Polymer Testing, Год журнала: 2025, Номер unknown, С. 108781 - 108781
Опубликована: Март 1, 2025
Язык: Английский
Advanced Functional Materials, Год журнала: 2024, Номер 34(38)
Опубликована: Май 3, 2024
Abstract Real‐time monitoring of respiration plays a very important role in human health assessment, especially and analyzing during exercise sleep. However, traditional humidity sensors still have problems flexibility, sensitivity, durability, so there is an urgent need to develop with high stretchability, environmental resistance as respiratory applications. Here, based on the double network hydrogel structure polyvinyl alcohol polyacrylamide, highly sensitive, stretchable, environmentally stable organic sensor has been manufactured by using synergistic effect lithium chloride MXene. The shows rapid response range 40–85% RH, sensitivity −103.4%/% RH. In addition, it exhibits more than 3000% mechanical strain excellent resistance, which attributed chemical cross‐linking multiple hydroxyl groups glycerol forming rich hydrogen bonds water polymer chains. used for real‐time breathing sleep processes. This work provides new strategy preparing high‐performance, extensibility, stability hydrogel‐based monitoring.
Язык: Английский
Процитировано
50
Advanced Functional Materials, Год журнала: 2024, Номер 34(40)
Опубликована: Апрель 15, 2024
Abstract Fiber‐based multimodal sensors with electrical/optical signals are highly desired for next‐generation wearable electronics. Despite the remarkable progress in this area, achieving large‐scale knittable, washable, and self‐healing performance fiber‐based simultaneously remains a great challenge. Here, smart fiber capable of exhibiting piezoresistive/luminescent properties based on an H‐bonding connected multilayered core–shell nanostructure is developed. The core principle design involves constructing strong interfacial interactions between layers, which results sensor high sensitivity (gauge factor = 12383500), exceptional water resistance, robust (tensile strength 30.9 MPa, healing efficiency 72.9%). Unlike traditional where elaborate nanostructures prone to shedding during knitting, strategy enables excellent knittability be patterned fabric, improving both optical electrical sensitivities. This work anticipated make significant contribution further development electronic products visual human–computer interaction devices.
Язык: Английский
Процитировано
23
ACS Applied Polymer Materials, Год журнала: 2024, Номер 6(7), С. 4233 - 4243
Опубликована: Март 22, 2024
Conductive hydrogels are considered highly promising materials for developing skin-like sensors due to their excellent biocompatibility and mechanical flexibility. However, limited stretchability, low toughness, fatigue resistance hinder sensing capabilities durability. To overcome these limitations, we developed a conductive hydrogel composite with high performance the ability respond identify different languages. The prepared by incorporating functionalized multiwalled carbon tubes (F-CNTs) into hydrophobically associated polyacrylamide (AM) lauryl methacrylate (Lmc) hydrogels. ensure uniform dispersion of F-CNTs in network, cationic surfactant cetyldimethylethylammonium bromide (CDAB) is used; carboxylic group on cross-links micelles polymer chains through electrostatic interactions. also facilitates formation hydrophobic interactions between matrix F-CNT surface. This greatly improves properties hydrogel, resulting stretchability 2016%, toughness 551.56 kJ m–3, an antifatigue property. exhibits tensile strain sensitivity gauge factor 4.69 at 600% strain. hybrid hydrogel-based demonstrate capabilities, not only detecting full-range human activities but differentiating languages (English, Urdu, Pushto) both speaking writing. Besides sensing, has capability mimic skin touchable screen like metal. These results highlight potential F-CNT-based as wearable sensor flexible devices.
Язык: Английский
Процитировано
21
ACS Applied Materials & Interfaces, Год журнала: 2024, Номер 16(35), С. 46771 - 46788
Опубликована: Авг. 21, 2024
Electronic skin (e-skin) is considered as a highly promising interface for human-computer interaction systems and wearable electronic devices. Through elaborate design assembly of various materials, it possesses multiple characteristics similar to human skin, including remarkable flexibility, stretchability, sensitivity temperature humidity, biocompatibility, efficient interfacial ion/electron transport capabilities. Here, we innovatively integrate multifunctional carbon quantum dots (CQDs), which exhibit conductivity, antibacterial properties, ultraviolet absorption, fluorescence emission, with poly(acrylic acid) glycerin (Gly) into three-dimensional network structure natural goatskin collagen fibers. top-down strategy enhanced by hydrogen bond reconstruction, successfully fabricated novel transparent e-skin (PAC-eSkin). This exhibited significant tensile properties (4.94 MPa strength 263.42% maximum breaking elongation), while also possessing Young's modulus (2.32 MPa). It noteworthy that the functionalized CQDs used was derived from discarded goat hair, addition Gly gave PAC-eSkin excellent antifreezing moisturizing properties. Due presence ultrasmall CQDs, creates channels within PAC-eSkin, could rapidly sense motion physiological signals (with gauge factor (GF) 1.88). Furthermore, had potential replace traditional electrode patches real-time monitoring electrocardiogram, electromyogram, electrooculogram signals, higher SNR (signal-to-noise ratio) 25.1 dB. Additionally, customizable size shape offer vast possibilities construction single-electrode triboelectric nanogenerator systems. We have reason believe development this based on CQDs-functionalized dermal matrices can pave new way innovations in human–computer interfaces their sensing application diverse scenarios.
