Carbon Energy
·
2022
·Vol. 4
·期 6
·1214-1227
·
IF 21.556
Zhicong Hu,Yongjin Zou,Cuili Xiang,Lixian Sun,Fen Xu,Menghe Jiang,Sensen Yu
The leakage of organic phase change materials (OPCMs) at temperatures above their melting point severely limits their large-scale application. The introduction of porous supports has been identified as an efficient leakage-proofing method. In this study, a novel carbonized Cu-coated melamine foam (MF)/reduced graphene oxide (rGO) framework (MF/rGO/Cu-C) is constructed as a support for fabricating stabilized multifunctional OPCMs. MF serves as the supporting material, while rGO and Cu act as functional reinforcements. As a thermal energy storage material, polyethylene glycol (PEG) is encapsulated into MF/rGO/Cu-C through a vacuum-assisted impregnation method to obtain PEG@MF/rGO/Cu-C composite with excellent comprehensive performance. PEG@MF/rGO/Cu-C exhibits high phase change enthalpies of 148.3 J g −1 (melting) and 143.9 J g −1 (crystallization), corresponding to a high energy storage capability of 92.7%. Simultaneously, MF/rGO/Cu-C endues the composite with an enhanced thermal conductivity of 0.4621 W m −1 K −1 , which increases by 463% compared to that of PEG@MF. Furthermore, PEG@MF/rGO/Cu-C displays great light-to-thermal and electric-to-thermal conversion capabilities, thermal cycle stability, light-to-thermal cycle stability, and shape stability, showing promising application prospects in different aspects.
研究领域:
材料科学
·
能源工程
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Xuewei Luo,Lirong Luo,Xiaofeng Zhao,Huangyue Cai,Shuaishuai Duan,Chunhui Xu,Shuo Huang,Hongyun Jin,Shuen Hou
Emerging of high-entropy ceramics has brought new opportunities for designing and optimizing materials with desired properties. In the present work, high-entropy rare-earth zirconates (La 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 ) 2 Zr 2 O 7 and (Yb 0.2 Nd 0.2 Sm 0.2 Eu 0.2 Gd 0.2 ) 2 Zr 2 O 7 are designed and synthesized. Both high-entropy ceramics exhibit a single pyrochlore structure with excellent phase stability at 1600 °C. In addition, the Yb-containing system possesses a high coefficient of thermal expansion (10.52 × 10 −6 K -1 , RT∼1500 °C) and low thermal conductivity (1.003 W·m -1 K -1 , 1500 °C), as well as excellent sintering resistance. Particularly, the Yb-containing system has significantly improved fracture toughness (1.80 MPa·mm 1/2 ) when compared to that of lanthanum zirconate (1.38 MPa·mm 1/2 ), making it a promising material for thermal barrier coatings (TBCs) applications. The present work indicates that the high-entropy design can be applied for further optimization of the comprehensive properties of the TBCs materials.
研究领域:
材料科学
·
陶瓷工程
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DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 106
·期 4
·2476-2490
·
IF 4.186
Chenkai Qu,Lin Chen,Tao Su,Dongbo Li,Yuan Yang,Jing Feng
Ferroelastic YTaO 4 is a promising material for thermal barrier coatings (TBCs), and its thermal and mechanical properties can be further optimized by various methods. In this study, a ferroelastic middle-entropy ceramic Y 0.5 Gd 0.5 Ta 0.5 Nb 0.5 O 4 was synthesized by solid-phase sintering, and its microstructures and thermophysical properties were key points. We determined the contributions of phonons and photons to total thermal conductivity, and a low thermal conductivity was obtained by inhibiting high-temperature thermal radiation. The thermal expansion coefficients were improved by introducing of Nb atom into the lattice of the prepared middle-entropy ceramic, which meets the requirements of TBCs. The improved wear resistance originated from relatively high Young's modulus and the hardness of Y 0.5 Gd 0.5 Ta 0.5 Nb 0.5 O 4 , and it would contribute to the service performance of the corresponding coatings. This work motivates the engineering applications of ferroelastic RETaO 4 and RENbO 4 (RE is rare-earth element) as high-temperature TBCs.
