Microwave dielectric properties of PTFE‐Polyacrylate composite films made via aerosol deposition
Microwave dielectric properties of PTFE‐Polyacrylate composite films made via aerosol deposition
复制标题
气溶胶沉积制备的PTFE-聚丙烯酸酯复合薄膜的微波介电性能
DOI：
10.1002/pi.5138
复制
发表时间：
2016
影响因子：
3.2
通讯作者：
C. Luscombe
中科院分区：
文献类型：
--
作者：
S. O'Keefe;C. Luscombe
很少有研究检查使用增材制造的聚四氟乙烯（PTFE）的沉积及其在微波器件中的后续特性。本研究检查了通过气溶胶沉积制成的聚四氟乙烯-聚丙烯酸酯（PTFE-PA）复合膜，以评估PTFE在增材制造工艺中的潜在用途。该复合材料由PTFE‐PA核壳纳米颗粒组成，采用种子乳液聚合法合成，含有高达50%的各种PTFE重量分数。将合成的纳米颗粒喷涂到加热的玻璃基板上，随后在高于PA的玻璃化转变温度且低于PTFE的玻璃化转变温度的温度下退火，从而形成约40 μm厚的固体膜。腔微扰共振技术被用来确定薄膜的复介电常数。随着PTFE体积分数的增加，介电常数的真实的部<$′减小，虚部<$″变化不大。结果表明，将PTFE纳入增材制造工艺，特别是微波器件，是一种很有前途的方法。© 2016化学工业协会
Few studies have examined the deposition of polytetrafluoroethylene (PTFE) using additive manufacturing and their subsequent properties in microwave devices. The present study examines polytetrafluoroethylene‐polyacrylate (PTFE‐PA) composite films made via aerosol deposition to assess the potential use of PTFE in additive manufacturing processes. The composites are composed of PTFE‐PA core − shell nanoparticles, synthesized using a seeded emulsion polymerization, containing various PTFE weight fractions up to 50%. The synthesized nanoparticles were sprayed onto a heated glass substrate and subsequently annealed at a temperature above the glass transition temperature of PA and below that of PTFE, rendering a solid film approximately 40 µm thick. A cavity perturbation resonance technique was employed to determine the complex permittivity of the films. As the volume fraction of PTFE increased, the real part of the permittivityϵ′ decreased while the imaginary part of the permittivityϵ″ showed little variation. The results demonstrate a promising approach for incorporating PTFE into additive manufacturing processes, particularly for microwave devices. © 2016 Society of Chemical Industry