International Journal of Chemical Engineering
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2022
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IF 2.729
Wei Wang,Jiancun Gao,Chenguang Shi,Shengnan Wang,Yujing Li,Xiong Dai,Tianmeng Jiang
Thermal safety during the synthesis of a Grignard reagent under different dosing rates was evaluated in this work. A reaction calorimeter (SIMULAR) was used to investigate the heat release under isothermal experiment in the range of 0.5–2.0 g⋅min−1 dosing rates. The thermal decomposition of the Grignard reagent was analyzed using accelerating rate calorimetry (ARC). Furthermore, the risk assessment of thermal runaway was analyzed using a risk matrix and a Stoessel criticality diagram. The results indicate that decreasing the dosing rate can decrease the risk level of synthesizing the Grignard reagent from class 3 to class 1. However, the risk level was class 3 at different dosing rates when the induction period was considered. In the case of cooling failure, the most hazardous moment was the induction period, followed by the dosing period. These findings provide further evidence that the dose rate of 0.5 g⋅min−1 was safer to produce Grignard reagents.
研究领域:
化学工程
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安全科学
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物理化学
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DOI
高影响因子
Nano Energy
·
2022
·
IF 19.069
Weiwei Zhao,Wenjie Yu,Ye Jiang,Zeqi Yu,Guyue Wang,Xiaoqing Liu
Patterned composites with custom-tailored properties are essential for efficient thermal management required by the increasing integration and complexity of devices. In this work, a facile approach for the fabrication of functional, robust, and patterned composites was demonstrated using a simple and scalable laser engraving technique. Graphene patterns were incorporated into composites by the single- or multiple-lasing on poly(Ph-ddm) substrate. The resultant composites exhibited a high thermal conductivity (8.2 W/(m·K)) that was equivalent to an enhancement of 45 times compared to pure matrix. This increase was attributed to the formed high-quality graphene porous architecture, which established an effective heat conduction channel. With the merit of computer-aided design of the laser trajectory, the processing method offers the freedom to tailor the heat transfer pathway in composites. Besides, the composites presented the favorable Joule heating performance in terms of fast and stable response with the heating efficiency up to 276 °C‧cm 2 /W. More interestingly, the heaters with designable thermal patterns were also allowed, in which the electrical property of each heating unit could be tailored by adjusting laser parameters. This provides a unique opportunity to simulate the real case of non-uniform heat sources in many electronic devices, which will facilitate the design and development of heating dissipation systems. The material/process developed promises a wide range of possibilities for the efficient thermal management applications.
研究领域:
材料科学
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热能工程
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DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Wenjie Sun,Qingyi Liu,Jiateng Zhao,Hafiz Muhammad Ali,Zafar Said,Changhui Liu
With the development of electronic machinery, the traditional heat exchange working fluid can no longer be used in some extreme working environments. As a new type of fluid, deep eutectic solvent has the advantages of promising thermal stability, low cost and non-toxicity through the hydrogen bond association of hydrogen bond acceptor and hydrogen bond donor, and is also coined to be an efficient heat transfer working fluid. In this work, three kinds of nanofluids filled with TiO 2 , Al 2 O 3 and Fe 2 O 3 nanoparticles were prepared with glycerol/sodium acetate trihydrate deep eutectic solvent as the base solution, and the mechanism of thermal conductivity change of nanofluids were discussed from atomic and microscopic levels. The experimental results showed that the prepared glycerol/ sodium acetate trihydrate 2:1 deep eutectic solvent system reduced the viscosity by 58.03% compared with glycerol, and increased the thermal conductivity by 17.2% compared with glycerol at 25 ℃. The effects of nanoparticles on thermal conductivity and specific heat capacity were also investigated. Compared with deep eutectic solvent, the thermal conductivity was improved after adding Fe 2 O 3 nanoparticles; it is worth noting that the specific heat capacity of nanofluids was more than doubled after adding nanoparticles.
