作　　者： ; ; ;

机构地区： 青海大学化工学院

出　　处： 《中国塑料》 2014年第9期61-65,共5页

摘　　要： 通过原位聚合法在金红石型纳米二氧化钛(TiO2)表面接枝硅烷偶联剂,研究纳米粒子粒径、偶联剂种类及偶联剂用量对改性效果的影响。结果表明,纳米TiO2粒径越小,与偶联剂作用的面积越多,吸附能力越强,TiO2的亲油改性效果就越好;选用KH-570作为偶联剂时,纳米TiO2的亲油改性效果最佳,且最佳用量为10mL;扫描电子显微镜照片和红外光谱显示纳米粒子与偶联剂通过化学作用结合,改性后的纳米TiO2粒子团聚减少,分散性提高;用改性后的纳米TiO2粒子制备的聚氯乙烯(PVC)/TiO2膜的力学性能和抗紫外性能得到有效提高。 Rutile TiO2 silane was grafted with coupling agent onto the surface by in situ polymerization.The effect of particle size and the dosage of coupling agent was studied.It was found that the smaller the TiO2 particle size and the larger the functionality of the coupling agent,the higher the degree of modification.When the coupling agent was KH-570,the optimal loading was 10 mL.Scanning electron microscopy(SEM)and IR spectra showed that the coupling agent and nanoparticles were linked chemically.The surface modification of nanoparticles reduced the agglomeration,and thus enhanced the dispersion.When introduced into PVC film,the mechanical properties and UV resistance were effectively improved.

关 键 词： 聚氯乙烯 纳米二氧化钛 紫外屏蔽 老化

领　　域： [一般工业技术]