摘要
本文采用三维(3D)打印技术将碳纤维聚乳酸复合材料(CF-PLA)拉成纤维状,使CF-PLA纤维中的短切碳纤维呈现定向排列,从而增强CF-PLA纤维的力学性能。利用电子万能试验机对CF-PLA纤维的力学性能进行分析,并通过扫描电子显微镜观察CF-PLA纤维的微观表面形貌。试验结果表明,当打印头回抽速率为5 mm/s时,制备的CF-PLA纤维连续且均匀。通过控制打印头移动速率,制备不同直径(74~283μm)的CF-PLA纤维。随着打印头移动速率的增加,制备的CF-PLA纤维直径尺寸呈现逐渐减小的趋势。当CF-PLA纤维直径为135μm时,其拉伸强度(50 MPa)和杨氏模量(2331 MPa)均最大。此外,本文将CF-PLA纤维应用到层压板中,并研究了CF-PLA纤维体积分数对层压板力学性能的影响。研究发现,CF-PLA纤维体积分数为8%层压板的拉伸强度是CF-PLA纤维体积分数为0%层压板的2.5倍左右,其杨氏模量是CF-PLA纤维体积分数为0%层压板的2.3倍左右。
In this paper,carbon fiber polylactic acid(CF-PLA)composites were drawn into fine fibers using three dimensional(3D)printing technology.The short-cut carbon fibers in CF-PLA fibers showed directional arrangement,which enhanced the mechanical properties of CF-PLA fibers.The mechanical properties and surface morphology of CF-PLA fibers were analyzed using an electronic universal testing machine and a scanning electron microscopy,respectively.The experimental results show that the diameters of CF-PLA fibers prepared at the pumping back rate of 5 mm/s are continuous and uniform.Meanwhile,the diameters range of CF-PLA fibers are from 74 to 283μm via controlling the movement rate of the print head.The diameter of the CF-PLA fibers decreases gradually with the increase of the print head movement rate.The diameter of CF-PLA fiber is 135μm,which has the maximum tensile strength of 50 MPa and the maximum Young s modulus of 2331 MPa.In addition,the CF-PLA fibers are applied to laminates.Also,the effect of volume fraction of CF-PLA fibers on the mechanical properties of laminates is investigated.Comparing with CF-PLA fiber volume fraction 8%,the tensile strength and Young s modulus of CF-PLA fiber volume fraction 0%increase about 2.5 times and 2.3 times,respectively.
作者
夏法锋
张红哲
李洋
XIA Fafeng;ZHANG Hongzhe;LI Yang(College of Mechanical Science and Engineering,Northeast Petroleum University,Daqing 163318,China;College of Engineering,Northeast Agricultural University,Harbin 150030,China;The Ninth Operation Area of the Second Oil Production Plant,Daqing Oilfield Company Ltd,Daqing 163000,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2023年第8期152-157,共6页
China Plastics Industry
基金
国家自然科学基金(51974089)。
关键词
三维打印
碳纤维
聚乳酸
力学性能
Three Dimensional Printing
Carbon Fiber
Polylactic Acid
Mechanical Property