研究领域:
材料科学
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热力学工程
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Sehreish Abrar,Zhuang Ma,Ling Liu,Faisal Nazeer,Abdul Malik
In this work, novel equiatomic high entropy (Dy 1/4 Ho 1/4 Tm 1/4 Yb 1/4 ) 2 Si 2 O 7 or (4RE 1/4 ) 2 Si 2 O 7 ceramic pyrosilicate was fabricated through a single solid solution method to use as environmental barrier coating. The SEM analysis of high entropy powders shows the homogenous mixing and XRD proves the formation of single β-phase after milling and sintering. The coefficient of thermal expansion was reported as (2.3–4.8 × 10 −6 K −1 ) from 400 K −1 to 1723 K −1 . The ultra-low thermal diffusivity (0.4 mm 2 s −1 ) and thermal conductivity (0.8 W/m°C) were reported at 1500 °C for this novel HE ceramic disilicate. The as fabricated (4RE 1/4 ) 2 Si 2 O 7 pyrosilicate shows an excellent CMAS resistant for even up to 48 h and negligible amount of Ca is able to penetrate in the substrate. Rare earth disilicate species with intermediate radii such as Tm 3+ helps in maintaining phase stability along with passive element Yb 3+ of smaller radii which also protect the interface from severe CMAS attack. However, the rare earth species with larger radii such as Dy 3+ and Ho 3+ actively take part in apatite formation leading to reduced corrosion activity of CMAS melt by changing its composition. This result confirms the application of (4RE 1/4 ) 2 Si 2 O 7 as a potential candidate to be used as protecting coating material in harsh combustion environments.
研究领域:
材料科学
·
高温材料
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DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2025
·
IF 7.3
Wenjing Xie,Jiajiu Liang,Guangtao Chang,Ruoxin Li
Driven by increasing global energy consumption, smart textiles for personal thermal management, offering energy saving and dynamic temperature regulation, have garnered significant attention. This study introduces an all-weather personal thermal management textile engineered with three-dimensional structured MXene nanosheets, achieving bidirectional temperature control through passive thermal insulation and active photothermal conversion. Fabricated by electrostatically adsorbing MXene nanosheets onto hollow, thermally expandable microspheres (TEMs) and incorporating these MXene/TEMs composites as fillers in polyurethane coatings on cotton fabrics, the resulting textile exhibited exceptional thermal management capabilities. Experimentally, the coating exhibited a low thermal conductivity of 0.031 W m −1 K −1 and demonstrated remarkable photothermal performance, with 93.5 % solar absorption and 28.5 % conversion efficiency. In passive mode, the 0.8 mm coating can increase simulated skin temperature by 4.2 °C, while in active mode, rapid warming of 15.8 °C within 30 s under solar irradiation was achieved with minimized heat loss. In addition to the low-density characteristics, the coatings also exhibit excellent mechanical strength, flexibility, breathability, and water vapor transmission. This smart textile, based on the synergy of thermal conductivity inhibition and efficient photothermal conversion, presents a novel strategy for lightweight and versatile all-weather personal thermal management textiles with broad application potential.
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高影响因子
Journal of Chemistry
·
2020
·
IF 1.79
Kangrui Sun,Panpan Li,Long Li,Yafei Guo,Tianlong Deng
This paper reports the molar heat capacities of β-CsB5O8·4H2O, which were measured by an accurate adiabatic calorimeter from 298 to 373 K with a heating rate of 0.1 K/min under nitrogen atmosphere. Neither phase transition nor thermal anomalies were observed. The molar heat capacity against temperature was fitted to a polynomial equation of Cp,m (J·mol−1·K−1) = 618.07702 + 39.52669[T − (Tmax + Tmin)/2]/(Tmax − Tmin)/2] − 3.46888[(T − (Tmax + Tmin)/2)/(Tmax − Tmin)/2]2 + 7.9441[(T − (Tmax+ Tmin)/2)/(Tmax − Tmin)/2]3. The relevant thermodynamic functions of enthalpy (HT − H298.15), entropy (ST − S298.15), and Gibbs free energy (GT − G298.15) of cesium pentaborate tetrahydrate from 298 to 375 K of 5 K intervals are also obtained on the basis of relational expression equations between thermodynamic functions and the molar heat capacity.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2019
·
IF 6.019
Bin Xu,Chenghua Chen,Jing Zhou,Zhongjin Ni,Xiaochun Ma
