INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Wenjuan Li,Shuo Yu,Liang Zhang,Jianfa Chen,Weiguo Cao,Yanhua Lan
The pyrolysis and combustion mechanism of the hydrocarbon fuel has important scientific and practical significance. However, it is difficult to detect the whole intermediates and products using traditional methods, which brings trouble to the analysis of the reaction process. In this paper, the microscopic reaction mechanism and the main products of n- eicosane (C 20 H 42 ) were simulated based on the reactive force field molecular dynamics (ReaxFF-MD). The effects of temperature (2000–3500 K) and oxygen on the initial decomposition, the distribution of main products, and the reactive pathways of C 20 H 42 fuel were studied to determine its reaction mechanism. The initial decomposition of C 20 H 42 was mainly initiated by small alkyl radicals in pyrolysis, and by the oxygen-containing radicals in combustion. The participation of oxygen had a greater effect on accelerating the decomposition reaction . The reactions involving oxygen of C 20 H 42 initial decomposition accounted for 87.5% of the total reactions at 2000 K. Moreover, the detailed distribution and formation pathways of the main products of H 2 , C 2 H 4 , CH 4 , H 2 O, CO, and CO 2 were depicted to construct the overall reaction mechanism of C 20 H 42 . •H radical formed from the composition of C 2 H 4 was exactly consistent with the •H radical consumed by the generation of CH 4 and H 2 in the pyrolysis stage. The feasibility of the simulation method was verified by the result of thermal analysis. The results are helpful for further research on the reaction mechanism of hydrocarbon fuels.
研究领域:
化学工程
·
能源科学
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DOI
高影响因子
EMBO REPORTS
·
2021
·Vol. 22
·期 3
·e51063
·
IF 8.807
Kishore K Joshi,Tarmie L Matlack,Stephanie Pyonteck,Mehul Vora,Ralph Menzel,Christopher Rongo
Metazoans use protein homeostasis (proteostasis) pathways to respond to adverse physiological conditions, changing environment, and aging. The nervous system regulates proteostasis in different tissues, but the mechanism is not understood. Here, we show that Caenorhabditis elegans employs biogenic amine neurotransmitters to regulate ubiquitin proteasome system (UPS) proteostasis in epithelia. Mutants for biogenic amine synthesis show decreased poly-ubiquitination and turnover of a GFP-based UPS substrate. Using RNA-seq and mass spectrometry, we found that biogenic amines promote eicosanoid production from poly-unsaturated fats (PUFAs) by regulating expression of cytochrome P450 monooxygenases. Mutants for one of these P450s share the same UPS phenotype observed in biogenic amine mutants. The production of n-6 eicosanoids is required for UPS substrate turnover, whereas accumulation of n-6 eicosanoids accelerates turnover. Our results suggest that sensory neurons secrete biogenic amines to modulate lipid signaling, which in turn activates stress response pathways to maintain UPS proteostasis.
研究领域:
分子生物学
·
神经科学
·
细胞生物学
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DOI
PubMed
高影响因子
RENEWABLE ENERGY
·
2019
·
IF 5.439
Manxiang Zhao,Xu Zhang,Xiangfei Kong
In this study, a kind of novel double phase change energy storage materials (DPCESM) based on two kinds of phase change nanocapsules and bentonite was reported. The nanocapsules ( n -ODE@CLPS and n -ESE@CLPS) were synthesized with n -octadecane ( n -ODE) and n -eicosane ( n -ESE) as phase change material (PCM), respectively, crosslinked polystyrene (CLPS) as shell, and DNS-86 as polymerizable emulsifier via soap-free miniemulsion polymerization method . The morphology, thermal energy storage capacity, and structure of nanocapsules and DPCESM were characterized and analyzed, respectively. Besides, the effects of DNS-86 on the thermal storage performance of nanocapsules were investigated. The results showed that the encapsulation efficiency of nanocapsules was the highest along with the excellent chemical stability and heat storage capacity when the percentage of polymerizable emulsifier was 2 wt%. The average diameter of n -ODE@CLPS was 136 nm, and the latent heat of phase change and encapsulation efficiency were 140.39 J/g and 91.28%, respectively. Meanwhile, the average diameter of n -ESE@CLPS was 134 nm, the latent heat of phase change and encapsulation efficiency were 148.32 J/g and 91.77%, respectively. Besides, the melting points of DPCESM were 26.25 °C and 34.58 °C, and the heat storage capacity was 90.17 J/g. Moreover, because of the doping of bentonite, the thermal conductivity of DPCESM can reach to 0.45 W/(m·K), which is 104.5% and 150% larger than pure n -ODE and n -ESE, respectively. The DPCESM can be used to adjust the indoor temperature and would be widely used as a promising composite phase change material.