Язык: Английский
Процитировано
20
Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154445 - 154445
Опубликована: Авг. 3, 2024
Язык: Английский
Процитировано
16
SusMat, Год журнала: 2024, Номер unknown
Опубликована: Ноя. 27, 2024
ABSTRACT Flexible sensors exhibit the properties of excellent shape adaptability and deformation ability, which have been applied for environmental monitoring, medical diagnostics, food safety, smart systems, human–computer interaction. Cellulose‐based hydrogels are ideal materials fabrication flexible due to their unique three‐dimensional structure, renewability, ease processing, biodegradability, modifiability, good mechanical properties. This paper comprehensively reviews recent advances cellulose‐based in construction sensor applications. The characteristics, mechanisms, advantages prepared by physical cross‐linking, chemical cross‐linking respectively analyzed summarized detail. focus then turns research development hydrogel sensors, including sensing (pressure/strain, humidity/temperature, optical sensing), (chromium, copper, mercury ion sensing, toxic gas nitrite biosensing (glucose, antibody, cellular sensing). Additionally, limitations along with key challenges future directions, discussed. It is anticipated that this review will furnish invaluable insight advancement novel green, facilitate integration as a fundamental component multifunctional technologies, thereby expediting design innovative near future.
Язык: Английский
Процитировано
15
Advanced Materials Technologies, Год журнала: 2024, Номер 9(9)
Опубликована: Март 11, 2024
Abstract Conductive hydrogel is considered a promising wearable sensor material. Developing flexible conductive sensors with stretchability, adhesion, and stability remains challenging. In this study, transparent, self‐adhesive, antifreeze, anti‐UV, stretchable, conductive, reusable polyacrylamide/glycerol/gelatin/tannic acid/Fe 3+ (PGGT‐Fe ) structure successfully constructed through simple one‐pot polymerization method. The PGGT‐Fe composed of dual networks polyacrylamide gelatin for organic cross‐linking, using water/glycerol as the dispersion medium, incorporates viscous substance: tannic acid, metal ions (Fe ). Due to introduction abundant amino, carboxylic hydroxyl functional groups on exhibits excellent repeatable adhesion capabilities various surfaces (including glass, metal, plastic, pigskin) maximum strength 98 kPa when attached pigskin. Furthermore, based stable network high conductivity, not only strain sensitivity, fast response, but also can stably collect epidermal bio signals. conclusion, work provides new approach design development next‐generation multifunctional hydrogels opens up vast possibilities their applications in electronics field.
Язык: Английский
Процитировано
10
Sensors, Год журнала: 2024, Номер 24(5), С. 1445 - 1445
Опубликована: Фев. 23, 2024
This study investigates the biomechanical impact of a passive Arm-Support Exoskeleton (ASE) on workers in wool textile processing. Eight workers, equipped with surface electrodes for electromyography (EMG) recording, performed three industrial tasks, and without exoskeleton. All tasks were an upright stance involving repetitive upper limbs actions overhead work, each presenting different physical demands terms cycle duration, load handling percentage time shoulder flexion over 80°. The use ASE consistently lowered muscle activity anterior medial deltoid compared to free condition (reduction signal Root Mean Square (RMS) −21.6% −13.6%, respectively), while no difference was found Erector Spinae Longissimus (ESL) muscle. reported complete satisfaction effectiveness as rated Quebec User Evaluation Satisfaction Assistive Technology (QUEST), 62% subjects usability score very high (>80 System Usability Scale (SUS)). reduction flexor during performance is not correlated level ergonomic risk involved. preliminary affirms potential adoption support activities processing, emphasizing its efficacy reducing activity. Positive worker acceptance intention supports broader preventive tool occupational sector.
Язык: Английский
Процитировано
9
Journal of Colloid and Interface Science, Год журнала: 2024, Номер 674, С. 392 - 404
Опубликована: Июнь 25, 2024
In this study, we present a nanocomposite hydrogel designed for skin motion sensing. The is based on poly(acrylamide) crosslinked with gold nanoparticles covalently bound to the polymer matrix, yielding robust, highly elastic and conductive material. choice of amino acid derivative - N,N'-diacryloylcystine salt (BISS) as crosslinker allows introduction nanoparticles, due presence sulfide groups in its structure. During nanoparticle modification process, covalent bonds between sulfur atoms are formed disulfide bond cleaved. result self-assembly multifunctional Au-BISS formed, enhancing material's mechanical properties introducing electrical conductivity. To confer anti-freezing limit water evaporation, binary mixture glycerol was used. resultant exhibits high elasticity, strain sensitivity across wide range various types deformation (elongation, bending, compression) exceptional response time (120 ms) recovery (90 ms). cold-resistance, resilience, conductivity make it well-suited real-time monitoring joint movements speech recognition, potential applications electronic healthcare devices.
Язык: Английский
Процитировано
9
Nano Energy, Год журнала: 2025, Номер unknown, С. 110669 - 110669
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
1