Studies on the Photocatalytically Degradable Polyethylene Films

Chem. J. Chinese Universities

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Studies on the Photocatalytically Degradable Polyethylene Films

CHEN Yi^1,2*, YUAN Shuai¹, SHI Li-Yi^1,3, ZHU Huan-Yang^2,3, ZHANG Jian-Ping³

1. Research Center of Nano-science and Nano-technology, Shanghai University, Shanghai 200444, China;
2. School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
3. College of Sciences, Shanghai University, Shanghai 200444, China

Received:2007-09-10 Revised:1900-01-01 Online:2008-03-10 Published:2008-03-10
Contact: CHEN Yi

Abstract

Abstract: The photocatalytically degradable composite films were synthesized by using low density polyethylene(LDPE) and acid blue BGA sensitized nano-TiO₂. SEM, Digital microscope of VHX-100, FTIR, High temperature gelatin permeation chromatography(HTGPC) and other analytic techniques were used to characterize the films before and after irradiation under UV light or sunlight. The results reveal that the degradation efficiency of sensitized TiO₂/PE composite films was increased greatly. After irradiation under UV light for 5 days, the dye sensitized TiO₂/PE composite film lost 17.6%(mass fraction) weight, and the number-average molecular weight(M_n) decreased from 21800 to 5900. After irradiation under sunlight for 48 days, the dye sensitized TiO₂/PE composite film lost 12.5%(mass fraction) weight, and the M_n decreased to 8100. After irradiation, the tensile strength and elongation at break of the films decreased obviously, and the content of carbonyl increased greatly.

Key words: Dye-sensitization, Nano-TiO₂, Polyethylene(PE), Photocatalysis, Degradatio

CLC Number:

O643.32

TrendMD:

CHEN Yi^1,2*, YUAN Shuai¹, SHI Li-Yi^1,3, ZHU Huan-Yang^2,3, ZHANG Jian-Ping³. Studies on the Photocatalytically Degradable Polyethylene Films[J]. Chem. J. Chinese Universities, doi: .

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Studies on the Photocatalytically Degradable Polyethylene Films

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