Microwave assisted synthesis of bacterial cellulose-calcium carbonate composites

•Bacterial cellulose-calcium carbonate composites were obtained by MW irradiation.•Calcite and vaterite were identified from the polymorphs of calcium carbonate.•The composites obtained could be used for medical and industrial applications. The effect of microwave irradiation on the calcium carbonat...

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Bibliographic Details
Published in:Industrial crops and products 2013-10, Vol.50, p.414-422
Main Authors: Stoica-Guzun, Anicuta, Stroescu, Marta, Jinga, Sorin Ion, Jipa, Iuliana Mihaela, Dobre, Tanase
Format: Article
Language:English
Subjects:
aqueous solutions
atmospheric pressure
Bacteria
Bacterial cellulose
Calcite
Calcium carbonate
Calcium chloride
Cellulose
exposure duration
Fourier transform infrared spectroscopy
Fourier transforms
Infrared spectroscopy
Irradiation
Microwave
microwave treatment
Microwaves
scanning electron microscopy
sodium carbonate
sodium chloride
Vaterite
water vapor
X-ray diffraction
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Summary:•Bacterial cellulose-calcium carbonate composites were obtained by MW irradiation.•Calcite and vaterite were identified from the polymorphs of calcium carbonate.•The composites obtained could be used for medical and industrial applications. The effect of microwave irradiation on the calcium carbonate (CaCO3) deposition on bacterial cellulose (BC) membranes was investigated. The experiments were conducted at atmospheric pressure using calcium chloride and sodium carbonate aqueous solutions as starting reactants. The following parameters varied: the exposure time at microwave irradiation and the concentrations of calcium chloride starting solutions. The BC-CaCO3 composites were characterized by means of scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). From the known polymorph of calcium carbonate, calcite and vaterite were deposed on bacterial cellulose membranes in the presence of microwave irradiation doses which were used in this work. Water vapor permeability and pencil scratch hardness were investigated for BC-CaCO3 composites and compared with control samples obtained without microwave irradiation. Significant differences between morphology and even polymorphism of the calcium carbonate crystals were observed for the irradiated samples in comparison with those obtained in the absence of microwave irradiation.
ISSN:0926-6690
1872-633X
DOI:10.1016/j.indcrop.2013.07.063