Biomineral calcium-ion-mediated conductive hydrogels with high stretchability and self-adhesiveness for sensitive iontronic sensors

Bai, Jiahui; Wang, Ran; Wang, Xiaoming; Liu, Shide; Wang, Xinliang; Ma, Jinming; Qin, Zhihui; Jiao, Tifeng

doi:10.1016/j.xcrp.2021.100623

Cited by 56 publications

(39 citation statements)

References 60 publications

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“…5b, the GF of the MCP hydrogel splits into two linear response regions of 3.25 (R 2 = 0.99) for 0%-400% and 8.83 (R 2 = 0.99) for 400%-1000%. The high sensitivity with the large work range of the MCP hydrogel is superior to previously reported hydrogels [9,10,17,[53][54][55]. The strain responsiveness might be explained by the following reasons: MXene nanosheets were interconnected in a hydrogel matrix to form a conductive network framework for the electron transport, resulting in a good electrical conductivity.…”

Section: Strain Sensing Properties Of the Mcp Hydrogelmentioning

confidence: 89%

“…Meanwhile, continuous body temperature monitoring is critical for the early warning and diagnosis of diseases [7]. Conductive hydrogels have recently received extensive investigation as promising materials for flexible sensing applications due to their excellent conductivity and tunable mechanical properties [8][9][10][11][12]. These sensing applications require conductive hydrogels to be highly sensitive, stretchable with high resilience, and easily adhesive to complex surfaces [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Interface interaction-mediated design of tough and conductive MXene-composited polymer hydrogel with high stretchability and low hysteresis for high-performance multiple sensing

Wang

et al. 2022

Sci. China Mater.

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Conductive hydrogels based on two-dimensional (2D) nanomaterials, MXene, have emerged as promising materials for flexible wearable sensors. In these applications, the integration of high toughness, ultrastretchability, low hysteresis, self-adhesiveness, and multiple sensory functions into one gel is essential. However, serious issues, such as easy restacking and inevitable oxidation of MXene nanosheets in aqueous media and weak interfacial bindings between MXene and the gel network, make it almost impossible to achieve the multiple performances mentioned above. Here we present a conductive MXene-composited polymer (MCP) hydrogel by incorporating gelatin-modified MXene into polyacrylamide (PAAm) hydrogel for the fabrication of multifunctional sensors. The presence of gelatin not only greatly improves the stability of the MXene nanosheets by forming a protective sheath, but also largely enhances the interfacial interactions between the MXene and the hydrogel network as molecular glues. Thus, the MCP hydrogel exhibits a high strength (430 kPa), remarkable stretchability (1100%), low hysteresis (<10% at 500% cyclic tensile), and excellent repeatable adhesion. The resultant MCP hydrogel-based versatile sensors display a high strain sensitivity with a broad working range (gauge factor (GF) = 8.83, up to 1000%), realizing the detection of various human motions. Moreover, the prepared sensors possess superior thermosensitive capacities (1.110/°C) for the measurement of body temperature. This strategy opens horizons to designing high-performance MXene-based hydrogels for advanced sensing platforms.

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Section: Strain Sensing Properties Of the Mcp Hydrogelmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Interface interaction-mediated design of tough and conductive MXene-composited polymer hydrogel with high stretchability and low hysteresis for high-performance multiple sensing

Wang

et al. 2022

Sci. China Mater.

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“…In order to adjust the properties of hydrogels for a wide range of applications, different synthesis methods are applied. Some of these methods are agent‐based, UV and γ radiation‐based cross‐linking and freeze‐thawing [8–11] . Freeze‐thaw is one of the physical methods of hydrogel preparation that leads to the formation of cross‐linking sites by repeating freeze‐thaw cycles [12,13] .…”

Section: Introductionmentioning

confidence: 99%

“…Some of these methods are agent-based, UV and γ radiationbased cross-linking and freeze-thawing. [8][9][10][11] Freeze-thaw is one of the physical methods of hydrogel preparation that leads to the formation of cross-linking sites by repeating freeze-thaw cycles. [12,13] The freeze-thawing method invented by Peppas [14] to prepare hydrogels in 1991 is a simple, non-toxic, economical, and fast technique.…”

