Abstract
The preparation of biodegradableUV protective carboxymethyl cellulose (CMC) films using extracted phenolic compounds fromoolong tea (O) as bio-fillers to improve UV-blocking capability has been studied.The properties of the CMC and CMC/O films including color,transmission infrared spectra,moisture uptake, water vapor permeability, thermal properties, tensile properties, %reduction of UV transmittance and biodegradability were examined The total amount of phenolic compounds fromoolong teaextracts was determined as 0.1577 ± 0.0018 g of compound per 15 g of oolong tea powder.The addition ofoolong teaextracts to CMC matrices improved the reduction of UV transmittance of the films. It wasobservedthat CMC/Ofilms with2 % v/voolong teaextracts gave a %reduction of UV transmittance for all UVC, UVB and UVA ranges comparable to that of the oolong teaextracts. Moreover, the addition ofoolong teaextracts led to a decreasein water vapor permeability of the CMC/Ofilms.The results indicated that carboxymethyl cellulosefilms filled withoolong teaextracts have potential for an application of UV radiation reduction packaging.
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