Temat: water/liquid interface - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Właściwości i struktura wody na granicach międzyfazowych
Properties and structure of water at interfaces
Autorzy:: Paluch, Maria
Powiązania:: https://bibliotekanauki.pl/articles/972292.pdf
Data publikacji:: 2019
Wydawca:: Polskie Towarzystwo Chemiczne
Tematy:: granica faz woda/powietrze
granica faz woda/ciecz
granica faz woda/ciało stałe
water/air interface
water/liquid interface
water/solid interface
Opis:: The purpose of this paper is to show development of investigations concerning the properties of water at the water/air, water/insoluble liquid and water/solid interfaces. The special attention was drawn on structure and forces acting at those interfaces.
Źródło:: Wiadomości Chemiczne; 2019, 73, 7-8; 491-503
0043-5104
2300-0295
Pojawia się w:: Wiadomości Chemiczne
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Adsorption of natural surfactants present in sea waters at surfaces of minerals: contact angle measurements
Autorzy:: Mazurek, A.
Pogorzelski, S.J.
Boniewicz-Szmyt, K.
Powiązania:: https://bibliotekanauki.pl/articles/48416.pdf
Data publikacji:: 2009
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: mineral
Baltic Sea
natural surfactant
solid-liquid interface
Gdansk Gulf
film pressure
contact angle hysteresis
film-covered surface
sea water
adsorption
Opis:: The wetting properties of solid mineral samples (by contact angles) in original surfactant-containing sea water (Gulf of Gdańsk,Ba ltic) were characterised under laboratory conditions on a large set (31 samples) of well-classified stones of diverse hydrophobicity using the sessile drop (ADSA-P approach),ca ptive bubble and inclined plate methods. An experimental relation between the static contact angle θeq and stone density ρ was obtained in the form θeq = Bρ + C,wher e B = 12.23 ± 0.92, C = −(19.17 ± 0.77),an d r2 = 0.92. The histogram of θeq distribution for polished stone plates exhibited a multimodal feature indicating that the most abundant solid materials (hydrophilic in nature) have contact angles θeq = 7.2,10. 7,15. 7 and 19.2◦,whic h appear to be applicable to unspecified field stones as well. The contact angle,a pH-dependent quantity,ap pears to be a sensitive measure of stone grain size,e.g . granite. The captive bubble method gives reproducible results in studies of porous and highly hydrophilic surfaces such as stones and wood. The authors consider the adsorption of natural sea water surfactants on stone surfaces to be the process responsible for contact angle hysteresis. In the model,an equation was derived for determining the solid surface free energy from the liquid’s surface tension γLV; it also enabled the advancing θA and receding θR contact angles of this liquid to be calculated. Measurements of contact angle hysteresis Δθ(= θA − θR) with surfactant-containing sea water and distilled water (reference) on the same stone surfaces allowed the film pressure ΔΠ (1.22 to 8.80 mJ m−2), solid surface free energy ΔγS (−17.03 to −23.61 mJ m−2) and work done by spreading ΔWS (−1.23 to −11.52 mJ m−2) to be determined. The variability in these parameters is attributed to autophobing,an effect operative on a solid surface covered with an adsorptive layer of surfactants. The wetting behaviour of solid particles is of great importance in numerous technological processes including froth flotation,d emulgation,an ti-foaming procedures and the coal industries. It is believed that the approach presented here and the examples of its application to common sea water/solid mineral systems could be successfully adapted to optimise several surfactant-mediated adsorption processes (see below) of practical value in natural water ecology.
Źródło:: Oceanologia; 2009, 51, 3; 377-403
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "water/liquid interface" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język