Section: Introductionmentioning

confidence: 99%

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

2022

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Recently, hydrogels have been introduced for wastewater treatments as eco‐friendly and efficient adsorbents. Polyvinyl alcohol (PVA)‐based hydrogel reinforced with graphene oxide (GO) can be used for methylene blue (MB) removal from water. PVA/GO hydrogels (5 wt. % PVA and 0.5–2 wt. % GO) were prepared via the freeze‐thaw method, and the effect of GO weight percentage, freezing time, and cycle numbers were investigated. Regarding the results, the composite containing 1 wt. % GO, prepared by six‐hour freezing, and five cycles of freeze‐thawing, had the highest compressive strength (1.6±0.1 MPa) among the studied samples. Furthermore, by adding aloe vera to the PVA/GO composite containing 2 wt. % GO, the removal efficiency of MB was increased from 96 % to 99 % after 72 h, although the surface area was decreased from 31.6 m2 g−1 to 3.9 m2 g−1. Adsorption investigations were also highlighted PVA/GO and PVA/GO/aloe vera hydrogel composites follow the pseudo‐second‐order kinetics and Langmuir isotherm models.

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“…[3][4][5] Various design strategies have been developed to increase the toughness of hydrogel materials. These include the use of (interpenetrating) double-polymer network structures, 6 (dynamic) multivalent ionic crosslinking units, 7,8 nanoparticle fillers 9,10 and physical (hydrophobic) interaction enhanced toughening mechanisms. [11][12][13][14][15] Recently, we developed a method to synthesize tough polymer networks and hydrogels based on the trimerization of NCOfunctionalized prepolymers.…”

Section: Introductionmentioning

confidence: 99%

Structure–property relations in semi‐crystalline combinatorial poly(urethane‐isocyanurate)‐type hydrogels

Driest

Dijkstra

Stamatialis

et al. 2022

Polymer International

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Within the fields of regenerative medicine and tissue engineering, the development of tough hydrogel biomaterials is a challenging topic that has received much attention over the past few years. Recently, a method was developed to synthesize tough combinatorial poly(urethane-isocyanurate) (PUI)-type hydrogels by the trimerization of mixtures of NCO-functionalized prepolymers. As this synthesis approach allows a large degree of freedom in terms of polymer network design with a high level of control over the polymer network structure, the resulting systems are ideally suited for studying structure-property relations in tough hydrogel systems. In this work, we aim to systematically investigate the influence of introducing a hydrophobic component into a PUI polymer network on the mechanical properties of the resulting PUI hydrogels. Additionally, the effect of (the degree of ) crystallinity of the hydrophobic network component is investigated. For this, two series of combinatorial PUI hydrogels are synthesized, based on a hydrophilic poly(ethylene glycol) prepolymer and increasing amounts of either a crystallizable hydrophobic prepolymer (poly(ε-caprolactone)) or an amorphous hydrophobic prepolymer (poly(propylene glycol)). It is shown that the toughness of amorphous PUI hydrogels is hardly influenced by the hydrophobic content, whereas the toughness of semi-crystalline PUI hydrogels strongly increases with increasing hydrophobic content. Also, the toughness of the latter hydrogels increases further with increasing degree of crystallinity of the hydrogel. Finally, it is shown that the semi-crystalline PUI hydrogels are promising materials for biomedical adhesive and coating applications, as well as for load-bearing biomedical applications within the fields of tissue engineering and regenerative medicine.

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Biomineral calcium-ion-mediated conductive hydrogels with high stretchability and self-adhesiveness for sensitive iontronic sensors

Cited by 56 publications

References 60 publications

Interface interaction-mediated design of tough and conductive MXene-composited polymer hydrogel with high stretchability and low hysteresis for high-performance multiple sensing

Interface interaction-mediated design of tough and conductive MXene-composited polymer hydrogel with high stretchability and low hysteresis for high-performance multiple sensing

An Eco‐Friendly Polyvinyl Alcohol/Graphene Oxide‐Based Hydrogel as a Methylene Blue Adsorbent

Structure–property relations in semi‐crystalline combinatorial poly(urethane‐isocyanurate)‐type hydrogels

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