1
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Du Y, Zhang H, Zou L, Li X, Lv X, Ye J, Deng K, Tian W, Ji J. Manipulating 2D Membrane Interlayer Channels with Accelerated Mass-Transfer Behavior to Boost Solar Desalination. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2402105. [PMID: 38727184 DOI: 10.1002/smll.202402105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 04/30/2024] [Indexed: 10/01/2024]
Abstract
The scarcity of fresh water necessitates sustainable and efficient water desalination strategies. Solar-driven steam generation (SSG), which employs solar energy for water evaporation, has emerged as a promising approach. Graphene oxide (GO)-based membranes possess advantages like capillary action and Marangoni effect, but their stacking defects and dead zones of flexible flakes hinders efficient water transportation, thus the evaporation rate lag behind unobstructed-porous 3D evaporators. Therefore, fundamental mass-transfer approach for optimizing SSG evaporators offers new horizons. Herein, a universal multi-force-fields-based method is presented to regularize membrane channels, which can mechanically eliminate inherent interlayer stackings and defects. Both characterization and simulation demonstrate the effectiveness of this approach across different scales and explain the intrinsic mechanism of mass-transfer enhancement. When combined with a structurally optimized substrate, the 4Laponite@GO-1 achieves evaporation rate of 2.782 kg m-2 h-1 with 94.48% evaporation efficiency, which is comparable with most 3D evaporators. Moreover, the optimized membrane exhibits excellent cycling stability (10 days) and tolerance to extreme conditions (pH 1-14, salinity 1%-15%), verifies the robust structural stability of regularized channels. This optimization strategy provides simple but efficient way to enhance the SSG performance of GO-based membranes, facilitating their extensive application in sustainable water purification technologies.
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Affiliation(s)
- Yuping Du
- School of Chemical Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - He Zhang
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, P. R. China
| | - Lie Zou
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, P. R. China
| | - Xiaoke Li
- College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu, 610059, P. R. China
| | - Xingbin Lv
- College of Chemistry and Environment, Southwest Minzu University, Chengdu, Sichuan, 610041, P. R. China
| | - Jiahui Ye
- School of Chemical Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Kuan Deng
- School of Chemical Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Wen Tian
- School of Chemical Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
| | - Junyi Ji
- School of Chemical Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, P. R. China
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2
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Xu X, Li Z, Li H, Li Y, Zeng Y, Liu S. Improved-quality graphene films via the synergism of large nanosheet aligning and nanotube bridging for flexible supercapacitors. NANOTECHNOLOGY 2024; 35:455202. [PMID: 39053495 DOI: 10.1088/1361-6528/ad6774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 07/25/2024] [Indexed: 07/27/2024]
Abstract
Scalable production of reduced graphene oxide (rGO) films with high mechanical-electrical properties is desirable as these films are candidates for wearable electronics devices and energy storage applications. Removing structural incompleteness such as wrinkles or voids in the graphene films, which are generated from the assembly process, would greatly optimize their mechanical properties. However, the densely stacked graphene sheets in the films degrade their ionic kinetics and thus limit their development. Here, a horizontal-longitudinal-structure modulating strategy is demonstrated to produce enhanced mechanical, conductive, and capacitive graphene films. Typically, two-dimensional large graphene sheets (LGS) induce regular stacking of graphene oxide (GO) during the assembly process to reduce wrinkles, while one-dimensional single-walled carbon nanotubes (SWCNT) bridge with graphene sheets to strengthen the multidirectional intercalation and reduce GO layer restacking. The simultaneous incorporation of LGS and SWCNT synergistically creates a fine microstructure by improving the alignment of graphene sheets, increasing continuous conductive pathways to facilitate electron transport, and enlarging interlayer spacing to promote electrolyte ion diffusion. As a result, the obtained graphene films are flat and exhibit signally reinforced mechanical properties, electrical conductivity (38727 S m-1), as well as specific capacitance (232 F g-1) as supercapacitor electrodes compared to those of original rGO films. Moreover, owing to the comprehensive improved properties, a flexible gel supercapacitor assembled by the graphene film-based electrodes shows high energy density, good flexibility, and excellent cycling stability (93.8% capacitance retention after 10 000 cycles). This work provides a general strategy to manufacture robust graphene structural materials for energy storage applications in flexible and wearable electronics.
