JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Bai Jiang,Na Li,Yan Wang,Zuming Hu,Jing Zhu,Junrong Yu
In order to deal with the more complex electromagnetic radiation environment, there is highly desirable to manufacture a high-performance electromagnetic shielding material with excellent electromagnetic shielding efficiency, flexibility, thermal properties, fatigue resistance , and other qualities. In this paper, we fabricated an ultralight, flexible, and heat-resistant poly-m-phenylene isophthalamide (PMIA)/Ag nanowires(AgNWs)/Ni composite nanofiber film via electrospinning, spray coating, and electroless plating . Compared with different AgNWs spraying contents, the highest electromagnetic shielding effectiveness, about 96 dB with a thickness of ∼150 µm, is generated by spraying 33.333 mg/cm 2 AgNWs suspension. Additionally, because of the benefit of the PMIA, this PMIA/AgNW/Ni composite membrane maintains a constant EMI SE value (over 90 dB) after a high-temperature process under 200 °C, which only decreases by 3.33 %. The excellent performance of the material is due to its large porosity and sandwich structure, which can dissipate electromagnetic waves within the material, with only a very small portion of the electromagnetic waves passing through it. Therefore, this material has a potential application for use in diverse harsh settings.
研究领域:
材料科学
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纳米技术
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 19
·9797-9805
·
IF 11.301
Junhui Tang,Ruisi Chen,Lidong Chen,Guillermo C. Bazan,Ziqi Liang
n-Type semiconducting polymers bearing high Seebeck coefficients (S) have been seldom employed in organic–inorganic thermoelectric nanocomposites (TENCs). Herein we illustrate how to exploit an n-type semiconducting polymer to fabricate TENCs comprising N2200 and metallic Co NWs, in which N2200 contributes significantly to the S of the TENCs. The TENCs exhibit a highest power factor (PF) of 288 μW m−1 K−2 at 80 wt% Co NWs. At a greater Co NW content, the organic/inorganic inter-connectivity deteriorates, owing to the rigid molecular chains of N2200, retarding the increase of electrical conductivity (σ) and also undermining the mechanical flexibility. Flexible n-type doped SWCNTs were therefore added to introduce additional conductive paths. At an optimal amount of SWCNTs (2 wt%), the σ increases to 1860 S cm−1, whereas S remains at approximately −45 μV K−1 and the bendability is improved. The maximal PF and zT values of the resulting ternary TENC reach 483 μW m−1 K−2 and 0.18 at 380 K, respectively. By pairing with p-type PEDOT:PSS/SWCNT thin films, the 6-legged flexible TEG yields maximum output voltage and power of 9.80 mV and 3.72 μW, respectively, when ΔT = 50 K. This work manifests a new avenue to both highly efficient and bendable thermoelectric materials through the judicious choice of multiple blend components.
研究领域:
材料科学
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能源技术
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高分子化学
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产品关联
DOI
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 2
·1-11
·
IF 5.3
Li Kaiwei,Jiang Han,Wang Liying,Wang Rui,Zhang Xuewei,Yang Libin,Jiang Xin,Song Wei,Zhao Bing
Semiconductor materials have become a competitive candidate for surface-enhanced Raman scattering (SERS) substrate. However, powdered semiconductors are difficult to execute a fast in situ detection for trace analytes. Here, we developed a new flexible semiconductor SERS substrate by in situ densely growing anatase TiO 2 nanoparticles on the surface of cotton fabric through a filtration-hydrothermal method, in which TiO 2 exhibits excellent controllability in size and distribution by regulating the ratio of water to alcohol in synthesis and the number of filtration-hydrothermal repetitive cycle. Cotton fabric/TiO 2 (Cot/TiO 2 ) substrate exhibits a high SERS activity and excellent spectral repeatability. The developed substrate has an ultra-high stability that can withstand long-term preservation; it can even resist the corrosions of strong acid and alkali, as well as high temperature up to 100 °C and low temperature down to − 20 °C. The flexible substrate can be used to carry out a rapid in situ detection for quinolone antibiotic (enrofloxacin and enoxacin) residues on the fish body surface by using a simple swabbing method, with high quantitative detection potential (up to an order of magnitude of 10 −7 M), and even for the simultaneous detection of both drug residues. The flexible substrate also exhibits an excellent recyclability up to 6 recycles in the actual SERS detection. Graphical Abstract
研究领域:
材料科学
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分析化学
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环境科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Daoguang Bi,Yangyang Li,Yingbang Yao,Tao Tao,Bo Liang,Shengguo Lu
Flexible photothermal devices have been extensively explored in a wide range of fields in recent years. In this work, a flexible photothermal nanocomposite film based on Ti 2 O 3 -PVA has been demonstrated for converting sunlight into thermal energy. Ti 2 O 3 nanoparticles were surfaced-modified by four kinds of different surfactants (γ–aminopropyltriethoxy Silane , Hexadecyl Trimethyl Ammonium Bromide, Stearic Acid, Polysorbate-80), respectively, and then the nanocomposites were prepared by a simple solution casting method. The flexible composite shows strong sunlight absorption in a wide spectrum range (300 nm–2000 nm). Under illumination of 5 kW/m 2 simulated sunlight, the nanocomposite can be quickly heated up to 64.1 °C. The nanocomposite presented stable performances after tens of bending tests, indicating good flexibility. Our results show that the nanocomposite with Ti 2 O 3 nanoparticles modified with Stearic Acid exhibits the strongest light absorption capability and thus the best photothermal effect. This flexible composite material may have promising potentials in the applications of photothermal energy harvesting devices for wearable electronics, solar-driven steam generators, or seawater desalinators etc.
