A highly sensitive strain sensor based on a silica@polyaniline core–shell particle reinforced hydrogel with excellent flexibility, stretchability, toughness and conductivity

Li, Youqiang; Liu, Chuang; Liu, Xue

doi:10.1039/d0sm01998d

Cited by 38 publications

(35 citation statements)

References 65 publications

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“…Implementation of a synergistic combination of hydrophobic association and nanocomposite-based strain sensor fabrication smoothens the hydrophobicity problems. In particular, PANI shell structure offers hydrophobic association between copolymer and the core, thereby affirming the uniform dispersion due to the physical crosslinking aspects [132]. Despite achieving body motion, strain sensing, and pressure sensing, sensors on board were capable of monitoring strain along with different parameters including pressure, temperature, and volatile organic compounds, to perform multisensory tasks.…”

Section: Polyaniline Sensorsmentioning

confidence: 99%

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

et al. 2021

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The Conducting of polymers belongs to the class of polymers exhibiting excellence in electrical performances because of their intrinsic delocalized π- electrons and their tunability ranges from semi-conductive to metallic conductive regime. Conducting polymers and their composites serve greater functionality in the application of strain and pressure sensors, especially in yielding a better figure of merits, such as improved sensitivity, sensing range, durability, and mechanical robustness. The electrospinning process allows the formation of micro to nano-dimensional fibers with solution-processing attributes and offers an exciting aspect ratio by forming ultra-long fibrous structures. This review comprehensively covers the fundamentals of conducting polymers, sensor fabrication, working modes, and recent trends in achieving the sensitivity, wide-sensing range, reduced hysteresis, and durability of thin film, porous, and nanofibrous sensors. Furthermore, nanofiber and textile-based sensory device importance and its growth towards futuristic wearable electronics in a technological era was systematically reviewed to overcome the existing challenges.

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Section: Polyaniline Sensorsmentioning

confidence: 99%

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

et al. 2021

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“…[115] NNHs can however enable exceptionally high gauge factors, with Li et al recently reporting an NNH strain sensor based on soft SiO 2 -coated PANI NPs with PAAm-co-LMA exhibiting a GF up to 10.4 when stretched beyond 200% strain. [6] NP Dashes represent info that is not cited in the paper.…”

Section: Electrochemical Sensorsmentioning

confidence: 99%

“…Such structures directly integrate the functional nanoparticle phase into the bulk gel phase and thus can lead to a series of mechanical and functional benefits in various applications. In particular, by linking nanoparticles directly into the network, the available diversity of nanoparticles in terms of size (i.e., altering crosslinking density with large versus small nanoparticles [ 5 ] ), shape (e.g., regulating NC conductivity based on using spherical, [ 6 ] tubular, [ 7 ] or sheet‐like [ 8 ] nanoparticles), and functionality (e.g., conductive, [ 6 ] antibacterial, [ 9 ] magnetic, [ 10 ] etc.) can be more effectively leveraged to dictate the morphology and corresponding functions of the NNH.…”

Section: Introductionmentioning

confidence: 99%

A Review of Design and Fabrication Methods for Nanoparticle Network Hydrogels for Biomedical, Environmental, and Industrial Applications

Campea

Majcher

Lofts

et al. 2021

Adv Funct Materials

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Nanoparticle network hydrogels (NNHs) in which nanoparticles are used as a key building block to build the gel network have attracted significant interest given their potential to leverage the favorable properties of both hydrogels (e.g., hydrophilicity, tunable pore sizes, mechanics, etc.) and a variety of different nanoparticles (e.g., high surface area, chemical activity, independently tunable porosity, mechanics) to create new functional materials. Herein, recent progress in the design and use of NNHs is comprehensively reviewed, with an emphasis on defining the typical gel morphologies/architectures that can be achieved with NNHs, the typical crosslinking approaches used to fabricate NNHs, the fundamental properties and functional benefits of NNHs, and the reported applications of NNHs in electronics (flexible electronics, sensors), environmental (sorbents, separations), agriculture, self‐cleaning‐materials, and biomedical (drug delivery, tissue engineering) applications. In particular, the way in which the NNH structure is applied to improve the performance of the hydrogel in each application is emphasized, with the aim to develop a set of principles that can be used to rationally design NNHs for future uses.

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“…In recent years, breakthroughs have been made in research on hydrogels, but most hydrogels still have poor mechanical strength and are susceptible to damage (accidental fracture, etc. ), leading to some microscopic or macroscopic cracks [79,80]. As these cracks are further extended, the structure of the hydrogel network is destroyed, its mechanical properties are significantly reduced and its original function is lost, resulting in a waste of resources.…”

Section: Self-healing Mechanism Of Hydrogelmentioning

confidence: 99%

Self-Healing Mechanism and Conductivity of the Hydrogel Flexible Sensors: A Review

Zhang

Wang

Wei

et al. 2021

Gels

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Sensors are devices that can capture changes in environmental parameters and convert them into electrical signals to output, which are widely used in all aspects of life. Flexible sensors, sensors made of flexible materials, not only overcome the limitations of the environment on detection devices but also expand the application of sensors in human health and biomedicine. Conductivity and flexibility are the most important parameters for flexible sensors, and hydrogels are currently considered to be an ideal matrix material due to their excellent flexibility and biocompatibility. In particular, compared with flexible sensors based on elastomers with a high modulus, the hydrogel sensor has better stretchability and can be tightly attached to the surface of objects. However, for hydrogel sensors, a poor mechanical lifetime is always an issue. To address this challenge, a self-healing hydrogel has been proposed. Currently, a large number of studies on the self-healing property have been performed, and numerous exciting results have been obtained, but there are few detailed reviews focusing on the self-healing mechanism and conductivity of hydrogel flexible sensors. This paper presents an overview of self-healing hydrogel flexible sensors, focusing on their self-healing mechanism and conductivity. Moreover, the advantages and disadvantages of different types of sensors have been summarized and discussed. Finally, the key issues and challenges for self-healing flexible sensors are also identified and discussed along with recommendations for the future.

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A highly sensitive strain sensor based on a silica@polyaniline core–shell particle reinforced hydrogel with excellent flexibility, stretchability, toughness and conductivity

Abstract: Hydrophobic association and nano-hybrid with SiO2@PANI core–shell nanoparticles endow P(AM/LMA) hydrogel with excellent mechanical strength, fatigue resistance and wonderful strain sensitivity.

Cited by 38 publications

References 65 publications

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

Recent Progress in Conducting Polymer Composite/Nanofiber-Based Strain and Pressure Sensors

A Review of Design and Fabrication Methods for Nanoparticle Network Hydrogels for Biomedical, Environmental, and Industrial Applications

Self-Healing Mechanism and Conductivity of the Hydrogel Flexible Sensors: A Review

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