中国塑料 ›› 2024, Vol. 38 ›› Issue (9): 24-29.DOI: 10.19491/j.issn.1001-9278.2024.09.005

• 材料与性能 • 上一篇    下一篇

高强电磁屏蔽环氧复合材料的3D打印工艺研究

曲道鹏1(), 张涛1, 华晨曦1, 宋欣雨1, 程昌利3, 刘禹1, 王震宇1,2()   

  1. 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
  • 收稿日期:2023-12-28 出版日期:2024-09-26 发布日期:2024-09-27
  • 通讯作者: 王震宇(1991-),男,副教授,硕士生导师,主要研究方向为纳米复合材料的增材制造工艺,zywang@jiangnan.edu.cn
    E-mail:18854891217@163.com;zywang@jiangnan.edu.cn
  • 作者简介:曲道鹏(1998-),男,在读硕士研究生,主要研究方向为环氧复合材料直书写3D打印及性能测试,18854891217@163.com
  • 基金资助:
    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)

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

QU Daopeng1(), ZHANG Tao1, HUA Chenxi1, SONG Xinyu1, CHENG Changli3, LIU Yu1, WANG Zhenyu1,2()   

  1. 1.School of Mechanical Engineering,Jiangnan University,Wuxi 214122,China
    2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology,Jiangnan University,Wuxi 214122,China
    3.Jiangda Vibration Isolator Co,Ltd,Wuxi 214024,China
  • Received:2023-12-28 Online:2024-09-26 Published:2024-09-27
  • Contact: WANG Zhenyu E-mail:18854891217@163.com;zywang@jiangnan.edu.cn

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400 μm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。

关键词: 环氧树脂, 复合材料, 三维打印, 电磁屏蔽, 力学性能

Abstract:

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 carbon black/epoxy (CB/EP) composites with high conductivity. According to the rheological properties, the epoxy composites with 11.6 wt.% SiO2 and 10 wt.% CB exhibits excellent printability. A stable diameter of 400 μm was achieved through controlling the extrusion pressure and printing speed. The SiO2/CB/EP composites show an excellent manufacturing accuracy and a highly ordered 3D structure as verified by the optical and micro⁃CT images. The tensile, compressive 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.

Key words: epoxy, composite, three?dimensional printing, electromagnetic interference shielding, mechanical property

中图分类号: