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Xing R, Liu Y, Yan J, Wang R, Zhuang X, Yang G. High-performance, breathable and flame-retardant moist-electric generator based on asymmetrical nanofiber membrane assembly. J Colloid Interface Sci 2024; 671:205-215. [PMID: 38797146 DOI: 10.1016/j.jcis.2024.05.147] [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: 02/11/2024] [Revised: 05/07/2024] [Accepted: 05/19/2024] [Indexed: 05/29/2024]
Abstract
Moist-electric generators (MEGs), which are capable of spontaneously generating energy from ubiquitous moisture, are considered as a potential power supply candidate for wearable electronics. However, the application of the MEGs in the wearable field is still challenging due to the low electric output and the lack of wearable attributes such as breathability and flame retardancy. Herein, we demonstrated a wearable MEG with high power-output, breathability and flame retardancy, which was fabricated by designing an asymmetrical nanofiber assembly using hydrophilic polyvinyl alcohol/phytic acid (PVA/PA) and hydrophobic polyvinylidene difluoride (PVDF) nanofiber membranes. Owing to the synergistic effects of strong water absorption, enhanced ion release and numerous micro-nano transport channels, a single MEG of 1 cm2 could constantly generate high direct-current (DC) power, i.e., a voltage of 1.0 V, a current of 15.5 μA, and a power density of 3.0 μW cm-2, outperforming other reported nanofiber-based MEGs. More importantly, the asymmetric nanofiber structure ensured the moisture circulation inside MEG and thus produced a sustained voltage output for 7 days without any deterioration. The MEG also showed good flexibility, air/moisture permeability and flame retardancy, which give it necessary wearable attributes. Furthermore, large-scale integration of MEG units could be readily realized to fabricate a power source device for driving different portable electronics, while the moisture sensitivity made the MEG well used for sensing applications (e.g., respiration monitoring, fire warning).
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Affiliation(s)
- Renquan Xing
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Ying Liu
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Jing Yan
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Run Wang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xupin Zhuang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
| | - Guang Yang
- State Key Laboratory of Separation Membranes and Membrane Processes/National Center for International Joint Research on Separation Membranes, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China.
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Yu J, Li L, Liu Y, Wen J, Liu S, Li J, Ning J, Shao C, Wu T, Liu B. Solar-Driven Evaporator With "Starburst Turbine" Design Featuring Directional Salt Crystallization, Antibacterial, and Catalytic Multifunctionality for Efficient Water Purification. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2024:e2406696. [PMID: 39320342 DOI: 10.1002/advs.202406696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2024] [Revised: 08/28/2024] [Indexed: 09/26/2024]
Abstract
Facing the global challenge of water scarcity, solar-driven desalination is considered a sustainable technology for obtaining freshwater from seawater. However, issues such as uncontrolled salt crystallization and bacterial contamination limit its efficiency and practicality. This study proposes an innovative solar-driven evaporator designed to address these challenges using optimized shape design and advanced photothermal materials. Based on finite element analyses, cylindrical evaporators with a "Starburst Turbine" shape are designed and fabricated, achieving directional salt crystallization and a record-breaking water collection rate of 3.56 kg m-2 h-1 and an evaporation rate of 4.57 kg m-2 h-1 under one sun illumination. During continuous 60-h illumination tests, the evaporator maintained a stable evaporation rate, attributed to its excellent directional salt crystallization capability. Additionally, the evaporator demonstrates superior photodynamic antibacterial performance and photocatalytic degradation of organic pollutants. Under one sun illumination for 1 h, it achieves 100% sterilization of S. aureus and E. coli, and a 95.4% degradation of methylene blue (MB), demonstrating its potential to purify various wastewater types. These findings underscore the significant scientific and practical value of integrating antibacterial and photocatalytic functions into solar water purification materials, providing a sustainable solution to global water scarcity challenges and environmental protection.
