高等学校化学学报

高等学校化学学报

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高性能光催化降解聚乙烯薄膜的研究

陈怡1,2, 袁帅1, 施利毅1,3, 朱焕扬2,3, 张剑平3   

    1. 上海大学纳米科学与技术研究中心, 上海 200444;
    2. 上海大学材料科学与工程学院, 上海 200072;
    3. 上海大学理学院, 上海 200444
  • 收稿日期:2007-09-10 修回日期:1900-01-01 出版日期:2008-03-10 发布日期:2008-03-10
  • 通讯作者: 陈怡

Studies on the Photocatalytically Degradable Polyethylene Films

CHEN Yi1,2*, YUAN Shuai1, SHI Li-Yi1,3, ZHU Huan-Yang2,3, 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

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被引次数

19

摘要： 利用酸性蓝BGA染料敏化的纳米TiO2作为光催化剂, 与低密度聚乙烯(LDPE)树脂复合制备了具有可见光催化降解性能的复合塑料薄膜. 采用SEM、FTIR、VHX-100数码显微镜和高温凝胶渗透色谱(HTGPC)等分析技术系统地研究了该塑料薄膜在紫外光和太阳光照射下的降解性能. 探讨了塑料薄膜在光辐照前后的力学性能、质量和分子量变化规律. 研究结果表明, 该薄膜在经紫外线照射5 d后质量损失达到17.6％, 数均分子量由21800降低为5900; 经太阳光照射48 d后质量损失达到12.5％, 分子量降为8100. 辐照后薄膜拉伸强度和断裂伸长率显著降低, 羰基含量升高.

关键词: 染料敏化, 纳米TiO2, 聚乙烯, 光催化, 降解

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(Mn) 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 Mn 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

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