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Zhang S, Guo F, Li M, Yang M, Zhang D, Han L, Li X, Zhang Y, Cao A, Shang Y. Fast gelling, high performance MXene hydrogels for wearable sensors. J Colloid Interface Sci 2024; 658:137-147. [PMID: 38100970 DOI: 10.1016/j.jcis.2023.12.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 11/27/2023] [Accepted: 12/07/2023] [Indexed: 12/17/2023]
Abstract
Hydrogel-based functional materials had attracted great attention in the fields of artificial intelligence, soft robotics, and motion monitoring. However, the gelation of hydrogels induced by free radical polymerization typically required heating, light exposure, and other conditions, limiting their practical applications and development in real-life scenarios. In this study, a simple and direct method was proposed to achieve rapid gelation at room temperature by incorporating reductive MXene sheets in conjunction with metal ions into the chitosan network and inducing the formation of a polyacrylamide network in an extremely short time (10 s). This resulted in a dual-network MXene-crosslinked conductive hydrogel composite that exhibited exceptional stretchability (1350 %), remarkably low dissipated energy (0.40 kJ m-3 at 100 % strain), high sensitivity (GF = 2.86 at 300-500 % strain), and strong adhesion to various substrate surfaces. The study demonstrated potential applications in the reliable detection of various motions, including repetitive fine movements and large-scale human body motions. This work provided a feasible platform for developing integrated wearable health-monitoring electronic systems.
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Affiliation(s)
- Shipeng Zhang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Fengmei Guo
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Meng Li
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China; School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Mengdan Yang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Ding Zhang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Lei Han
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China; School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Xinjian Li
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Yingjiu Zhang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China
| | - Anyuan Cao
- School of Materials Science and Engineering, Peking University, Beijing 100871, China
| | - Yuanyuan Shang
- Key Laboratory of Material Physics, Ministry of Education, School of Physics and Microelectronics, Zhengzhou University, Zhengzhou 450052, China.
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Yin H, Liu F, Abdiryim T, Chen J, Liu X. Sodium carboxymethyl cellulose and MXene reinforced multifunctional conductive hydrogels for multimodal sensors and flexible supercapacitors. Carbohydr Polym 2024; 327:121677. [PMID: 38171688 DOI: 10.1016/j.carbpol.2023.121677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 11/27/2023] [Accepted: 12/06/2023] [Indexed: 01/05/2024]
Abstract
With the growing demand for eco-friendly materials in wearable smart electronic devices, renewable, biocompatible, and low-cost hydrogels based on natural polymers have attracted much attention. Cellulose, as one of the renewable and degradable natural polymers, shows great potential in wearable smart electronic devices. Multifunctional conductive cellulose-based hydrogels are designed for flexible electronic devices by adding sodium carboxymethyl cellulose and MXene into polyacrylic acid networks. The multifunctional hydrogels possess excellent mechanical property (stress: 310 kPa; strain: 1127 %), toughness (206.67 KJ m-3), conductivity (1.09 ± 0.12 S m-1) and adhesion (82.19 ± 3.65 kPa). The multifunctional conductive hydrogels serve as strain sensors (Gauge Factor (GF) = 5.79, 0-700 % strain; GF = 14.0, 700-900 % strain; GF = 40.36, 900-1000 % strain; response time: 300 ms; recovery time: 200 ms) and temperature sensors (Temperature coefficient of resistance (TCR) = 2.5755 °C-1 at 35 °C- 60 °C). The sensor detects human activities with clear and steady signals. A distributed array of flexible sensors is created to measure the magnitude and distribution of pressure and a hydrogel-based flexible touch keyboard is also fabricated to recognize writing trajectories, pressures and speeds. Furthermore, a flexible hydrogel-based supercapacitor powers the LED and exhibits good cyclic stability over 15,000 charge-discharge cycles.
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Affiliation(s)
- Hongyan Yin
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China
| | - Fangfei Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.
| | - Tursun Abdiryim
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China
| | - Jiaying Chen
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China
| | - Xiong Liu
- State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, PR China.
