现代纺织技术2025，Vol.33Issue(6)：9-16,8.DOI:10.19398/j.att.202404012
超高分子量聚乙烯纤维的表面聚乙烯醇氧化自交联亲水改性
Self-crosslinking hydrophilic modification of ultra-high molecular weight polyethylene fiber surface with polyvinyl alcohol oxidation
摘要
Abstract
The ultra-high molecular weight polyethylene(UHMWPE)fiber,as a high-performance fiber with high strength and high modulus,has found applications in numerous industrial fields due to its exceptional physical and chemical properties,such as ultra-high strength,good impact resistance,chemical corrosion resistance,and lightweight characteristics.These properties make it suitable for use in aerospace(processing of shell outer layers),national defense and military(stab-resistant materials),marine engineering(cables and ropes),biomedical applications,labor protection(cables),sporting goods and equipment,and many other industrial production areas. Despite its numerous excellent physicochemical properties,the UHMWPE fiber still exhibits drawbacks such as easy creep,poor heat resistance,and no oxidation resistance.Furthermore,due to its high degree of orientation,high crystallinity and extremely low surface molecular polarity,the UHMWPE fiber has a very smooth surface and extremely low surface energy.This makes it difficult to process the UHMWPE fiber further,with challenges mainly manifesting in low interfacial bonding strength with resin matrices,poor fiber-to-fiber bonding,and poor dyeing performance.Therefore,the modification of the fiber,especially the modification of fiber interface,is of great significance to the expansion of its application range. At present,the main modification methods can be roughly divided into wet modification and dry modification.Dry modification mainly includes corona discharge treatment,plasma surface treatment,etc.Wet modification primarily encompasses chemical etching,surface grafting,surface coating and so on.In view of the inert surface of UHMWPE fibers and the difficulty of subsequent composite,the article leveraged the ability of persulfates to initiate self-crosslinking of polyvinyl alcohol(PVA).A thermally activated persulfate system was employed to deposit PVA onto the surface of UHMWPE fibers after self-crosslinking,thereby improving their surface hydrophilicity.The effects of factors such as the degree of polymerization of PVA,persulfate concentration,reaction time,and reaction temperature were investigated,and the fibers after deposition were subjected to ultrasonic water washing for different durations to test their firmness.The modified fibers were characterized by X-ray photoelectron spectroscopy,Fourier transform infrared spectroscopy,and scanning electron microscopy.The results indicate that thermally activated potassium persulfate generates hydroxyl radicals and sulfate radicals,which can catalyze the self-crosslinking of PVA and its deposition onto the surface of UHMWPE fibers.For improving hydrophilicity,using PVA with a degree of polymerization of 1,700,adding 1 mL of 0.1 mg/mL potassium persulfate,and reacting at 80 ℃ for 90 minutes can achieve complete infiltration.Moreover,the coating can remain stable after 2 hours of ultrasonic washing.关键词
超高分子量聚乙烯纤维/亲水性/自由基交联/聚乙烯醇/表面改性Key words
UHMWPE fiber/hydrophilicity/radical crosslinking/polyvinyl alcohol/surface modification分类
化学工程引用本文复制引用
汪超,竺哲欣,王刚强,吕汪洋..超高分子量聚乙烯纤维的表面聚乙烯醇氧化自交联亲水改性[J].现代纺织技术,2025,33(6):9-16,8.基金项目
浙江省科技计划项目(2022C01226) （2022C01226）
