Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: foamability

Sortuj według:

Ogranicz wyniki do:

Foams Stabilized with Nanoparticles for Gas Well Deliquification

Knapik E., Stopa J, Marzec A.

Polish Journal of Chemical Technology

2014

Vol. 16, nr 2

114--117

This study examined the interaction of solid nanoparticles and anionic and non-ionic surfactant at an air–water interface. Aqueous foams stabilized by silica nanoparticles in water with different levels of salinity were studied in detail. The stability of solid/surfactant dispersion was evaluated visually. Nanoparticles content impact and concentration of surfactant on the foamability, deliquification of foams and structure of wet foams were studied. It was found that the foamability of dispersion depends either on the surfactant concentration or on the nanoparticles concentration. The adsorption of hydrophobically modified silica particles and surfactants reduces the air/water interface tension. The results of the examinations showed that the use of nanoparticles allows to increase the efficiency of brine unloading even up to 20%. Surfactant particle and nanosilica present synergistic action, use of 4 wt% of nanoparticles allows to reduce surfactant consumption up to half. The cost of the preparation of the proposed dispersion is slightly higher, about 5%, compared to the sole surfactant.

Comparison of Properties of Foaming Concentrates Containing Sodium Dodecyl Sulfate (SDS) and Cetyltrimethylammonium Bromide (CTAB) for Rescue and Decontamination Purposes

Król B., Mizerski A.

Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej

2013

Nr 45 (1)

5--16

The paper presents results of the research of two model and one typical foaming concentrates prepared for rescue operations connected with elimination of chemical and biological contamination. Concentrates include 20% (wt) of surfactants, 25% (wt) of solvent (ethylene glycol monobutyl ether), 2% (wt) of foam stabilizer (1-dodecanol) and 53% (wt) of water. Two surfactants were studed: SDS as the component of the K–1 concentrate and CTAB as the component of the K-2 concentrate. The course of surface tension isotherms, the wetting power and the properties of foams generated by use of the pure foaming solutions and by the same solutions with additions of acids (HCl, H2SO4, CH3COOH), bases (KOH, NaOH, Ca(OH)2) and oxidants (H2O2, ClO2) were tested. The K-1 concentrate (with SDS) had twice higher foaming power than the K-2 concentrate (with CTAB). However foam stability measured as the kinetic of solution drainage was much higher in case of foams generated from CTAB based concentrate. In each case foams showed good resistance to acids, bases and oxidants additives. The disadvantage of CTAB based solutions was their low wetting power.

W artykule przedstawiono wyniki badań dwóch modelowych (K-1, K-2) oraz jednego typowego handlowego preparatu pianotwórczego (S). Są one przeznaczone do działań związanych z usuwaniem zagrożeń chemicznych i biologicznych. Badano wpływ dodatków kwasów, zasad oraz utleniaczy na właściwości roztworów środków pianotwórczych (zdolność zwilżania, zdolność pianotwórcza, trwałość pian).