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Affiliation(s)
- Xuan Xu
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
| | - Zhenhu Li
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
| | - Haoxiang Li
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
| | - Yongsu Li
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
| | - Yu Zeng
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
| | - Shuangyi Liu
- Research Center of Electrochemical Energy Storage Technologies, Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, People's Republic of China
- Chongqing School, University of Chinese Academy of Sciences, Chongqing 400714, People's Republic of China
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Wu J, Zhu C, Morikawa H, Zhang X, Yin X, Yu J, Zhang S, Ding B. A Breathable Fibrous Membrane with Coaxially Heterogeneous Conductive Networks toward Personal Thermal Management and Electromagnetic Interference Shielding. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2311827. [PMID: 38381114 DOI: 10.1002/smll.202311827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 01/30/2024] [Indexed: 02/22/2024]
Abstract
The expeditious growth of wearable electronic devices has boomed the development of versatile smart textiles for personal health-related applications. In practice, integrated high-performance systems still face challenges of compromised breathability, high cost, and complicated manufacturing processes. Herein, a breathable fibrous membrane with dual-driven heating and electromagnetic interference (EMI) shielding performance is developed through a facile process of electrospinning followed by targeted conformal deposition. The approach constructs a robust hierarchically coaxial heterostructure consisting of elastic polymers as supportive "core" and dual-conductive components of polypyrrole and copper sulfide (CuS) nanosheets as continuous "sheath" at the fiber level. The CuS nanosheets with metal-like electrical conductivity demonstrate the promising potential to substitute the expensive conductive nano-materials with a complex fabricating process. The as-prepared fibrous membrane exhibits high electrical conductivity (70.38 S cm-1), exceptional active heating effects, including solar heating (saturation temperature of 69.7 °C at 1 sun) and Joule heating (75.2 °C at 2.9 V), and impressive EMI shielding performance (50.11 dB in the X-band), coupled with favorable air permeability (161.4 mm s-1 at 200 Pa) and efficient water vapor transmittance (118.9 g m-2 h). This work opens up a new avenue to fabricate versatile wearable devices for personal thermal management and health protection.
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Affiliation(s)
- Jiajia Wu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
- Faculty of Textile Science and Technology, Institute for Fiber Engineering, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567, Japan
| | - Chunhong Zhu
- Faculty of Textile Science and Technology, Institute for Fiber Engineering, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567, Japan
| | - Hideaki Morikawa
- Faculty of Textile Science and Technology, Institute for Fiber Engineering, Shinshu University, 3-15-1, Tokida, Ueda, Nagano, 386-8567, Japan
| | - Xinxin Zhang
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Xia Yin
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Jianyong Yu
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Shichao Zhang
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
| | - Bin Ding
- Innovation Center for Textile Science and Technology, Donghua University, Shanghai, 201620, China
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4
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Wu Y, An C, Guo Y, Zong Y, Jiang N, Zheng Q, Yu ZZ. Highly Aligned Graphene Aerogels for Multifunctional Composites. NANO-MICRO LETTERS 2024; 16:118. [PMID: 38361077 PMCID: PMC10869679 DOI: 10.1007/s40820-024-01357-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/03/2024] [Indexed: 02/17/2024]
Abstract
Stemming from the unique in-plane honeycomb lattice structure and the sp2 hybridized carbon atoms bonded by exceptionally strong carbon-carbon bonds, graphene exhibits remarkable anisotropic electrical, mechanical, and thermal properties. To maximize the utilization of graphene's in-plane properties, pre-constructed and aligned structures, such as oriented aerogels, films, and fibers, have been designed. The unique combination of aligned structure, high surface area, excellent electrical conductivity, mechanical stability, thermal conductivity, and porous nature of highly aligned graphene aerogels allows for tailored and enhanced performance in specific directions, enabling advancements in diverse fields. This review provides a comprehensive overview of recent advances in highly aligned graphene aerogels and their composites. It highlights the fabrication methods of aligned graphene aerogels and the optimization of alignment which can be estimated both qualitatively and quantitatively. The oriented scaffolds endow graphene aerogels and their composites with anisotropic properties, showing enhanced electrical, mechanical, and thermal properties along the alignment at the sacrifice of the perpendicular direction. This review showcases remarkable properties and applications of aligned graphene aerogels and their composites, such as their suitability for electronics, environmental applications, thermal management, and energy storage. Challenges and potential opportunities are proposed to offer new insights into prospects of this material.