研究领域:
材料科学
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能源科学
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产品关联
DOI
高影响因子
ACS Nano
·
2020
·
IF 14.588
Yafang Zhuang,Kun Zheng,Xinyu Cao,Qingrui Fan,Gang Ye,Jiaxin Lu,Jingnan Zhang,Yongmei Ma
Achieving nanocomposites with simultaneous highly anisotropic thermal and electrical conductivities using carbon materials remains challenging as carbon material tends to form random networks in nanocomposites. Here, highly anisotropic and flexible graphene@naphthalenesulfonate (NS)/poly(vinyl alcohol) (GN/PVA) nanocomposites were fabricated using a layer-by-layer scraping method with flat graphene as the starting functional filler. NS acted as a bond bridge for linking the graphene (π–π interaction) and PVA (hydrogen bond). The results showed well-dispersed graphene in the nanocomposites while maintaining flat morphology with uniform in-plane orientation. The as-fabricated nanocomposites exhibited highly anisotropic thermal and electrical conductivities. The in-plane and out-of-plane thermal conductivities of the nanocomposite prepared with 10.0 wt % graphene reached 13.8 and 0.6 W m–1 K–1, and in-plane and out-of-plane electrical conductivities were 10–1 and 10–10 S cm–1, respectively. This indicated highly anisotropic thermal and electrical conductivities. Furthermore, the nanocomposites showed elevated flexibility and tensile strength from 42.0 MPa for pure PVA to 110.0 MPa for GN-5.0 wt %/PVA. In sum, the proposed strategy is effective for the preparation of nanocomposites with high flexibility, as well as superior anisotropic thermal and electrical conductivities.
研究领域:
材料科学
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纳米技术
✓ 已验证
DOI
高影响因子
Journal of Materials Science-Materials in Engineering
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2025
·Vol. 20
·期 1
·1-10
·
IF 0
Wang Ruoxi,Sun Rongke,Ren Yanmei,Ma Yanqing,Ma Lei
There is still limited research on the influence of polymer content in inorganic/organic materials on thermoelectric properties. In this study, we systematically investigated the influence of the content of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) in the Ag 2 Se nanowires/PEDOT:PSS (Ag 2 Se NWs/PEDOT:PSS) composite films on the thermoelectric properties. When the content of PEDOT:PSS is 1.54 wt%, the composite film achieved the highest power factor (PF) of ~ 2074.0 µW m −1 K −2 at room temperature. The maximum output power ( P max ) of the single-leg thermoelectric device based on the composite film is approximately 49.42 nW, and the maximum power density (PD max ) is 4.28 W m −2 at a temperature difference of 25 K. Furthermore, the film exhibits superior flexibility with 94.3% of the original performance retention after 2000 bending cycles around a rod with a diameter of 5 mm. This work provides valuable guidance for the design and fabrication of high-performance flexible inorganic/organic composite thermoelectric materials.
