Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: unknown, P. 155975 - 155975
Published: Sept. 1, 2024
Language: Английский
Polymers, Journal Year: 2024, Volume and Issue: 16(14), P. 2021 - 2021
Published: July 15, 2024
Poly(vinyl alcohol) (PVA) is a versatile synthetic polymer, used for the design of hydrogels, porous membranes and films. Its solubility in water, film- hydrogel-forming capabilities, non-toxicity, crystallinity excellent mechanical properties, chemical inertness stability towards biological fluids, superior oxygen gas barrier good printability availability (relatively low production cost) are main aspects that make PVA suitable variety applications, from biomedical pharmaceutical uses to sensing devices, packaging materials or wastewater treatment. However, pure present limited flexibility poor biocompatibility biodegradability, which restrict its use alone various applications. mixed with other polymers biomolecules (polysaccharides, proteins, peptides, amino acids etc.), as well inorganic/organic compounds, generates wide PVA’s shortcomings considerably improved, new functionalities obtained. Also, transformation brings features opens door unexpected uses. The review focused on recent advances PVA-based hydrogels.
Language: Английский
Citations
27
Industrial & Engineering Chemistry Research, Journal Year: 2024, Volume and Issue: 63(32), P. 14176 - 14189
Published: July 30, 2024
Bionic electronic skin, with its integrated biological functions, is capable of sensing and responding to external stimuli, potentially surpassing the ideal flexibility natural skin in certain aspects. Most current preparation strategies employ "bottom-up" approach, using various monomers or polymer materials construct artificial networks through physical chemical cross-linking, leading issues complexity limited performance. In this work, we adopted a "top-down" strategy, which collagen fiber network aluminum-tanned sheepskin was utilized as scaffold load itaconic acid (IA) hydroxyethyl acrylate (HEA). The subsequent situ polymerization IA HEA led formation poly(itaconic acid-co-hydroxyethyl acrylate) (P(IA-HEA)) filling among skeleton, results successful fabrication high-strength bionic based on (LIHEZ). advantage approach that it can retain structure properties give resulting LIHEZ multiple functions (e.g., electrical conductivity, adhesion, bacteriostasis, biocompatibility, environmental stability), thereby replicating even performance animal skin. demonstrated sensitive stimulus responsiveness durability could serve multimodal sensors (strain, temperature, humidity, bioelectricity) efficiently monitor human movements, physiological signals, changes temperature humidity. This diversified data collection provides reliable assurance for monitoring health. present construction method substrate not only breaks conventional single applications but also new insights selection flexible device substrates, promising be next-generation material constructing intelligent
Language: Английский
Citations
20
International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 278, P. 134374 - 134374
Published: Aug. 3, 2024
The consumption of animal products has witnessed a significant increase over the years, leading to growing need for industries adopt strict waste control measures mitigate environmental impacts. disposal in landfill can result diverse and potentially hazardous decomposition by-products. Animal by-products, derived from meat, poultry, seafood fish industries, offer substantial raw material source collagen gelatin production due their high protein content. Collagen, being major component tissues, represents an abundant resource that finds application various chemical industries. demand collagen-based continues grow, yet availability primary remains limited insufficient meet projected needs. Consequently, repurposing materials contain provides opportunity this while at same time minimizing amount is dumped. This review examines potential extract value content present animal-derived It systematic evaluation different species groups discusses approaches processing fabricating repurposed collagen. specifically focuses on research, encompassing examination its physical properties, as well modifications. We have detailed how research knowledge built structure function will drive new initiatives lead development opportunities future. Additionally, it highlights emerging extracting high-quality efforts fabricate original within chemical, biomedical science-based
Language: Английский
Citations
8
ACS Applied Electronic Materials, Journal Year: 2024, Volume and Issue: 6(5), P. 3216 - 3226
Published: April 23, 2024
Herein, a poly(N-isopropylacrylamide)-based conductive composite hydrogel system coenhanced by clay and polydopamine-modified MXene was synthesized to achieve strain temperature sensibility simultaneously. The noncovalently cross-linked network via MXene, clay, polymer chains endowed the with excellent mechanical properties (tensile strength at break of 117 kPa elongation 1723%). This also exhibits strong adhesion good electrical conductivity (0.13 S/m). Regarding sensing properties, its sensitivity is 2.749 °C–1, while detection limit as low 0.05%. Based on unique characteristics prepared hydrogel, as-assembled sensor can detect stress simultaneously, exhibiting great application potential in human physiological monitoring.
Language: Английский
Citations
5
Macromolecular Rapid Communications, Journal Year: 2025, Volume and Issue: unknown
Published: March 3, 2025
Abstract In order to improve the disadvantages of traditional hydrogels such as low mechanical strength and lack responsiveness, different types nanoparticles or nanostructures are added into hydrogel network through in situ polymerization, self‐assembly techniques, other strategies, giving a variety special properties, stimulation sensitivity, optical electrical reversibility. With development nano materials synthesis technology, nanocomposite have shown great potential drug delivery, tissue engineering, motion detection, wastewater treatment, been extensively studied recent years. This review comprehensively elucidates state‐of‐the‐art preparation strategies underlying response mechanisms diverse stimulus‐responsive hydrogels, spanning temperature, pH, humidity, electrical, light responses. It systematically dissects their applications biomedicine, environmental remediation, flexible sensing, composite phase change materials. Moreover, it delves future prospects challenges, emphasizing need for continuous innovation unlock full emerging fields address existing limitations.
