化工进展2018，Vol.37Issue(1)：195-200,6.DOI:10.16085/j.issn.1000-6613.2017-0538
有机改性金红石型纳米TiO2对聚乙醇酸抗光老化性能的研究
Study on photo-oxidative resistance of polyglycolic acid modified with organic nano-rutile-TiO2
摘要
Abstract
The surface of nano-rutile-TiO2was modified by silane coupling reagent A-172 and the TiO2 were characterized by FTIR and TEM techniques. According to the spectra of FTIR,it can be inferred that the A-172 was bound on the surface of nanosized TiO2. Transmission electron microscopy pictures showed that the hydrophobicity of nanosized TiO2modified with A-172 was improved. The modified nano-TiO2 (0.5%,1%,1.5% and 2%)was added to polyglycolic acid(PGA)as the ultraviolet ray shielding,and a series of PGA composites were prepared. The accelerated aging test of pure PGA and PGA/nano-TiO2 composites was carried out with laboratory xenon arc lamp. The results showed that the modified nano-TiO2could be well dispersed in PGA so that the PGA had a wider UV absorption range and a stronger UV absorption peak. And the aging resistance of PGA was remarkably improved. The modification effect was optimum when the mass fraction of modified nano-TiO2was 1.5%,and the yellowness index of modified PGA just increased 4.1. Tensile strength and notched impact strength retention rate were 56.34% and 65.15%,respectively,increased by 42.29% and 37.21%. And weight average molecular weight and number average molecular weight retention were also increased by 33.64% and 33.99%,respectively.关键词
金红石型纳米TiO2/表面/聚乙醇酸/分散/加速老化Key words
nano-rutile-TiO2/surface/polyglycolic acid(PGA)/dispersion/accelerated aging分类
化学化工引用本文复制引用
崔爱军,辛健,蔡煜明,薛士瀚,朱晨浩,韦梅俊,陈群..有机改性金红石型纳米TiO2对聚乙醇酸抗光老化性能的研究[J].化工进展,2018,37(1):195-200,6.基金项目
江苏产学研前瞻项目(BY2014037-17). （BY2014037-17）