研究领域:
材料科学
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热力学
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能源工程
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DOI
高影响因子
SENSORS
·
2023
·Vol. 23
·期 3
·1362
·
IF 3.9
Haozhi Zhang,Hao Jia,Weiwen Feng,Zao Ni,Pengcheng Xu,Xinxin Li
Ultra-responsive single-crystal silicon MEMS thermopiles for differential thermal analysis (DTA) are developed. Facilitated by a unique “microholes interetch and sealing (MIS)” technique, pairs of suspended thermopiles are batch fabricated in a differential form, with high-density (54 pairs) n-type/p-type single-crystal silicon thermocouples integrated within each thermopile (sample area ~0.045 mm2). The fabricated MEMS thermopile sensors exhibit outstanding power responsivity of 99.5 V/W and temperature responsivity of 27.8 mV/°C, which are more than 4 times higher than those reported for material thermal analysis. The high-responsivity MEMS DTA chips allow us to accurately measure the indium melting point at different heating rates of ~1–100 °C/s. We also perform DTA measurement of the dehydration process of CuSO4·5H2O and the crystals show three stages of losing water of crystallization before becoming anhydrous copper sulfate salt. Our high-performance, cost-effective MEMS sensing chips hold promise for rapid and accurate DTA characterization for a wide range of applications.Keywords:MEMS thermopile;differential thermal analysis;DTA;single-crystal silicon thermocouples;MIS process
研究领域:
材料科学
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微机电系统
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热分析技术
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产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
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2022
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IF 5.532
Yingxin Li,Wei Qian,Yinqun Hua,Yunxia Ye,Fengze Dai,Jie Cai
Thermal barrier coatings with excellent thermal performance and corrosion resistance are essential for improving the performance of aero-engines. In this paper, (Y 3-x Yb x )(Al 5-x Sc x )O 12 (x = 0, 0.1, 0.2, 0.3) thermal barrier coating materials were synthesized by a combination of sol-gel method and ball milling refinement method. The thermal properties of the (Y 3-x Yb x )(Al 5-x Sc x )O 12 ceramics were significantly improved by increasing Yb and Sc doping content. Among designed ceramics, (Y 2.8 Yb 0.2 )(Al 4.8 Sc 0.2 )O 12 (YS-YAG) showed the lowest thermal conductivity (1.58 Wm −1 K −1 , at 800 °C) and the highest thermal expansion coefficient (10.7 × 10 −6 K −1 , at 1000 °C). In addition, calcium-magnesium- aluminum -silicate (CMAS) corrosion resistance of YS-YAG was further investigated. It was observed that YS-YAG ceramic effectively prevented CMAS corrosion due to its chemical inertness to CMAS as well as its unique and complex structure. Due to the excellent thermal properties and CMAS corrosion resistance, YS-YAG is considered to be prospective material for thermal barrier coatings.
研究领域:
材料科学
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航空工程
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产品关联
DOI
高影响因子
Case Studies in Thermal Engineering
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2023
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IF 6.8
Jing Fan,Dazhi Gao,Fenhong Song
Deep eutectic solvents are now widely used in metal electrochemical deposition, biomass catalysis and material synthesis because of their advantages of greenness, low cost, good biocompatibility and biodegradability, and it is proved that DESs have great potential for its utilization as heat transfer fluids. In this work, eight DESs were prepared by thermal method using choline chloride as the hydrogen bond acceptor and glycerol, polyethylene glycol 600, lactic acid and o-cresol as the hydrogen bond donor. Based on the flow calorimetry method, the specific heat capacity system was established and its reliability and precision were verified by measuring the specific heat capacity of deionized water. The maximum deviation of the experimental value and the standard value under the pressure 101 kPa was 2.03%, and the average absolute deviation was 1.01%, and the repeatability was less than 1.5%. Then, the densities and the constant pressure specific heat capacities of eight DESs in the temperature range of 293 K–353 K and 293 K–373 K were measured respectively. The experimental results could support for the scale utilization of DESs.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2023
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IF 8.7
Yuxin Zhang,Dingsheng Wu,Shiqin Liao,Dongsheng Chen,Alfred Mensah,Xue Guo,Pengfei Lv,Qufu Wei
Passive radiative thermal management has been recognized as one of the most promising energy-saving technologies to provide thermal comfortable environment. However, static function and complex production process limit its application. Herein, we propose a simple strategy to achieve the integration of radiative cooling, radiative heating, and active electro-thermal heating. It is worth stressing that the radiative cooling is only based on the self-reflective structure and self-emissive molecular property of cellulose acetate electrospun membrane. In cooling mode, the average temperature of Janus film outdoor is 9.4 °C lower than commercial cotton fabric. Meanwhile, radiative heating and active heating stem from the photothermal and electrothermal performance of MXene . In heating mode, the average temperature of Janus film is 40 °C higher than cotton fabric. Flipping the Janus film allows for dynamic thermal management. In short, the scalable and universal strategy paves the way for the development of dynamic thermal-regulating technology.