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Lorencova L, Kasak P, Kosutova N, Jerigova M, Noskovicova E, Vikartovska A, Barath M, Farkas P, Tkac J. MXene-based electrochemical devices applied for healthcare applications. Mikrochim Acta 2024; 191:88. [PMID: 38206460 PMCID: PMC10784403 DOI: 10.1007/s00604-023-06163-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Accepted: 12/20/2023] [Indexed: 01/12/2024]
Abstract
The initial part of the review provides an extensive overview about MXenes as novel and exciting 2D nanomaterials describing their basic physico-chemical features, methods of their synthesis, and possible interfacial modifications and techniques, which could be applied to the characterization of MXenes. Unique physico-chemical parameters of MXenes make them attractive for many practical applications, which are shortly discussed. Use of MXenes for healthcare applications is a hot scientific discipline which is discussed in detail. The article focuses on determination of low molecular weight analytes (metabolites), high molecular weight analytes (DNA/RNA and proteins), or even cells, exosomes, and viruses detected using electrochemical sensors and biosensors. Separate chapters are provided to show the potential of MXene-based devices for determination of cancer biomarkers and as wearable sensors and biosensors for monitoring of a wide range of human activities.
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Affiliation(s)
- Lenka Lorencova
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic.
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar.
| | - Peter Kasak
- Center for Advanced Materials, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Natalia Kosutova
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic
| | - Monika Jerigova
- International Laser Center, Slovak Center of Scientific and Technical Information, Ilkovicova 3, 841 04, Bratislava, Slovak Republic
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, Mlynska Dolina, 842 15, Bratislava, Slovak Republic
| | - Eva Noskovicova
- International Laser Center, Slovak Center of Scientific and Technical Information, Ilkovicova 3, 841 04, Bratislava, Slovak Republic
- Department of Physical and Theoretical Chemistry, Faculty of Natural Sciences, Comenius University, Ilkovicova 6, Mlynska Dolina, 842 15, Bratislava, Slovak Republic
| | - Alica Vikartovska
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic
| | - Marek Barath
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic
| | - Pavol Farkas
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic
| | - Jan Tkac
- Institute of Chemistry, Slovak Academy of Sciences, Dubravska cesta 5807/9, 845 38, Bratislava, Slovak Republic.
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Chen J, Xia X, Yan X, Wang W, Yang X, Pang J, Qiu R, Wu S. Machine Learning-Enhanced Biomass Pressure Sensor with Embedded Wrinkle Structures Created by Surface Buckling. ACS APPLIED MATERIALS & INTERFACES 2023; 15:46440-46448. [PMID: 37725344 DOI: 10.1021/acsami.3c06809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Flexible piezoresistive sensors are core components of many wearable devices to detect deformation and motion. However, it is still a challenge to conveniently prepare high-precision sensors using natural materials and identify similar short vibration signals. In this study, inspired by microstructures of human skins, biomass flexible piezoresistive sensors were prepared by assembling two wrinkled surfaces of konjac glucomannan and k-carrageenan composite hydrogel. The wrinkle structures were conveniently created by hardness gradient-induced surface buckling and coated with MXene sheets to capture weak pressure signals. The sensor was applied to detect various slight body movements, and a machine learning method was used to enhance the identification of similar and short throat vibration signals. The results showed that the sensor exhibited a high sensitivity of 5.1 kPa-1 under low pressure (50 Pa), a fast response time (104 ms), and high stability over 100 cycles. The XGBoost machine learning model accurately distinguished short voice vibrations similar to those of individual English letters. Moreover, experiments and numerical simulations were carried out to reveal the mechanism of the wrinkle structure preparation and the excellent sensing performance. This biomass sensor preparation and the machine learning method will promote the optimization and application of wearable devices.
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Affiliation(s)
- Jie Chen
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaolu Xia
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiaoqian Yan
- College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Wenjing Wang
- College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Xiaoyi Yang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jie Pang
- College of Food Science, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Renhui Qiu
- College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Shuyi Wu
- College of Transportation and Civil Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
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