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Low-Temperature Thermocatalytic Degradation of Polyethene Films by Nano-Titanium Dioxide in Water

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Abstract:

nanoTiO2 powders were utilized as thermocatalyst for catalytic degradation of polyethylene in water. LDPE/TiO2 composite films were prepared by the method of melt blending. The aging experiments were conducted in ovens under temperatures of 30 °C, 40 °C and 50 °C, respectively. The thermocatalytic degradation behavior towards the composite films was characterized by fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TG) and scanning electron microscopy (SEM). Results show that both pure LDPE films and LDPE /TiO2 composite films can be degraded even under low temperatures in water. After thermal degradation for 90 days at 50 °C, the composite film with 2wt% nanoTiO2 was oxidized the most acutely: the quantity of branched chains decreased to some extent and lots of small molecules were detected, the decomposition temperature was also reduced by 28.2 °C. Besides, the surface of the films became rougher than that of the film before degradation.

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Periodical:

Materials Science Forum (Volume 804)

Pages:

47-50

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.804.47

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Online since:

October 2014

Authors:

Ke Li*, Xue Gang Luo, Mian Wang, Fang Wei Qi, Pei Wu, Qiu Feng Meng

Keywords:

Degradation, Low-Temperature, Nano-Titanium Dioxide, Polyethylene, Thermocatalytic

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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