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<p>Experiments are conducted to enhance the interfacial adhesion between a fluoroplastic and rubber. Perfluoroalkoxyalkanes (PFAs) exhibit various favorable properties, such as heat, chemical, and oxidation resistance, but are also known for their poor adhesion properties. Therefore, to improve the adhesion properties between PFA and rubber, we develop a nonthemal plasma surface treatment technology for the surface of PFA. Currently, wet etching is commonly employed. These methods generate liquid waste and environmental problems. To overcome the issues, we investigate a dry surface modification technique using NTP polymerization treatment in an acrylic acid vapor atmosphere. Dielectric barrier discharge treatment is applied to PFA tubes using a cylindrical reactor under an acrylic acid atmosphere, followed by hot-press bonding with white ethylene acrylic elastomer (AEM) rubber. We conducted 180° peeling tests using the treated samples to measure the interfacial peeling strength and assess the fracture mechanism upon peeling. The nonthermal plasma surface treatment significantly enhanced the adhesion between the fluoroplastic tube and rubber, with a maximum peeling strength of ≥ 7 N/mm achieved at discharge powers of 70 and 150 W, with a rubber adherent failure ratio of 80%. A PFA–rubber composite material is successfully prepared with extremely strong adhesion between the layers. Given that fluoroplastics play an important role in cutting-edge industries such as semiconductors, chemicals, electronic machinery, and medicine, This achievement is anticipated to expand their industrial applications in these fields.</p>

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Composite Rubber–Fluoropolymer Tube with Enhanced Interfacial Adhesion via Dielectric Barrier Discharge Induced Polymerization Surface Treatment

  • 期刊论文

  • 发表日期：

    2025年10月24日

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  • Kimrua Ginoza,
  • Tomoya Suda,
  • Shoichi Nishikawa,
  • Tomoharu Nishimura,
  • Tsuyoshi Ida,
  • Tomoyuki Kuroki,
  • Haruhiko Yamasaki,
  • Masaaki Okubo

摘要

Experiments are conducted to enhance the interfacial adhesion between a fluoroplastic and rubber. Perfluoroalkoxyalkanes (PFAs) exhibit various favorable properties, such as heat, chemical, and oxidation resistance, but are also known for their poor adhesion properties. Therefore, to improve the adhesion properties between PFA and rubber, we develop a nonthemal plasma surface treatment technology for the surface of PFA. Currently, wet etching is commonly employed. These methods generate liquid waste and environmental problems. To overcome the issues, we investigate a dry surface modification technique using NTP polymerization treatment in an acrylic acid vapor atmosphere. Dielectric barrier discharge treatment is applied to PFA tubes using a cylindrical reactor under an acrylic acid atmosphere, followed by hot-press bonding with white ethylene acrylic elastomer (AEM) rubber. We conducted 180° peeling tests using the treated samples to measure the interfacial peeling strength and assess the fracture mechanism upon peeling. The nonthermal plasma surface treatment significantly enhanced the adhesion between the fluoroplastic tube and rubber, with a maximum peeling strength of ≥ 7 N/mm achieved at discharge powers of 70 and 150 W, with a rubber adherent failure ratio of 80%. A PFA–rubber composite material is successfully prepared with extremely strong adhesion between the layers. Given that fluoroplastics play an important role in cutting-edge industries such as semiconductors, chemicals, electronic machinery, and medicine, This achievement is anticipated to expand their industrial applications in these fields.