: Polytetrafluroethylene (Ptfe) Substratementioning

confidence: 93%

“…For the oil/water interface we measure the potential using a dynamic light scattering experiment. For the substrates; mica, PTFE and steel, we assume the values of surface potential W as reported by others [4,[15][16][17][18][19][20][21][22][23] 'as a first iteration' estimate.…”

Section: Introductionmentioning

confidence: 99%

Contribution of different physical forces to the disjoining pressure of a thin water film being pressed by an oil droplet

Kumar

Biswas

2010

Journal of Colloid and Interface Science

View full text Add to dashboard Cite

“…Cationic surfactant, cetyltrimethylammonium bromide was obtained from Ranbaxy Fine Chemicals Ltd., India. It was recrystallized twice from an acetone:methanol (3:1) mixture before use [13]. Adsorbent used was a Whatman-40 ash less filter paper (9 cm diameter) from Whatman International Ltd., UK.…”

Section: Methodsmentioning

confidence: 99%

Effect of cationic surfactant on the adsorption characteristics of anionic surfactant on cellulose surface

Paria

Manohar

Khilar

2004

Colloids and Surfaces A: Physicochemical and Engineering Aspect

View full text Add to dashboard Cite

show abstract

“…Among numerous composite surfactant systems, the mixed cationic/nonionic surfactants are notable because they form spontaneous vesicles in the water phase and exert strong synergistic effects. Such synergistic effects can reduce the total amount of reagents used in industry, thereby reducing environmental pollution and economic costs [12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Synergistic Adsorption and Flotation of New Mixed Cationic/Nonionic Collectors on Muscovite

Jiang

Yang

et al. 2017

Minerals

View full text Add to dashboard Cite

Abstract:The mixed cationic collector cetyltrimethylammonium chloride (CTAC) and nonionic collector octanol (OCT) was found to exhibit a synergistic effect on the flotation and adsorption of muscovite. To understand the underlying synergistic mechanism, flotation, contact angle, surface tension, and adsorption measurements were carried out. The results obtained from flotation measurements indicated that the mixed CTAC/OCT exhibits a better collecting ability than CTAC or OCT. The recovery of muscovite with CTAC only rapidly decreased from 97.25% at pH 2.64 to 75.26% at pH 5.82, followed by a flat horizontal at a pH is higher than 6. In contrast, a high recovery of greater than 85% muscovite was observed using mixed CTAC/OCT at α CTAC = 0.67 (the mole ratio of CTAC:OCT = 2:1) over the investigated pH range. From the surface activity parameters (CMC, γ CMC , Γ max , A min ) estimated from surface measurements and interaction parameters (β m , β σ ), in addition to the micellar and interfacial compositions (x m 1 , x σ 1 ) obtained from the theory of regular solutions, a synergistic effect is evident in the mixed micelle and at the water/air interface. Moreover, the mixed CTAC/OCT at α CTAC = 0.67 exhibited the maximum synergistic interaction. The results obtained from surface tension measurements indicated that the mixed CTAC/OCT exhibits considerably higher surface activities compared to single CTAC or OCT. The contact angle results confirmed that the mixed CTAC/OCT is a better collector than the individual CTAC or OCT for the flotation of muscovite. According to the results obtained from adsorption experiments, compared with that of individual CTAC or OCT, the amounts of CTAC and OCT adsorbed on the muscovite surface are considerably increase in the mixed systems because of co-adsorption. Based on these results, the mixed CTAC/OCT exhibits a remarkable synergistic effect during the flotation and adsorption of muscovite.

show abstract

Coadsorption of Cationic–Nonionic Surfactant Mixtures on Polytetra Fluoroethylene (PTFE) Surface

Cited by 31 publications

References 6 publications

Contribution of different physical forces to the disjoining pressure of a thin water film being pressed by an oil droplet

Contribution of different physical forces to the disjoining pressure of a thin water film being pressed by an oil droplet

Effect of cationic surfactant on the adsorption characteristics of anionic surfactant on cellulose surface

Synergistic Adsorption and Flotation of New Mixed Cationic/Nonionic Collectors on Muscovite

Contact Info

Product

Resources

About