Abstract
AbstractComposite films were successfully prepared from cellulose and two kinds of nanocrystalline TiO2 particles in a NaOH/urea aqueous solution (7.5 : 11 in wt %) by coagulation with H2SO4 solution. The structure, morphology, and properties of the films were characterized by transmission electron microscopy, scanning electron microscopy, X‐ray diffraction, TGA, tensile testing, UV–vis spectroscopy, and antibacterial test. The results indicated that TiO2 particles in a cellulose matrix maintained the original nanocrystalline structure and properties. TiO2(I) (anatase) and TiO2(II) (the mixture of anatase and rutile) particles exhibited a certain miscibility with cellulose. The tensile strength of two kinds of composite films was higher than 70 and 75 MPa, when the content of TiO2(I) and TiO2(II) was 4 and 11 wt %, respectively. The cellulose composite films containing nanocrystalline TiO2 particles displayed distinct antibacterial abilities and excellent UV absorption. This work provides a potential way for preparing functional composite materials from cellulose and inorganic nanoparticles in a NaOH/urea aqueous solution, without a destruction of the structure and properties of the particles. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 3600–3608, 2006
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