研究领域:
材料科学
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纳米技术
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能源转换
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高分子化学
✓ 已验证
产品关联
DOI
SmartMat
·
2023
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IF 20.4
Yushan Yang,Kaicong Chen,Yipeng Chen,Chao Wang,Baokang Dang,Yingying Li,Ming Liu,Qingfeng Sun
Combination of flexible multifunctional stealth technology properties such as electromagnetic (EM) and infrared (IR) stealth is crucial to the development of aerospace, military, and electronic fields, but the synthesis technology still has a significant challenge. Herein, we have successfully designed and synthesized highly flexible MXene@cellulose lamellae/borate ion (MXCB) sheets with strong high-temperature EM-IR bi-stealth through sequential bridging of hydrogen and covalent bonds. The resultant MXCB sheets display high conductivity and good mechanical features such as flexibility, stretchability, fatigue resistance, and ultrasonic damage. MXCB sheets have a high tensile strength of 795 MPa. Furthermore, MXCB sheets with different thicknesses indicate exceptional high-temperature thermal-camouflage characteristics. This reduces the radiation temperature of the target object (>300°C) to 100°C. The conductivity of MXCB sheet with 3 μm thickness is 6108 S/cm and the EM interference (EMI) shielding value is 39.74 dB. The normalized surface-specific EMI SE absolute shielding effectiveness (SSE/ t ) is as high as 39312.78 dB·cm 2 /g, which remained 99.39% even after 10,000 times repeated folding. These multifunctional ultrathin MXCB sheets can be arranged by vacuum-assisted induction to develop EM-IR bi-stealth sheet.
研究领域:
材料科学
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航空航天工程
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Xiangfei Kong,Baochun Cui,Yongkang Zhao,Jihui Yuan,Jianjuan Yuan,Jiale Chai,Yuliang Zhong,Bowen Xu
The film/coating with dual-mode of photothermal conversion (PC) and radiative cooling (RC) has limited heat storage capacity and cannot achieve continuous heating/cooling. Due to its high heat storage density, phase change material (PCM) can store heat/cold to continuously utilize thermal energy. Hence, this study prepares a novel flexible PCM with dual-mode of with PC and RC. The dual-mode PCM has an extremely high enthalpy of 208.7 J/g, and low thermal conductivity of 0.23 W/(m·K). In PC mode, the solar absorptivity reaches 0.94. In RC mode, the solar reflectance is 0.91, and the emissivity in atmospheric window is 0.92. The comparative experiments of dual-mode PCM and dual-mode melamine foam (MF) film were conducted to demonstrate superiority of radiation heating/cooling combined with PCM. In PC mode, the photothermal conversion efficiency of dual-mode PCM reached 90.5 %, while the photothermal conversion efficiency of dual-mode MF film was only 33.4 %. Moreover, under outdoor heating experiment with cover shield, the dual-mode PCM made its temperature always higher than ambient temperature at night, while the dual-mode MF film cannot. Even if the cover shield was removed, the dual-mode PCM still reduced the energy consumption by 4.0 % compared to the dual-mode MF film. Besides, in RC mode with cover shield, the dual-mode PCM achieved a peak temperature drop of 6.1 °C relative to the dual-mode MF film. In RC mode without cover shield, the dual-mode PCM achieved energy saving of 63.3 % compared with dual-mode MF film. In summary, the dual-mode PCM has more continuous heating/cooling performance than the dual-mode film, thereby achieving more significant energy saving.
研究领域:
材料科学
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能源工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Sensor Research
·
2023
·Vol. 2
·期 6
·2200086
·
IF 0
Si Wang,Bohao Liu,Xingdong Feng,Rui Pan,Yuanlingyun Cai,Renyan Zhang,Mingbo Pu,Xiaoliang Ma,Xiong Li,Huiling Tai,Xiangang Luo
High flexibility, porosity, and antibacterial activity are extremely desired for wearable health monitoring, which is beneficial to simultaneously promote wearing comfort and safety. In this study, an antibacterial nanofibers-based triboelectric generator (AN-TENG) composed of the flexible chitosan/polyvinylpyrrolidone modified with halloysite nanotubes (CTS/PVP/HNTs) nanofibers and cube-arrays structured Ecoflex film is proposed for simultaneously energy harvesting and self-powered human motion monitoring. The open-circuit voltage (280 V), short-circuit current (3.98 μA), and transferred charge (51 nC) of the CTS/PVP/HNTs nanofibers TENG at the optimal compound concentration are increased by 90.8%, 86.92%, and 96.2%, respectively, compared to the CTS/PVP nanofibers one (size: 3 cm × 3 cm, mechanical force: 10 N @1 Hz), revealing good real-time monitoring ability for human wrist, elbow, and finger motion. An antibacterial test is carried out to evaluate the antibacterial activity and the antibacterial rate of the nanofibers against Escherichia coli (ATCC 8739) and Staphylococcus aureus (ATCC 6538) based on the current national standard GB/T 31402–2015, indicating good antibacterial properties of the nanofibers. This research offers an ingenious strategy to establish an antibacterial nanofibers-based TENG for self-powered motion monitoring and energy harvesting and offers a new insight to improve the practical security of wearable electronic devices.
