聚醚醚酮摩擦学性能改性及其应用研究进展

本文综述了聚醚醚酮(Polyetheretherketone,PEEK)的特性及其应用,重点探讨了PEEK复合改性中的无机填料填充、纤维增强、聚合物共混及表面改性四个方面对PEEK复合材料性能的影响,简述了PEEK复合材料在航空航天领域、汽车工业及涂料工业中的应用研究进展,并指出PEEK改性过程中纳米材料的团聚以及无机有机物的相容性仍是目前亟待解决的重要问题,寻求更多的增强体和简便复合工艺以实现材料更优性价比是今后的研究重点。     

PEEK复合材料用碳纤维上浆剂研究进展EI北大核心CSCD

热塑性聚醚醚酮(PEEK)复合材料具有优异的断裂韧性、抗冲击性能、耐疲劳性能,广泛应用于航空航天领域。上浆剂作为碳纤维的核心配套产品,对复合材料界面有重要影响。受分解温度限制,传统热固性碳纤维上浆剂难以满足PEEK复合材料使用,制约高性能PEEK复合材料的研制和应用,因此研制匹配PEEK复合材料的碳纤维上浆剂具有重要意义。本文分析了PEEK复合材料界面特性及上浆剂作用机理;重点介绍了改性PEEK、聚酰亚胺前驱体、聚醚酰亚胺等类型上浆剂的研究进展和成果,并对不同体系上浆剂进行分析总结;最后对PEEK复合材料用碳纤维上浆剂的研制提出建议,对上浆剂绿色环保多功能化趋势进行了展望。     

PEEK及其复合材料的研究与应用

介绍了聚醚醚酮(PEEK)的物理性能及PEEK的改性技术，并对PEEK及其复合材料在机械、航天、电子等领域的应用作了展望。     

聚苯胺复合材料的研究进展及其应用

复合改性技术能够有力的优化聚苯胺的性能,提高聚苯胺材料实际应用的价值.综述了聚苯胺/无机复合材料、聚苯胺/聚合物复合材料的研究进展,针对聚苯胺复合材料在金属防腐、传感器、电磁屏蔽等领域的应用情况进行了介绍.     

羟基磷灰石的表面改性对羟基磷灰石/聚醚醚酮复合材料力学和摩擦性能的影响

采用共沉淀法制备纳米羟基磷灰石（HA）,并用硅烷偶联剂KH560对其进行表面改性;然后,以聚醚醚酮（PEEK）为基体,通过热压成型工艺制备原始HA/PEEK与改性HA/PEEK复合材料。考察两种HA的引入对复合材料结构、力学性能和摩擦性能的影响。利用XRD、FTIR、FESEM、拉伸测试、DMA和摩擦测试对两种HA/PEEK复合材料的结构和性能进行了表征。结果表明：HA表面引入了硅烷偶联剂KH560;改性前后HA的晶型结构没有明显改变;两种HA对PEEK基体的结晶结构也没有产生影响;改性HA在PEEK基体中分散均匀;与纯PEEK相比,10wt%改性HA/PEEK复合材料的储能模量增加了55.56%,玻璃化温度增加了3.6℃,磨痕深度降低了31.1%,有效改善了复合材料的热力学性能和摩擦性能;改性HA/PEEK拉伸强度为68.33 MPa,能够满足人骨的强度要求。     

聚醚醚酮改性研究进展

聚醚醚酮(PEEK)作为一种新型高性能热塑性工程塑料,在许多工程领域有着广泛的应用.采用不同手段增强PEEK,改善其加工性能和力学性能、热性能、摩擦学性能,有利于降低材料成本和进一步拓展应用范围.本文从纤维增强PEEK、颗粒填充PEEK、PEEK表面改性、与聚合物共混等方面综述了PEEK改性研究的进展情况.     

