Wytwarzanie ceramicznych powłok biomedycznych metodą zol-żel

• Autorzy: Pietrzyk B.

Warianty tytułu

EN

Sol-gel preparation of biomedical ceramic coatings

• Języki publikacji: PL

Abstrakty

PL

Praca dotyczy wytwarzania ceramicznych powłok biomedycznych metodą zol-żel i badań podstawowych właściwości tych powłok. Obejmuje ona opracowanie sposobów wytwarzania powłok tlenku tytanu, tlenku glinu i hydroksyapatytu, a także przeprowadzenie badań tych powłok w zależności od warunków wytwarzania. Zawiera także przykłady użycia metody zol-żel do wytworzenia tlenkowych, warstwowych powłok kompozytowych oraz warstwowej powłoki węgiel/hydroksyapatyt, w której warstwa węglowa została wytworzona metodą PACVD. Praca obejmuje ponadto opracowanie nowej metody wytwarzania powłok ceramicznych: wspomaganej plazmowo metody aerozol-żel. Istota tej metody polega na połączeniu techniki zol-żel z techniką plazmy niskotemperaturowej stosowaną do obróbki powierzchni. Opracowana metoda pozwala na przeprowadzenie w jednym reaktorze procesu wytwarzania powłok ceramicznych obejmującego przygotowanie (aktywację) powierzchni podłoża za pomocą obróbki plazmowej, nakładanie powłoki z aerozolu oraz obróbkę plazmową wytworzonej powłoki. Obróbka plazmowa powłok prowadzi do zagęszczania ich powierzchni i może zastąpić wygrzewanie, co zwiększa możliwości kształtowania właściwości wytwarzanych ceramicznych powłok biomedycznych. Rozprawa zawiera 7 rozdziałów, z których pierwsze dwa dotyczą danych literaturowych na temat biomateriałów i metody zol-żel oraz sformułowanie celu pracy, natomiast pozostałe przedstawiają prace własne autorki. Rozdział 3 prezentuje wyniki badań powłok tlenku tytanu, tlenku glinu i hydroksyapatytu obejmujące ich morfologię, budowę chemiczną i krystaliczną, właściwości ochronne i mechaniczne, a także badania oddziaływania ich powierzchni z krwią oraz odporności na zasiedlanie bakteriami E.Coli. Dodatkowo zamieszczono wyniki badań bioaktywności i właściwości fotokatalitycznych tlenku tytanu. Stwierdzono, że stosowany zakres zmienności parametrów wytwarzania pozwala na uzyskanie powłok o korzystnych cechach użytkowych. Rozdział 4 zawiera wyniki badań właściwości ochronnych i przyczepności powłok kompozytowych, wskazujące na poprawę tych właściwości w stosunku do powłok j ednoskładnikowych. Rozdział 5 dotyczy wspomaganej plazmowo metody aerozol-żel i obejmuje opis konstrukcji i działania reaktora oraz wyniki badań budowy chemicznej powłok tlenku tytanu, tlenku glinu i hydroksyapatytu wytwarzanych tą metodą. Prezentowana metoda jest przedmiotem zgłoszenia patentowego i stanowi nowość w skali światowej. Ostatnie dwa rozdziały prezentują najważniejsze wyniki badań i wnioski wynikające z rozprawy.

EN

The paper concerns a production of ceramic biomedical coatings by the sol-gel method and a study of the basic properties of these coatings. The work comprises a development of sol-gel methods for the synthesis of titanium oxide, alumina and hydroxyapatite coatings, as well as performing tests of these coatings properties and their dependence on the parameters of preparation. It also contains examples of an application of the sol-gel method to produce oxide sandwich composite coatings and carbon/hydroxyapatite sandwich coatings. In the latter case, carbon layers are synthesized with the plasma assisted chemical vapor deposition (PACVD) technique. The work further comprises a development of a new way of deposition of ceramic coatings, namely a plasma-enhanced aerosol-gel method. The idea of this method is to combine the sol-gel technique of deposition with the low temperature plasma processing of the sol-coated surface. The developed method allows one to carry out, in a single reactor, the entire manufacturing process comprising: substrate preparation (activation) by plasma treatment, aerosol deposition of ceramic coating and its plasma treatment. Plasma processing of the coatings leads to a densification of their surface and it is a process able to completely replace thermal annealing. It increases a likelihood of creating ceramic coatings having advantageous biomedical properties. The dissertation contains seven chapters. The first two refer to the literature on the subject of biomaterials and the sol-gel method, while the remaining ones present the author's own work. Chapter 3 presents results of morphology, chemical and crystalline structure studies, as well as those of mechanical, protective and biomedical properties of the titanium oxide, alumina and hydroxyapatite coatings. As far as biomedical studies are concerned, they comprise interaction of the coatings surface with blood and their resistance to the colonization by E.Coli bacteria. Additionally, test results of bioactivity and photocatalytic properties of titanium oxide are presented. It was found that the range of variation of operational parameters used in their production, allows one to obtain coatings with advantageous functional characteristic. Chapter 4 presents results of the protective properties and adhesion of composite coatings, indicating an improvement of these properties compared to the single component coating. Chapter 5 concerns the plasma enhanced aerosol-gel method, and it includes a description of the reactor, its construction and operation, as well as results of the studies on chemical structure of the titanium oxide, alumina and hydroxyapatite coatings produced by this method. The method presented is a subject of patent application and it is an innovation on the global scale. The last two chapters present the key findings and conclusions of the dissertation.

Słowa kluczowe

PL

metoda zol-żel; powłoki ceramiczne; materiały biomedyczne; powłoki kompozytowe

EN

sol-gel method; ceramic coatings; biomedical materials; composite coatings

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Zeszyty Naukowe. Rozprawy Naukowe / Politechnika Łódzka
• Rocznik: 2013
• Tom: Z. 446
• Strony: 1--99
• Opis fizyczny: Bibliogr. 122 poz., il. (w tym kolor.), wykr.

Twórcy

autor

Pietrzyk B.

• Instytut Inżynierii Materiałowej Politechniki Łódzkiej

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