聚醚砜超细纤维无纺布层间增韧碳纤维/环氧树脂复合材料制备与表征  

Preparation and properties of carbon fiber reinforced epoxy resin composites interlaminate-toughened by polyethersulfone ultrafine-fiber non-woven fabric

作　　者：张代军 包建文 钟翔屿 王德辉 张天骄[5] 陈祥宝 ZHANG Daijun;BAO Jianwen;ZHONG Xiangyu;WANG Dehui;ZHANG Tianjiao;CHEN Xiangbao(AECC Beijing Institute of Aeronautical Materials,Beijing 100095,China;National Key Laboratory of Advanced Composites,Beijing 100095,China;AVIC Composite Center,Beijing 101300,China;AVIC Composite Corporation Ltd.,Beijing 101300,China;Beijing Institute of Fashion Technology,School of Material Science and Technology,Beijing 100029,China)

机构地区：[1]中国航发北京航空材料研究院,北京100095 [2]先进复合材料国防科技重点实验室,北京100095 [3]航空工业复合材料技术中心,北京101300 [4]中航复合材料有限责任公司,北京101300 [5]北京服装学院材料科学与工程学院,北京100029

出　　处：《复合材料学报》2022年第8期3767-3775,共9页Acta Materiae Compositae Sinica

摘　　要：为提高环氧树脂基复合材料的冲击后压缩强度,采用更适用于批量化制备的聚醚砜-尼龙6(PESPA6)共混纺丝溶解剥离法制备PES超细纤维无纺布,并将该无纺布用于碳纤维增强环氧树脂基复合材料的层间增韧,通过测试复合材料增韧前后的I型层间断裂韧性(GIC)、II型层间断裂韧性(GIIC)和冲击后压缩强度(CAI),并表征复合材料层间断裂微观形貌,研究该无纺布对复合材料层间韧性的影响与复合材料超细纤维无纺布层间增韧机制。结果表明,采用无纺布层间增韧环氧树脂复合材料后,其GIC性能由增韧前的289 J/m^(2)提升到增韧后的312 J/m^(2);GIIC性能由增韧前的1391 J/m^(2)提升到增韧后的3649 J/m^(2)。试样冲击后损伤面积由增韧前的1050 mm^(2)降低到增韧后的204 mm^(2),相应的冲击后压缩强度由增韧前的228 MPa提升到增韧后307 MPa。To improve the compression strength after impact of epoxy-based composites,polyethersulfone(PES)ultrafine-fiber non-woven fabric was fabricated from polyethersulfone-Nylon 6(PES-PA6)blended fibers using solution-stripping method,which is more suitable for batch preparation.Then the obtained non-woven fabric was applied in the interlaminar toughing of carbon fiber reinforced epoxy resin-based composites.Interlaminar fracture toughness under mode I(GIC),interlaminar fracture toughness under mode II(GIIC),compressive strength after impact(CAI)and interlaminar fracture micro-morphology of composites were tested to research the influence of the non-woven fabric on the interlaminar toughness of composites and the corresponding mechanism of interlaminar toughing.The result indicates that after epoxy resin-based composites are interlaminate-toughened with the non-woven fabric,the GIC value is raised to 312 J/m^(2) from 289 J/m^(2) and GIIC value is improved to 3649 J/m^(2) from 1391 J/m^(2).Also,the post-impact damage area of tested specimens is reduced from 1050 mm^(2) to 204 mm^(2) after toughing treatment,and the corresponding post-impact compressive strength is increased from 228 MPa to 307 MPa.

关 键 词：环氧树脂 复合材料 碳纤维 层间增韧 共混纺丝 

分 类 号：TB332[一般工业技术—材料科学与工程]