Language: Английский
Citations
0
Journal of Materials Chemistry C, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 1, 2025
A mixture of PVA, CS and ILs was prepared into an ionic gel by freeze–thaw cycles as the dielectric layer for a capacitive sensor, which had high sensitivity rapid response time.
Language: Английский
Citations
0
Polymer science & technology., Journal Year: 2024, Volume and Issue: unknown
Published: Dec. 12, 2024
Conductive hydrogels have garnered significant attention in the realm of future flexible electronic devices due to their properties such as flexibility, electrical conductivity, frost resistance, and biocompatibility. However, integration numerous functional applications biomedical field still presents notable challenges. In this research, a rigid hard-structured network was formed by cross-linking gallic acid grafted chitosan (CS–GA) tannic (TA) with poly(vinyl alcohol) (PVA) through physical freezing. The noncovalent hydrogen bonding during freezing thawing process facilitated formation microcrystalline domains amorphous hydrogel system. Functional proteins from eggshell membrane were cross-linked tetra-armed poly(ethylene glycol) maleimide (4am-PEG-MAL) via thiol-olefin click chemistry, lysozyme incorporated into an antibacterial component nucleophilic substitution reaction. These chemical methods resulted soft-structured that enhanced mechanical (maximum stress 2.15 MPa elongation 605%). use ionic liquids/ethylene glycol/water (ILs/EG/H2O) ternary solvents instead single solvent not only provided resistance but also imparted excellent conductivity (0.37 ± 0.04 S/m). Notably, organohydrogel showed good antimicrobial biocompatibility effective providing emergency cooling after fireworks burns promoting wet healing broken skin minimize scarring. field, multifunctional can serve wearable device monitor movement amplitude wounds real-time, offering novel approach deep learning-assisted wound healing. nature biological promising applications.
Language: Английский
Citations
3
Journal of Macromolecular Science Part A, Journal Year: 2024, Volume and Issue: 61(9), P. 592 - 601
Published: June 18, 2024
Hydrogels have attracted extensive attention for their promising applications as flexible sensors. Developing conductive hydrogels with excellent mechanical properties still remains a significant challenge. Herein, double-network (DN) composed of poly(vinyl alcohol) (PVA) and poly(ionic liquids) (PILs) are prepared through repetitive freezing/thawing process. The further treated Fe3+ ions to enhance the due complexation between carboxyl groups ions. influence amount PILs concentration on conductivity is investigated. optimal DN hydrogel P(VMCA-AA)1/PVA-Fe3+4 shows properties, whose tensile strength, elongation at break, toughness 2.2 MPa, 350%, 3.5 MJ m−3, respectively. also displays good 1.04 S m−1. Moreover, demonstrates high sensing sensitivity gauge factor (GF) 3.36, indicating its application potential sensor.
Language: Английский
Citations
2
ACS Omega, Journal Year: 2024, Volume and Issue: 9(42), P. 43175 - 43183
Published: Oct. 8, 2024
The purpose of this paper is to develop a self-detecting diaphragm integrated with flexible sensor, which utilized in an underwater thruster. Resistive strain sensors are easy manufacture and integrate due their advantages reliable stretchability ductility. Inspired by the structure neurons, we fabricated resistive using silica gel as matrix carbon black nanotubes additives. All demonstrated positive resistance characteristics under 60% conditions, sensor containing mass ratio 9 wt % exhibiting best resistance-strain linearity. To verify anti-interference capability substrates varying hardness values changing environmental pressure, tested pressure sensitivity altering gel. results indicate that highest value provides interference. detect motion deformation internal functional components thruster, combined detection movement operation function diaphragm, resulting new capabilities. was evaluated tensile testing machine LCR tester. demonstrate mechanical properties stable, sensitive response during operation. This research can also be applied amplitudes other types soft robots.
Language: Английский
Citations
1
ACS Applied Polymer Materials, Journal Year: 2024, Volume and Issue: 6(22), P. 13957 - 13968
Published: Nov. 11, 2024
With the advancements in technology, there is an increasing demand for enhanced flexibility and convenience flexible wearable sensors. A composite nanohydrogel sensor with excellent mechanical properties, high sensitivity, stability, real-time monitoring was prepared this work. The hydrogel made up of polyacrylamide, poly(vinyl alcohol), V2C nanosheets. integration conductive nanosheets substantially enhances sensor's conductivity sensitivity. At same tensile strain, increased by 80% addition material. achieves a maximum elongation 1300% maintains linearity sensitivity (2.46), even under strain 500%, ensuring broad operational range sensor. In addition, exhibits good repeatability (10 000 cycles) impressive response/recovery times, recording 0.588 0.814 s tension 0.744 0.852 compression, respectively, detection capabilities. Due to outstanding performance, it into piano training, physical exercises, facial expressions, gesture recognition, among others. Finally, through analysis training data sets Transformer algorithm design, device can tailor optimal plans trainees, thereby enhancing effectiveness. summary, holds significant promise augmenting educational personalized rehabilitation, etc., positively impacting modern education, sports, healthcare.
Language: Английский
Citations
1