表面技術
Online ISSN : 1884-3409
Print ISSN : 0915-1869
65 巻 , 5 号
選択された号の論文の6件中1~6を表示しています
小特集/表面処理と知財/特許
総説
解説
研究論文
  • 是津 信行, 山村 和也, 井筒 祐志, 我田 元, 大石 修治, 手嶋 勝弥
    2014 年 65 巻 5 号 p. 227-233
    発行日: 2014/05/01
    公開日: 2015/05/01
    ジャーナル フリー
    Polytetrafluoroethylene (PTFE) is used in quake-absorbing structures because of its low friction characteristic. Because of its low surface energy, however, a pristine PTFE surface exhibits difficulty adhering to other substances. Consequently, PTFE surface normally requires some pretreatment such as chemical modification before adhesion. We herein propose a new surface modification route for adhesion enhancement of PTFE/epoxy resin interfaces using plasma-assisted morphological and molecular designs. Plasma processing methods under air and in water were used to introduce the peroxide radical and porous structures onto the PTFE surface. Subsequently, a polyethyleneimine derivative having primary amino groups at the molecular end in the side-chain was chemically modified by graft copolymerization to introduce reactive functional groups on the surfaces against epoxy resin-based glue. We achieved enhancement of T-peel strength between the PTFE substrate/ epoxy resin/ SUS substrate of 9.3 N/mm, which exceeds the T-peel strength obtained from conventionally used sodium-naphthalene processing (9.1 N/mm).
技術論文
  • 谷口 義尚, 金 永鍾, 萩生 真知子, 田口 好弘, 杉村 博之
    2014 年 65 巻 5 号 p. 234-239
    発行日: 2014/05/01
    公開日: 2015/05/01
    ジャーナル フリー
    For application to synthetic resin parts and to the fabrication of microfluidic devices made of cyclo-olefin polymer (COP), an adhesiveless bonding technology was developed: photo-activation bonding. A Xe excimer lamp irradiating vacuum ultraviolet (VUV) light of 172 nm wavelength was used as a light source for COP surface modification. The surface modification procedure is extremely simple. A COP plate placed in air with atmospheric pressure is irradiated with the VUV light. Based on VUV photochemistry assisted with atmospheric oxygen, a modified layer including large amounts of polar functional groups (-OH, -CHO, -COOH, etc.) is formed on the COP plate. The VUV-modified COP plates were bonded at a low temperature through attractive interactions between the modified layers on the COP plates without deforming the plates' preformed microstructures. A strength test of bonding was conducted to elucidate the effects of surface modification and bonding conditions such as VUV-irradiation distance (dVUV), VUV-irradiation time (tVUV), bonding pressure (PB), bonding temperature (TB), and bonding time (tB).
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