SiO_(2)改性BaSO_(4)制备及对PVC力学性能的影响  

The Preparation of SiO_(2) Modified BaSO_(4) Composites and Its Effect on the Mechanical Properties of PVC

作　　者：杨强[1,2] 樊国栋[2] 谢贤菲[3] 王瑞欢 屈佳 龚伟[1] 崔孝炜 Yang Qiang;Fan Guodong;Xie Xianfei;Wang Ruihuan;Qu Jia;Gong Wei;Cui Xiaowei(Shaanxi Key Laboratory of Comprehensive Utilization of Tailing Resources,Shangluo University,Shangluo,Shaanxi 726000;College of Chemistry and Chemical Engineering,Shaanxi University of Science&Technology,Xi’an,Shaanxi 710021;State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou,Gansu 730050)

机构地区：[1]商洛学院陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]陕西科技大学化学与化工学院,陕西西安710021 [3]兰州理工大学有色金属先进加工与再利用国家重点实验室,甘肃兰州730050

出　　处：《非金属矿》2021年第4期30-33,共4页Non-Metallic Mines

基　　金：陕西省教育厅重点实验室项目(19JS024);陕西省自然科学基础研究计划(2021JQ-839)。

摘　　要：基于溶胶-凝胶法,合成SiO_(2)改性BaSO_(4)复合材料,利用傅里叶红外光谱(FT-IR)仪、X射线衍射(XRD)仪、扫描电镜(SEM)和粒度分析仪等对其结构与性能进行表征,分析改性BaSO_(4)复合材料的粒径分布、沉降时间和活化度,并将其添加在PVC中,进一步研究改性BaSO_(4)对PVC基材力学性能的影响。结果表明,SiO_(2)复合量为1.4~1.6 mol时,改性BaSO_(4)复合材料的粒径分布较窄且均匀,与未改性样品相比,当SiO_(2)复合量为1.4 mol时,其沉降时间和活化度达到最大值27.8 h和81.8%,分别提高25.5 h和48.5百分点。改性BaSO_(4)有助于提高PVC基材力学性能,当添加量为10%时,改性BaSO_(4)/PVC复合材料综合力学性能最佳,撕裂强度可达156.78 MPa。In this work,a SiO_(2)modified BaSO_(4)composite material was synthesized based on the sol-gel method,the structure and performance was characterized by FT-IR,XRD,SEM and particle size analyzer.On this basis,the particle size distribution,sedimentation time and activation degree of the modified BaSO_(4)composites were analyzed,and the effect of modified BaSO_(4)on the mechanical properties of PVC substrates was further studied.The results showed that when the content of SiO_(2)was 1.4-1.6 mol,the particle size distribution of the modified BaSO_(4)composite was narrow and uniform,when the amount of SiO_(2)was 1.4 mol,compared with the unmodified sample,the sedimentation time and activation degree reached 27.8 h and 81.8%,which were increased by 25.5 h and 48.5 percentage point,respectively.The mechanical performance experiment showed that the modified BaSO_(4)filler help to improve the mechanical properties of the PVC substrate.When the addition amount was 10%,the modified BaSO_(4)/PVC composite had the best comprehensive mechanical properties,the tear strength could reach 156.78 MPa.

关 键 词：BaSO_(4) PVC 撕裂强度 改性 

分 类 号：TB332[一般工业技术—材料科学与工程]