碳纤维聚醚醚酮树脂基复合材料的制备及摩擦磨损性能研究

聚醚醚酮(PEEK)具有优良的耐热性、阻燃性和电绝缘性,广泛应用于汽车部件、半导体和热压缩级等领域。为了实现PEEK的高性能化,使之可应用于阀片、密封圈等对耐磨性有较高要求的领域,替代金属材料,通过热压法成功制得PEEK/氧化石墨烯(GO)-氧化锌(ZnO)/碳纤维(CF)(PEEK/GO-ZnO/CF)复合材料。首先将GO与ZnO通过高温反应釜在180℃反应12h,成功对石墨烯进行改性。将改性后的石墨烯与PEEK共混与CF编织布通过热压成型。通过对该复合材料的摩擦磨损性能、热稳定性、机械性能研究,加入经改性的GO含量为1.5%(wt,质量分数)条件下,制得的PEEK/GO-ZnO/CF复合材料具有较好的综合性能,在25℃条件下摩擦磨损率为13×10~(-6)mm~3/Nm,拉伸强度达到265.0MPa,弯曲强度达到262.7MPa。     

碳纤维/聚合物复合材料摩擦学改性研究进展

综述了碳纤维/聚合物复合材料摩擦学改性的研究进展情况,重点分析讨论了碳纤维表面改性、固体润滑剂共混改性、纤维混杂复合改性以及纳米粒子填充改性对碳纤维增强聚合物复合材料摩擦学性能影响的微观机制,并指出多元、多尺度功能性填料协同复合增强是改善该复合材料摩擦学性能的重要手段。     

聚醚醚酮及其改性的人工关节材料的摩擦磨损性能研究进展

聚醚醚酮(Polyetheretherketone,PEEK)优异的耐磨损性能为研发新一代高寿命人工关节提供了新希望。分别综述了采用常规摩擦学方法对纯PEEK、碳纤维增强PEEK、颗粒填充PEEK、等离子改性PEEK等作为人工关节材料,和采用模拟试验机方法对PEEK在人工髋关节、人工膝关节等假体关节面发挥耐磨损性能的应用和研究进展,最后展望了PEEK及其改性的人工关节材料摩擦磨损性能研究的发展趋势。     

碳纤维/聚醚醚酮单向带各向异性导电行为的尺度效应

具有导电各向异性的高分子复合材料(ACPCs)在场发射装置及传感器设计领域具有重要应用。常规的ACPCs很难获得超大导电各向异性系数,且力学性能有限。本文采用碳纤维(CF)宽展、表面浸润与树脂复合一体化超薄热塑性单向带制备方法,制备厚度为0.04 mm和0.1 mm的CF增强聚醚醚酮(CF/PEEK)复合材料单向带,以PEEK纤维为纬线制备CF/PEEK复合材料单向编织布,采用热成型工艺制备CF/PEEK复合材料单向层合板。利用数字万用表和霍尔效应系统测试层合板面内及厚度方向的电阻率和面内的电子迁移率;采用超景深显微镜观察CF/PEEK复合材料单向层合板面内和厚度方向的纤维排列形貌。结果表明,超薄CF/PEEK复合材料单向层合板面内(纤维方向与横向)导电率之比高达377,而面内横向和厚度方向的导电率之比接近1,表明CF/PEEK复合材料获得了良好的横观各向同性;超薄化CF/PEEK复合材料的面内电子迁移行为同样具有巨大的各向异性,这一结果为CF/PEEK复合材料在场发射器件、传感器设计及其灵敏度调控方面提供了实验基础。      

碳纤维-AlN/聚醚醚酮复合材料的制备与性能

以聚醚醚酮(PEEK)为基体树脂、碳纤维(CF)和氮化铝(AlN)为填料,通过模压成型的方法制备了抗静电耐热型CF-AlN/PEEK复合材料。采用高阻计、导热系数测定仪、热失重、差示扫描量热仪和SEM研究了CF-AlN/PEEK复合材料的抗静电性能、热性能、力学性能以及降温速率对复合材料性能的影响,并探讨了后期热处理对力学性能的影响。结果表明:当CF和AlN的质量分数均为10%时,CF-AlN/PEEK复合材料的性能较优,其表面电阻率达到108 Ω,比PEEK的表面电阻率提高了6个数量级;导热系数为0.418 W·(m·K)-1,初始分解温度高达573℃;拉伸强度提高了40.4%;降温速率越低,复合材料的熔点越高;后期热处理会影响CF-AlN/PEEK复合材料的力学性能,在270℃下热处理2 h,其拉伸强度可达146 MPa,表明在生产过程中,加工温度是影响复合材料性能的因素之一。      

