Tri-cationic copolymer hydrogels with adjustable adhesion and antibacterial properties for flexible wearable sensors

Sun, Xiangbin; Liu, Xiaoqing; Huang, Peng; Wang, Zeyuan; He, Yonghong; Song, Peng; Wang, Rongming

doi:10.1039/d3tc00746d

Cited by 5 publications

(1 citation statement)

References 39 publications

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“…The internal resistance of SAPC-3 only fluctuates from 2.935 to 2.83 Ω in the EIS plots of SAPC-3 at different temperatures, indicating that the ionic conductivity of SAPC-3 is well maintained at À80 C, and that it has a wide temperature range of applicability. Superior frost resistance to hydrogel electrolytes reported at this stage 29,33,51,52 (Figure 4h).…”

Section: Resultsmentioning

confidence: 77%

High toughness antifreeze conductive double network zwitterionic gel electrolyte for flexible supercapacitors

Wang,

Zhang,

et al. 2024

J of Applied Polymer Sci

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Flexible wearable supercapacitors based on hydrogel electrolyte are considered as flexible energy storage device with great potential. However, polymer gel electrolytes contain a large number of water molecules, which can easily freeze at sub‐zero temperatures, thus severely inhibiting ion transport. The ionic conductivity, cyclic stability and mechanical properties of gel electrolytes decrease at low temperatures (below −25°C), which seriously hinders the application of flexible wearable supercapacitors. In order to improve the mechanical properties and ensure the excellent ionic conductivity of the electrolyte, a freezing‐resistant gel electrolyte constructed by supramolecular self‐assembly, which has a wide temperature range from 25 to −80°C, stable ionic conductivity and ultra‐high mechanical strength. Low‐temperature‐resistant gel electrolytes, called flexible supercapacitor‐SBMA‐co‐PVA‐AA/CaCl2 (FSAPC), have been designed and prepared by molecular‐scale supramolecular self‐assembly of rigid [2‐(methacryloyloxy)ethyl]dimethyl(3‐sulfopropyl) polymer chains and flexible poly(vinyl alcohol) polymer chains, and the test results showed that the gel electrolyte ‐SBMA‐co‐PVA‐AA/CaCl2 (PSAPC) has excellent conductivity of 34.07 mS cm−1 at 25°C, the flexible supercapacitor has a specific capacity of 8.57 Wh kg−1, and the capacity retention rate is 91.2% even after 5000 cycles at −25°C, excellent conductivity at −25°C for 31.88 mS cm−1 and at −80°C for 35.34 mS cm−1. The potential applications of the amphiphilic ionic gel electrolyte in the industrial development of low‐temperature resistant supercapacitors are noteworthy.

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Section: Resultsmentioning

confidence: 77%

High toughness antifreeze conductive double network zwitterionic gel electrolyte for flexible supercapacitors

Wang,

Zhang,

et al. 2024

J of Applied Polymer Sci

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Synthesis and characterization of cellulose derivatives for enhanced antimicrobial activity

Echeverría,

Arnaldos-Pérez,

Barranco

et al. 2024

Cellulose

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The need for biodegradable materials has driven the exploration of natural and biobased polymers, with cellulose emerging as a promising option due to its abundance and environmental sustainability. However, cellulose lacks inherent antimicrobial activity, prompting researchers to explore various strategies. In this work, the permanent covalent chemical modification of microcrystalline cellulose with 1-methylimidazole is reported to provide cellulose with antimicrobial properties. The modifications were confirmed using solid-state 13C-NMR and Fourier Transform Infrared (FT-IR) spectroscopies. The analysis from 13C-NMR and elemental analysis also confirmed the successful of the chemical modification occurred at C6 after chlorination with an estimated degree of substitution of 17%. The surface charge density of this cellulosic derivative was determined using ζ potential measurements, which confirmed its cationization. The crystalline and thermal properties of the resulting cellulose derivative were evaluated using X-ray diffraction and thermogravimetric analysis (TGA), respectively. Finally, the antimicrobial activity of the obtained cationic cellulose was assessed against both Gram-positive (Staphylococcus epidermidis) and Gram-negative (Pseudomona aeruginosa) bacteria, giving a reduction of > 99.99% and 99.6%, respectively.

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Anti-freezing conductive zwitterionic composite hydrogels for stable multifunctional sensors

Zhang,

Raffa

2023

European Polymer Journal

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Tri-cationic copolymer hydrogels with adjustable adhesion and antibacterial properties for flexible wearable sensors

Abstract: Conductive hydrogels are widely used in the field of wearable sensors and artificial intelligence due to their excellent properties. However, most reported conductive hydrogels are not capable of adjustable adhesion...

Cited by 5 publications

References 39 publications

High toughness antifreeze conductive double network zwitterionic gel electrolyte for flexible supercapacitors

High toughness antifreeze conductive double network zwitterionic gel electrolyte for flexible supercapacitors

Synthesis and characterization of cellulose derivatives for enhanced antimicrobial activity

Anti-freezing conductive zwitterionic composite hydrogels for stable multifunctional sensors

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