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    Papers in International JournalsChapters/ Papers in International BooksChapters/ Papers in National BooksCommunications in International ConferencesCommunications in National ConferencesMSc ThesesBooksProceedingsPatentsTechnical/ Scientific ReportsPhD Theses
    @JournalArticle {2781,
    	title = {A comparative study on the properties of potentially bioactive glasses obtained by sol-gel technique and by melting mixtures of oxides},
    	journal = {The Scientific Bulletin of Valahia University {\textendash} Materials and Mechanics},
    	volume = {15},
    	year = {2017},
    	month = {2017-12-01 00:00:00},
    	pages = {18-24},
    	abstract = {

    Phosphocalcic glasses, based on ternary system SiO2 - CaO- P2O5 and those doped with copper (SiO2 {\textendash} CaO - P2O5 -Cu2O) can be obtained by the traditional method of sub-cooling melts or modern methods such as process that uses mechanical energy, neutrons action, deposition in thin layers or by sol-gel technique. This paper shows the experimental results of threecompositional phosphocalcic glasses: 50\% SiO2 - 43\% CaO - 7\% P2O5 , 50\% SiO2 - 38\% CaO - 7\% P2O5 - 5\% Cu2O obtained through sol-gel method and 45\% SiO2 - 22.5\% CaO - 22.5 Na2O - 5\% P2O5 - 5\% Cu2O obtained by melting. In order to study their bioactivity, the three compositions were structural analyzed by X-ray diffraction method. In this case the apatite formation washighlighted after soaked in simulated body fluid, but also other compounds (CaCO3 and CuO) resulting from the same process were observed. In case of the melting glass apatite formation has not been highlighted. The functional groups present in the structure of glasses before and after soaking (PO43-, CO32- and HO-) were highlighted by the Fourier Transform Infrared Spectroscopy (FTIR). The elemental chemical composition was confirmed by elemental analysis WD-XRF. The morphology of sol-gel glass powders was revealed by SEM analysis. All glass compositions were tested in terms of antibacterial activity in vitro.

    }, keywords = {antibacterial activity, copper, FTIR, phosphocalcic glasses, SEM, WD-XRF, XRD}, issn = {2537-3161; 1844-1076}, doi = {10.1515/bsmm-2017-0013}, author = {Avrami, D. and Ungureanu, D. and Angelescu, N. and Aguiar, J. B.} }

    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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    Centro de Território, Ambiente e Construção
    Escola de Engenharia da Universidade do Minho
    Campus de Azurém
    4800-058 Guimarães, Portugal

    Phone: + 351 253 510 200 (517 206)
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    Email: geral@ctac.uminho.pt


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