TiO<sub>2</sub>-(线性低密度聚乙烯-g-马来酸酐)/低密度聚乙烯薄膜的制备及其光催化降解性能

TiO₂-(线性低密度聚乙烯-g-马来酸酐)/低密度聚乙烯薄膜的制备及其光催化降解性能

摘要: 以线性低密度聚乙烯（LLDPE）-g-马来酸酐（MA）作为相容剂制备了可光催化降解的TiO₂-（LLDPE-g-MA）/LDPE薄膜。采用SEM、XRD、FT-IR对制备的TiO₂-（LLDPE-g-MA）/LDPE薄膜样品进行了表征。由于引入的LLDPE-g-MA改善了纳米TiO₂与LDPE之间的相容性，TiO₂-（LLDPE-g-MA）/LDPE薄膜具有更高的伸长率。SEM结果显示，LLDPE-g-MA显著削弱了纳米TiO₂在LDPE中的团聚，使高分散度的纳米TiO₂具备更高的光催化降解效率，增加了降解过程中的膜质量的损失。

Abstract: The TiO₂-linear low density polyethylene (LLDPE)-g-maleic anhydride (MA)/low density polyethylene (LDPE) film with photocatalytic degradation property was prepared by blending LLDPE-g-MA. The SEM, XRD and FT-IR were employed to characterize the properties of the prepared TiO₂-(LLDPE-g-MA)/LDPE samples. The prepared TiO₂-(LLDPE-g-MA)/LDPE film possesses higher elongation which could be attributed to the promoted the interphase force between the nanoTiO₂ and LDPE. The SEM images demonstrate that the agglomeration of nanoTiO₂ is obviously reduced. Therefore, the nanoTiO₂ with higher dispersibility performs higher photocatalytic degradation efficiency and causes higher mass loss of TiO₂-(LLDPE-g-MA)/LDPE film.