Polyetherketoneketone/carbon fiber composites with an amorphous interface prepared by solution impregnation  

炭纤维/聚醚酮酮湿法复合诱导非晶态粘附以增强界面剪切强度

作　　者：ZHANG Feng LI Bo-lan JIAO Meng-xiao LI Yan-bo WANG Xin YANG Yu YANG Yu-qiu ZHANG Xiao-hua 张凤;李博澜;焦梦晓;李言博;王昕;杨禹;阳玉球;张骁骅(东华大学纺织面料技术教育部重点实验室,纺织学院,纺织科技创新中心,上海201620;中国科学院山西煤炭化学研究所,中国科学院炭材料重点实验室,山西太原030001)

机构地区：[1]MOE Key Laboratory of Textile Science&Technology,College of Textiles,Innovation Center for Textile Science and Technology,Donghua University,Shanghai 201620,China [2]Key Laboratory of Carbon Materials,National Engineering Laboratory for Carbon Fiber Technology,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China

出　　处：《新型炭材料（中英文）》2024年第4期692-702,共11页New Carbon Materials

基　　金：中央高校基本科研业务费专项资金(2232021G-01);国家自然科学基金(62176158).

摘　　要：Interfacial adhesion between carbon fibers(CF)and polyetherketoneketone(PEKK)is a key factor that affects the mechanical performances of their composites.It is therefore of great importance to impregnate the CF bundles with PEKK as effi-ciently as possible.We report that PEKK with a good dispersion in a mixed solution of 4-chlorophenol and 1,2-dichloroethane can be introduced onto CF surfaces by solution impregnation and curing at 280,320,340 and 360℃.The excellent wettability or infiltra-tion of the PEKK solution guarantees a full covering and its tight binding to CFs,making it possible to evaluate the interfacial shear strength(IFSS)with the microdroplet method.The interior of the CF bundles is completely and uniformly filled with PEKK by solu-tion impregnation,leading to a high interlaminar shear strength(ILSS).The maximum IFSS and ILSS reached 107.8 and 99.3 MPa,respectively.Such superior shear properties are ascribed to the formation of amorphous PEKK in the small spaces between CFs.炭纤维与聚醚酮酮之间的界面粘接是影响其复合材料力学性能的关键因素,因此如何高效地将聚醚酮酮浸透到炭纤维束中尤为关键。本工作基于聚醚酮酮的高溶解性,采用湿法加工策略将其引入到炭纤维表面。聚醚酮酮优异的润湿性保证其在炭纤维表面完全覆盖并紧密结合,使微液滴法评估界面剪切强度成为可能。通过溶液浸渍,聚醚酮酮可以完全均匀地填充炭纤维束内部,从而获得较高的层间剪切强度。研究表明炭纤维与聚醚酮酮的最大界面剪切强度和层间剪切强度分别达到107.8和99.3 MPa。这种优异的力学性能归因于理想复合所带来的限域效应使得聚醚酮酮在炭纤维间形成了非晶态结构,从而显著提高了粘附作用。

关 键 词：Polyetherketoneketone Carbon fiber WETTABILITY Amorphous adhesion Interfacial strength 

分 类 号：TB33[一般工业技术—材料科学与工程]