研究领域:
材料科学
·
化学工程
·
能量存储
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产品关联
DOI
高影响因子
Journal of Building Engineering
·
2025
·
IF 7.4
Linhan Lei,Guokun Yang,Tianle Liu,Bo Qu,Gang Lei,Chuanlin Que,Shaojun Zheng
Microencapsulated phase change materials (MPCMs) are increasingly utilized in energy-efficient building systems, primarily aimed at improving indoor thermal comfort while also reducing overall energy demands. To further extend the range of MPCM applications, recent research efforts have been directed towards the development of MPCMs with enhanced multifunctional capabilities that go beyond traditional thermal energy storage. In this study, a novel multifunctional MPCM, termed Oc/Ei@BaSO 4 , was synthesized using a self-assembly technique. The core consists of a 7:3 blend of octadecane and eicosane, encapsulated within a barium sulfate shell. The high atomic number of Ba provides Oc/Ei@BaSO 4 with enhanced ionizing radiation shielding capabilities. The binary core composition provides dual phase change temperatures of 9.0 °C and 27.6 °C, making it suitable for thermal storage across multiple seasons. After 100 thermal cycles, the latent heat of Oc/Ei@BaSO 4 decreased by only 1.59 J/g, meeting the requirements for good thermal stability in building wall applications. Additionally, cement blocks incorporating various mass fractions of Oc/Ei@BaSO 4 (CPM) were prepared, and their ionizing radiation shielding performance was characterized through both experimental measurements and simulations. The results indicate that the inclusion of Oc/Ei@BaSO 4 significantly improved the shielding capacity of CPM across different X-ray intensities, with the linear attenuation coefficient of CPM 8 % increasing by 27.62 % compared to the control group. The relationship between Oc/Ei@BaSO 4 content and the attenuation coefficient of CPM was further predicted using the XCOM code, showing good predictive accuracy, especially at lower radiation intensities, with deviations from experimental values of around 20 %. The development of this multifunctional MPCM extends the applicability of MPCMs, offering potential for radiation shielding in medical facilities, nuclear power plants, and space radiation protection, providing a promising solution for these specialized areas within the construction industry.
研究领域:
材料科学
·
建筑工程
·
能量储存
·
辐射防护
·
核工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Mingtai Hou,Zeyi Jiang,Fuqiang Chu,Xinru Zhang,Nien-Chu Lai
Organic phase change materials (PCMs) promise remarkable latent heat storage capacity but suffer from weak visible-light absorption capability and ultralow thermal conductivity for harvesting and conversion of clean solar energy. Herein, we design and synthesize a new core@shell structured n-eicosane@TiO 2 /TiN composite microcapsules which can realize 98.08 % of thermal energy storage capacity. By making use of the localized surface plasmon resonance of high-thermal-conductivity TiN , the prepared composite microcapsules possess a remarkable photo-thermal conversion efficiency up to 78.4 %. Plasmonics TiN can not only efficiently adsorb visible light and convert the optical energy into heat but also enhance thermal conductivity of the composite microcapsules, resulting in ultra-low supercooling degree of 1.02 o C. In addition, the composite microcapsules exhibit excellent phase change reversibility and thermal durability during the 100-cyclic scans. Our work offers new insights into designing high-performance microcapsuled PCMs in solar thermal applications, bringing great potential for renewable energy utilization beyond traditional fossil energy sources.
研究领域:
材料科学
·
太阳能
·
相变材料
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Zhiheng Zheng,Huan Liu,Xiaodong Wang
A novel double-layered hydrogel based on the polyacrylamide matrix, pen ink, and phase-change microcapsules was developed to construct a hydrogel-based evaporator for efficient and continuous seawater desalination . The n -eicosane (core)@crystalline TiO 2 (shell) phase-change microcapsules were fabricated through interfacial polycondensation , and the resulting phase-change microcapsules obtained a considerably high latent-heat capacity of 187 J·g −1 . The upper layer of the hydrogel exhibits a high solar absorptivity of over 90 % due to the introduction of pen ink as a solar absorber, which helps the hydrogel-based evaporator to gain an excellent photothermal energy conversion capability. A high evaporation efficiency of 93.89 % was obtained for the developed hydrogel-based evaporator along with a high evaporation rate of 1.85 kg·m −2 ·h −1 under one-sun illumination. The phase-change microcapsules dispersed in the lower layer of the hydrogel can act as a latent heat-storage unit to store a great quantity of photothermal energy through melting phase change by the phase change material core. This imparts a consecutive evaporation capability to the developed hydrogel-based evaporator. As a result, its water production was increased by 11 % under 50-min one-sun illumination and 50-min non-illumination.
