npj Flexible Electronics
·
2024
·Vol. 8
·期 1
·1-10
·
IF 12.3
Wang Zijian,Yu Wen,Gao Chaochao,Zhu Zhenye,Zhang Jiaheng
Fabricating high-conductive composites and constructing highly conductive networks are crucial for high-performance electrothermal film. In this study, an Ag nanowires/graphene (Ag/G) composite synthesized by liquid-phase exfoliation and in-situ photoreduction is mixed with carbon black (CB) to form a composite conductive ink, and a CB/Ag/G composite electrothermal film with a point-line-plane three-dimensional microstructure is obtained via blade coating process. Both the addition of Ag nanowires and a subsequent compression rolling treatment induce the establishment of the effective conductive network in the film, endowing it with an outstanding conductivity of 399.4 S cm −1 . The film reaches a T s of 204 °C with an input voltage of 3.0 V, and is successfully applied in water heating and de-icing, demonstrating its extraordinary electrothermal performance and vast potential for practical applications. The film is also used as an electromagnetic shielding film and heat dissipation substrate, showing exceptional electromagnetic shielding (42.5 dB) and heat dissipation properties.
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
COMPOSITES SCIENCE AND TECHNOLOGY
·
2021
·
IF 8.528
Junjie Ma,Huilei Jiang,Shujie Hu,Jinwei Song,Xuanhe Zhang,Te Hu,Huijian Ye,Lixin Xu
Based on the Joule heat effect, graphene can transfer electrical into heat energy with fast response times and high efficiencies. Despite intensive researches, facile strategies for preparing polymer-based graphene electrothermal materials remain highly desirable. We herein report a strategy for preparing poly (tetra fluoroethylene) (PTFE)-supported high-performance hybrid electrothermal films from liquid-phase exfoliated graphene by combining with multi-walled carbon nanotubes (MWCNTs). The graphene and MWCNT dispersions can be obtained by sonicating graphite and MWCNTs, respectively, in chloroform with an ultraviolet (UV) light reactive dendritic polymer , HBPE@Py@Acryl, as stabilizer . Further, a series of PTFE-supported, UV cross-linked graphene/MWCNT hybrid films were successfully prepared from the dispersions by vacuum filtration and UV irradiation. It is found that the existence of MWCNTs in the films results in porous structure , making the hybrid films denser than the single graphene system. Meanwhile, the MWCNTs can effectively bridge graphene nanosheets to form perfect hybrid networks, jointly imparting the films with significantly enhanced electrothermal performance. In addition, the UV crosslinking of the HBPE@Py@Acryl adsorbed on the graphene and MWCNT surfaces makes the films exhibit excellent service stability. As an example, after being alternately folded 1800 times or scraped for 90 cycles, the film with 20% MWCNTs remains exhibiting stable, well controllable electrothermal performance. This research provides a guideline for producing high-performance polymer-based graphene electrothermal materials, potentially useful in wearable devices and intelligent actuators, from liquid-phase exfoliated graphene through simple process.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2024
·Vol. 53
·期 7
·3490-3502
·
IF 2.2
Shao Zhongjie,Liu Yaning,Yang Da,Li Longfei,Xia Yang,Zhang Lihui,Tong Bo,Wang Bingjia,Zhao Yong,Xiao Zhen
Carbon-based conductive polymer composites (CPCs) have significant potential for fabricating low-cost and high-performance flexible electric heating films in deicing applications. However, the inferior high-temperature resistance and low heating power density seriously restrict their large-scale commercial application. Herein, a series of polyimide (PI)/carbon black (CB) composite electrothermal films with excellent high-temperature stability and high-power density are prepared by a simple slurry coating method. With successfully introducing the high-temperature resistance and high mechanical strength PI as polymer matrix, the PI/CB composite electrothermal films with a low percolation threshold of 10.8% have a broad operating temperature ranging from 40°C to 270°C under low applied voltages (< 60 V) at room temperature. Impressively, these PI/CB composite electrothermal films with a uniform thin thickness of 45 μm exhibit high operating temperature (> 200°C), rapid heating response speed (< 10 s), remarkable long-term working stability, and superior low-temperature operating reliability even at −30°C. The simulated deicing experiment indicates that the PI/CB composite electrothermal film dislodges an ice cube (thickness = 10 mm) within 280 s. This work not only provides a universal strategy for the design and fabrication of high-operating-temperature CPCs, but also verifies the great potential for use in deicing applications. Graphical Abstract
研究领域:
材料科学
·
高分子化学
·
能源材料
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Jing-Qi Wang,Tian-Jiao Lou,Tao Wang,Weiwei Cao,Hui Zhao,Peng-Fei Qian,Ze-Long Bao,Xiao-Tong Yuan,Hong-Zhang Geng
Carbon nanomaterials are ideal fillers in composites for electrothermal applications due to their ultrahigh electrical conductivity, thermal conductivity, and excellent mechanical property. In this study, high-performance electrothermal laminate films were prepared by a layer-by-layer process, which used tannic acid-functionalized multiwalled carbon nanotubes as filler and thermoplastic polyurethane as substrate. The prepared electrothermal laminate films exhibit excellent mechanical property, electrical heating property, and high electrothermal performance, which can reach steady-state temperature in about 120 s. Additionally, the maximum steady-state temperature can reach ∼150 °C at 20 V. During 10 different cycles of experiments and 5 h aging time, no significant change in temperature was observed. Moreover, from the results, it is clear that the performance of the samples is related to the amount of filler added and the applied voltage, and we can precisely control the sample performance by regulating the amount of filler addition and applied voltage. We believe that these electrothermal laminate films could be widely used in wearable heating cotton fabric, controllable electric heating module, floor heating, and deicing devices.
研究领域:
材料科学
·
纳米技术
✓ 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）