高强电磁屏蔽环氧复合材料的3D打印工艺研究  

3D printing of epoxy⁃based composites with high strength and electromagnetic interference shielding ability

作　　者：曲道鹏 张涛 华晨曦 宋欣雨 程昌利 刘禹 王震宇 QU Daopeng;ZHANG Tao;HUA Chenxi;SONG Xinyu;CHENG Changli;LIU Yu;WANGZhenyu(School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China;Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Jiangnan University,Wuxi 214122,China;Jiangda Vibration Isolator Co,Ltd,Wuxi 214024,China)

机构地区：[1]江南大学机械工程学院,江苏无锡214122 [2]江南大学江苏省食品先进制造装备技术重点实验室,江苏无锡214122 [3]无锡市江大隔振器有限公司,江苏无锡214024

出　　处：《中国塑料》2024年第9期24-29,共6页China Plastics

基　　金：国家自然科学基金(52375338);“太湖之光”科技攻关计划项目(G20212034);江苏省食品先进制造装备技术重点实验室自主研究课题(FMZ202201)。

摘　　要：通过双喷头直书写3D打印工艺将高强纳米二氧化硅/环氧树脂(SiO2/EP)复合材料和高导电炭黑/环氧树脂(CB/EP)复合材料有序组装为三维交替排列的纳米二氧化硅/炭黑/环氧树脂(SiO2/CB/EP)复合材料。通过流变性能分析,添加11.6%(质量分数,下同)纳米二氧化硅和10%炭黑的环氧树脂具备优异的可打印性,并通过挤出压力和打印速度的调控实现了线宽为400μm的线条稳定成型。结果表明,SiO2/CB/EP复合材料展现了优异的成型精度和规则有序的三维结构;所制备的SiO2/CB/EP复合材料的拉伸、压缩和弯曲强度分别为35、64、120 MPa,相较于SiO2/EP未出现严重衰减;同时,其电磁屏蔽效能最高可达25 dB,且主要以电磁波的吸收为屏蔽机制。A dual-material 3D printing technique is developed to rationally construct nano-silica/carbon black/epoxy(SiO2/CB/EP)composites through alternately arranging nano-silica/epoxy(SiO2/EP)composites with high strength and car-bon black/epoxy(CB/EP)composites with high conductivity.According to the rheological properties,the epoxy com-posites with 11.6 wt.%SiO2 and 10 wt.%CB exhibits excellent printability.A stable diameter of 400μm was achieved through controlling the extrusion pressure and printing speed.The SiO2/CB/EP composites show an excellent manufac-turing accuracy and a highly ordered 3D structure as verified by the optical and micro-CT images.The tensile,compres-sive and bending strengths of the SiO2/CB/EP composites were 35 MPa,64 MPa and 120 MPa,respectively,indicating that there is no attenuation compared to those of the SiO2/EP composites.Moreover,the electromagnetic interference shielding effectiveness of the composites is as high as 25 dB on the basis of the microwave absorbing mechanism.

关 键 词：环氧树脂 复合材料 三维打印 电磁屏蔽 力学性能 

分 类 号：TQ323.5[化学工程—合成树脂塑料工业]