External field alignment of nickel-coated carbon fiber/PDMS composite for biological monitoring with high sensitivity

Author:

Jin Shuxiang1,Zhang Bailang2,Liu Xueqing3,Yang Bin4,Ge Ruifeng1,Qiang Zhe5,Chen Yuwei2

Affiliation:

1. Department of Otorhinolaryngology-Head and Neck Surgery , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China

2. Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-Plastics , Qingdao University of Science & Technology , Qingdao City , 266042 , China

3. Key Laboratory of Optoelectronic Chemical Materials and Devices, Ministry of Education and Flexible Display Materials and Technology Co-innovation Centre of Hubei Province , Jianghan University , Wuhan , 430056 , Chinas

4. Department of Urology , The Affiliated Hospital of Qingdao University , Qingdao , Shandong Province , China

5. School of Polymer Science and Engineering , The University of Southern Mississippi , Hattiesburg , MS , 39406 , USA

Abstract

Abstract Flexible, pressure-sensitive composites can be prepared through the inclusion of electrically conductive particles as functional fillers into an elastomeric polymer matrix, which have been used for the applications of wearable devices for health monitoring and electronic skins. A key challenge associated with these composites is developing anisotropic pressure sensitivity while retaining their flexibility (or low filler content). Herein, we demonstrate a simple and scalable method for aligning anisotropic nickel-coated carbon fibers (NiCF) along with the thickness direction of a polymer matrix by applying a magnetic field. The aligning mechanisms and kinetics of NiCF in the polydimethylsiloxane (PDMS) precursor are revealed by in situ optical microscopy images while a magnetic field is applied. The aligned nickel-coated carbon fibers in the polymer effectively endow the composite films excellent pressure-sensitive performance. The pressure sensitivity of NiCF/PDMS composite films has been systematically studied and can be used for biological monitoring. We believe that this magnetic field assisted processing strategy provides a promising material solution for manufacturing fiber embedded polymer composites with enhanced pressure sensitivity, which is essential for future wearable health monitoring electronics and electronic skin.

Funder

Open Fund of Key Laboratory of Rubber Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics

National key Laboratory on ship vibration and noise

Opening Project of Key Laboratory of Optoelectronic Chemical Materials and Devices of Ministry of Education, Jianghan University

Team Innovation Foundation of Hubei province

National Natural Science Foundation of China

Publisher

Walter de Gruyter GmbH

Subject

Materials Chemistry,Polymers and Plastics,General Chemical Engineering

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