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Affiliation(s)
- Ying Wu
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China.
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang, 110004, People's Republic of China.
| | - Chao An
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang, 110004, People's Republic of China
| | - Yaru Guo
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang, 110004, People's Republic of China
| | - Yangyang Zong
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang, 110004, People's Republic of China
| | - Naisheng Jiang
- Beijing Advanced Innovation Center for Materials Genome Engineering, School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, People's Republic of China
- Institute of Materials Intelligent Technology, Liaoning Academy of Materials, Shenyang, 110004, People's Republic of China
| | - Qingbin Zheng
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, Shenzhen, Guangdong, 518172, People's Republic of China.
| | - Zhong-Zhen Yu
- State Key Laboratory of Organic-Inorganic Composites, College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, People's Republic of China.
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5
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Luo S, Li Q, Xue Y, Zhou B, Feng Y, Liu C. Reinforcing and toughening bacterial cellulose/MXene films assisted by interfacial multiple cross-linking for electromagnetic interference shielding and photothermal response. J Colloid Interface Sci 2023; 652:1645-1652. [PMID: 37666196 DOI: 10.1016/j.jcis.2023.08.177] [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: 07/06/2023] [Revised: 08/24/2023] [Accepted: 08/28/2023] [Indexed: 09/06/2023]
Abstract
Ultrathin MXene composite films, with their flexibility, metal-level conductivity, and multifunction compatibility, are an ideal choice for electromagnetic interference (EMI) shielding materials in future developments. Nonetheless, the dilemma between electrical conductivity and robustness in these composite films remains a challenge. Herein, an ammonium polyphosphate (APP) assisted interfacial multiple cross-linking strategy, achieved via simple solution blending and filtration, was employed to reinforce and toughen the "brick-mortar" layered MXene/bacterial cellulose (MBCA) films without compromising their conductivity and EMI shielding ability. The introduction of a small amount of APP leads to multiple interfacial interactions between MXene and bacterial cellulose, resulting in significant enhancements in mechanical strength (360.8 MPa), Young's modulus (2.8 GPa), fracture strain (17.3%), and toughness (34.1 MJ/m3). Concurrently, the MBCA film displayed satisfactory conductivity values of 306.7 S/cm and an EMI SE value of 41 dB upon optimizing the MXene content. Additionally, the MBCA film demonstrated a consistent, rapid-response photothermal conversion capability, achieving a photothermal conversion temperature of 97 °C under a light intensity of 200 mW/m2. Consequently, this tough and multifunctional EMI shielding film holds substantial promise for protecting electronic equipment.
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Affiliation(s)
- Shilu Luo
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China
| | - Qi Li
- Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 JieFang Avenue, Wuhan 430022, China
| | - Yajun Xue
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China
| | - Bing Zhou
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.
| | - Yuezhan Feng
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China.
| | - Chuntai Liu
- Key Laboratory of Materials Processing and Mold Ministry of Education, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou 450002, China
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6
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Duan R, Zhou J, Ma X, Hao J, Zhao D, Teng C, Zhou Y, Jiang L. High Strength MXene/PBONF Heterogeneous Membrane with Excellent Ion Selectivity for Efficient Osmotic Energy Conversion. NANO LETTERS 2023. [PMID: 38032845 DOI: 10.1021/acs.nanolett.3c03343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2023]
Abstract
Layered MXene nanofluidic membranes still face the problems of low mechanical property, poor ion selectivity, and low output power density. In this work, we successfully constructed heterostructured membranes with the combination of the layered channels of the MXene layer on the top and the nanoscale poly(p-phenylene-benzodioxazole) nanofiber (PBONF) layer on the bottom through a stepwise filtration method. The as-prepared MXene/PBONF-50 heterogeneous membrane exhibits high mechanical properties (strength of 221.6 MPa, strain of 3.2%), high ion selectivity of 0.87, and an excellent output power density of 15.7 W/m2 at 50-fold concentration gradient. Excitingly, the heterogeneous membrane presents a high power density of 6.8 W/m2 at a larger testing area of 0.79 mm2 and long-term stability. This heterogeneous membrane construction provides a viable strategy for the enhancement of mechanical properties and osmotic energy conversion of 2D materials.
