Mechanical reinforcement and UV ageing resistance of SiO2/C hybrid on poly(butylene adipate‑co‑terephthalate) film

Abstract

The hollow SiO2/C hybrid was prepared through a combined soft-templated sol–gel approach and calcination method, and applied in poly(butylene adipate-co-terephthalate) (PBAT) film. The initial elongation at breaks and tensile strength of the PBAT film loaded 4phr SiO2/C hybrid were increased by 34% and 71%, respectively, compared to that containing naked SiO2. The combination of carbon with SiO2 mainly facilitated the homogenous dispersion and better substantial interfacial adhesion in PBAT matrix. Furthermore, a release experiment of the SiO2/C/1130 showed that a small amount of [3-[3-(2H-Benzotriazol-2-yl)-5-(1,1-dimethylethyl)-4-hydroxyphenyl]-1-oxopropyl]-hydroxypoly(oxo-1,2-ethanediyl) (UV1130) was absorbed by the SiO2/C hybrid, which could furtherly improve the dispersion of hybrid in PBAT matrix and UV resistance. The work provides a promising method to reinforce PBAT composites and prepare UV-resistant PBAT films simultaneously.