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Affiliation(s)
- Jiahui Yu
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Lele Li
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Yuxuan Liu
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Jie Wen
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Shu Liu
- Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Jiye Li
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Junyi Ning
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Changxiang Shao
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
| | - Tao Wu
- Department of Chemical and Environmental Engineering, The University of Nottingham Ningbo China, Ningbo, 315100, China
| | - Bing Liu
- Department of Stomatology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, 250021, China
- Medical Science and Technology Innovation Center, School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, 250117, China
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Zhang Y, Wang H, Ahmed Khan S, Li J, Bai C, Zhang H, Guo R. Deep-learning-assisted thermogalvanic hydrogel fiber sensor for self-powered in-nostril respiratory monitoring. J Colloid Interface Sci 2024; 678:143-149. [PMID: 39288575 DOI: 10.1016/j.jcis.2024.09.132] [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: 08/27/2024] [Revised: 09/12/2024] [Accepted: 09/13/2024] [Indexed: 09/19/2024]
Abstract
Direct and consistent monitoring of respiratory patterns is crucial for disease prognostication. Although the wired clinical respiratory monitoring apparatus can operate accurately, the existing defects are evident, such as the indispensability of an external power supply, low mobility, poor comfort, and limited monitoring timeframes. Here, we present a self-powered in-nostril hydrogel sensor for long-term non-irritant anti-interference respiratory monitoring, which is developed from a dual-network binary-solvent thermogalvanic polyvinyl alcohol hydrogel fiber (d = 500 μm, L=30 mm) with Fe2+/Fe3+ ions serving as a redox couple, which can generate a thermoelectrical signal in the nasal cavity based on the temperature difference between the exhaled gas and skin as well as avoid interference from the external environment. Due to strong hydrogen bonding between solvent molecules, the sensor retains over 90 % of its moisture after 14 days, exhibiting great potential in wearable respiratory surveillance. With the assistance of deep learning, the hydrogel fiber-based respiration monitoring strategy can actively recognize seven typical breathing patterns with an accuracy of 97.1 % by extracting the time sequence and dynamic parameters of the thermoelectric signals generated by respiration, providing an alert for high-risk respiratory symptoms. This work demonstrates the significant potential of thermogalvanic gels for next-generation wearable bioelectronics for early screening of respiratory diseases.
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Affiliation(s)
- Yang Zhang
- School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Han Wang
- School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China
| | - Saeed Ahmed Khan
- Department of Electrical Engineering, Sukkur IBA University, Sukkur 65200, Pakistan
| | - Jianing Li
- College of Integrated Circuits, Taiyuan University of Technology, Taiyuan 030024, China
| | - Chenhui Bai
- College of Integrated Circuits, Taiyuan University of Technology, Taiyuan 030024, China
| | - Hulin Zhang
- College of Integrated Circuits, Taiyuan University of Technology, Taiyuan 030024, China.
| | - Rui Guo
- School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan 030024, China; Shanxi Fenxi Heavy Industry Co., Ltd., Taiyuan 030024, China.
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Cong C, Wang R, Zhu W, Zheng X, Sun F, Wang X, Jiang F, Joo SW, Lim S, Kim SH, Li X. Self-powered strain sensing devices with wireless transmission: DIW-printed conductive hydrogel electrodes featuring stretchable and self-healing properties. J Colloid Interface Sci 2024; 678:588-598. [PMID: 39265331 DOI: 10.1016/j.jcis.2024.08.262] [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: 07/15/2024] [Revised: 08/28/2024] [Accepted: 08/30/2024] [Indexed: 09/14/2024]
Abstract
With rapid advancements in health and human-computer interaction, wearable electronic skins (e-skins) designed for application on the human body provide a platform for real-time detection of physiological signals. Wearable strain sensors, integral functional units within e-skins, can be integrated with Internet of Things (IoT) technology to broaden the applications for human body monitoring. A significant challenge lies in the reliance of most existing wearable strain sensors on rigid external power supplies, limiting their practical flexibility. In this study, we present an innovative strategy to fabricate glutaraldehyde (GA)-poly(vinyl alcohol) (PVA)/cellulose nanocrystals (CNC)/Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) conductive hydrogels through multiple hydrogen bonding systems. Combining the advantageous rheological properties of the precursor solution and the high specific surface area after freeze-thaw cycling, we have created a self-powered sensing system prepared by large-area printing using direct ink writing (DIW) printing. The resulting conductive hydrogel exhibits commendable mechanical properties (411 KPa), impressive stretchability (580 %), and robust self-healing capabilities (>98.3 %). The strain sensor, derived from the conductive hydrogel, demonstrates a gauge factor (GF) of 2.5 within a stretching range of 0-580 %. Additionally, the resultant supercapacitor displays a peak energy density of 0.131 mWh/cm3 at a power density of 3.6 mW/cm3. Benefiting from its elevated strain response and remarkable power density features, this self-powered strain sensing system enables the real-time monitoring of human joint motion. The incorporation of a 5G transmission module enhances its capabilities for remote data monitoring, thereby contributing to the progress of wireless tracking technologies for self-powered electronic skin.