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Affiliation(s)
- Runyu Duan
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Jiale Zhou
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Xiaoyan Ma
- College of Chemical Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Junran Hao
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Danying Zhao
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
| | - Chao Teng
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Yahong Zhou
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
- Binzhou Institute of Technology, Weiqiao-UCAS Science and Technology Park, Binzhou City, Shandong Province 256606, China
| | - Lei Jiang
- Key Laboratory of Bio-inspired Materials and Interfacial Science, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China
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7
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Ruan K, Shi X, Zhang Y, Guo Y, Zhong X, Gu J. Electric-Field-Induced Alignment of Functionalized Carbon Nanotubes Inside Thermally Conductive Liquid Crystalline Polyimide Composite Films. Angew Chem Int Ed Engl 2023; 62:e202309010. [PMID: 37548313 DOI: 10.1002/anie.202309010] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 08/06/2023] [Accepted: 08/07/2023] [Indexed: 08/08/2023]
Abstract
The positive liquid crystals, 4'-heptyl-4-biphenylcarbonitrile (7CB), are used to functionalize carbon nanotubes (LC-CNT), which can be aligned in the liquid crystalline polyimide (LC-PI) matrix under an alternating electric field to fabricate the thermally conductive LC-CNT/LC-PI composite films. The efficient establishment of thermal conduction pathways in thermally conductive LC-CNT/LC-PI composite films with a low amount of LC-CNT is achieved through the oriented alignment of LC-CNT within the LC-PI matrix. When the mass fraction of LC-CNT is 15 wt %, the in-plane thermal conductivity coefficient (λ∥ ) and the through-plane thermal conductivity coefficient (λ⊥ ) of the LC-CNT/LC-PI composite films reach 4.02 W/(m ⋅ K) and 0.55 W/(m⋅K), which are 90.5 % and 71.9 % higher than those of the intrinsically thermally conductive LC-PI films respectively, also 28.8 % and 5.8 % higher than those of the CNT/LC-PI composite films respectively. Meanwhile, the thermally conductive LC-CNT/LC-PI composite films also possess excellent mechanical and heat resistance properties. The Young's modulus and the heat resistance index are 2.3 GPa and 297.7 °C, respectively, which are higher than the intrinsically thermally conductive LC-PI films and the thermally conductive CNT/LC-PI composite films under the same amount of CNT.
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Affiliation(s)
- Kunpeng Ruan
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
| | - Xuetao Shi
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
- Chongqing Innovation Center, Northwestern Polytechnical University, 401135, Chongqing, P. R. China
| | - Yali Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
| | - Yongqiang Guo
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
- School of Chemistry, Beihang University, 100191, Beijing, P. R. China
| | - Xiao Zhong
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
| | - Junwei Gu
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University 710072 Xi'an, Shaanxi, P. R. China
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8
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Liang C, Qiu H, Zhang Y, Liu Y, Gu J. External field-assisted techniques for polymer matrix composites with electromagnetic interference shielding. Sci Bull (Beijing) 2023; 68:1938-1953. [PMID: 37541794 DOI: 10.1016/j.scib.2023.07.046] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/14/2023] [Accepted: 07/21/2023] [Indexed: 08/06/2023]
Abstract
The rapid development of mobile devices has greatly improved the lives of people, but they have also caused problems with electromagnetic interference (EMI) and information security. Therefore, there is an urgent need to develop high performance EMI shielding materials to suppress electromagnetic radiation and prevent information leakage. Some reports point out that the self-orientation behavior of fillers under external forces contributes to the improvement of EMI shielding performance. So how to construct an effective filler orientation structure in the polymer matrix is becoming a hot topic in the research of EMI shielding materials. In view of the fact that there are few reports on the preparation of polymer matrix EMI shielding composites by external field induction, from this perspective, we first highly focus on strategies for the construction of conductive networks within composites based on external field induction. Subsequently, the research progress on the preparation of polymer matrix EMI shielding composites by inducing the orientation of inorganic fillers through external fields, including temperature, electrostatic, gravity, mechanical force and magnetic fields, is organized and sorted out in detail. Notably, the particular response relationship between the unique composite structures prepared by external field induction and the incident electromagnetic waves is further dissected. Finally, the key scientific problems that need to be solved in the preparation of polymer matrix EMI shielding composites assisted by external fields are proposed. The approach discussed and the strategies proposed are expected to provide some guidance for the innovative design of high-performance polymer matrix EMI shielding composites.