研究领域:
材料科学
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能源技术
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产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Lei Hou,Jin-Chao Ji,Gong-Peng Cui,Kai-Yin Sun,Hong-Bo Lan,Mei Chen,Chang-Ping Feng,Fang Wei
Thermal interface materials (TIMs) play a crucial role in addressing the heat dissipation challenges of electronic components, which needing high thermal conductivity and low thermal resistance to effectively improve heat transfer between chip and heat sink. This work focuses on the design of a 3D printable phase change based TIMs, which can be integrated with 3D printing technology to provide shapes suitable for quickly filling the gap between the chip and the heat sink in actual automated production. The optimized sample exhibits a total thermal resistance of 0.0012 m 2 K/W at operating temperature, with a through-plane thermal conductivity of 0.48 W/mK and an in-plane thermal conductivity of 1.24 W/mK. In practical thermal management, the resulting samples demonstrated a temperature reduction of 22 °C comparison with commercial TIM, highlighting its superior heat dissipation capability.
研究领域:
材料科学
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热工程
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增材制造
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电子冷却
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Kaili Qiu,Ahmed Elhassan,Tianhe Tian,Xia Yin,Jianyong Yu,Zhaoling Li,Bin Ding
Controlling thermal energy is one of the biggest concerns along with the progress of human civilization for thousands of years. Current thermal comfort devices are mainly based on materials that are bulky, rigid, and heavy, largely limiting their widespread practical applications. It still remains a challenge to develop highly lightweight, flexible, and efficient electrical heaters for personal thermal management and local climate control. In this work, we present a high-performance composite infrared radiation heating fabric (IRHF), which mainly consists of two layers of poly(ethylene terephthalate) (PET) fabrics and one sandwiched layer of carbon nanofibers embedded with different inorganic nanoparticles. A copper electrode sheet was connected with the carbon nanofibers to form a conductive heating circuit. The permanent spontaneous polarization of both carbon nanofibers and infrared radiation nanoparticles can facilitate an enhanced current in the heater by creating an additional electrical field, which results in a fast electrothermal response and favorable heat preservation. The constructed IRHF could achieve an increase in the temperature to 43 °C from room temperature in 1 min under a voltage of 30 V, with an electrothermal conversion efficiency up to 78.99%. With a collection of compelling features such as good thermal stability, excellent flexibility and breathability, and high electrical conductivity and energy conversion efficiency, the fabricated sandwich-structured IRHF can open up new opportunities to develop smart heating textiles and wearable heating clothes in many fields.
研究领域:
材料科学
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纺织工程
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能源技术
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产品关联
DOI
PubMed
高影响因子
Journal of Energy Chemistry
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2023
·
IF 13.1
Panpan Liu,Yang Li,Zhaodi Tang,Junjun Lv,Piao Cheng,Xuemei Diao,Yu Jiang,Xiao Chen,Ge Wang
Developing advanced nanocomposite integrating solar-driven thermal energy storage and thermal management functional microwave absorption can facilitate the cutting-edge application of phase change materials (PCMs). To conquer this goal, herein, two-dimensional MoS 2 nanosheets are grown in situ on the surface of one-dimensional CNTs to prepare core-sheath MoS 2 @CNTs for the encapsulation of paraffin wax (PW). Benefiting from the synergistic enhancement photothermal effect of MoS 2 and CNTs, MoS 2 @CNTs is capable of efficiently trapping photons and quickly transporting phonons, thus yielding a high solar-thermal energy conversion and storage efficiency of 94.97%. Meanwhile, PW/MoS 2 @CNTs composite PCMs exhibit a high phase change enthalpy of 101.60 J/g and excellent long-term thermal storage durability after undergoing multiple heating–cooling cycles. More attractively, PW/MoS 2 @CNTs composite PCMs realize thermal management functional microwave absorption in heat-related electronic application scenarios, which is superior to the single microwave absorption of traditional materials. The minimum reflection loss (RL) for PW/MoS 2 @CNTs is −28 dB at 12.91 GHz with a 2.0 mm thickness. This functional integration design provides some insightful references on developing advanced microwave absorbing composite PCMs, holding great potential towards high-efficiency solar energy utilization and thermally managed microwave absorption fields.
