Polydopamine/polystyrene nanocomposite double-layer strain sensor hydrogel with mechanical, self-healing, adhesive and conductive properties

Han, Linglin; Liu, Mengfei; Yan, Bin; Li, YueShan; Lan, Ji; Shi, Lingying; Ran, Rong

doi:10.1016/j.msec.2019.110567

Cited by 49 publications

(31 citation statements)

References 45 publications

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Section: Influence Of Nanomaterials On the Properties Of Hydrogelsmentioning

confidence: 99%

“…In order to design self‐healing hydrogels, reversible non‐covalent interactions are widely used, including hydrogen bonds, [59a] electrostatic interactions, [75] host‐guest interactions, [76] hydrophobic interaction, [77] etc. Among the above interactions, the hydrogels mixed with nanomaterials mostly depend on hydrogen bonds [59a] and electrostatic interactions [58] . In recent years, some studies have shown that through dynamic covalent interaction, faster self‐healing gels can be prepared, which renders the hydrogel more environmentally friendly and greatly improves the utilization of materials [59b] .…”

Section: Influence Of Nanomaterials On the Properties Of Hydrogelsmentioning

confidence: 99%

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Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

et al. 2021

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In recent years, due to their good physical and chemical properties, nanocomposite hydrogels have shown great application potential in the fields of biomedicine, sensors, 3D printing, and water pollution control. Compared with pure polymer hydrogels, the superior performance of nanocomposite hydrogels is mainly due to the influence of nanomaterials on the internal structure and composition of the hydrogels. In this paper, starting from the basic properties required for practical applications of hydrogels, the influence of nanomaterials on the different properties of hydrogels is discussed. Meanwhile, this paper reviews the research status of nanocomposite hydrogels in different application fields, and emphasizes the challenges and development prospects of nanocomposite hydrogel applications.

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Section: Influence Of Nanomaterials On the Properties Of Hydrogelsmentioning

confidence: 99%

Section: Influence Of Nanomaterials On the Properties Of Hydrogelsmentioning

confidence: 99%

Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

et al. 2021

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“…In recent studies of self-healing ionic conductive hydrogel flexible sensors, conductive ions such as Fe 3+ , [124,125] Na + , [126][127][128][129] [110] glycerol-plasticized polyvinyl alcohol-borax (PVA-borax) / 0.05 [111] polyvinyl alcohol, phenylboronic acid grafted alginate, and polyacrylamide 1.1 × 10 −2 0.064 [112] polyvinyl alcohol and borax / 0.23 [74] Carbon nanotubes polyacrylamide /chitosan hybrid / 0.06 [113] hydrophobic associated polyacrylamide hydrogel / 0.3 [114] Polyacrylamide hydrogels 0.5 0.91 [115] Silver nanoparticles polyion complex/polyaniline hybrid / 3. Al 3+ , [130] ammonium persulfate, [131] sulfuric acid, [132] and lithium chloride [133,134] have been reported. Chen et al fabricated a robust, tough and self-healing ionically conductive hydrogel sensors based on synergistic multiple non-covalent bonds between carboxymethyl guar gum (CMGG), poly (acrylic acid) (PAA) and iron metal ions (Fe 3+ ).…”

Section: Conductivity Of Hydrogel Flexible Sensormentioning

confidence: 99%

“…Among them, the gel deformation ability was improved by adding polystyrene particles, the adhesion of various interfaces was achieved by doping polydopamine nanoparticles, and the gel conductivity was endowed by adding lithium chloride as shown in Figure 8b,d. [133] In addition, selfhealing conductive hydrogels composed of conductive ions and conductive polymers have outstanding performance in tensile strength, such as Fe 3+ /polypyrrole composite conductive hydrogels [135,136] with much higher tensile strength than Fe 3+ conductive hydrogels. [124,125] The sensitivity of self-healing flexible sensors is crucial in practical applications.…”

Section: Conductivity Of Hydrogel Flexible Sensormentioning

confidence: 99%

“…Ion conductive hydrogels consist of a large number of free ions in a 3D polymer network with similar flexibility as biological systems, making them ideal candidates for wearable flexible devices. In recent studies of self‐healing ionic conductive hydrogel flexible sensors, conductive ions such as Fe 3+ , [ 124,125 ] Na + , [ 126–129 ] Al 3+ , [ 130 ] ammonium persulfate, [ 131 ] sulfuric acid, [ 132 ] and lithium chloride [ 133,134 ] have been reported. Chen et al.…”

Section: Self‐healing Hydrogel Flexible Sensormentioning

confidence: 99%

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Flexible Self‐Repairing Materials for Wearable Sensing Applications: Elastomers and Hydrogels

Zhou

Dong

et al. 2020

Macromol. Rapid Commun.

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related operations, and destroy the operation of the whole equipment (system). Bao and his colleagues developed a novel self-healing and mechanical force-sensing flexible sensor using micro-structured elastomeric dielectrics, which served as a foundation to improve the stability and lifetime of flexible sensors. [8] Self-healing flexible materials can be divided into two categories, one is solvent-less or water-free after curing and high degree of polymerization of elastomers, such as polyamide, polyurethane, etc., the other is hydrogels, low degree of polymerization, structural cross-linking. In self-healing flexible elastomer sensors, the structure of elastomer is mostly linear structure or semi-cross-linked structure; the elastomer of cross-linked structure is poor flexibility and fragile due to its high degree of polymerization. The elasticity of semi-crosslinked structure has excellent resilience and great potential in the field of flexible flexural sensors. In the past two years, self-healing flexible hydrogels have attracted extensive attention due to their excellent stretchability and resilience, as well as outstanding performance in the preparation of sensors with high sensitivity and fast response. [9,10] Sensors with elastomers and hydrogels as flexible matrices face great difficulties in conductivity, which affects the sensitivity and stability of the sensors. Filling conductive materials is the most commonly method, in which organic conductive polymers (polyaniline, [11] polypyrrole [12]) are filled to construct conductive networks, and good interfacial compatibility results in uniform conductive polymer elastomers, but the inherent color fillers affect the transparency of flexible sensors, limiting their applications in the biomedical field. [13-17] Flexible materials filled with inorganic conductive particles (graphene, nano-silver wire) have high conductivity, but phase separation between filler and matrix usually reduces the tensile, toughness and fatigue resistance, and even affects the self-healing ability of flexible materials. Modified fillers are often required to improve affinity for flexible matrices and inhibit phase separation. However, many hydrogel matrices are intrinsically weak and cannot withstand cyclic loadings. [18] Although surface modified fillers can improve strength and toughness, it is difficult to compensate for the inherent weaknesses. For self-healing flexible elastomers, conductive flexible materials can still be endowed with conductivity by scraping or printing conductive particles on the Flexible pressure and strain sensors have great potential for applications in wearable and implantable devices, soft robots, and artificial skin. The introduction of self-healing performance has made a positive contribution to the lifetime and stability of flexible sensors. At present, many self-healing flexible sensors with high sensitivity have been developed to detect the signal of organism activity. The sensitivity, reliability, and stability of self-healing flexible sensors depend...

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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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Polydopamine/polystyrene nanocomposite double-layer strain sensor hydrogel with mechanical, self-healing, adhesive and conductive properties

Cited by 49 publications

References 45 publications

Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

Recent Developments of Nanomaterials in Hydrogels: Characteristics, Influences, and Applications

Flexible Self‐Repairing Materials for Wearable Sensing Applications: Elastomers and Hydrogels

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

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