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Affiliation(s)
- Chaobo Liang
- Shanxi Key Laboratory of Nano Functional Composites, School of Materials Science and Engineering, North University of China, Taiyuan 030051, China; Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Hua Qiu
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yali Zhang
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China
| | - Yaqing Liu
- Shanxi Key Laboratory of Nano Functional Composites, School of Materials Science and Engineering, North University of China, Taiyuan 030051, China.
| | - Junwei Gu
- Shaanxi Key Laboratory of Macromolecular Science and Technology, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
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9
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Zhang H, Zhang Y, Li J, Ma Z. Advantages of Structure and Electrochemical Properties of Graphene Prepared from Tectonically Deformed Coal. ACS OMEGA 2023; 8:25142-25154. [PMID: 37483208 PMCID: PMC10357454 DOI: 10.1021/acsomega.3c02073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 06/22/2023] [Indexed: 07/25/2023]
Abstract
Asa low-cost carbon-rich resource, coal has been widely used to prepare excellent electrochemical energy-storage carbon materials such as graphene. However, the different structures of carbon source will affect the performance of carbon materials. To explore the feasibility of preparing high-performance graphene from the carbon source affected by tectonic stress in coal, in this paper, series products of coal-based graphene are prepared by tectonically deformed coal (TDC) and normal structural coal (NSC). The structural parameters are characterized by HRTEM, XRD, Raman, and low-temperature CO2 and N2 adsorption, and the electrochemical performance of coal-based graphene lithium battery is tested by galvanostatic charge-discharge and cyclic voltammetry. The results show that tectonic stress makes the proportion of the medium-long aromatic fringes, preferred orientation degree (POD), and multilayer stacking in TDC aromatic fringes slightly higher than those in NSC. At the same temperature, the relatively large microcrystalline size, the high order degree, and more pore structures make the local molecular oriented (LMO) domain vertical height (d) and graphitization degree (G) of the coal-based graphite microcrystalline structure prepared by TDC better than those of NSC, which indicates that the carbon source in TDC contains more graphitizable carbon structures. This makes the graphene prepared by TDC not only possess perfectly ordered crystal planes but also relatively abundant nanochannels. High lithium-storage capacity and low charge-transfer resistance make the electrochemical performance of graphene prepared by TDC as an anode electrode material for lithium-ion batteries superior to that by NSC.
