3D printable resin/carbon nanotube composites for wearable strain sensors: Enhancing mechanical and electrical properties

Poompiew, Nutthapong; Pattananuwat, Prasit; Aumnate, Chuanchom; Román, Allen Jonathan; Osswald, Tim A.; Potiyaraj, Pranut

doi:10.1016/j.jsamd.2023.100546

Cited by 9 publications

(4 citation statements)

References 49 publications

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“…The 3D printing elastomer PEA‐1/IDA‐20 prepared in this study has impressive mechanical properties as well as good resilience to support its recycling. Since the majority of photocurable resins are not electrically conductive, various highly conductive materials, such as metal, [ 41 ] graphene, [ 42 ] CNTs, [ 43 ] and silver, [ 44 ] are required to combine with them to prepare electronic devices. In order to meet the recycling requirements of 3D‐printed devices, soft ionic hydrogel containing free conductive ions was taken.…”

Section: Resultsmentioning

confidence: 99%

3D Printing of Branched Polyurethane with Tough Mechanical Properties for Stretchable Sensors

Shuai,

Zhang,

Yao

et al. 2023

Adv Eng Mater

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The poor mechanical properties and difficulties in manufacturing complex structures seriously limit the applications of elastomers especially in flexible electronic sensor. Herein, a series of polyether amine (PEA) grafted polyurethane acrylate oligomers (PUA‐g‐PEAs) and the corresponding low‐viscosity UV‐curable flexible 3D printing elastomers (PEA‐1/IDAs) were synthesized. The results showed that a certain amount of PEA branch exactly had strengthening and toughening effect on polyurethane, resulting in 12% increase in tensile strength and 44% increase in elongation at break of PUA‐g‐PEA‐1. When mixed PUA‐g‐PEA‐1with ACMO and IDA in the ratio of 3:5:2, PEA‐1/IDA‐20 with best overall mechanical properties was obtained. Its tensile strength and elongation at break were 18.5 MPa and 297.4%, respectively. The unprecedented fatigue resistance of PEA‐1/IDA‐20 ensured that it can withstand 100 compression cycles at 80% strain without damage. Besides, piezoresistive sensors and wearable finger guard sensors were fabricated by laminating a layer of conductive hydrogel on the surface of the 3D‐printed devices. The impressive mechanical properties and 3D printing producing process of this branched PUA endow it with great potentials in advanced electronic sensors.This article is protected by copyright. All rights reserved.

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Section: Resultsmentioning

confidence: 99%

3D Printing of Branched Polyurethane with Tough Mechanical Properties for Stretchable Sensors

Shuai,

Zhang,

Yao

et al. 2023

Adv Eng Mater

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“…Comparative analysis of our strain sensors with existing fabrication methods, such as those discussed in Poompiew et al [29], Niranjan et al [30], and ur Rehman et al [31], reveals distinct advantages in terms of gauge factors, and potential applications. Our fabricated strain sensors demonstrate superior gauge factors of 144.5 and 167.94 for composite configurations of MWCNT/PANI and MWCNT/PANI/silicone rubber, respectively.…”

Section: Introductionmentioning

confidence: 94%

A Sensitive Strain Sensor Based on Multi-Walled Carbon Nanotubes/Polyaniline/Silicone Rubber Nanocomposite for Human Motion Detection

Hosseini,

Norouzi,

2023

Sci

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Strain sensors play a pivotal role in quantifying stress and strain across diverse domains, encompassing engineering, industry, and medicine. Their applicability has recently extended into the realm of wearable electronics, enabling real-time monitoring of body movements. However, conventional strain sensors, while extensively employed, grapple with limitations such as diminished sensitivity, suboptimal tensile strength, and susceptibility to environmental factors. In contrast, polymer-based composite strain sensors have gained prominence for their capability to surmount these challenges. The integration of carbon nanotubes (CNTs) as reinforcing agents within the polymer matrix ushers in a transformative era, bolstering mechanical strength, electrical conductivity, and thermal stability. This study comprises three primary components: simulation, synthesis of nanocomposites for strain sensor fabrication, and preparation of a comprehensive measurement set for testing purposes. The fabricated strain sensors, incorporating a robust polymer matrix of polyaniline known for its exceptional conductivity and reinforced with carbon nanotubes as strengthening agents, demonstrate good characteristics, including a high gauge factor, stability, and low hysteresis. Moreover, they exhibit high strain sensitivity and show linearity in resistance changes concerning applied strain. Comparative analysis reveals that the resulting gauge factors for composite strain sensors consisting of carbon nanotubes/polyaniline and carbon nanotubes/polyaniline/silicone rubber are 144.5 and 167.94, respectively.

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“…Many researchers have focused on preparing the strain sensor from the CNTs as an additive agent. [31][32][33][34] Flexible strain sensors fabricated by spraying carbon nanomaterials on the surface of flexible substrates can achieve higher GF, but usually have a limited sensing range. Excessive strain will cause the carbon nanomaterials to fall off from the substrate, which results in a lower GF.…”

Section: Introductionmentioning

confidence: 99%

A high-sensitivity wearable flexible strain sensor based on three-dimensional twist-like network structure

Liu,

Jia,

Zhang

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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With the rapid development of the flexible electronics field, flexible pressure sensors are widely used inwearable devices, medical monitoring and other fields. However, it is still a huge challenge to design a sensor with highsensitivity, low cost and a simple manufacturing process. In this work, we report a flexible strain sensor based on discarded mask straps (MS) with a unique three-dimensional (3D) twist-like network structure. Multi-walled carbon nanotubes (MWCNTs)/carbon nanoparticles (CN)/MS composites were prepared by a simple dip-drying method and encapsulated using a medical Polyurethane (PU) film. It is founded that the fabricated MWCNTs/CN/MS/PU flexible strain sensor (MCMP-FSS) exhibits a high gauge factor (GF) of 13,928 and advanced performance with a large sensing range of 0%–72%. Moreover, good water-repellent harmony and various types of stimuli over 1000 cycles were obtained for the MCMP-FSS. Benefiting from the unique 3D twist-like network structure and the MWCNTs/CN synergistic conductive network, MCMP-FSS also has broad application prospects in the fields of human motion detection, encrypted communication, and natural human-robot interaction.

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3D printable resin/carbon nanotube composites for wearable strain sensors: Enhancing mechanical and electrical properties

Cited by 9 publications

References 49 publications

3D Printing of Branched Polyurethane with Tough Mechanical Properties for Stretchable Sensors

3D Printing of Branched Polyurethane with Tough Mechanical Properties for Stretchable Sensors

A Sensitive Strain Sensor Based on Multi-Walled Carbon Nanotubes/Polyaniline/Silicone Rubber Nanocomposite for Human Motion Detection

A high-sensitivity wearable flexible strain sensor based on three-dimensional twist-like network structure

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