摘要
Abstract
The surface of nano-silica(SiO2)was modified with 3-aminopropyltriethoxysilane(APTES),and the functionalized SiO2 nanoparticles were incorporated into the polypropylene(PP)matrix.The PP composites with different mass fractions of functionalized SiO2 nanoparticles(0,1%,3%,5%and 7%)were characterized by thermogravimetric analysis(TG),UV photodegradation experiments,biodegradation tests,and mechanical property tests.The results showed that the addition of functionalized SiO2 significantly enhanced the degradation properties of the PP composites.The sample with 5%SiO2 exhibited a mass loss rate of 5%in the UV photodegradation experiment,an increased CO2 release of 40.0 mg CO2/g sample in the biodegradation test,and an elevated initial degradation temperature from 350℃of pure PP to 365℃in the thermal degradation experiment,with a char yield of 7.2%.However,the sample with 7%SiO2 experienced a slight decline in performance due to particle agglomeration.The study demonstrated that the functionalized SiO2 performed well within the mass fraction range of 3%to 5%,significantly improving the degradation properties of PP.The experiments provide a basis for the development of environmentally friendly PP materials.关键词
二氧化硅/3-氨基丙基三乙氧基硅烷/聚丙烯/降解性能Key words
SiO2/APTES/PP/Degradation performance分类
化学化工
