期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 40, 期 5, 页码 1681-1685出版社
AMER CHEMICAL SOC
DOI: 10.1021/es051173x
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A new type of photodegradable low-density polyethylene (LDPE)-TiO2 nanocomposite film was prepared by a melt blending technique. The photocatalytic degradation of the LOPE-TiO2 nanocomposites was investigated. The as-prepared films were characterized by scanning electron microscopy (SEM), high-temperature gel permeation chromatography (HT-GPC) X-ray photoelectron spectroscopy (XPS), FT-IR spectroscopy, and the photoinduced weight loss. The results show that the LDPE-TiO2 nanocomposite films could be efficiently degraded under UV or sunlight illumination. The weight loss rate of the composite film reached 68.38%, the average molecular weight (M-w) of the composite film decreased 94.56%, and the number of average molecular weight (M-n) decreased 93.75% after UV-light irradiation for 400 h. FT-IR and XPS analysis indicated that the LDPE was oxidized during UV-light irradiation. The photocatalytic degradation mechanism of the films is briefly discussed.
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