Baza Publikacji Pracowników Politechniki Lubelskiej

Status:
Autorzy:	Kalbarczyk Marta, Skupiński Sebastian, Kosmulski Marek
Dyscypliny:
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Rok wydania:	2024
Wersja dokumentu:	Drukowana \| Elektroniczna
Język:	angielski
Wolumen/Tom:	397
Numer artykułu:	124195
Strony:	1 - 9
Impact Factor:	5,3
Web of Science® Times Cited:	2
Scopus® Cytowania:	2
Bazy:	Web of Science \| Scopus
Efekt badań statutowych	NIE
Finansowanie:	This research was supported by Lublin University of Technology,grant numbers FD-EE-407 (Marek Kosmulski) and FD-20-EE-2/420 (Marta Kalbarczyk).
Materiał konferencyjny:	NIE
Publikacja OA:	NIE
Abstrakty:	angielski
	Hypothesis: Amino functionalization is an efficient method of production of highly charged and finely dispersed particles of silica in water. We hypothesize that amino-functionalized silica has positive zeta potential and low degree of aggregation also in glycol and in aqueous glycol. Method: Eight lots of amino-functionalized silica were prepared by different methods. The lot which showed the highest isoelectric point IEP in water was used in experiments with glycol. The particles were dispersed in glycol and in aqueous glycol and the zeta potential and particle size were measured as a function of elapsed time. On top of pH-neutral dispersions, dispersions acidified with HCl and with acetic acid were also studied. Results: In water and in dilute (up to 30%) glycol, amino-functionalized silica undergoes hydrolysis, which results in decrease in positive zeta potential and increase in particle size. In more concentrated glycol the particles have a stable high positive zeta potential and low particle size for at least 1 month. The positive zeta potential can be enhanced by addition of acid.

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Amino-functionalized silica as a component of heat-transfer fluids

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