The mechanical properties of insert-molded poly (ether imide) (PEI)/C fiber poly (ether ether ketone)(PEEK) composites

The mechanical properties of insert-molded poly(ether imide) (PEI)/carbon fiber poly(etheretherketone) (CF PEEK) have been examined. Bimaterial composite specimens were constructed by injecting CF PEEK into a mold containing one-half of a PEI tensile specimen. These PEI/CF PEEK composites retained much of their strength and dimensional integrity at temperatures as high as 200°C. Variations in test speed had little affect on breaking strains or stiffness. For two grades of PEI examined, properties were independent of the molecular weight of the PEI. Ultimate properties and fracture surfaces suggested good adhesion between the PEI and CF PEEK, possibly aided by miscibility between the two materials. The PEI/CF PEEK bimaterial composites behaved similarly to PC/CF PEEK specimens, but exhibited higher breaking stresses and moduli, both at room and elevated temperatures.     

Effect of carbon nanotubes on the mechanical properties and crystallization behavior of poly(ether ether ketone)

Pristine carbon nanotubes (CNTs) and noncovalently functionalized carbon nanotubes (f-CNTs) were used to prepare poly(ether ether ketone) (PEEK) composites (CNTs/PEEK and f-CNTs/PEEK) via melt blending. Noncovalently functionalized multiwalled nanotubes were synthesized using hydrogen-bonding interactions between sulfonic groups of sulfonated poly(ether ether ketone) (SPEEK) and carboxylic groups of nanotubes treated by acid (CNTs–COOH). The effects of these two kinds of nanotubes on the mechanical properties and crystallization behavior of PEEK were investigated. CNTs improved mechanical properties and promoted the crystallization rate of PEEK as a result of heterogeneous nucleation. Better enhancement of mechanical properties appeared in the f-CNTs/PEEK composites, which is ascribed to the good interaction between f-CNTs and PEEK. However, the strong interaction of f-CNTs and PEEK chains decreased the crystallization rate of PEEK for high content of f-CNTs.     

Design and preparation of graphene/poly(ether ether ketone) composites with excellent electrical conductivity

Graphene/poly(ether ether ketone) (m-TRG/PEEK) composites with excellent electrical conductivity were fabricated by hot pressing technique with thermally reduced graphene nanosheets (m-TRG) which were modified by poly(ether sulfone). Moreover, the conductive, thermal, and mechanical properties of PEEK/m-TRG composites were investigated by the precision impedance analyzer, thermal gravimetric analyzer, differential scanning calorimetry, and universal tester, respectively. The electrical conductivity of m-TRG/PEEK composites was greatly improved by incorporating graphene, resulting in a sharp transition from electrical insulator to semiconductor with a low percolation threshold of 0.76 vol.%. A high electrical conductivity of 0.18 S m^?1 was achieved with 3.84 vol.% of m-TRG. The data were compared with those of composites reduced chemically, and the results showed that thermal reduction was an effective method to acquire higher electrical conductive composites. The excellent electrical property should be attributed to the large specific surface area of m-TRG, well dispersion of m-TRG in PEEK matrix, and good compatibility of m-TRG with PEEK matrix, as proven by scanning electron microscope. Besides, m-TRG/PEEK composites also exhibited relatively good thermal and mechanical properties.     

