A conductive, antibacterial, and antifouling hydrogel based on zwitterion

Abstract

This paper proposes a cationic double-network hydrogel, which has good electrical conductivity, antibacterial properties, antiprotein adsorption, and mechanical properties. The cationic polymer formed a conductive path in the hydrogel network, so that the gel had good conductivity. With the increase of carboxybetaine ester, the conductivity gradually increases. As a sensor, hydrogel could respond quickly to strains such as stretching and bending. In addition, the hydrogel showed excellent antibacterial properties against Escherichia coli, the antibacterial rate can reach up to 99%. After hydrolysis, the hydrogel showed stable antiprotein adsorption performance. The tensile strength of the gel could reach 1.05 MPa, and the elongation at break was 474.31%. Therefore, this gel may be used for dressing and electronic skin. And the morphology of the hydrogel was characterized by FT-IR, X-ray diffraction, and SEM.

Highly Transparent, Self-Healing, and Self-Adhesive Double Network Hydrogel for Wearable Sensors

“…It has a unique porous structure and can provide an effective channel for ion transport (Zhao X. et al, 2019), so it has high ionic conductivity. At the same time, they have high flexibility, transparency, and good biocompatibility (Luo et al, 2021;Ding et al, 2022). Although highly tensile and self-healing ionic hydrogels are usually reported, most synthetic ionic hydrogels exhibit strain-softening properties (Peng et al, 2022;Zhou et al, 2022).…”

Construction of antifouling and antibacterial polyhexamethylguanidine/chondroitin sulfate coating on polyurethane surface based on polydopamine rapid deposition

“…Subsequently, the proliferation of bacteria on the bio‐film leads to bacteria infection and decreases the performance of the implants, even resulting in implantation failure 2 . Hence, the infection and rejection reaction attributed to the formation of bio‐film and bio‐fouling on the implanted medical device are the mainly faced problems after surgical implant surgery 3,4 …”

“…2 Hence, the infection and rejection reaction attributed to the formation of bio-film and bio-fouling on the implanted medical device are the mainly faced problems after surgical implant surgery. 3,4 With the aim to slower the bio-film formation on the biomaterial surface, many researchers dedicate to develop various method to endow material with antifouling property. Yuan used surface-initiated atom transfer radical polymerization (SI-ATRP) to modify PU to reduce 85.6% BFG adsorption, 93.4% BSA adsorption, and 68.3% LYS adsorption.…”

Stretchable, conductive poly(acrylamide‐co‐maleic acid)/triethylene glycol/NaCl double‐crosslinked organohydrogel with excellent antifreezing and sensing properties

“…However, hydrogel contained plenty of water, which can be easily frozen at the temperature below 0°C resulting to the loss of flexibility and sharply decline of conductivity largely limited the applications in low temperature 20–23 . To solve the aforementioned problem, organic solvents or inorganic salts were introduced to the networks to endow the hydrogel with the extraordinary freezing resistance 24–29 . On the other hand, the excellent mechanical properties, especially stretchability, are highly importantto flexible electrical devices.…”

“…[20][21][22][23] To solve the aforementioned problem, organic solvents or inorganic salts were introduced to the networks to endow the hydrogel with the extraordinary freezing resistance. [24][25][26][27][28][29] On the other hand, the excellent mechanical properties, especially stretchability, are highly importantto flexible electrical devices. For example, Pan et al prepared the antifreezing double-network hydrogel through simply immersing the polyvinyl alcohol-polyacrylamide hydrogel containing ZnSO 4 in a mixed solvent of ethylene glycol and water.…”