聚四氟乙烯/二氧化硅杂化材料的性能研究  

Performance of PTFE/SiO_2 hybrid materials

作　　者：张冬娜[1] 寇开昌[1] 高攀[1] 侯梅[1] 晁敏[1] 

机构地区：[1]西北工业大学理学院,西安710129

出　　处：《材料科学与工艺》2012年第4期55-60,共6页Materials Science and Technology

基　　金：西北工业大学研究生创业种子基金资助项目(Z200970)

摘　　要：为解决纳米粒子在聚四氟乙烯(PTFE)树脂中难分散均匀的问题,使用PTFE乳液通过原位溶胶-凝胶法(Sol-Gel)制备了聚四氟乙烯/二氧化硅(SiO2)杂化材料,并对其性能进行了表征与研究.研究表明:杂化材料的拉伸强度在SiO2含量为1.05%(记为FS-2)时达到最大值20.96 MPa,为纯PTFE的两倍;断裂伸长率随着SiO2含量的增加而降低,硬度逐渐升高,接触角由121°降至79°.由SEM结果发现,试样FS-2中SiO2的粒径仅为100 nm左右,但随着SiO2含量的增加,粒径变大.杂化材料的耐热性较PTFE有一定提高,当杂化材料中SiO2含量达到5.00%时,热分解温度由纯PTFE的503℃上升至528℃.Based on the hard dispersion of nanoparticles in PTFE （polytetrafluoroethylene） resin, PTFE/SiO2 hybrids were prepared by PTFE emulsion in-site Sol-Gel process, and the performance of hybrids was de- scribed. When the content of SiO2 was 1.05 % （ marked as FS-2 ） , the tensile strength reached a maximum 20.96 MPa, which was twice as much as that of the blank PTFE. With the improvement of SiO2 content, the e- longation at break were reduced ,the hardness increased gradually,and the contact angle decreased from 121° to 79°. The SEM images showed that the diameter of SiO2 in FS-2 was 100 nm,and became larger as the in- creasing of SiO2 content. The heat resistance of hybrids were enhanced when SiO2 content reached 5.00% , and its decomposition temperature was 528℃, while that of blank PTFE was 503℃.

关 键 词：聚四氟乙烯/二氧化硅 杂化材料 溶胶-凝胶法 纳米 分散 

分 类 号：TQ325.4[化学工程—合成树脂塑料工业]