Tough, adhesive and conductive polysaccharide hydrogels mediated by ferric solution

Xu, Jiajun; Jin, Rining; Duan, Lijie; Ren, Xiuyan; Gao, Guanghui

doi:10.1016/j.carbpol.2019.01.091

Cited by 82 publications

(30 citation statements)

References 41 publications

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“…The PAAm-collagen hydrogel could be assembled as a thin layer of on-skin sensor considering the skin-similar mechanical properties. Furthermore, the PAAm-collagen hydrogel demonstated excellent self-adhesion and moderate mechanical properties compared with orther hydrogels in Table S2 [15,[31][32][33][34][35].…”

Section: Resultsmentioning

confidence: 99%

An environment-stable hydrogel with skin-matchable performance for human-machine interface

et al. 2021

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Ionic hydrogel-based sensors have shined a spotlight on wearable electronics. However, the sensitivity and reliability of hydrogel devices are significantly hampered by the weak adhesion of skin-sensor interface as well as inferior temperature tolerance. Here, inspired by the structure and composition of dermis, a novel skin-attachable and environment-stable hydrogel was designed by integrating collagen into the LiCl-containing chemically cross-linked polyacrylamide hydrogel. The hydrogel exhibited skin-like mechanical properties of low modulus, superior stretchability as well as excellent elasticity. Furthermore, the introduction of collagen endowed the hydrogel with robust and seamless interfaces with diverse materials, including the curved skin. As a result, the hydrogel is capable of serving as a human-machine interface for collecting reliable electrocardiography (ECG) signals and discerning various human motions, with high sensitivity (gauge factor = 10.7), fast response, negligible hysteresis as well as extensive monitoring range. Notably, the hydrogel that can mimick the temperature-tolerant mechanism of most organisms possesses persistent stabilization of adhesive, conductive, sensory and mechanical performances at subzero or ambient conditions. The skin-inspired strategy paves an effective way for the design of multifunctional materials with potential applications in next-generation electronics.

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Section: Resultsmentioning

confidence: 99%

An environment-stable hydrogel with skin-matchable performance for human-machine interface

et al. 2021

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“…When the hydrogel was completely healed, the surface resistivity was minimal as shown in Figure 7C. Meanwhile, LED indicators are used to visualize the self‐healing behavior of PCT hydrogels 70 . Certainly, when using the hydrogel as a conductor in a circuit, the LEDs are very bright.…”

Section: Resultsmentioning

confidence: 99%

Ti₃C₂Tx MXenes reinforced PAA/CS hydrogels with self‐healing function as flexible supercapacitor electrodes

Lei

Zhou

et al. 2021

Polymers for Advanced Techs

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Lightweight, thin, and stretchable flexible microelectronic devices have become a new challenge for researchers. To provide power for these conformable devices, it is necessary to design the energy storage device into a flexible and stretchable structure. In this paper, a two‐step method was used to prepare a dual‐physical cross‐linked polyacrylic acid/chitosan/Ti3C2Tx(PCT) conductive hydrogel flexible electrode. The three‐dimensional (3D) porous structure not only offers a good electrical connection, but also saves the use of binder and additional current collector, which helps to enhance the electrochemical properties of electrode. The unique two‐dimensional layered structure of Ti3C2Tx enables the hydrogel electrode to withstand considerable pressure deformation without breaking, and has excellent tensile properties. The flexible electrode exhibited an excellent tensile strength of 0.083 MPa if only introduced 0.31 wt% of Ti3C2Tx with the tensile strain of 158.63% and owned remarkable self‐healing properties after injury. Thereby, the hydrogel electrode renders a maximum capacitance of 291.8 mF g−1 at 0.5 mA/g and a good cycling stability with 64.24% capacitance retention after 2000 charge–discharge cycles. This provides a research and development strategy for binder‐free, non‐toxic, and mini‐size flexible energy storage devices.

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“…Moreover, DMBA has better solubility in different solvents and is regarded as a new generation of green environmental hydrophilic chain extender, which has been widely used in the manufacture of waterborne polyurethanes. Particularly, the carboxylate of DMBA is able to coordinate with metal cations in monodentate, bidentate, or polydentate bindings and various bridging modes [ 29 , 30 ]. Besides, we are concerned with that in the preparation of polymers containing metal-coordination, researchers [ 22 , 23 , 24 , 25 ] generally synthesize polymers with coordination structures first, and then dissolve them in organic solvents or water and further coordinate with metal compounds, which is complex and inconvenient in industrial productions and applications.…”

Section: Introductionmentioning

confidence: 99%

Construction of Mechanically Reinforced Thermoplastic Polyurethane from Carbon Dioxide-Based Poly(ether carbonate) Polyols via Coordination Cross-Linking

Dong

Duan

et al. 2021

Polymers

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Using carbon dioxide-based poly(propylene ether carbonate) diol (PPCD), isophorone diisocyanate (IPDI), dimethylolbutyric acid (DMBA), ferric chloride (FeCl3), and ethylene glycol (EG) as the main raw materials, a novel thermoplastic polyurethane (TPU) is prepared through coordination of FeCl3 and DMBA to obtain TPU containing coordination enhancement directly. The Fourier transform infrared spectroscopy, 1H NMR, gel permeation chromatography, UV−Vis spectroscopy, tensile testing, dynamic mechanical analysis, X-ray diffraction, differential scanning calorimetry, and thermogravimetric analysis were explored to characterize chemical structures and mechanical properties of as-prepared TPU. With the increasing addition of FeCl3, the tensile strength and modulus of TPU increase. Although the elongation at break decreases, it still maintains a high level. Dynamic mechanical analysis shows that the glass-transition temperature moves to a high temperature gradually along with the increasing addition of FeCl3. X-ray diffraction results indicate that TPUs reinforced with FeCl3 or not are amorphous polymers. That FeCl3 coordinates with DMBA first is an effective strategy of getting TPU, which is effective and convenient in the industry without the separation of intermediate products. This work confirms that such Lewis acids as FeCl3 can improve and adjust the properties of TPU contenting coordination structures with an in-situ reaction in a low addition amount, which expands their applications in industry and engineering areas.

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Tough, adhesive and conductive polysaccharide hydrogels mediated by ferric solution

Cited by 82 publications

References 41 publications

An environment-stable hydrogel with skin-matchable performance for human-machine interface

An environment-stable hydrogel with skin-matchable performance for human-machine interface

Ti₃C₂Tx MXenes reinforced PAA/CS hydrogels with self‐healing function as flexible supercapacitor electrodes

Construction of Mechanically Reinforced Thermoplastic Polyurethane from Carbon Dioxide-Based Poly(ether carbonate) Polyols via Coordination Cross-Linking

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Tough, adhesive and conductive polysaccharide hydrogels mediated by ferric solution

Cited by 82 publications

References 41 publications

An environment-stable hydrogel with skin-matchable performance for human-machine interface

An environment-stable hydrogel with skin-matchable performance for human-machine interface

Ti3C2Tx MXenes reinforced PAA/CS hydrogels with self‐healing function as flexible supercapacitor electrodes

Construction of Mechanically Reinforced Thermoplastic Polyurethane from Carbon Dioxide-Based Poly(ether carbonate) Polyols via Coordination Cross-Linking

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Ti₃C₂Tx MXenes reinforced PAA/CS hydrogels with self‐healing function as flexible supercapacitor electrodes