3D打印连续纤维增强聚碳酸酯复合材料预浸丝制备与性能  

Preparation and properties of 3D printing continuous fiber reinforced polycarbonate composite prepreg filaments

作　　者：杨来侠[1] 刘波 刘腾飞 高扬 田小永[2] YANG Laixia;LIU Bo;LIU Tengfei;GAO Yang;TIAN Xiaoyong(School of Mechanical Engineering,Xi'an University of Science and Technology,Xi'an 710054,China;State Key Laboratory of Mechanical Manufacturing System Engineering,Xi'an Jiaotong University,Xi'an 710049,China)

机构地区：[1]西安科技大学机械工程学院,西安710054 [2]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《复合材料学报》2023年第10期5654-5665,共12页Acta Materiae Compositae Sinica

基　　金：基础加强项目(2017-JCJQ-ZD-035);国家自然科学基金(52205413);中国博士后科学基金(2022M712534)。

摘　　要：为降低3D打印连续纤维增强聚合物(CFRP)复合材料的孔隙率,提高树脂对纤维的浸渍程度,需要开展熔融浸渍连续纤维预浸丝制备与3D打印性能研究,开发纤维预浸渍一体化设备。本文以玻璃纤维(GF)、碳纤维(CF)作为增强体,聚碳酸酯(PC)为基体,开发熔融浸渍预浸丝制备工艺,研究浸渍工艺对预浸丝性能的影响。以预浸丝为原料,研究3D打印成形工艺参数对纤维含量、孔隙率及力学性能的影响规律。结果表明:连续玻璃纤维增强聚碳酸酯(CGF/PC)预浸丝的拉伸强度为627.8 MPa,当打印温度为260℃,分层厚度为0.10 mm,扫描间距为1.0 mm时,连续碳纤维增强聚碳酸酯(CCF/PC)复合材料纤维含量为28.66vol%,拉伸强度和模量分别644.8 MPa和85.6 GPa,优化后孔隙率为3.87%。当打印温度为280℃,分层厚度为0.14 mm,扫描间距为1.2 mm时,CGF/PC复合材料纤维含量为51.35vol%,拉伸强度和模量分别为381.4 MPa和23.6 GPa,优化后孔隙率为4.41%。To reduce the porosity of 3D printing continuous fiber reinforced polymer(CFRP)composites and improve the degree of resin impregnation on fibers,it is of great necessity to conduct research on the preparation and 3D printing performance of melt-impregnated continuous fiber prepreg filaments,as well as develop integrated fiber prepreg equipment.With glass fiber(GF)and carbon fiber(CF)as reinforcement,and polycarbonate(PC)as matrix,this study aims to develop a melt-impregnated prepreg wire preparation process and study the influence of the impregnation process on prepreg wire properties.Besides,using prepreg yarn as the raw material,this study is aimed at studying the effect of 3D printing forming process parameters on the fiber content,porosity and mechanical properties as well.The results indicate that when the tensile strength of continuous glass fiber reinforced polycarbonate(CGF/PC)prepreg filament is 627.8 MPa,the printing temperature is 260℃,the layering thickness is 0.10 mm,the scan spacing is 1.0 mm,the fiber content of continuous carbon fiber reinforced polycarbonate(CCF/PC)composite is 28.66vol%,the tensile strength and modulus are respectively 644.8 MPa and 85.6 GPa,and the optimized porosity is 3.87%.When the printing temperature is 280℃,the layering thickness is 0.14 mm,and the scan spacing is 1.2 mm,the fiber content of continuous glass fiber reinforced polycarbonate(CGF/PC)composite turn out to be 51.35vol%,the tensile strength and modulus are respectively 381.4 MPa and 23.6 GPa,and the optimized porosity is 4.41%.

关 键 词：连续纤维 聚碳酸酯 孔隙率 预浸丝 力学性能 3D打印 

分 类 号：TB332[一般工业技术—材料科学与工程]