摘要
采用激光技术对3D打印机制备的聚醚酰亚胺(PEI)、聚醚醚酮(PEEK)和聚醚醚酮/碳纤维(PEEK/CF)制件表面进行处理,研究了激光处理对3种制件的表面结构、粗糙度、润湿性及胶接强度的影响;探究了激光处理对制件胶接强度增强机理。结果表明,经激光处理的制件表面形成沟槽结构,表面粗糙度增加,制件表面由亲水变为疏水。以胶膜为胶黏剂时,PEEK和PEEK/CF制件的胶接强度分别从2.5 MPa和3.28 MPa增加到3.71 MPa和5.06 MPa;以液体胶为胶黏剂时,PEEK和PEEK/CF制件的胶接强度分别从2.36 MPa和2.41 MPa增加到6.79 MPa和5.06 MPa,提升幅度可达188%和154%。而激光处理对PEI制件的胶接强度无显著影响;激光处理的制件胶接强度的增强是制件胶接面间形成机械咬合作用和含氧官能团与胶黏剂间形成化学交联共同作用的结果。
Laser treatment method was applied to modify the surface of 3D-printed polyetherimide(PEI),polyether ether ketone(PEEK)and polyether ether ketone/carbon fiber(PEEK/CF)specimens.The effect of laser treatment on the surface structure,roughness,wettability and bonding strength of three sample surfaces was studied,and the bonding enhancement mechanisms of laser treatment were discussed.The results show that grooves are formed on the surface of samples,which increases the roughness and hydrophobicity of the sample surface after laser treatment.The shear bond strength of PEEK and PEEK/CF specimens is increased from 2.5 MPa and 3.28 MPa to 3.71 MPa and 5.06 MPa by applying adhesive film,respectively.When the liquid glue is used as adhesive,the shear bond strength of PEEK and PEEK/CF specimens is improved from 2.36 MPa and 2.41 MPa to 6.79 MPa and 5.06 MPa,with an increase 188%and 154%,respectively.However,the laser treatment has no significant impact on the adhesion strength of PEI parts.The bonding strength enhancement mechanism of laser-treated parts is mainly due to the mechanical interlocking effect and chemical cross-linking interaction between the sample oxygen-containing functional groups and adhesive.
作者
李卫杰
张伟
李元成
桑琳
秦凤鸣
李楠
王锦艳
蹇锡高
Weijie Li;Wei Zhang;Yuancheng Li;Lin Sang;Fengming Qin;Nan Li;Jinyan Wang;Xigao Jian(Department of Polymer Science and Materials,School of Chemical Engineering,Dalian University of Technology,Dalian 116024,China;Avic Manufacturing Technology Institute,Beijing 100024,China;School of Automotive Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2021年第12期75-82,共8页
Polymer Materials Science & Engineering
基金
大连市科技局重点研发基金(2018J11CY007)
国家自然科学基金资助项目(U1837205)
东华大学纤维材料改性国家重点实验室开放课题(KF2002)
国家重点研发计划项目(2020YFB031160)。
关键词
3D打印
胶接强度
飞秒激光
3D printing
bonding strength
femtosecond laser