In this study, a novel microencapsulated phase change material paraffin@Cu-Cu 2 O/CNTs was successfully prepared by hydrothermal reduction and in situ deposition method , in which paraffin as the core, Cu, Cu 2 O and carbon nanotubes (CNTs) as the shell. SEM and TEM results proved that the microcapsules have a core-shell structure, the CNTs were irregularly wrapped on the shell, and the diameter of the microcapsules was about 600-800 nm. The melting temperature and latent heat of the paraffin@Cu-Cu 2 O/CNTs microcapsules were 61.17 °C and 81.31Jg -1 , respectively, and the encapsulation rate of the microcapsules was calculated to be 41.53% from the results of the DSC measurement. Due to the shell material, the paraffin@Cu-Cu 2 O/CNTs microcapsules displayed excellent thermal stability, its thermal decomposition temperature is increased by 97 °C compared to paraffin. Moreover, the paraffin@Cu-Cu 2 O/CNTs microcapsules were dispersed in water to form a new kind of slurry, such fluid exhibited great improvement in terms of thermal conductivity , specific heat capacity , light absorption performance and photo-thermal conversion efficiency than that of paraffin@Cu-Cu 2 O microcapsules slurry. Therefore, the high heat storage capability and excellent photo-thermal conversion performance of the paraffin@Cu-Cu 2 O/CNTs microcapsule slurry make it to be the most potential heat transfer fluid for direct absorption solar collector.
研究领域:
材料科学
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太阳能
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热能工程
✓ 已验证
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DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2025
·
IF 8.9
Jianhui Zeng,Taoying Rao,Ting Liang,Yimin Yao,Chaoyang Wang,Jian-Bin Xu,Liejun Li,Rong Sun
Amid the global surge in generative AI and the resulting compute revolution, thermal management has emerged to be a pivotal determinant of its success. Innovation in thermal interface materials (TIMs) now represents a strategic frontier in shaping the trajectory of the Fourth Industrial Revolution. Conventional silicone-based TIMs face a performance dilemma comprising thermal cycling-induced interfacial delamination, aging-related increases in interfacial thermal resistance. Building on previous work that introduced poly(ionic liquid)s (PILs) as a novel alternative to silicones, this study further optimizes the molecular structure of PILs. Incorporation of ethoxy groups significantly enhances the mechanical compliance of PIL while maintaining high adhesion strength. Robust hydrogen bonding between ethoxy groups in PIL and liquid metal enables a high loading of 82 vol% without leakage, achieving a thermal conductivity of nearly 5 W m −1 K −1 . Meanwhile, strong interfacial adhesion yields a interface contact thermal resistance of 0.74 ± 0.12 × 10 -6 m 2 ·K/W between the PIL/LM composite and Si, lower than that of silicone-based TIMs. The noncovalent self-healing of the PIL matrix effectively prevents crack formation in TIMs during aging. This work advances the application of PILs in TIMs and provides strategies for performance optimization, paving the way for their practical deployment as viable matrix alternatives.
研究领域:
材料科学
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热工程
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高分子化学
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纳米技术
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电子封装
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DOI
高影响因子
Science China-Technological Sciences
·
2024
·Vol. 67
·期 7
·2125-2132
·
IF 4.4
Zhu JingYu,Liu YaDong,Xie RuiJie,Zhao YuHan,Wang Feng,Liu YunQing,Zha BaoLi,Wu JianSheng,Huo FengWei
Flexible heaters with personal thermal management capabilities have great potential in thermal therapy applications due to their excellent flexibility, low power consumption, and portability. However, manufacturing wearable heating devices that are breathable, wear resistant and conformal for long-term use is still challenging. To address these issues, we designed a leather heater using breathable, biocompatible, and tailorable leather as the substrate through a simple in-situ polymerization polypyrrole strategy. This heater exhibits excellent heating and mechanical properties (reaching 64°C at a voltage of 5 V with efficient Joule heat generation of 2286 W/m 2 and uniform temperature distribution, and functioning properly after 1000 cycles of bendability tests). In addition, this heater displays better wear resistance and water vapor permeability rate (38.04 g/(m 2 h)). The cuttable and sewable of leather gives the strategy ability to be flexibly designed to mold the heater to the specific requirements of different body parts, providing a new approach to wearable thermal therapy.
