▎ 摘　　要

NOVELTY - Improving binding between ultra-high molecular weight polyethylene fiber and matrix resin by surface modification method comprises e.g. (i) soaking ultra-high molecular weight polyethylene fiber in ethanol for ultrasonically cleaning and drying, (ii) performing plasma treatment on fiber, (iii) soaking fiber in ethanol/water mixed solution containing silane coupling agent for carrying out reaction, and performing dehydration condensation reaction, (iv) ultrasonically dispersing large-sized inorganic nanoparticles in mixed solution of water and absolute ethanol, and dropping dispersion to ethanol/water mixed solution containing silane coupling agent, (v) adding fiber to modified liquid of large-diameter inorganic nanoparticles, stirring, taking out and drying, and (vi) ultrasonically dispersing small-sized inorganic nanoparticles in mixed solution of water and absolute ethanol, and dropping obtained dispersion to ethanol/water mixed solution containing silane coupling agent USE - The method is useful for improving binding between ultra-high molecular weight polyethylene fiber and matrix resin by surface modification method. ADVANTAGE - The method: combines plasma technology and inorganic nano-particle doping technology to modify the surface of ultra-high molecular weight polyethylene fiber; greatly increases the roughness of the fiber surface without affecting the characteristics of the UHMWPE fiber itself; and improves interfacial bonding strength of the fiber when used in combination with other resin matrices. DETAILED DESCRIPTION - Improving binding between ultra-high molecular weight polyethylene fiber and matrix resin by surface modification method comprises (i) soaking the ultra-high molecular weight polyethylene fiber in ethanol for ultrasonically cleaning and drying, (ii) performing plasma treatment on fiber obtained in step (i) at 10-200 W under 15-30 Pa with gas flux of 0.5-5 l/minute for 0.5-5 minutes, (iii) soaking fiber obtained in step (ii) in ethanol/water mixed solution containing a silane coupling agent for carrying out reaction for 1-5 hours, and performing dehydration condensation reaction at 90-130degrees Celsius for 0.5-3 hours, (iv) ultrasonically dispersing large-sized inorganic nanoparticles in mixed solution of water and absolute ethanol, and dropping obtained dispersion to ethanol/water mixed solution containing silane coupling agent for modifying to obtain modified liquid of large-diameter inorganic nanoparticles, (v) adding fiber obtained in step (iii) to modified liquid of large-diameter inorganic nanoparticles obtained in step (iv) and stirring for carrying out reaction, taking out and drying, (vi) ultrasonically dispersing small-sized inorganic nanoparticles in mixed solution of water and absolute ethanol, and dropping obtained dispersion to ethanol/water mixed solution containing silane coupling agent for modifying treatment to obtain modified liquid of small-sized inorganic nanoparticles is obtained, and (vii) adding fiber obtained in step (iv) to modified liquid of small particle size inorganic nanoparticles obtained in step (vi), stirring and carrying out reaction, taking out and drying to obtain surface-modified ultra-high molecular weight polyethylene fiber.