研究领域:
材料科学
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纳米技术
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能量存储
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热管理
·
微波吸收
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产品关联
DOI
高影响因子
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-8
·
IF 3.998
Chang Chao,Wang Zongyu,Fu Benwei,Ji Yulong
Solar energy as an abundant renewable resource has been investigated for many years. Solar thermoelectric conversion technology, which converts solar energy into thermal energy and then into electricity, has been developed and implemented in many important fields. The operation of solar–thermal–electric conversion systems, however, is strongly affected by the intermittency of solar radiation, which requires installation of thermal storage subsystems. In this work, we demonstrated a new solar–thermal–electric conversion system that consists of a thermoelectric converter and a rapidly charging thermal storage subsystem. A magnetic-responsive solar–thermal mesh was used as the movable charging source to convert incident concentrated sunlight into high-temperature heat, which can induce solid-to-liquid phase transition of molten salts. Driven by the external magnetic field, the solar–thermal mesh can move together with the receding solid–liquid interface thus rapidly storing the harvested solar–thermal energy within the molten salts. By connecting with a thermoelectric generator, the harvested solar–thermal energy can be further converted into electricity with a solar–thermal–electric energy conversion efficiency up to 2.56%, and the converted electrical energy can simultaneously light up more than 40 orange-colored LEDs. In addition to stable operation under sunlight, the charged thermal storage subsystem can release the stored heat and thus enables the solar–thermal–electric system to continuously generate electricity after removal of solar illumination.
研究领域:
能源科学
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材料科学
·
可再生能源技术
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DOI
PubMed
高影响因子
MODERN PHYSICS LETTERS B
·
2025
·
IF 2.2
Hao Xu,Lin Chen,Jiang Tian,Baihui Li,Luyang Zhang,Jiankun Wang,Jing Feng
High-entropy ceramics (HECs) are widely studied to boost the properties of various materials, based on the high-entropy effects and high disorders in ionic radius and atomic weights. To further optimize the properties of RETaO 4 (RE is rare-earth) as thermal barrier coatings (TBCs), a diatomic site high-entropy engineering is applied to increase their disorders, subsequently boosting their thermophysical properties. Four RETaO 4 HECs are designed and synthesized in this work, including (Gd 1 ∕ 5 Dy 1 ∕ 5 Ho 1 ∕ 5 Er 1 ∕ 5 Y 1 ∕ 5 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (5HECs-1), (Gd 1 ∕ 5 Dy 1 ∕ 5 Ho 1 ∕ 5 Er 1 ∕ 5 Yb 1 ∕ 5 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (5HECs-2), (Gd 1 ∕ 6 Dy 1 ∕ 6 Ho 1 ∕ 6 Er 1 ∕ 6 Yb 1 ∕ 6 Y 1 ∕ 6 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (6HECs-1), and (Gd 1 ∕ 6 Dy 1 ∕ 6 Ho 1 ∕ 6 Er 1 ∕ 6 Yb 1 ∕ 6 Lu 1 ∕ 6 ) (Ta 1 ∕ 2 Nb 1 ∕ 2 ) O 4 , (6HECs-2). It shows that the thermal conductivity (1.41–1.59 W ⋅ m − 1 ⋅ K − 1 , 9 0 0 ∘ C) is reduced, while thermal expansion coefficients are improved ( TECs = 1 0 . 4 4 – 1 0 . 8 7 × 1 0 − 6 K − 1 at 1 4 0 0 ∘ C), which are better than their single-RE ceramics. Furthermore, Young’s modulus is proportional to their A -site ionic radius, and RETaO 4 HECs have higher modulus than single-RE RETaO 4 and RENbO 4 ceramics. Accordingly, the diatomic site high-entropy engineering is effective in boosting the thermophysical properties of RETaO 4 , and this strategy can be tried in various oxide ceramics.
研究领域:
材料科学
·
热物理工程
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）