Scholarlink

<p>In this work, composite nonwoven materials based on a polyimide derived from pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA), filled with polytetrafluoroethylene (PTFE) particles, were fabricated via electrospinning from aqueous solutions. The use of a water-soluble salt of polyamic acid (SPAA) as a precursor enabled the preparation of stable spinning solutions and allowed thermal imidization to be carried out at a relatively low temperature of 300&#xa0;°C. The introduction of PTFE nanoparticles (0–7 wt.%) resulted in the formation of fibers with diameters ranging from 0.9 to 1&#xa0;µm and a heterogeneous morphology. The investigations showed that the addition of PTFE enhances the thermal stability of the composites, although it causes a slight decrease in their tensile strength and elastic modulus. A key finding is the achievement of an ultra-low dielectric constant (ε), which decreased from 1.55 for the neat polyimide to 1.3 for the composite with 7 wt.% PTFE. The optimal balance of dielectric (<i>ε</i> = 1.4), mechanical, and thermal properties was demonstrated for the composite containing 3 wt.% PTFE. The obtained materials are promising for applications in high-frequency flexible electronics, microelectronics, and the aerospace industry.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Electrospun polyimide/PTFE materials with ultra-low dielectric constants based on the salt of water-soluble polyamic acid PMDA-ODA and aqueous PTFE dispersion

  • 期刊论文

  • 发表日期：

    2026年2月26日

查看全文
  • Almaz Kamalov,
  • Vadim Kraft,
  • Anna Ivanova,
  • Alexey Ivanov,
  • Gleb Vaganov,
  • Elena Popova,
  • Natalia Saprykina,
  • Daria Karpushenkova,
  • Vladimir Yudin

摘要

In this work, composite nonwoven materials based on a polyimide derived from pyromellitic dianhydride (PMDA) and 4,4'-oxydianiline (ODA), filled with polytetrafluoroethylene (PTFE) particles, were fabricated via electrospinning from aqueous solutions. The use of a water-soluble salt of polyamic acid (SPAA) as a precursor enabled the preparation of stable spinning solutions and allowed thermal imidization to be carried out at a relatively low temperature of 300 °C. The introduction of PTFE nanoparticles (0–7 wt.%) resulted in the formation of fibers with diameters ranging from 0.9 to 1 µm and a heterogeneous morphology. The investigations showed that the addition of PTFE enhances the thermal stability of the composites, although it causes a slight decrease in their tensile strength and elastic modulus. A key finding is the achievement of an ultra-low dielectric constant (ε), which decreased from 1.55 for the neat polyimide to 1.3 for the composite with 7 wt.% PTFE. The optimal balance of dielectric (ε = 1.4), mechanical, and thermal properties was demonstrated for the composite containing 3 wt.% PTFE. The obtained materials are promising for applications in high-frequency flexible electronics, microelectronics, and the aerospace industry.