摘要
采用涂覆工艺制备聚四氟乙烯/二氧化钛(PTFE/TiO_(2))复合薄膜,针对TiO_(2)粉体密度大容易沉降问题,探究浆料总量、浆料黏度、涂覆速率的压力差等因素对成膜厚度均匀性的影响。结果表明:在涂覆速度为0.20 m/s条件下,浆料黏度范围为969~1139 mPa·s(测试转速20 r/min)时,制备了目标厚度(55±10)μm的PTFE/TiO_(2)复合薄膜。通过扫描电镜观察,PTFE/TiO_(2)复合薄膜的表面均匀平整,TiO_(2)分散性良好,成膜质量良好。复合薄膜的相对介电常数、薄膜拉伸强度、断裂伸长率的离散系数均≤5%,证明制备的薄膜的介电性能和力学性能一致性良好。
Polytetrafluoroethylene/titanium dioxide(PTFE/TiO_(2))composite films were prepared by coating process.Aiming at the problem that TiO_(2) powder is easy to settle due to its high density,the effects of total slurry amount,slurry viscosity and pressure difference of coating rate on the uniformity of film thickness were investigated.The results show that the PTFE/TiO_(2) composite film with a target thickness of(55±10)μm is prepared at a coating speed of 0.20 m/s and a slurry viscosity range of 969~1139 mPa·s(test speed is 20 r/min).The surface of PTFE/TiO_(2) composite film is uniform and smooth,the dispersion of TiO_(2) is good,and the film quality is good.The dispersion coefficients of relative dielectric constant,tensile strength and elongation at break of the composite films are all≤5%,which proves that the dielectric properties and mechanical properties of the prepared films are in good agreement.
作者
金霞
冯春明
贾倩倩
张立欣
JIN Xia;FENG Chun-ming;JIA Qian-qian;ZHANG Li-xin(The 46th Research Institute of China Electronics Technology Group Corporation,Tianjin 300220,China)
出处
《塑料科技》
CAS
北大核心
2023年第4期59-63,共5页
Plastics Science and Technology
关键词
涂覆工艺
聚四氟乙烯
黏度
厚度均匀性
相对介电常数
力学性能
Coating process
Polytetrafluoroethylene
Viscosity
Thickness uniformity
Relative dielectric constant
Mechanical properties