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Affiliation(s)
- Chenhao Cong
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China; School of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea
| | - Rong Wang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Wenhu Zhu
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Xianbin Zheng
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Fenglin Sun
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Xuhao Wang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Fuhao Jiang
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China
| | - Sang Woo Joo
- School of Mechanical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk 38541, Republic of Korea
| | - Sooman Lim
- Department of Flexible and Printable Electronics, LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, Jeonju 54896, Republic of Korea.
| | - Se Hyun Kim
- School of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea.
| | - Xinlin Li
- College of Mechanical and Electrical Engineering, Qingdao University, Qingdao 266071, China.
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Cui M, Liu S, Xie X, Yang J, Wang T, Jiao Y, Lin M, Sui K. Self-Assembly Reinforced Alginate Fibers for Enhanced Strength, Toughness, and Bone Regeneration. Biomacromolecules 2024; 25:3475-3485. [PMID: 38741285 DOI: 10.1021/acs.biomac.4c00091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Material reinforcement commonly exists in a contradiction between strength and toughness enhancement. Herein, a reinforced strategy through self-assembly is proposed for alginate fibers. Sodium alginate (SA) microstructures with regulated secondary structures are assembled in acidic and ethanol as reinforcing units for alginate fibers. Acidity increases the flexibility of the helix and contributes to enhanced extendibility. Ethanol is responsible for formation of a stiff β-sheet, which enhances the modulus and strength. The structurally engineered SA assembly exhibits robust mechanical compatibility, and thus reinforced alginate fibers possess an improved tensile strength of 2.1 times, a prolonged elongation of 1.5 times, and an enhanced toughness of 3.0 times compared with SA fibers without reinforcement. The reinforcement through self-assembly provides an understanding of strengthening and toughening mechanism based on secondary structures. Due to a similar modulus with bones, reinforced alginate fibers exhibit good efficacy in accelerating bone regeneration in vivo.
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Affiliation(s)
- Min Cui
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Shuwei Liu
- Joint Laboratory of Opto-Functional Theranostics in Medicine and Chemistry, The First Hospital of Jilin University, Changchun 130012, P. R. China
| | - Xuelai Xie
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Jinhong Yang
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Tianyuan Wang
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Yuyang Jiao
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Min Lin
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
| | - Kunyan Sui
- State Key Laboratory of Bio-Fibers and Eco-textiles, College of Materials Science and Engineering, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Qingdao University, Qingdao 266071, P. R. China
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Wang YQ, Cao M, Liu BW, Zeng FR, Fu Q, Zhao HB, Wang YZ. Controllable proton-reservoir ordered gel towards reversible switching and reliable electromagnetic interference shielding. MATERIALS HORIZONS 2024; 11:978-987. [PMID: 38112580 DOI: 10.1039/d3mh01795h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
Smart and dynamic electromagnetic interference (EMI) shielding materials possess a remarkable capacity to modify their EMI shielding abilities, rendering them invaluable in various civil and military applications. However, the present response mechanism of switch-type EMI shielding materials is slightly restricted, as it primarily depends on continuous pressure induction, thereby resulting in concerns regarding their durability and reliability. Herein, for the first time, we demonstrate a novel method for achieving solvent-responsive, reversible switching, and robust EMI shielding capabilities using a controlled proton-reservoir ordered gel. The gel contains polyaniline (PANI) and sodium alginate (SA). Initially, SA acts as a proton reservoir for PANI in an aqueous system, enhancing the doping level of PANI and improving its electrical conductivity. Additionally, PANI and SA chains respond to diverse polar solvents, such as water, acetonitrile, ethanol, n-hexane, and air, inducing distinct conformations that affect the degree of PANI conjugation and electron migration along the chains. This process is reversible and non-destructive to the polymer chain, ensuring the effective and uncompromised performance of the EMI shielding switch. We can achieve precise and reversible tuning (on/off) of EMI shielding with different effectiveness levels by manipulating the solvents within the framework. This work opens a new solvent-stimuli avenue for the development of EMI shielding materials with reliable and intelligent on/off switching capabilities.
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Affiliation(s)
- Yan-Qin Wang
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Min Cao
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Bo-Wen Liu
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Fu-Rong Zeng
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Qiang Fu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu 610065, China
| | - Hai-Bo Zhao
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
| | - Yu-Zhong Wang
- Collaborative Innovation Center for Eco-Friendly and Fire-Safety Polymeric Materials (MoE), State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory for Eco-Friendly Polymer Materials (Sichuan), College of Chemistry, Sichuan University, Chengdu, 610064, China.
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