Hydrophobic and Adhesive Elastomer Encapsulation for Anti‐Drying, Non‐Swelling, and Adhesive Hydrogels DOI

Huixin Yuan,

Tang Zhu,

Yuchan Huang

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: unknown

Published: July 25, 2024

Abstract Traditional hydrogels often face issues like dehydration, excessive swelling, and poor adhesion, limiting their practical applications. This study presents a facile universal method to create elastomer‐encapsulated with improved water retention, non‐swelling, enhanced adhesion. n‐Butyl acrylate (BA) 2,2,3,4,4,4‐hexafluorobutyl methacrylate (HFBMA) are utilized as the “soft” “hard” monomers, respectively, in situ construct elastomer coatings on hydrogel surface through surface‐confined copolymerization. The resulting transparent, hydrophobic, adhesive coating is tightly bound surface, conferring upon it robust defense against dehydration swelling various media, strong adhesion diverse substrates both aerial submerged conditions. Furthermore, this encapsulation strategy also augments mechanical attributes of bulk hydrogel, including its tensile properties puncture resistance, applicable wide array types configurations. Additionally, applied conductive results flexible sensors high sensitivity, reversible resistance change, exceptional sensing stability, significantly durability air underwater environments. These suggest potential applications harsh environments, such acoustic detection sonar scanning camouflage for submarines.

Language: Английский

Conductive polymer based hydrogels and their application in wearable sensors: a review DOI Creative Commons
Dong Liu,

Chenxi Huyan,

Zibi Wang

et al.

Materials Horizons, Journal Year: 2023, Volume and Issue: 10(8), P. 2800 - 2823

Published: Jan. 1, 2023

Hydrogels have been attracting increasing attention for application in wearable electronics, due to their intrinsic biomimetic features, highly tunable chemical-physical properties (mechanical, electrical, etc.), and excellent biocompatibility. Among many proposed varieties of hydrogels, conductive polymer-based hydrogels (CPHs) emerged as a promising candidate future sensor designs, with capability realizing desired features using different tuning strategies ranging from molecular design (with low length scale 10-10 m) micro-structural configuration (up 10-2 m). However, considerable challenges remain be overcome, such the limited strain sensing range mechanical strength, signal loss/instability caused by swelling/deswelling, significant hysteresis signals, de-hydration induced malfunctions, surface/interfacial failure during manufacturing/processing. This review aims offer targeted scan recent advancements CPH based technology, establishment dedicated structure-property relationships lab advanced manufacturing routes potential scale-up production. The CPHs sensors is also explored, suggested new research avenues prospects included.

Language: Английский

Citations

118
Super‐Stretchable, Anti‐Freezing, Anti‐Drying Organogel Ionic Conductor for Multi‐Mode Flexible Electronics DOI
Yong Long, Bing Jiang,

Tianci Huang

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(41)

Published: June 9, 2023

Abstract Due to their intrinsic flexibility, tunable conductivity, multiple stimulus‐response, and self‐healing ability, ionic conductive hydrogels have drawn significant attention in flexible/wearable electronics. However, challenges remain because traditional inevitably faced the problems of losing flexibility conductivity inner water loss when exposed ambient environment. Besides, inside hydrogel will freeze at icing temperatures, making device hard fragile. As a promising alternative, organogels attracted wide they can, some extent, overcome above drawbacks. Herein, kind organogel conductor (MOIC) by self‐polymerization reaction is involved, which super stretchable, anti‐drying, anti‐freezing. Meanwhile, it can still maintain high mechanical stability after alternately loading/unloading strain 600% for 600 s (1800 cycles). Using this MOIC, high‐performance triboelectric nanogenerator (TENG) constructed (MOIC‐TENG) harvest small energy even MOIC electrode underwent an extremely low temperature. In addition, multifunctional sensors (strain sensor, piezoresistive tactile sensor) are realized monitor human motions real time, recognize different materials effect. This study demonstrates candidate material electronics such as electronic skin, flexible sensors, human‐machine interfaces.

