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Xue R, Wang CX, Zhao ZG, Chen YH, Yang J, Feng CP. Flexible Silica/MXene/Natural rubber film strain sensors with island chain structure for Healthcare monitoring. J Colloid Interface Sci 2023; 650:1235-1243. [PMID: 37478740 DOI: 10.1016/j.jcis.2023.07.093] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 07/23/2023]
Abstract
The demand for flexible strain sensors with high sensitivity and durability has increased significantly. However, traditional sensors are limited in terms of their detection ranges and fabrications. In this work, a space stacking method was proposed to fabricate natural rubber (NR)/ Ti3C2Tx (MXene)/silica (SiO2) films that possessed exceptional electrical conductivity, sensitivity and reliability. The introduction of SiO2 into the NR/MXene composite enabled the construction of an "island-chain structure", which promoted the formation of conductive pathways and significantly improved the conductivity of the composite. Specifically, the electrical conductivity of the NR/MXene/10 wt%SiO2 composite was enhanced by about 200 times compared to that of the NR/MXene composite alone (from 0.07 to 13.4 S/m). Additionally, the "island-chain structure" further enhanced the sensing properties of the NR/MXene/10 wt%SiO2 composite, as evidenced by its excellent sensitivity (GF = 189.2), rapid response time (102 ms), and good repeatability over 10,000 cycles. The fabricated device demonstrates an outstanding mechanical sensing performance and can accurately detect human physiological signals. Specifically, the device serves as a strain detector, recognizing different strain signals by monitoring the movement of fingers, arms, and thighs. This study provides critical insights into composite manufacturing with exceptional conductivity, flexibility and stability, which are essential properties for creating high-performance flexible sensors.
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Affiliation(s)
- Rong Xue
- National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China
| | - Chou-Xuan Wang
- National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China
| | - Zhong-Guo Zhao
- National and Local Engineering Laboratory for Slag Comprehensive Utilization and Environment Technology, School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723000, China.
| | - Yan-Hui Chen
- School of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Macromolecular Science and Technology, Key Laboratory of Special Functional and Smart Polymer Materials of Ministry of Industry and Information Technology, Northwestern Polytechnical University, Xi'an 710072, China.
| | - Jie Yang
- School of Materials Science and Engineering, Xi'an Polytechnic University, Xi'an 710048, China
| | - Chang-Ping Feng
- Shandong Engineering Research Center for Additive Manufacturing, Qingdao University of Technology, Qingdao 266520, China
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Chen L, Sun Y, Wang J, Ma C, Peng S, Cao X, Yang L, Ma C, Duan G, Liu Z, Wang H, Yuan Y, Wang N. A wood-mimetic porous MXene/gelatin hydrogel for electric field/sunlight bi-enhanced uranium adsorption. E-POLYMERS 2022. [DOI: 10.1515/epoly-2022-0045] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Abstract
Although diverse uranium (U) adsorbents have been explored, it is still a great challenge for high-efficient uranium extraction form seawater. Herein a wood-mimetic oriented porous Ti3C2T
x
-MXene/gelatin hydrogel (MGH) has been explored through growing directional ice crystals cooled by liquid nitrogen and subsequently forming pores by freeze-dry (Ice-template) method, for ultrafast and high-efficient U-adsorption from seawater with great enhancement by both electric field and sunlight. Different from disperse Ti3C2T
x
-MXene powder, this MGH not only can be easily utilized but also can own ultrahigh specific surface area for high-efficient U-adsorption. The U-adsorbing capacity of this MGH (10 mg) can reach 4.17 mg·g−1 after only 1 week in 100 kg of seawater, which is outstanding in existing adsorbents. Furthermore, on the positive pole of 0.4 V direct current source or under 1-sun irradiation, the U-adsorbing capacity of the MGH can increase by 57.11% and 13.57%, respectively. Most importantly, the U-adsorption of this hydrogel can be greatly enhanced by simultaneously using the above two methods, which can increase the U-adsorbing capacity by 79.95% reaching 7.51 mg·g−1. This work provides a new biomimetic porous MXene-based hydrogel for electric field/sunlight bi-enhanced high-efficient U-extraction from seawater, which will inspire new strategy to design novel U-adsorbents and systems.
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Affiliation(s)
- Lin Chen
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Ye Sun
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Jiawen Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Chao Ma
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Shuyi Peng
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Xingyu Cao
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Lang Yang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Chunxin Ma
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
- Research Institute of Zhejiang University-Taizhou , Taizhou 318000 , China
| | - Gaigai Duan
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University , Nanjing , 210037 , China
| | - Zhenzhong Liu
- Research Institute of Zhejiang University-Taizhou , Taizhou 318000 , China
| | - Hui Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Yihui Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
| | - Ning Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University , Haikou 570228 , China
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Liang S, Qin Y, Gao W, Wang M. A lightweight polyurethane-carbon microsphere composite foam for electromagnetic shielding. E-POLYMERS 2022. [DOI: 10.1515/epoly-2022-0023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In this study, we have produced a lightweight foam composite material by a simple freeze-drying method, which is composed of carboxylated multi-walled carbon nanotubes (MWCNTs), mesoporous carbon hollow microspheres (MCHMs), water-based polyurethane (WPU), and polyvinyl alcohol (PVA). MCHMs were prepared by a novel and facile method. We found that the electromagnetic shielding performance of foam composites can be adjusted by adjusting the density of foam composites, and the electromagnetic shielding performance of composites can be enhanced through the synergistic effect of hollow mesoporous carbon and MWCNTs. The composite material with a density of 232.8042 mg·cm−3 and 40 wt% MWCNT has a δ of 30.2 S·m−1 and SE of 23 dB. After adding 10 wt% MCHMs to the composite material, δ reaches 33.2 S·m−1, and SE reaches 28 dB. Both absorption losses accounted for 70%. The increase in the content of MWCNT, the increase in density, and the introduction of MCHMs all have a positive effect on the δ and SE of the composite material.
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Affiliation(s)
- Shaofeng Liang
- School of Resources, Environment and Materials, Guangxi University , Nanning 530000 , Guangxi , China
| | - Yuxuan Qin
- School of Resources, Environment and Materials, Guangxi University , Nanning 530000 , Guangxi , China
| | - Wei Gao
- School of Resources, Environment and Materials, Guangxi University , Nanning 530000 , Guangxi , China
- Guangxi Engineering and Technology Research Center for High Quality Structural Panels from Biomass Wastes , Nanning 530000 , Guangxi , China
| | - Muqun Wang
- School of Resources, Environment and Materials, Guangxi University , Nanning 530000 , Guangxi , China
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Zhu J, Li X, Weng Y, Tan B, Zhang S. Fabrication of microcellular epoxidized natural rubber foam with superior ductility by designable chemical and physical crosslinking networks. J Supercrit Fluids 2022. [DOI: 10.1016/j.supflu.2021.105508] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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