CAJ | 학술논문

通过原位聚合法在金红石型纳米TiO2表面包覆硅烷偶联剂,研究超声波处理时间、水浴时间及溶液的pH值对改性效果的影响。结果表明：当超声时间为60min、水浴时间为2h、溶液的pH=6时,其改性效果最佳；采用扫描电镜、X射线衍射、差示扫描量热分析法、紫外-可见分光光度计、氧指数测试仪等手段对试样进行表征,结果显示：纳米TiO2与偶联剂之间的结合为化学结合,改性后的纳米粒子分散性得到了提高,当纳米TiO2添加量为3%时,PVC/KH570-TiO2复合材料的阻燃性能与机械性能最佳。
통과원위취합법재금홍석형납미TiO2표면포복규완우련제,연구초성파처리시간、수욕시간급용액적pH치대개성효과적영향。결과표명：당초성시간위60min、수욕시간위2h、용액적pH=6시,기개성효과최가；채용소묘전경、X사선연사、차시소묘량열분석법、자외-가견분광광도계、양지수측시의등수단대시양진행표정,결과현시：납미TiO2여우련제지간적결합위화학결합,개성후적납미입자분산성득도료제고,당납미TiO2첨가량위3%시,PVC/KH570-TiO2복합재료적조연성능여궤계성능최가。
The silane coupling agent was grafted on the surface of rutile TiO2 by in situ polymerization. Ultrasound,bain-marie and the different kinds of pH were studied to evaluate the modified results. It was found that the optimum surface modification conditions were determined:the ultrasound was 60min,bain-marie was 2h and pH=6. The samples before and after modification were charac-terized by SEM, XRD, DSC, UV-Vis and so on. The results showed that coupling agent combines nanoparticles by chemical ac-tion. The reunion of nanoparticles was decreased after modification. Therefore the dispersion of particles was enhanced. Mechanical properties and oxygen index of PVC/KH570-TiO2 were effectively improved at the content of modified TiO2(3%wt).