Characterisation of Composites of Bacterial Cellulose and Poly(vinyl alcohol) Obtained by Different Methods

• Autorzy: Długa A. , Kaczmarek H.

Warianty tytułu

PL

Charakterystyka kompozytów celulozy bakteryjnej z poli(alkoholem winylu) otrzymanych różnymi metodami

• Języki publikacji: EN

Abstrakty

EN

Bacterial cellulose (BNC)/poly(vinyl alcohol) (PVA) composites of various component ratios were obtained by three different methods: in situ synthesis of cellulose by Gluconacetobacter xylinus using the modified Schramm Hestrin culture medium mixed with PVA and two ex situ methods. One of them was the impregnation of synthesised BNC with PVA solution at 80 ± 5 °C, and the second one was involved the additional sterilisation of BNC/PVA mixture at 120 °C in an autoclave. It was found that the highest polymer content and basic weight was obtained using the in situ method. Composites obtained by these three methods were characterised by intermolecular interactions of BNC and PVA, which confirmed the FTIR spectroscopy. SEM revealed the internal structure of the composites, where the BNC fibres were partially coated by PVA.

PL

Kompozyty celulozy bakteryjnej (BNC) z poli(alkoholem winylu) o różnym stosunku ilościowym składników otrzymano trzema metodami. Jedną była bezpośrednia synteza celulozy w obecności PVA (in situ) przez bakterie Gluconacetobacter xylinus na podłożu Schramma-Hestrina. Dwie pozostałe metody ex situ różniły się temperaturą i sposobem wprowadzania PVA do BNC. W jednej z nich zastosowano impregnację w temperaturze 80 °C, druga była połączona ze sterylizacją w autoklawie w 120 °C. Największą zawartość polimeru w kompozycie i gramaturę uzyskano metodą in situ. Na postawie badań w podczerwieni stwierdzono występowanie oddziaływań międzycząsteczkowych między BNC i PVA. Mikroskopia elektronowa (SEM) umożliwiła zobrazowanie struktury kompozytu, w której włókna BNC były częściowo pokryte PVA.

Słowa kluczowe

EN

bacterial cellulose; poly(vinyl alcohol); polymer composites; FTIR; SEM

PL

celuloza bakteryjna; polialkohol winylu; kompozyty polimerowe; kompozyty celulozy bakteryjnej (BNC); SEM

• Wydawca: Sieć Badawcza Łukasiewicz - Łódzki Instytut Technologiczny
• Czasopismo: Fibres & Textiles in Eastern Europe
• Rocznik: 2014
• Tom: Vol. 22, no. 6 (108)
• Strony: 69--74
• Opis fizyczny: Bibliogr. 29 poz., rys., tab.

Twórcy

autor

Długa A.

• Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland
• Bowil Biotech Sp. z o.o., Władysławowo, Poland

autor

Kaczmarek H.

• Faculty of Chemistry, Nicolaus Copernicus University, Toruń, Poland

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