Počet záznamů: 1
Organic-inorganic composites based on magnesium phosphate cement and acrylic latexes: Role of functional groups
- 1.
SYSNO ASEP 0561894 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Organic-inorganic composites based on magnesium phosphate cement and acrylic latexes: Role of functional groups Tvůrce(i) Zárybnická, Lucie (UTAM-F) RID, SAI, ORCID
Machotová, J. (CZ)
Mácová, Petra (UTAM-F) RID, SAI, ORCID
Viani, Alberto (UTAM-F) RID, ORCID, SAICelkový počet autorů 4 Zdroj.dok. Ceramics International. - : Elsevier - ISSN 0272-8842
Roč. 49, č. 3 (2023), s. 4523-4530Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova magnesium phosphate cement ; acrylic latex ; carboxyl groups ; emulsion polymerization Obor OECD Materials engineering CEP GA20-01280S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UTAM-F - RVO:68378297 UT WOS 000907042000001 EID SCOPUS 85139313682 DOI 10.1016/j.ceramint.2022.09.338 Anotace The role of carboxyl functional groups in acrylic latex employed to fabricate an organic-inorganic composite material based on magnesium phosphate cement has been investigated. The acidic nature of the latex aqueous medium enhanced the dissolution of the magnesium oxide in the first stages of the cement reaction. The following increase in pH promoted the deprotonation of the carboxyl groups, which became involved in surface adsorption effects. Adsorption processes were found to control the nucleation and growth of the reaction products. The resulting overall hindering effect slowed down the reaction rates and delayed the precipitation of the solid phosphates with beneficial consequences, namely, the retardation of setting time and the modulation of the heat released. Modification in the morphology of the formed crystals, with the prevalence of platelet-like over prismatic habit, along with a decrease in their average size, was obtained. The crystals formed in higher amounts with respect to the neat cement because the reaction proceeds closer to equilibrium. The obtained microstructure is strengthened because of a more effective intermingling between crystals and the amorphous phase. Furthermore, the synergistic combination of polymer and phosphate cement improved the elastic properties, and
reduced the water absorption, impacting positively on the durability of the composite.Pracoviště Ústav teoretické a aplikované mechaniky Kontakt Kulawiecová Kateřina, kulawiecova@itam.cas.cz, Tel.: 225 443 285 Rok sběru 2023 Elektronická adresa https://doi.org/10.1016/j.ceramint.2022.09.338
Počet záznamů: 1