Language: Английский

Citations

67
Flexible Conformally Bioadhesive MXene Hydrogel Electronics for Machine Learning‐Facilitated Human‐Interactive Sensing DOI
Wei Wang,

Hailiang Zhou,

Zhishan Xu

et al.

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(31)

Published: March 29, 2024

Wearable epidermic electronics assembled from conductive hydrogels are attracting various research attention for their seamless integration with human body conformally real-time health monitoring, clinical diagnostics and medical treatment, human-interactive sensing. Nevertheless, it remains a tremendous challenge to simultaneously achieve bioadhesive remarkable self-adhesiveness, reliable ultraviolet (UV) protection ability, admirable sensing performance high-fidelity epidermal electrophysiological signals along timely photothermal therapeutic performances after diagnostic sensing, as well efficient antibacterial activity hemostatic effect potential therapy. Herein, hydrogel-based sensor, featuring superior self-adhesiveness excellent UV-protection performance, is developed by dexterously assembling conducting MXene nanosheets network biological hydrogel polymer stably attaching onto skin high-quality recording of high signal-to-noise ratios (SNR) low interfacial impedance intelligent diagnosis smart human-machine interface. Moreover, sign language gesture recognition platform based on collected electromyogram (EMG) designed hassle-free communication hearing-impaired people the help advanced machine learning algorithms. Meanwhile, possesses capability, biocompatibility, effective hemostasis properties promising bacterial-infected wound bleeding.

Language: Английский

Citations

66
All‐Weather Self‐Powered Intelligent Traffic Monitoring System Based on a Conjunction of Self‐Healable Piezoresistive Sensors and Triboelectric Nanogenerators DOI
Yongji Li, Zhongyuan Tian,

Xuan‐Zhi Gao

et al.

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(52)

Published: Sept. 13, 2023

Abstract A self‐powered and sustainable traffic monitoring system is highly required for future urban development. Herein, self‐healable piezoresistive sensors triboelectric nanogenerators (TENGs) are constructed by in situ polymerization of polyvinyl alcohol‐polyacrylamide double network hydrogel the presence sodium alginate tannic acid‐modified cellulose nanocrystals (denoted as PPC) all‐weather intelligent applications. Because hydrogen bonding boron ester bonding, resultant PPC‐based strain sensor can rapidly self‐heal restore its sensing ability within 1 min with a self‐healing efficiency 97.4%. Based on effect, ions endow relatively high gauge factor 8.39, which monitor motion fatigue drivers. triboelectrification TENG detect instantaneous vehicle speed, judge accident liability, evaluate weight, alert driver to prevent accidents caused drowsy driving. After partially replacing water PPC glycerin, resulting exhibits stable performance at temperatures ranging from ‐30 40 °C, ensuring ability. The promising security cities.

Language: Английский

Citations

46
Environment‐Tolerant Conductive Eutectogels for Multifunctional Sensing DOI
Bingyan Guo, Mengmeng Yao, Shuang Chen

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(26)

Published: Feb. 29, 2024

Abstract Conductive hydrogels have shown significant potential in the realm of flexible electronics; however, using water as a solvent introduces problems such low‐temperature freezing and loss. One possible solution to address these limitations is replacing with deep eutectic solvents (DES). In this study, PHEAA–gelatin–MXene (PGM) eutectogels are constructed poly( N ‐hydroxyethyl acrylamide) (PHEAA) gelatin main components, MXene nanosheets added nanofillers. The PGM exhibit exceptional tensile compressive mechanical properties, including remarkable stretchability (940%), high strength (0.5 MPa), toughness (1.39 MJ m −3 ), impressive (0.3 MPa at 80% strain). Additionally, demonstrate excellent adhesion, anti‐freezing, long‐term anti‐drying abilities. Moreover, multifunctional sensors allow sensitivity, which enables accurate real‐time stable monitoring human activities over wide temperature range. Consequently, hold great candidates fields wearable devices, personal healthcare, human–machine interfaces.

