Hydrogel Based on Polyhydroxyalkanoate Sulfonate: Control of the Swelling Rate by the Ionic Group Content

Brelle, Laura; Faÿ, Fabienne; Ozturk, Teoman; Didier, Nathalie; Renard, Estelle; Langlois, Valérie

doi:10.1021/acs.biomac.3c00059

Cited by 6 publications

(2 citation statements)

References 34 publications

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“…This effect could be explained by the decrease in the hydrophilicity of the network, driven by the inclusion of short hydroxyethyl pendant groups (HEA) instead of long polyethylene glycol chains (PEG700). [ 42 ] Figure S2 (Supporting Information) shows the compressive stress‐strain curves of PEDOT:PSS/20% HEA‐co‐PEGDA. The Young's modulus of the copolymer is 13.4 ± 0.2 MPa which is lower than the homopolymer PEDOT:PSS/PEGDA (35.4 ± 1.4 MPa) elsewhere reported.…”

Section: Resultsmentioning

confidence: 99%

Light‐Based 3D Multi‐Material Printing of Micro‐Structured Bio‐Shaped, Conducting and Dry Adhesive Electrodes for Bioelectronics

Dominguez‐Alfaro,

Mitoudi‐Vagourdi,

Dimov

et al. 2024

Advanced Science

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In this work, a new method of multi‐material printing in one‐go using a commercially available 3D printer is presented. The approach is simple and versatile, allowing the manufacturing of multi‐material layered or multi‐material printing in the same layer. To the best of the knowledge, it is the first time that 3D printed Poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) micro‐patterns combining different materials are reported, overcoming mechanical stability issues. Moreover, the conducting ink is engineered to obtain stable in‐time materials while retaining sub‐100 µm resolution. Micro‐structured bio‐shaped protuberances are designed and 3D printed as electrodes for electrophysiology. Moreover, these microstructures are combined with polymerizable deep eutectic solvents (polyDES) as functional additives, gaining adhesion and ionic conductivity. As a result of the novel electrodes, low skin impedance values showed suitable performance for electromyography recording on the forearm. Finally, this concluded that the use of polyDES conferred stability over time, allowing the usability of the electrode 90 days after fabrication without losing its performance. All in all, this demonstrated a very easy‐to‐make procedure that allows printing PEDOT:PSS on soft, hard, and/or flexible functional substrates, opening up a new paradigm in the manufacturing of conducting multi‐functional materials for the field of bioelectronics and wearables.

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Section: Resultsmentioning

confidence: 99%

Light‐Based 3D Multi‐Material Printing of Micro‐Structured Bio‐Shaped, Conducting and Dry Adhesive Electrodes for Bioelectronics

Dominguez‐Alfaro,

Mitoudi‐Vagourdi,

Dimov

et al. 2024

Advanced Science

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“…However, studies on the use of PHAs for the preparation of nonadhesive marine coatings are sparse and only one recent study has evaluated the potential of these biopolymers as a matrix for fouling release coatings [62]. Nevertheless, PHAs have been used to evaluate the factors controlling bacterial attachment and/or biofilm formation in polymeric surfaces [63][64][65][66].…”

Section: Advantages and Applications Of Phasmentioning

confidence: 99%

Biobased Anti-Adhesive Marine Coatings from Polyhydroxyalkanoates and Polysaccharides

et al. 2023

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Due to environmental regulations, antifouling marine coatings must be gradually replaced by biocide-free coatings. Marine organisms weakly adhere to fouling release coatings, presenting a low surface free energy and a high elasticity, so they can be readily removed by the sheer force of water. Currently, these materials are mainly composed of petrochemical polymers, such as silicone or fluoropolymers, with hydrophilic polymers as additives. However, following the ever-increasing environmental concerns, the research on new, alternative, eco-friendly coatings is oriented towards the use of biobased polymers from renewable resources. Two main families have been studied: polyhydroxyalkanoates (PHAs) and polysaccharides. PHAs are produced by bacteria in stressful conditions, while polysaccharides are extracted from plants, animals, or micro-organisms such as bacteria, in which case they are called exopolysaccharides (EPS). Since the use of these polymers is a non-toxic approach to controlling fouling colonization, this review provides an overview of these biobased polymers for their applications in new anti-adhesive marine coatings.

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Cytocompatible Hydrogels with Tunable Mechanical Strength and Adjustable Swelling Properties through Photo-Cross-Linking of Poly(vinylphosphonates)

Maier,

Mansi,

Halama

et al. 2024

ACS Appl. Mater. Interfaces

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Herein, the synthesis, characterization, and application of a novel synthetic hydrogel based on the photoinitiated cross-linking of poly(vinylphosphonates) is presented. First, statistical copolymers with adjustable ratios of the monomers diallyl vinylphosphonate (DAlVP) and diethyl vinylphosphonate (DEVP), as well as different molecular weights, were obtained via rare earth metal-mediated group-transfer polymerization (REM-GTP) while maintaining narrow polydispersities. The copolymers were cross-linked by applying photoinitiated thiol−ene click chemistry (λ = 365 nm). The network formation was monitored via oscillatory rheology coupled with UV-irradiation, revealing the high spatiotemporal control of the reaction. Moreover, the equilibrium storage moduli of poly(vinylphosphonate)-based hydrogels increased with a growing number of DAlVP units and upon application of a different cross-linker, which was additionally confirmed by nanoindentation experiments. In contrast, the water uptake of hydrogels decreased with higher DAlVP amounts in the corresponding hydrogels due to lower chain mobility and an overall increase in the hydrophobicity of the samples. Upon successful functionalization of P(DEVP-stat-DAlVP) copolymers with sodium 3-mercaptopropane-1-sulfonate, as indicated via 1 H DOSY NMR, the respective cross-linked materials displayed a remarkable increase in the water uptake; thus, presenting highly hydrophilic gels with an apparent interplay between water uptake, cross-linking density, and functionalization degree. Finally, the purified hydrogels showed cytocompatibility and enabled cell adhesion of human umbilical artery smooth muscle cells (HUASMCs) after direct seeding. The materials further allowed the adhesion and growth of an endothelial layer, triggered no pro-inflammatory response as evidenced by cytokine release of M0 macrophages, and exhibited antibacterial properties toward S. aureus and E. coli.

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Hydrogel Based on Polyhydroxyalkanoate Sulfonate: Control of the Swelling Rate by the Ionic Group Content

Cited by 6 publications

References 34 publications

Light‐Based 3D Multi‐Material Printing of Micro‐Structured Bio‐Shaped, Conducting and Dry Adhesive Electrodes for Bioelectronics

Light‐Based 3D Multi‐Material Printing of Micro‐Structured Bio‐Shaped, Conducting and Dry Adhesive Electrodes for Bioelectronics

Biobased Anti-Adhesive Marine Coatings from Polyhydroxyalkanoates and Polysaccharides

Cytocompatible Hydrogels with Tunable Mechanical Strength and Adjustable Swelling Properties through Photo-Cross-Linking of Poly(vinylphosphonates)

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