Screen-printable and stretchable hard magnetic ink formulated from barium hexaferrite nanoparticles,Journal of Materials Chemistry C

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Screen-printable and stretchable hard magnetic ink formulated from barium hexaferrite nanoparticles
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2020-08-03 , DOI: 10.1039/d0tc02234a
Connor S. Smith _{1,

2,

3} , Kartik Sondhi _{1,

2,

3} , Sara C. Mills _{2,

3,

4} , Jennifer S. Andrew _{2,

3,

4} , Z. Hugh Fan _{2,

3,

5} , Toshikazu Nishida _{1,

2,

3} , David P. Arnold _{1,

2,

3}

Affiliation

Stretchable electronics have seen an increase in interest for applications in medicine, sensing, and robotics. Current stretchable materials are either intrinsically stretchable, are patterned into stretchable architectures, or are made by forming a composite of some stretchable material and a rigid material with some desired property, such as high conductivity. However, there is a lack of stretchable magnetic materials available in the literature, and devices that combine stretchability and magnetics are limited to using serial fabrication processes such as embedding millimeter scale pieces of magnet into polymer matrices. In this work, a stretchable composite hard magnetic ink made by mixing barium hexaferrite nanoparticles with 9510 one-part epoxy potting compound and di(propylene glycol)methyl ether is presented. Using screen printing methods, the ink is then used to fabricate a magnetic strain sensor, which acts as a proof-of-concept for the material and process. Results indicate that a stretchable hard magnetic ink can be made that provides a remnant magnetization of 20 kA m⁻¹ from the barium hexaferrite particle inclusions, as well as a stretchability of at least 100% strain from the epoxy.

中文翻译：

由六价铁酸钡纳米粒子配制的可丝网印刷和可拉伸的硬磁油墨

可伸展的电子技术在医学，传感和机器人技术领域的兴趣不断增长。当前的可拉伸材料要么本质上可拉伸，要么被构图成可拉伸的结构，或者通过形成一些可拉伸材料和具有某些期望特性（例如高导电性）的刚性材料的复合材料而制成。然而，在文献中缺乏可拉伸的磁性材料，并且将可拉伸性与磁性结合的装置限于使用串行制造工艺，例如将毫米级的磁体块嵌入到聚合物基质中。在这项工作中，提出了一种可伸缩的复合硬磁油墨，该油墨是将六价铁酸钡纳米粒子与9510单组分环氧灌封胶和二（丙二醇）甲基醚混合制成的。使用丝网印刷方法然后，墨水将用于制造磁应变传感器，该磁应变传感器可作为材料和工艺的概念证明。结果表明，可以制得可提供20 kA m剩余磁化强度的可拉伸硬磁油墨。来自六价铁酸钡颗粒夹杂物的^-1，以及来自环氧树脂的至少100％应变的拉伸性。

更新日期：2020-09-20

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