改善超高分子量聚乙烯纤维粘合性能的研究

本文旨在分析、探讨超高分子量聚乙烯纤维表面处理的各种方法，如等离子体法、化学试剂氧化法等。通过其表面处理，纤维表面或粗糙度有了提高或携带了极性基团，从而使超高分子量聚乙烯纤维与基体粘合性能得以改善。尤为关注近几年来对超高分子量聚乙烯纤维的改性新动态.     

超高分子量聚乙烯纤维的性能与应用

超高分子量聚乙烯纤维是世界三大高性能纤维之一,因为它的化学性能和物理机械性能极具优势,在很多领域广泛使用,比如:军事上、工业上、航海上、航空航天上等。同时超高分子量聚乙烯纤维是我国要重点发展的高科技项目,也是我国极力发展的特种纤维之一。本文综合阐述了什么是超高分子量聚乙烯纤维,超高分子量聚乙烯纤维的发展历程、性能和应用,并且对它的发展前景进行了预估。     

一种特高强超高分子量聚乙烯纤维的制备方法

正本发明提供一种特高强超高分子量聚乙烯纤维的制备方法,采用线性低密度聚乙烯与超高分子量聚乙烯和溶剂共混制备超高分子量聚乙烯纤维,并通超倍拉伸形成高强纤维。将500万～1 000万超高分子量聚乙烯的低溶度溶胀混合物与线性低密度聚乙烯按比例在纺丝溶剂中混合,通过提高超高分子量聚乙烯的分子链长度和添加线性低密度聚乙烯降低纺丝液的黏度,降低螺杆的温度减     

我国超高分子量聚乙烯行业发展现状及前景

超高分子量聚乙烯纤维是第三代高性能纤维。本文从市场、生产和加工工艺技术角度对我国超高分子量聚乙烯行业发展现状进行了分析,并对我国"十二五"期间超高分子量聚乙烯行业的发展前景进行预测。     

专利文摘

正一种改性超高分子量聚乙烯纤维混纺制备方法本发明公开了一种改性超高分子量聚乙烯纤维混纺制备方法。其制备步骤为:步骤一,改性超高分子量聚乙烯的制备;A.先将超高分子量聚乙烯研磨成粉加入到反应釜中,然后向反应釜中加入十氢萘溶剂并对其进行加热溶解,制得超高分子量聚乙烯溶液;B.然后向反应釜中加入PTFE乳液、硅烷偶联剂、石墨和助剂,制得改性超高分     

超高分子量聚乙烯纤维缆绳替代传统浮标锚链的初探

超高分子量聚乙烯纤维是一种新型高性能纤维,由其制作成的缆绳耐磨损、抗冲击、抗耐腐蚀、不易被海洋生物附着。本文将某品牌超高分子量聚乙烯纤维缆绳与传统锚链进行对比,得出其优势,论证超高分子量聚乙烯纤维缆绳在代替传统浮标锚链的可行性,指出了存在的问题,并提出了对未来的展望。     

超高分子量聚乙烯纤维/有机玻璃复合材料摩擦磨损性能研究

用真空浸渍法成功制备出了超高分子量聚乙烯纤维／有机玻璃(UHMWPE／PMMA)复合材料，并对基体材料PMMA，单向超高分子量聚乙烯纤雏／有机玻璃复合材料以及三维编织超高分子量聚乙烯纤维／有机玻璃(即UHMWPE3D／PMMA)复合材料的摩擦磨损性能进行了研究。实验证明UHMWPE／PMMA复合材料具有优良的摩擦磨损性能。经过纤维增强的复合材料的摩擦磨损性能优于基体材料，三维编织纤维增强的复合材料其磨损远小于单向纤维增强的复合材料，但其摩擦系数没有显著变化。     

超高分子量聚乙烯纤维表面浸润性的研究

用低温等离子、液态氧化、电晕、紫外接枝、等离子接枝等方法对超高分子量聚乙烯纤维进行了表面处理，并用电子天平法对该纤维对乙二醇的浸润性作了研究。经表面处理后，超高分子量聚乙烯纤维对乙二醇的浸润性提高，接触角减小。对影响浸润性的各因素也作了探讨。     

超高分子量聚乙烯纤维产业现状与市场前景

介绍超高分子量聚乙烯纤维的物化性能、制造工艺、产业现状、应用领域、市场前景等方面的一些情况,并对今后国内超高分子量聚乙烯纤维产业的发展提出了建议.     

