3D打印成型的玻璃纤维增强聚乳酸基复合材料  

Glass fiber reinforced polylactic acid composites based on 3D printing technology

作　　者：蔡冯杰 祝成炎[1] 田伟[1] 吕智宁 申晓 

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《纺织学报》2017年第10期13-18,共6页Journal of Textile Research

基　　金：国家国际科技合作专项项目(2011DFB51570)

摘　　要：为解决3D打印树脂基材料强力低的问题,提出利用纤维增强树脂基材料的方法,采用3D打印技术将玻璃纤维和聚乳酸复合并且快速成型,并研究了填充密度和切片层厚对于复合材料力学性能的影响。试验结果表明,当试样打印的填充密度达到90%时,试样的弯曲强度和拉伸强度分别可达到49.26和21.28 MPa。试样切片层厚为0.1 mm时,所得到的拉伸强度和弯曲强度分别为20.4和52.87 MPa。试样的拉伸强度随着切片层厚的增加而减少,随着填充密度的增加而增加。试样的弯曲强度与切片层厚是负相关,与填充密度是正相关。通过分析不同种类试样截面的扫描电镜图发现,纤维束浸润树脂基体的程度与试样的层厚和填充密度密切相关,填充密度的增加和层厚的减少有利于纤维束与树脂基体的结合。In order to solve the problem of low strength in 3-D printing resin-based materials,fibers were used to reinforce the resin-based materials. Glass fibers and polylactic acid were blended and rapidly formed by using 3 D printing technology. The influences of filling density and slice thickness on the mechanical properties of the composites were studied. The results of the mechanical experiments show that the flexural strength and tensile strength of the samples can reach 49. 26 and 21. 28 MPa,respectively,when the filling density of the samples is 90%. When the slice thickness of the sample was0. 1 mm,the obtained tensile strength and flexural strength were 20. 4 and 52. 87 MPa,respectively. By the analysis of the results of mechanical experiments,the tensile strength of the samples decreases as the slice thickness increases,and increases as the filling density increases. The flexural strength of the samples is negatively correlated with the slice thickness,and is positively correlated with the filling density. By analyzing scanning electron microscopy images of cross sections of different kinds of samples,the degree of fiber bundle infiltration resin matrix is closely related to the slice thickness and filling density of the samples,and the increase in filling density and the reduction in slice thickness facilitate the bonding of the fiber bundles with the resin matrix.

关 键 词：玻璃纤维 3D打印 弯曲性能 拉伸性能 聚乳酸 

分 类 号：TS131.9[轻工技术与工程—纺织材料与纺织品设计]