Approaching intrinsic dynamics of MXenes hybrid hydrogel for 3D printed multimodal intelligent devices with ultrahigh superelasticity and temperature sensitivity

Nature Communications, Journal Year: 2022, Volume and Issue: 13(1)

Published: June 14, 2022

Hydrogels are investigated broadly in flexible sensors which have been applied into wearable electronics. However, further application of hydrogels is restricted by the ambiguity sensing mechanisms, and multi-functionalization systems based on terms cost, difficulty integration, device fabrication remains a challenge, obstructing specific scenarios. Herein, cost-effective, structure-specialized scenario-applicable 3D printing direct ink writing (DIW) technology fabricated two-dimensional (2D) transition metal carbides (MXenes) bonded hydrogel sensor with excellent strain temperature performance developed. Gauge factor (GF) 5.7 (0 - 191% strain) high sensitivity (-5.27% °C-1) within wide working range 80 °C) can be achieved. In particular, corresponding mechanisms clarified finite element analysis first use situ temperature-dependent Raman for hydrogels, printed realize precise indication shape memory solar array hinge.

Language: Английский

---

Self-Healing, Wet-Adhesion silk fibroin conductive hydrogel as a wearable strain sensor for underwater applications

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 446, P. 136931 - 136931

Published: May 11, 2022

Language: Английский

---

Bacterial cellulose hydrogel for sensors

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 142062 - 142062

Published: Feb. 22, 2023

Language: Английский

---

Conductive polymer based hydrogels and their application in wearable sensors: a review

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

---

Hydrogels as Soft Ionic Conductors in Flexible and Wearable Triboelectric Nanogenerators

Advanced Science, Journal Year: 2022, Volume and Issue: 9(11)

Published: Feb. 20, 2022

Flexible triboelectric nanogenerators (TENGs) have attracted increasing interest since their advent in 2012. In comparison with other flexible electrodes, hydrogels possess transparency, stretchability, biocompatibility, and tunable ionic conductivity, which together provide great potential as current collectors TENGs for wearable applications. The development of hydrogel-based (H-TENGs) is currently a burgeoning field but research efforts lagged behind those common TENGs. order to spur this important area, comprehensive review that summarizes recent advances challenges H-TENGs will be very useful researchers engineers emerging field. Herein, the advantages types soft conductors are presented, followed by detailed descriptions advanced functions, enhanced output performance, well applications H-TENGs. Finally, prospects discussed.

Language: Английский

---

Piezoresistive MXene/Silk fibroin nanocomposite hydrogel for accelerating bone regeneration by Re-establishing electrical microenvironment

Bioactive Materials, Journal Year: 2022, Volume and Issue: 22, P. 1 - 17

Published: Sept. 23, 2022

The electrical microenvironment plays an important role in bone repair. However, the underlying mechanism by which stimulation (ES) promotes regeneration remains unclear, limiting design of microenvironment-specific electroactive materials. Herein, simple co-incubation aqueous suspensions at physiological temperatures, biocompatible regenerated silk fibroin (RSF) is found to assemble into nanofibrils with a β-sheet structure on MXene nanosheets, has been reported inhibit restacking and oxidation MXene. An hydrogel based RSF bioencapsulated thus prepared promote efficient regeneration. This MXene/RSF also acts as piezoresistive pressure transducer, can potentially be utilized monitor electrophysiological microenvironment. RNA sequencing performed explore mechanisms, activate Ca2+/CALM signaling favor direct osteogenesis process. ES facilitate indirect promoting polarization M2 macrophages, well stimulating neogenesis migration endotheliocytes. Consistent improvements angiogenesis are observed hydrogels under vivo. Collectively, provides distinctive promising strategy for osteogenesis, regulating immune neovascularization ES, leading re-establish

Language: Английский

---

Mechanically Strong, Freeze‐Resistant, and Ionically Conductive Organohydrogels for Flexible Strain Sensors and Batteries

Advanced Science, Journal Year: 2023, Volume and Issue: 10(9)

Published: Jan. 19, 2023

Abstract Conductive hydrogels as promising material candidates for soft electronics have been rapidly developed in recent years. However, the low ionic conductivity, limited mechanical properties, and insufficient freeze‐resistance greatly limit their applications flexible wearable electronics. Herein, aramid nanofiber (ANF)‐reinforced poly(vinyl alcohol) (PVA) organohydrogels containing dimethyl sulfoxide (DMSO)/H 2 O mixed solvents with outstanding are fabricated through solution casting 3D printing methods. The show both high tensile strength toughness due to synergistic effect of ANFs DMSO system, which promotes PVA crystallization intermolecular hydrogen bonding interactions between molecules well PVA, confirmed by a suite characterization molecular dynamics simulations. also exhibit ultrahigh ranging from 1.1 34.3 S m −1 at −50 60 °C. Building on these excellent organohydrogel‐based strain sensors solid‐state zinc–air batteries (ZABs) fabricated, broad working temperature range. Particularly, ZABs not only specific capacity (262 mAh g ) ultra‐long cycling life (355 cycles, 118 h) even −30 °C, but can work properly under various deformation states, manifesting great potential robotics

Language: Английский

---

Conductive Hydrogel for Flexible Bioelectronic Device: Current Progress and Future Perspective

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(1)

Published: Sept. 19, 2023

Abstract Conductive hydrogels (CHs) for flexible bioelectronic devices have raised great attention due to their tunable mechanical performances, adhesion, anti‐swelling, and biocompatibility. This review summarizes the current development of conductive hydrogel‐based in aspect classifications applications. Firstly, are classified into two kinds according types conductivity: ionic electronic (hydrogel based on pure materials, introducing micro/nano‐materials). Secondly, applications device, like wearable (strain sensor, body fluid detector, serviced extreme environment), tissue engineering (skin, heart, nerve, muscle), other (bionic robot, cancer treatment), highly illustrated. Finally, a depth outlook is given, which aims promote this field future.

Language: Английский

---

Water‐Resistant Conductive Gels toward Underwater Wearable Sensing

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(42)

Published: March 1, 2023

Abstract Conductive gels are developing vigorously as superior wearable sensing materials due to their intrinsic conductivity, softness, stretchability, and biocompatibility, showing a great potential in many aspects of lives. However, compared wide application on land, it is significant yet rather challenging for traditional conductive realize under water. The swelling the loss components aqueous environment, resulted from diffusion across interface, lead structural instability performance decline. Fortunately, efforts devoted improving water resistance employing them field underwater recent years, some exciting achievements obtained, which significance promoting safety efficiency activities. there no review thoroughly summarize gels. This presents brief overview representative design strategies water‐resistant diversified applications sensors. Finally, ongoing challenges further also discussed along with recommendations future.

Language: Английский

---

A conductive hydrogel based on nature polymer agar with self-healing ability and stretchability for flexible sensors

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 454, P. 139843 - 139843

Published: Oct. 27, 2022

Language: Английский

---