聚醚醚酮及其复合材料摩擦学研究近况

近年来 ,国内外的摩擦学研究者对聚醚醚酮 (PEEK)及其复合材料的摩擦学行为进行了广泛的研究 ,目的是在保持 PEEK其它优越性能的基础上 ,使其减摩和抗磨性能有所提高 ,以扩展这一新型工程塑料的应用领域。本文对 PEEK及其复合材料的摩擦学研究近况进行了综述。     

聚醚醚酮增韧改性环氧树脂

采用共混法用聚醚醚酮(PEEK)改性环氧树脂(EP),借助差示扫描量热分析(DSC)确定了环氧树脂的固化工艺,测试了共混体系的工艺性能,研究了聚醚醚酮含量对环氧树脂力学性能的影响.借助扫描电子显微镜(SEM)对材料断裂面的形态结构进行了分析,探讨了体系的形态结构与冲击性能之间的关系.结果表明,在改性材料的韧性有所提高的同时,压缩强度、马丁耐热都没有降低.从断裂面的形态来看,是属于韧性断裂.当PEEK的加入量为6%时,韧性最好,达到19.1 kJ/m2,比纯的环氧树脂增加了107.6%.     

聚醚醚酮增韧改性环氧树脂

采用共混法用聚醚醚酮(PEEK)改性环氧树脂(EP),借助差示扫描量热分析(DSC)确定了环氧树脂的固化工艺,测试了共混体系的工艺性能,研究了聚醚醚酮含量对环氧树脂力学性能的影响。借助扫描电子显微镜(SEM)对材料断裂面的形态结构进行了分析,探讨了体系的形态结构与冲击性能之间的关系。结果表明,在改性材料的韧性有所提高的同时,压缩强度、马丁耐热都没有降低。从断裂面的形态来看,是属于韧性断裂。当PEEK的加入量为6%时,韧性最好,达到19．1kJ/m~2,比纯的环氧树脂增加了107．6%。     

Molecular interaction and properties of poly(ether ether ketone)/liquid crystalline polymer blends incorporated with functionalized carbon nanotubes

Multi-walled carbon nanotubes (MWCNTs) were functionalized with a carboxyl group (-COOH) to achieve better interfacial adhesions with both phases of the poly(ether ether ketone) (PEEK) and liquid crystalline polymer (LCP) in their blend. These strong interfacial interactions among the functionalized MWCNTs, PEEK and LCP improved the mechanical properties of the polymer blend. Three different weight percentages (0.6%, 1.2% and 1.8%) of acid modified CNTs were used with PEEK-LCP blend, for the preparation of nanocomposites. In PEEK-LCP blend, the ratio of PEEK and LCP was maintained as 10:6 respectively. The tensile strength and modulus of the composites were improved by 51% and 73% respectively with the incorporation of only 1.2% of MWCNT-COOH as compared to the unfilled PEEK/LCP blend. Moreover, careful studies of the molecular interaction, morphological, dynamic mechanical and thermal properties confirmed that a better miscibility between PEEK and LCP had been constituted in the presence of MWCNT-COOH. Therefore, it was found that the functionalized MWCNTs not only played the traditional role as reinforcing filler, but also performed a novel role as a compatibilizer for the PEEK/LCP blends.     

High-performance conductive materials based on the selective location of carbon black in poly(ether ether ketone)/polyimide matrix

A novel high performance conductive material with excellent comprehensive properties was prepared by melt-blending, and its performances were adjusted by controlling the selective location of carbon black (CB) in poly(ether ether ketone) (PEEK)/thermoplastic polyimide (TPI) matrix. With increasing the CB loadings, the morphology of PEEK/TPI blends changed from sea-island to co-continuous structure, which was owing to the selective location of CB in TPI phase. Notably, with the selective location of CB in the induced co-continuous PEEK/TPI matrix, the electrical percolation threshold was reduced to 5 wt%, which was significantly lower than that of binary PEEK/CB (9 wt%) and TPI/CB (10 wt%) composites. And the electrical conductivity of ternary PEEK/TPI/CB composites was 10⁴ to 10⁶ times higher than that of binary composites at identical 7.5 wt% CB loading, which was attributed to the double percolation effect. Moreover, the incorporation of CB could improve the thermal and mechanical properties effectively.