Skin-like Omnidirectional Stretchable Platform with Negative Poisson’s Ratio for Wearable Strain–Pressure Simultaneous Sensor

Min Seong Kim; Yung Lee; Junseong AhnSeonggi KimKyungnam KangHyuneui LimByeong-Soo BaeInkyu Park

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Skin-like Omnidirectional Stretchable Platform with Negative Poisson’s Ratio for Wearable Strain–Pressure Simultaneous Sensor

机译：Skin-like Omnidirectional Stretchable Platform with Negative Poisson’s Ratio for Wearable Strain–Pressure Simultaneous Sensor

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Conventional elastomeric polymers used as substrates for wearable platformshave large positive Poisson’s ratios (≈0.5) that cause a deformation mismatchwith human skin that is multidirectionally elongated under bending of joints.This causes practical problems in elastomer-based wearable devices, suchas delamination and detachment, leading to poorly reliable functionality. Toovercome this issue, auxetic-structured mechanical reinforcement with glassfibers is applied to the elastomeric film, resulting in a negative Poisson’s ratio(NPR), which is a skin-like stretchable substrate (SLSS). Several parametersfor determining the materials and geometrical dimensions of the auxeticstructuredreinforcing fillers are considered to maximize the NPR. Basedon numerical simulation and digital image correlation analysis, the deformationtendencies and strain distribution of the SLSS are investigated andcompared with those of the pristine elastomeric substrate. Owing to thestrain-localization characteristics, an independent strain-pressure sensingsystem is fabricated using SLSS with a Ag-based elastomeric ink and a carbonnanotube-based force-sensitive resistor. Finally, it is demonstrated that theSLSS-based sensor platform can be applied as a wearable device to monitorthe physical burden on the wrist in real time.

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来源
《Advanced functional materials》 |2023年第3期|2208792.1-2208792.10|共10页
作者
Min Seong Kim; Yung Lee; Junseong AhnSeonggi KimKyungnam KangHyuneui LimByeong-Soo BaeInkyu Park;
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作者单位

Nano Nature-inspired LaboratoryKorea Institute of Machinery and Materials (KIMM)Daejeon 34103, Republic of Korea;

Department of Mechanical EngineeringKorea Advanced Institute of Science and Technology (KAIST)Daejeon 34141, Republic of Korea;

Department of Material Science and EngineeringKorea Advanced Institute of Science and Technology (KAIST)Daejeon 34141, Republic of Korea, Wearable Platform Materials Technology Center (WMC)Korea Advanced Institute of Science and Technology (KAIST)Daejeon;

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正文语种英语
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auxetic structures; negative Poisson’s ratio; pressure sensors; strain sensors; stretchable platforms; wearable electronics;

Skin-like Omnidirectional Stretchable Platform with Negative Poisson’s Ratio for Wearable Strain–Pressure Simultaneous Sensor

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