研究领域:
生物医学工程
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材料科学
·
电子器件
·
可穿戴设备
✓ 已验证
DOI
COMPOSITES SCIENCE AND TECHNOLOGY
·
2019
·
IF 6.309
Jia-Qi Luo,Sai Zhao,Hao-Bin Zhang,Zhiming Deng,Lulu Li,Zhong-Zhen Yu
The rapid popularity of portable and wearable electronics requires high-performance flexible electromagnetic interference (EMI) shielding materials to cope with increasingly severe electromagnetic wave pollution problems. To combine outstanding EMI shielding performance and excellent mechanical flexibility, we demonstrate an efficient vacuum-assisted filtration approach for the fabrication of flexible and highly conductive Ti 3 C 2 T x MXene/natural rubber (NR) nanocomposite films by constructing interconnected MXene networks in NR matrix. The electrostatic repulsion forces originated from the negative charges of MXene and NR latex enable the MXene sheets to selectively distribute at the interfaces of the NR particles, forming an interconnected network for efficient electron transport and load transfer at low MXene contents. The resultant nanocomposite with 6.71 vol% of MXene shows a superb electrical conductivity of 1400 S m −1 and an outstanding EMI shielding performance of 53.6 dB. Furthermore, the robust and three-dimensional MXene network provides significant reinforcement to the NR matrix, exhibiting obviously enhanced tensile strength and modulus by 700% and 15000% as compared to those of neat NR, respectively. The stable EMI shielding capability and stretchability under cyclic deformations make the high-performance MXene/NR nanocomposite films promise in next-generation flexible and foldable electronics.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materiomics
·
2020
·
IF 5.797
Qikai Li,Qing Zhou,Long Wen,Weishu Liu
Flexible polymer thermoelectric thin film attracts wide attentions because it is compatible with the wearable electronics and e-skin. Herein, we reported an enhanced thermoelectric power factor of PEDOT:PSS from around 1 μW m −1 K −2 to 117 μW m −1 K −2 and high substrate-free strain of 20% through synergistically tuning the ordering structure and the oxidation state. An ionic liquid (EMImTCM) was used to decouple the ionic interaction between PEDOT and PSS, rearranging the morphology of structure that significantly benefit the mechanical flexibility and the electrical conductivity. The addition of L-ascorbic acid was confirmed as effective dedoping additive of PEDOT polymer that changed the oxidation state and hence boosted the thermoelectric power factor without notable sacrifice of the mechanical flexibility. Moreover, the electrical conductivity of the corresponding film maintained electrically stable (Δ R/R 0 < 0.12%) under 1000 bending cycles which indicates the great bendability. Our work demonstrated the feasibility to controllably tailor the thermoelectric and mechanical performance of the PEDOT:PSS flexible polymer thermoelectric thin film.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2020
·Vol. 44
·期 17
·7042-7050
·
IF 3.288
Jingjing Yuan,Lin Wang,Bo Xu,Ping Wang,Jiugang Yuan,Yuanyuan Yu,Chao Deng,Qiang Wang
Silk fibroins (SFs) have many attractive properties; however, the practical applications of pure fibroin materials are severely restricted by their low elasticity. To improve flexibility of regenerated SF membranes, carboxyl-terminated polyethylene glycol (cPEG) was introduced into fibroin chains using 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (EDC) and N-hydroxysuccinimide (NHS). Subsequently, laccase-mediated graft polymerization of polypyrrole (PPy) onto the SF-g-cPEG membrane was performed to achieve electrical conductivity. The results implied that cPEG was successfully grafted onto the SF chains; the elongation at break of the SF-g-cPEG membrane increased by three times compared to that of the untreated one. Meanwhile, the introduced cPEG promoted the binding of pyrrole radical cations onto fibroin membrane, resulting in an efficient deposition of a PPy conductive layer during the laccase treatment. Conductivity of the membrane of SF-g-cPEG/PPy meets the standard of conductive materials even after 48 cycles of bending testing. In addition, the composite membrane has acceptable in vitro biocompatibility. The present work provides a novel alternative for fabrication of flexible and conductive SF biomaterials, which would expand the applications of fibroin materials in wearable electronics.
研究领域:
生物材料学
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高分子化学
·
酶工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）