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Affiliation(s)
- Hang Zhang
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo 454003, P.R. China
| | - Yugui Zhang
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo 454003, P.R. China
- State
Key Laboratory Cultivation Base for Gas Geology and Gas Control of
Henan Province, Jiaozuo 454003, P.R. China
| | - Jian Li
- School
of Safety Science and Engineering, Henan
Polytechnic University, Jiaozuo 454003, P.R. China
| | - Zhangnan Ma
- School
of Chemistry and Chemical Engineering, Henan
Polytechnic University, Jiaozuo 454003, P.R. China
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10
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Li L, Yuan X, Zhai H, Zhang Y, Ma L, Wei Q, Xu Y, Wang G. Flexible and Ultrathin Graphene/Aramid Nanofiber Carbonizing Films with Nacre-like Structures for Heat-Conducting Electromagnetic Wave Shielding/Absorption. ACS APPLIED MATERIALS & INTERFACES 2023; 15:15872-15883. [PMID: 36940091 DOI: 10.1021/acsami.3c00249] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Electromagnetic interference (EMI) shielding and electromagnetic wave absorption (EWA) materials with good thermal management and flexibility properties are urgently needed to meet the more complex modern service environment, especially in the field of smart wearable electronics. How to balance the relation of electromagnetic performance, thermal management, flexibility, and thickness in material design is a crucial challenge. Herein, graphene nanosheets/aramid nanofiber (C-GNS/ANF) carbonizing films with nacre-like structures were fabricated via the blade-coating/carbonization procedure. The ingenious configuration from highly ordered alignment GNS interactively connected by a carbonized ANF network can effectively improve the thermal/electrical conductivity of a C-GNS/ANF film. Specifically, the ultrathin C-GNS/ANF film with a thickness of 17 μm shows excellent in-plane thermal conductivity (TC) of 79.26 W m-1 K-1 and superior EMI shielding up to 56.30 dB. Moreover, the obtained C-GNS/ANF film can be used as a lightweight microwave absorber, achieving excellent microwave absorption performance with a minimum reflection loss of -56.07 dB at a thickness of 1.5 mm and a maximum effective absorption bandwidth of 5.28 GHz at an addition of only 5 wt %. Furthermore, the C-GNS/ANF films demonstrate good flexibility, outstanding thermal stability, and flame retardant properties. Overall, this work indicates a prospective direction for the development of the next generation of electromagnetic wave absorption/shielding materials with high-performance heat conduction.
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Affiliation(s)
- Liang Li
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Material Science and Engineering, Hainan University, Haikou 570228, Hainan, China
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Xiang Yuan
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Material Science and Engineering, Hainan University, Haikou 570228, Hainan, China
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Haoxiang Zhai
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Material Science and Engineering, Hainan University, Haikou 570228, Hainan, China
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Ying Zhang
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Lingling Ma
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Qiyi Wei
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Yang Xu
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
| | - Guizhen Wang
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Material Science and Engineering, Hainan University, Haikou 570228, Hainan, China
- Collaborative Innovation Center of Ecological Civilization, Hainan University, Haikou 570228, Hainan, China
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Chen Q, Wang Z, Jin H, Zhao X, Feng H, Li P, He D. Compressed Graphene Assembled Film with Tunable Electrical Conductivity. MATERIALS (BASEL, SWITZERLAND) 2023; 16:526. [PMID: 36676263 PMCID: PMC9863763 DOI: 10.3390/ma16020526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Revised: 12/27/2022] [Accepted: 01/03/2023] [Indexed: 06/17/2023]
Abstract
Graphene and graphene-based materials gifted with high electrical conductivity are potential alternatives in various related fields. However, the electrical conductivity of the macro-graphene materials is much lower than their metal counterparts. Herein, we improved the electrical conductivity of reduced graphene oxide (rGO) based graphene assembled films (GAFs) by applying a series of compressive stress and systematically investigated the relationship between the compressive stress and the electrical conductivity. The result indicates that with increasing applied compressive stress, the sheet resistance increased as well, while the thickness decreased. Under the combined effect of these two competing factors, the number of charge carriers per unit volume increased dramatically, and the conductivity of compressed GAFs (c-GAFs) showed an initial increasing trend as we applied higher pressure and reached a maximum of 5.37 × 105 S/m at the optimal stress of 450 MPa with a subsequent decrease with stress at 550 MPa. Furthermore, the c-GAFs were fabricated into strain sensors and showed better stability and sensitivity compared with GAF-based sensors. This work revealed the mechanism of the tunable conductivity and presented a facile and universal method for improving the electrical conductivity of macro-graphene materials in a controllable manner and proved the potential applications of such materials in flexible electronics like antennas, sensors, and wearable devices.
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Affiliation(s)
- Qiang Chen
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Zhe Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
| | - Huihui Jin
- School of Information Engineering, Wuhan University of Technology, Wuhan 430070, China
| | - Xin Zhao
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Hao Feng
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Peng Li
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
| | - Daping He
- Hubei Engineering Research Center of RF-Microwave Technology and Application, Wuhan University of Technology, Wuhan 430070, China
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