Possible time-dependent effect of ions and hydrophilic surfaces on the electrical conductivity of aqueous solutions

Nada Verdel (Avtor), Igor Jerman (Avtor), Rok Krašovec (Avtor), Peter Bukovec (Avtor), Marija Zupančič (Avtor)

Povzetek

The purpose of this work was to determine the influence of mechanical and electrical treatment on the electrical conductivity of aqueous solutions. Solutions were treated mechanically by iteration of two steps: 1:100 dilution and vigorous shaking. These two processes were repeated until extremely dilute solutions were obtained. For electrical treatment the solutions were exposed to strong electrical impulses. Effects of mechanical (as well as electrical) treatment could not be demonstrated using electrical conductivity measurements. However, significantly higher conductivity than those of the freshly prepared chemically analogous solutions was found in all aged solutions except for those samples stored frozen. The results surprisingly resemble a previously observed weak gel-like behavior in water stored in closed flasks. We suggest that ions and contact with hydrophilic glass surfaces could be the determinative conditions for the occurrence of this phenomenon.

Ključne besede

anorganska kemija;fizikalna kemija;molekule;voda;struktura;vodne raztopine;tekočine;električna prevodnost;hidrofobnost;hidrofobne površine;avtotiksotropija;zelo razredčene raztopine;šibki geli;ioni;autothixotropy;conductivity;exclusion zone;extremely dilute solutions;water;

Podatki

Jezik:	Angleški jezik
Leto izida:	2012
Tipologija:	1.01 - Izvirni znanstveni članek
Organizacija:	UL FKKT - Fakulteta za kemijo in kemijsko tehnologijo
UDK:	546.212:544.35:544.022.822
COBISS:	35901957
ISSN:	1661-6596
Št. ogledov:	258
Št. prenosov:	55
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Slovenski jezik
Sekundarne ključne besede:	anorganska kemija;fizikalna kemija;molekule;voda;struktura;vodne raztopine;tekočine;električna prevodnost;hidrofobnost;hidrofobne površine;avtotiksotropija;zelo razredčene raztopine;šibki geli;ioni;
Vrsta dela (COBISS):	Članek v reviji
Strani:	str. 4048-4068
Letnik:	ǂVol. ǂ13
Zvezek:	ǂno. ǂ4
Čas izdaje:	2012
DOI:	10.3390/ijms13044048
ID:	13310989