Language: Английский

Citations

34
Flexible resistive tactile pressure sensors DOI
Q.S. Shu,

Yuncong Pang,

Qiqi Li

et al.

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(16), P. 9296 - 9321

Published: Jan. 1, 2024

This review covers recent advancements in flexible resistive tactile pressure sensors, including operational principles, performance metrics, material choices, structural design, and applications, as well future challenges.

Language: Английский

Citations

30
Neural Network‐Inspired Polyurea Ionogel with Mechanical Robustness, Low Hysteresis, and High Transparency for Soft Iontronics DOI
Zhipeng Zhang, Qian Lu,

Jianfeng Cheng

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(37)

Published: March 7, 2024

Abstract Concurrently achieving mechanical robustness, low hysteresis, and high transparency are essential for ionogels to enhance their reliability satisfy the requirements in soft electronics. Fabricating comprising these characteristics presents a considerable challenge. Herein, inspired by structure of neural networks, new strategy situ formation dense urea moieties aggregated domains is proposed achieve topology‐tailoring polyurea ionogels. Initially, leveraging pronounced disparity reactivity isocyanate (─NCO) groups between isophorone diisocyanate (IPDI) NCO‐terminated prepolymer (PPGTD), IPDI preferentially reacts with deblocked trifunctional latent curing agents, resulting domains. Thereafter, interconnected via PPGTD establish polymer networks which ionic liquid uniformly dispersed, forming like Attributed this unique design strategy, ionogel demonstrates remarkable properties, including strength (0.6–2.4 MPa), excellent toughness (0.9–4.3 MJ m −3 ), hysteresis (6.6–11.6%), (>92%), along enhanced fatigue puncture resistance. Furthermore, exhibit outstanding versatility, enabling strain sensors, flexible electroluminescence devices, nanogenerators. This contributes unparalleled combinatory catering diverse demands iontronics.

Language: Английский

Citations

25
Ultra-fast cryogenic self-healing ionic hydrogel for flexible wearable bioelectronics DOI

Lianghao Jia,

Jinrui Jiang,

Aobo Ren

et al.

Chemical Engineering Journal, Journal Year: 2024, Volume and Issue: 495, P. 153734 - 153734

Published: July 3, 2024

Language: Английский

Citations

20
Water: The soul of hydrogels DOI
Yuan Yue, Qianqian Zhang, Shumiao Lin

et al.

Progress in Materials Science, Journal Year: 2024, Volume and Issue: unknown, P. 101378 - 101378

Published: Sept. 1, 2024

Language: Английский

Citations

20
Lignin‐Alkali Metal Ion Self‐Catalytic System Initiated Rapid Polymerization of Hydrogel Electrolyte with High Strength and Anti‐Freezing Ability DOI

Huawei Su,

Qingqing Guo, Congde Qiao

et al.

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(25)

Published: Feb. 4, 2024

Abstract Hydrogel electrolyte is not resistant to freezing and has weak mechanical properties, its fabrication time‐consuming energy‐consuming, limiting application. Here, a simple, universal, fast gelation based on dealkaline lignin (DL) ‐alkali metal ions developed. The complex formed by catechol alkali promotes the equilibrium of redox reactions. produced SO 4 − ·, OH· singlet oxygen ( 1 O 2 ) radicals are responsible for rapid polymerization vinyl monomers. Alkali play dual role in frost resistance hydrogel electrolytes. By modulating mass ratio DL ion concentration, preferred can be fabricated an alkaline aqueous solution min at room temperature possesses excellent anti‐freezing performance (0.51 mS cm −1 −40 °C) strong properties (tensile stress: 0.4 MPa, strain: 1125%). electrolyte‐assembled supercapacitor exhibits high stability low temperatures. specific capacitance retention 89.7 % 88.7 after 5000 charge/discharge cycles 25 −20 °C, respectively. lignin‐alkali self‐catalytic system completely different from reported lignin‐oxidizing will open up new way ionic conductors energy storage devices.

Language: Английский

Citations

18