Abstract
The objective of this research was to empirically assess the difference in the anti-aging behaviour of the quercetin@cellulose system created by physical and chemical interactions. Therefore, composite samples based on ethylene-norbornene copolymer (EN) filled with treated cellulose were prepared and subjected to the UV-aging. Among others, composite specimens' degradation has been evidenced with carbonyl index (CI) calculated based on Fourier-transform infrared spectra. Being a ratio of the absorbance assigned to CO moiety (1720 cm−1) and the CH group (2900 cm−1), it provided information on the sample oxidation level. Quercetin physical adsorption on cellulose resulted in a reduction of EN composite CI from 0.30 ± 0.03 (UV-aged pristine EN) to 0.04 ± 0.02, while the system based on chemical bonding managed to reduce this value only to the level of approx. 0.20. These results were confirmed with tensile tests. Therefore, clearly presenting the intensified anti-aging behaviour of physically adsorbed quercetin@cellulose.
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