研究领域:
生物医学工程
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材料科学
✓ 已验证
DOI
高影响因子
Journal of the Australian Ceramic Society
·
2021
·Vol. 57
·期 2
·525-532
·
IF 1.526
Liu Hao,Yang Yufei,Wang Zhoufu,Wang Xitang,Ma Yan
To improve the properties of mullite-based thermal insulation materials typically prepared by foam-casting method, samples were heat treated under carbon monoxide atmosphere created by a carbon bed at 600 °C and 800 °C, respectively. The effects of reduction process on microstructure, pore size distribution, phase evolution, cold crushing strength (CCS), and thermal conductivity of the resultant materials were systematically studied. The results showed that the formation of high aspect ratio mullite whiskers and small amounts of glassy phases among whiskers during the reduction process are demonstrated as the key factors in improving the properties of the resultant materials. The mechanical properties are determined to be significantly enhanced for the binding effect of glassy phase among whiskers with soaking duration gradually increased to 48 h. And the lower thermal conductivity of samples treated for 24–48 h are mainly due to the high connectivity and lowered size of pores from the accumulation of high aspect ratio whiskers. Compared with samples treated at 800 °C, both the highest CCS (4.2 MPa) and minimum thermal conductivity (0.15 W/m K) were obtained in the sample heat treated at 600 °C for 48 h. Hence, it was demonstrated that the use of low-temperature reduction process could enhance the mechanical and thermal insulation properties of mullite-based thermal insulation materials.
研究领域:
材料科学
·
无机非金属材料
·
热学性能研究
✓ 已验证
DOI
高影响因子
Chip
·
2022
·
IF 0
Sheng-Chang Ding,Jian-Feng Fan,Dong-Yi He,Lin-Feng Cai,Xiang-Liang Zeng,Lin-Lin Ren,Guo-Ping Du,Xiao-Liang Zeng,Rong Sun
The emerging applications of composite gels as thermal interface materials (TIMs) for chip heat dissipation in intelligent vehicle and wearable devices require high thermal conductivity and remarkable damping properties. However, thermal conductivity and damping properties are usually correlated and coupled each other. Here, inspired by Maxwell theory and adhesion mechanism of gecko's setae, we present a strategy to fabricate polydimethylsiloxane-based composite gels integrating high thermal conductivity and remarkable damping properties over a broad frequency and temperature range. The multiple relaxation modes of dangling chains and the dynamic interaction between the dangling chains and aluminum fillers can efficiently dissipate the vibration energy, endowing the composite gels with ultrahigh damping property (tan δ > 0.3) over a broad frequency (0.01 – 100 Hz) and temperature range (–50 – 150 °C), which exceeds typical state-of-the-art damping materials. The dangling chains also comfort to the interfaces between polymer matrix and aluminum via van der Waals interaction, resulting in high thermal conductivity (4.72 ± 0.04 W m –1 K –1 ). Using the polydimethylsiloxane-based composite gel as TIMs, we demonstrate effective heat dissipation in chip operating under vigorous vibrations. We believe that our strategy could be applied to a wide range of composite gels and lead to the development of high-performance composite gels as TIMs for chip heat dissipation.
研究领域:
材料科学
·
热管理
·
柔性电子器件
✓ 已验证
DOI
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2025
·
IF 5.8
Zexu Wang,Tingting Miao,Yaohui Zhang,Cheng Chang,Ruoxin Wang,Kai Lang,Fei Wang
To address the challenges of paraffin leakage and low thermal conductivity during heat transfer processes, we developed microencapsulated phase change materials (MEPCMs) through an ultrasonic-electrostatic self-assembly strategy. The system features paraffin as the core and graphene nanosheets as a multifunctional shell, with hot-pressing consolidation effectively minimizing interfacial voids and contact resistance. The microstructure and thermal characterization revealed that the graphene shell simultaneously prevents paraffin leakage and establishes a continuous thermal conduction network. With graphene content of 10 wt%, the thermal conductivity of the MEPCMs increased from 0.22 W/(m·K) to 1.86 W/(m·K), accompanied by enhancements of 39.56% and 41.12% in heat storage and exothermic rates, respectively. Additionally, the enthalpy of phase transition of the MEPCMs reached 144.27 J/g. The MEPCMs prepared in this study demonstrated excellent thermal storage capacity and high thermal conductivity, highlighting their potential for applications in thermal energy storage and thermal management.
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DOI
高影响因子
危险品化学品经营许可证（带存储）