固液桥联复合材料的双材料直写制备及电磁屏蔽性能
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1.江南大学 机械工程学院;2.无锡市江大隔振器有限公司

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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)


Dual-material direct ink writing of bridged solid-liquid composites with high electromagnetic interference shielding performances
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1.School of Mechanical Engineering,Jiangnan University;2.Jiangda Vibration Isolator CO,LTD

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    摘要:

    以高粘度硅橡胶作为固相墨水,以炭黑/低粘度硅橡胶作为液相墨水,使用双材料直写工艺制备具有规则固液桥联结构的纳米复合材料。通过旋转流变仪对两种墨水的可打印性进行评估,采用光学显微镜与Micro-CT对复合材料的结构进行表征,系统评估了复合材料的拉伸性能、电导率以及电磁屏蔽效能。结果表明,复合材料的断裂伸长率、电导率以及电磁屏蔽效能均随着液相桥联跨度的增大而提高,最高分别可达233%、0.45S/m以及25dB。此外,在外部变形作用下,由于导电液相始终保持连通,不同桥联跨度的复合材料均展现了极小的性能衰减,使得其在柔性电磁屏蔽器件领域具有良好的应用前景。

    Abstract:

    Nanocomposites with ordered bridged solid-liquid structures are prepared through a dual-material direct ink writing technique, using high-viscosity silicone rubber as the solid-phase ink and carbon black/low-viscosity silicone rubber as the liquid-phase ink. The printability of the two inks is evaluated by rotational rheometer, and the structures of the composites are characterized by optical microscopy and micro-CT. Tensile properties, electrical conductivity, and electromagnetic interference (EMI) shielding effectiveness of the composites are investigated. The results show that the elongation at break, conductivity, and EMI shielding effectiveness increase with the increased bridging span of the liquid bridge, exhibiting high values up to 233%, 0.45 S/m, and 25 dB, respectively. Besides, negligible performance degradation is observed for the nanocomposites at external deformations, because the conductive liquid bridge remains always connected, giving it a great potential in applications such as flexible EMI shielding devices.

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邵朋朋,徐势轩,华晨曦,宋欣雨,程昌利,刘禹,王震宇.固液桥联复合材料的双材料直写制备及电磁屏蔽性能[J].精细化工,2024,41(12):

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  • 收稿日期:2024-01-15
  • 最后修改日期:2024-03-15
  • 录用日期:2024-03-04
  • 在线发布日期: 2024-12-10
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