细旦高强聚乙烯纤维加工过程研究

通过对不同生产厂家的超高分子量聚乙烯(UHMWPE)树脂的黏均分子量、结晶度、溶胀后料液的流变特性等物化性质进行对比和分析,采用凝胶纺丝-超高倍拉伸技术对UHMWPE树脂进行纺丝,制备了细旦高强超高分子量聚乙烯纤维,对纤维的结晶度、纤度及力学特性进行了测试分析。结果表明,UHMWPE树脂的结晶度、颗粒大小等物理特性对制备的成品纤维的性能有较大的影响,树脂的黏均分子量与其结晶度不成正相关,而与其制备的成品聚乙烯纤维的结晶度成正相关,且结晶度越高制备的纤维性能更优异;黏均分子量大、原料液较优的流变特性均有利于双螺杆的加工,其成品纤维的强度、模量均较高,黏均分子量大、粒径分布窄,更有利于制备细旦高强超高分子量聚乙烯纤维,同时,超倍机械热牵伸是目前提高超高分子量聚乙烯纤维力学性能较有效的方法。     

UHMWPE纤维的表面改性及其在网式阻车器中的应用

本文简要介绍了超高分子量聚乙烯(UHMWPE)纤维的性能,总结了超高分子量聚乙烯纤维等离子处理法、氧化处理法、电晕放电处理法、辐射引发表面接枝处理等多种表面处理方法,讨论了这些表面处理方法对纤维增强复合材料粘结性能和本体力学性能的影响,分析了这些方法的处理效果、处理工艺等对实现连续化、工业化可行性的影响,并介绍了由UHMWPE纤维为原料制成的特种纤维网片在网式阻车器这个反恐领域的特殊应用。     

Chemical modification combined with corona treatment of UHMWPE fibers and their adhesion to vinylester resin

The influence of corona treatment on the near-surface structures of treated ultra-high-molecular-weight polyethylene (UHMWPE) fibers was studied first by atomic force microscopy (AFM). AFM pictures showed that the pits on the corona-treated PE fiber surfaces had different change characteristics in depth compared with in length and breadth with variations of corona power. Then the UHMWPE fibers were subjected to chemical modification following the corona treatment, named the two-stage treatment. Surface morphologies and chemical properties of the treated fibers were analyzed by scanning electron microscopy (SEM), FT-IR–ATR spectroscopy and Raman spectroscopy. The results obtained suggested that some carbon–carbon double bonds had been introduced on the surfaces of the PE fibers after the two-stage treatment. These unsaturated groups could participate in free-radical curing of vinylester resin (VER), and this resulted in improvement of interfacial adhesion strength in the PE fiber/VER composites. In addition, the mechanical properties of the UHMWPE fibers reduced after corona treatment did not reduce further after subsequent chemical treatment with increase of corona power. In short, the two-stage treatment proved to be effective in improving the interfacial adhesion of the composites and maintaining the high mechanical properties of the PE fibers, as this treatment method did not destroy the bulk structure of the UHMWPE fibers.     

超高分子量聚乙烯纤维的硅烷交联改性

在过氧化物引发下,采用硅烷(KH-570)对超高分子量聚乙烯(UHMWPE)纤维进行接技交联改性。考察了引发剂种类、引发剂用量、硅烷用量对纤维接枝率、力学性能及蠕变性的影响。经过加热(110℃)12h测定纤维的力学性能。结果表明:经硅烷处理,纤维受热后力学性能和纤维的蠕变性能有了很大提高。     

超高分子量聚乙烯纤维表面处理的研究进展

详细介绍了超高分子量聚乙烯纤维的各种表面处理方法 ,如等离子体处理、电晕放电和化学氧化等 ,重点讨论了这些方法对纤维增强复合材料粘结性能和力学性能的影响 ,特别关注了近年来各种表面处理超高分子量聚乙烯纤维技术的进展。     

Mechanical properties of surface‐modified ultra‐high molecular weight polyethylene fiber reinforced natural rubber composites

The mechanical properties of ultra‐high molecular weight polyethylene (UHMWPE) fibers reinforced natural rubber (NR) composites were determined, and the effects of fiber surface treatment and fiber mass fraction on the mechanical properties of the composites were investigated. Chromic acid was used to modify the UHMWPE fibers, and the results showed that the surface roughness and the oxygen‐containing groups on the surface of the fibers could be effectively increased. The NR matrix composites were prepared with as‐received and chromic acid treated UHMWPE fibers added 0–6 wt%. The treated UHMWPE fibers increased the elongation at break, tear strength, and hardness of the NR composites, especially the tensile stress at a given elongation, but reduced the tensile strength. The elongation at break increased markedly with increasing fiber mass fraction, attained maximum values at 3.0 wt%, and then decreased. The tear strength and hardness exhibited continuous increase with increasing the fiber content. Several microfibrillations between the fiber and NR matrix were observed from SEM images of the fractured surfaces of the treated UHMWPE fibers/NR composites, which meant that the interfacial adhesion strength was improved. POLYM. COMPOS., 38:1215–1220, 2017. © 2015 Society of Plastics Engineers     

低温等离子体技术在超高相对分子质量聚乙烯纤维表面改性中的应用

介绍了低温等离子体的概念、分类及其在超高相对分子质量聚乙烯纤维(UHMWP E)表面改性方面的特点;阐述了国内外在低温等离子体对UHMWPE纤维表面改性前后纤维本身及其复合材料性能的影响情况;简介了用自行研制的低温等离子体设备对UHMWPE纤维进行表面改性的研究结果和低温等离子体处理UHMWPE纤维表面改性的发展前景。实验表明,UHMWPE纤维经过等离子体处理后表面产生刻蚀和交联,其与树脂间的粘结性能改善;该低温等离子体设备能满足UHMWPE纤维表面改性连续化生产需要。     

Enhanced wear resistance of ultra-high molecular weight polyethylene fibers by modified-graphite oxide

A simple and feasible method to enhance the wear resistance of ultra-high molecular weight polyethylene (UHMWPE) fibers was reported. The graphite oxide (GO) prepared using improved Hummer's method was surface modified with hexadecylamine to improve its compatibility with UHMWPE. Combined with well-dispersion of modified-GO (m-GO) in dichloromethane and the fact that the viscosity of UHMWPE suspension can be decreased by dichloromethane, the well dispersed m-GO/dichloromethane was added into UHMWPE suspension to improve m-GO dispersion in UHMWPE fibers. Finally, UHMWPE fibers with different m-GO concentration were prepared using gel spinning technology. The effect of m-GO concentration on the structure and properties of modified UHMWPE fibers were investigated. The results indicated that the melting temperature and crystallinity of m-GO modified UHMWPE fibers increased with increasing of m-GO concentration, while the fiber's crystal sizes and orientation increased, thus the tensile strength of m-GO modified UHMWPE fibers remained almost undamaged. The introduction of m-GO is beneficial to the formation of smooth transfer film on fiber's surface, which enhanced the self-lubrication of UHMWPE fibers. Compared with pure UHMWPE fiber, the UHMWPE fiber containing 1.5 wt% m-GO had enhanced wear resistance by 55.4% and still maintained high tensile strength of 29.98 cN dtex⁻¹.     

UHMWPE纤维高强度绳索的研究

研究了纤维捻度、粘结剂对超高分子量聚乙烯(UHMWPE)纤维力学性能的影响及浸胶UHMWPE纤维表面的耐磨性能。UHMWPE纤维的断裂强力随着纤维捻度的增加而下降；纤维表面浸胶处理后断裂强力提高，当UH—MWPE纤维中改性氯丁胶或聚氨酯粘结剂的合量为6％时，其断裂强力增加17．2％或13．9％。经聚氨酯粘结剂处理的UHMWPE纤维表面的耐磨性能最好。     

Utilization of supercritical CO2 as a processing aid for preparation of ultrahigh molecular weight polyethylene/functionalized activated nanocarbon fibers

This is the first investigation to report the processing and properties of ultrahigh molecular weight polyethylene (UHMWPE)/functionalized activated nanocarbon (FANC) gel solutions with the aid of supercritical carbon dioxide (scCO₂). The ultradrawing and ultimate tensile properties of scCO₂UHMWPE and scCO₂UHMWPE/FANC fibers were found to improve considerably compared to those of UHMWPE and UHMWPE/FANC fibers prepared in the conventional way. The maximum achievable draw ratio obtained for the optimal scCO₂UHMWPE/FANC fibers drawn at 95°C reached 445. The highest tensile tenacity (σ_f) of the fully drawn scCO₂UHMWPE/FANC fiber reached an extraordinary high value of 104 g/d, which is about 3.2 and 1.1 times of that of the optimal UHMWPE and UHMWPE/FANC fully drawn fibers, respectively. The σ_f obtained for the optimally fully drawn scCO₂UHMWPE/FANC fiber is about 25 times of those of steel fibers and is the highest tensile tenacity ever reported for single‐stage drawn polymeric fibers. Considerably lower dynamic transition temperatures and evaluated thinner crystal lamellae nucleated off of extended chains or FANC nucleants were found for as‐prepared scCO₂UHMWPE and scCO₂UHMWPE/FANC fibers compared with UHMWPE and UHMWPE/FANC fibers, respectively. Specific surface area, morphological, and Fourier transform infrared analyses of the activated nanocarbon (ANC), acid‐treated activated nanocarbon (ATANC) and FANC nanofillers and investigation of thermal, morphological, and orientation factor properties of the as‐prepared and drawn UHMWPE, UHMWPE/FANC, scCO₂UHMWPE, and scCO₂UHMWPE/FANC fibers were performed to understand the remarkable ultradrawing, dynamic transition, and ultimate tensile properties obtained for scCO₂UHMWPE and scCO₂UHMWPE/FANC fibers. POLYM. ENG. SCI., 59:1462–1471 2019. © 2019 Society of Plastics Engineers     

Effects of stearic acid on the tensile properties of ultrahigh molecular weight polyethylene fibers

For the purpose of the development of ultrahigh molecular weight polyethylene (UHMWPE) fibers with improved tensile properties, the stearic acid (SA) was added to the gel spinning of UHMWPE and acted as a lubricant film. SA addition was intended to be 0.2, 0.4, 0.6, 0.8, and 1.0 wt% of UHMWPE for forming the SA modified UHMWPE fibers. The tensile properties, thermal properties, crystallization properties, and orientation properties of the prepared UHMWPE fibers were systematically investigated. Results show that there is a more significant tensile property for UHMWPE fibers as SA addition is 0.6 wt%. Their tensile strength and tensile modulus reach 32.86 and 1580.89 cN/dtex, which are raised to an extent of 12.0% and 7.7%, respectively, compared with UHMWPE fibers alone. Moreover, the thermal properties, crystallization properties, and orientation properties of the prepared UHMWPE fibers are enhanced observably when the SA addition is 0.6 wt%.