Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/138867
Title: Lightweight, superelastic boron nitride/polydimethylsiloxane foam as air dielectric substitute for multifunctional capacitive sensor applications
Authors: Tay, Roland Yingjie
Li, Hongling
Lin, Jinjun
Wang, Hong
Lim, Jacob Song Kiat
Chen, Shuai
Leong, Wei Lin
Tsang, Siu Hon
Teo, Edwin Hang Tong
Keywords: Engineering::Electrical and electronic engineering
Engineering::Materials
Issue Date: 2020
Source: Tay, R. Y., Li, H., Lin, J., Wang, H., Lim, J. S. K., Chen, S., . . . Teo, E. H. T. (2020). Lightweight, superelastic boron nitride/polydimethylsiloxane foam as air dielectric substitute for multifunctional capacitive sensor applications. Advanced Functional Materials, 30(10), 1909604-. doi:10.1002/adfm.201909604
Journal: Advanced Functional Materials 
Abstract: Porous polymeric foams as dielectric layer for highly sensitive capacitive based pressure sensors have been extensively explored owing to their excellent flexibility and elasticity. Despite intensive efforts, most of previously reported porous polymer foams still suffer from difficulty in further lowering the attainable density limit of ≈0.1 g cm−3 while retaining high sensitivity and compressibility due to the limitations on existing fabrication techniques and materials. Herein, utilizing 3D interconnected networks of few‐layer hexagonal boron nitride foams (h‐BNFs) as supporting frameworks, lightweight and highly porous BN/polydimethylsiloxane composite foams (BNF@PDMS) with densities reaching as low as 15 mg cm−3 and permittivity close to that of air are fabricated. This is the lightest PDMS‐based foam reported to date. Owing to the synergistic effects between BN and PDMS, these lightweight composite foams possess excellent mechanical resilience, extremely high compressibility (up to 95% strain), good cyclic performance, and superelasticity. Being electrically nonconductive, the potential application of BNF@PDMS as a dielectric layer for capacitive sensors is further demonstrated. Remarkably, the as‐fabricated device can perform multiple sensing functions such as noncontact touch sensor, environmental monitoring sensor, and high sensitivity pressure sensor that can detect extremely low pressures of below 1 Pa.
URI: https://hdl.handle.net/10356/138867
ISSN: 1616-301X
DOI: 10.1002/adfm.201909604
Rights: This is the peer reviewed version of the following article: Tay, R. Y., Li, H., Lin, J., Wang, H., Lim, J. S. K., Chen, S., . . . Teo, E. H. T. (2020). Lightweight, superelastic boron nitride/polydimethylsiloxane foam as air dielectric substitute for multifunctional capacitive sensor applications. Advanced Functional Materials, 30(10), 1909604-. doi:10.1002/adfm.201909604, which has been published in final form at 10.1002/adfm.201909604. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: embargo_20210310
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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