反气相色谱法测定聚醚醚酮的表面性质及在提升热塑性复合材料层间性能中的应用  

Surface characterization of polyether-ether-ketone by inverse gas chromatography and the application in the improvement of thermoplastic composites interlaminar performance

作　　者：高亮 贾伟 石峰晖 霍红宇 周典瑞 刘焕君 张宝艳 GAO Liang;JIA Wei;SHI Fenghui;HUO Hongyu;ZHOU Dianrui;LIU Huanjun;ZHANG Baoyan(AVIC Manufacturing Technology Institute Composite Technology Center,Beijing 101300,China;AVIC Composites CO.,LTD.,Beijing 101300,China)

机构地区：[1]中国航空制造技术研究院复合材料技术中心,北京101300 [2]中航复合材料有限责任公司检测技术中心,北京101300

出　　处：《复合材料学报》2023年第5期2587-2597,共11页Acta Materiae Compositae Sinica

摘　　要：高性能热塑性聚醚醚酮树脂基复合材料具有高韧性、耐疲劳、原材料可长期贮存、成型速度快、可重复加工和回收再利用等独特优势,在航空航天等工业领域应用广泛。粉末悬浮法通过将聚醚醚酮细粉配制成水基悬浮液实现对纤维充分浸渍,现已成为制备连续纤维增强热塑性预浸料的重要方式。本文重点开展反气相色谱法研究聚醚醚酮表面性质,并结合微观形貌、粒径分布等方面对比国内外聚醚醚酮树脂的差异。研究表明:进口聚醚醚酮树脂色散表面能(19.2 mJ/m^(2))明显低于同级别国产树脂(41.1 mJ/m^(2));极性探针分子吸附于聚醚醚酮表面的驱动力主要是酸碱作用力,表面总体表现为碱性。进口聚醚醚酮树脂相比于国产具有更高的极性,使其更容易分散在水中;而国产聚醚醚酮树脂微观形貌、表面性质则更加均匀。表面性质研究指导水基悬浮液配制,制备的连续纤维增强热塑性预浸料质量优异,孔隙率低于0.5%且纤维排布整齐,热塑性复合材料层压板层间剪切强度平均值达109 MPa,与传统热熔浸渍方法相比提升30%以上。High performance polyether-ether-ketone(PEEK)thermoplastic composites have the advantages of good impact and fatigue resistance,unlimited ambient temperature storage life,short molding cycles,being recyclable and good reprocessing ability,which have been widely used in aerospace and other industry domains.Powder impregnation method can realize the infiltration of resin particles into fibers by water-based suspension,which has become an effective technical route for preparing continuous fiber reinforced thermoplastic prepregs.This paper focused on the surface characterization of PEEK produced in both domestic and overseas by inverse gas chromatography(IGC)as well as the comparison of microstructure and size distribution.The results show that the dispersion surface energy value of imported PEEK(19.2 mJ/m^(2))is obviously lower than the domestics(41.1 mJ/m^(2)).The driving force of the adsorption between PEEK particles and polar probe molecules is acid-base interaction in nature,while the surface of PEEK particles is generally alkaline.With higher surface polarity,imported PEEK can more easily disperse into water through the dispersant.By preparing the water-based resin slurry based on the sur face characterization results,the thermoplastic prepregs produced with powder impregnation method show excellent quality.The porosity of the powder impregnation prepregs is less than 0.5%and fibers are neatly arranged,with the short beam shear strength of 109 MPa,30%higher comparing with prepregs produced by traditional hot melt impregnation method.

关 键 词：热塑性复合材料 反气相色谱法 聚醚醚酮 粉末浸渍法 层间性能 

分 类 号：TB332[一般工业技术—材料科学与工程]