研究领域:
材料科学
·
环境工程
·
太阳能
·
水处理
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产品关联
DOI
高影响因子
JOURNAL OF NUTRITIONAL BIOCHEMISTRY
·
2020
·
IF 4.873
Liu Tang,Xiao-Lei Li,Zi-Xin Deng,Yao Xiao,Ya-Hong Cheng,Jing Li,Hong Ding
Conjugated linoleic acid (CLA), commonly found in beef, lamb and dairy products, has been reported to exhibit anti-inflammatory and antipruritus effects and to inhibit the release of chemical mediators such as histamine and eicosanoid in laboratory rodents. The chief objective of the study is to assess the efficacy of CLA on atopic dermatitis (AD) in mice and to explore possible mechanisms with CLA treatments . To develop a new therapy for AD, the anti-AD potential of CLA was investigated by inducing AD-like skin lesions in mice using 2,4-dinitrofluorobenzene. We evaluated dermatitis severity; histopathological changes; serum levels of T helper (Th) cytokines (interferon-γ, interleukin-4); changes in protein expression by western blotting and immunohistochemistry staining for cyclooxygenase-2 (COX-2), 5-lipoxygenase (5-LOX), toll like receptor 4 (TLR-4), myeloid differentiation factor 88 (MyD88), nuclear factor-κB (NF-κB) and tumor necrosis factor α (TNF-α); and production of the proinflammatory lipid mediators, such as prostaglandin E 2 and leukotriene B4 , in the skin lesions. Treatment with CLA ameliorated the development of AD-like clinical symptoms and effectively inhibited epidermal hyperplasia and infiltration of mast cells and CD4 + T cells in the AD mouse skin. Total serum immunoglobulin E levels and the expression levels of Th1/Th2 cytokines and lipid mediators in dorsal skin were dramatically suppressed by CLA. Furthermore, CLA down-regulated the expressions of COX-2, 5-LOX, TLR4, MyD88, NF-κB and TNF-α. Taken together, our findings demonstrate the potential usefulness of CLA as an anti-inflammatory dietary supplement or drug for the prevention and management of AD skin diseases by modulating the COX-2/5-LOX and TLR4/MyD88/NF-κB signaling pathways .
研究领域:
免疫学
·
药理学
·
皮肤科
·
分子生物学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED THERMAL ENGINEERING
·
2025
·
IF 6.9
Zeyang Kang,Ting Zhang,Yue Ma,Li Zhan,Xiangyang Liu,Maogang He
Efficient thermal management in extremely cold environments requires materials that can combine excellent insulation, rapid controllable heating, and long-duration heat retention. However, conventional composite phase change materials generally suffer from low thermal conductivity, poor shape stability, and sluggish heating response. In this study, a lightweight multifunctional cellulose nanofibril-silver nanowire-n-eicosane composite aerogel was designed to integrate heat storage, enhanced heat conduction, and electrothermal heating within a single system. The three-dimensional cellulose scaffold reinforced with high-aspect-ratio silver nanowires forms continuous conductive pathways, effectively improving both thermal and electrical transport. This unique structure enables fast and uniform charging of the embedded phase change medium during Joule heating, achieving an encapsulation efficiency of 93.4 %, a latent heat of 217.6 J g −1 , and a 74.7 % increase in thermal conductivity compared to pure n-eicosane. The material rapidly heats to 40.0 °C within 80 s under a 9 V input and exhibits over 1200s of stable heat release, mitigating heat loss even under −5 °C ambient conditions. Numerical simulations confirm that the synergistic effect of conductive networks and latent heat buffering allows efficient thermal regulation. This work provides a practical materials strategy for low-energy building envelopes, personal heating devices, and cold-region thermal protection applications.
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产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2025
·
IF 5.8
Junjie He,Xingang Wang,Xiangyang Xu,Xin Zhou,Wenxiao Chu,Qiuwang Wang
To ensure the stable operation of high-power transmitter and receiver (T/R) module in the complex aerospace environment, this study presents an integrated thermal buffer combing a vapor chamber (VC) with trapezoidal microgroove wick structure and heat storage container filled by phase change materials (PCMs). A common surface between the two components is manufactured by 3D printer without thermal contact resistance. The effects of gravity and vibration conditions on the thermal management performance are considered. Results show that the sustained operation significantly depends on the heat dissipation efficiency at the VC condensing surface while the tested integrated thermal buffer is capable to guarantee the continuous operation of the simulated T/R module for at least 5 cycles. However, when operating under a higher thermal power, the safely operating cycle drops to three dues to the not fully exploited PCM during fast charging process. Meanwhile, it is found that the high-frequency vibration can maintain the thermal resistance of vapor chamber below 0.15 K/W and suppress the temperature rise rate of simulated T/R module by 1.65 °C/min. Based on the standardized multiple linear regression, the deviation of the PCM's temperature from its melting point might lead to adverse effect on heat transfer performance. Provided that the heat dissipation performance at the condensing surface is maintained, increasing the heat flux or vibration frequency can reduce the average thermal resistance of VC. Among these, the variation in heat flux yields the most significant amelioration.
研究领域:
热科学与工程
·
航空航天工程
·
电子封装
·
相变材料
·
传热学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2025
·
IF 3.7
Yan Zhang,Huan Liu,Shan Yu,Ruocheng Pei,Haiyang Hu,Weiwei Wang,Ping Xu,Hongzhi Tang
Oil contamination poses significant risks to human health and ecosystems, emphasizing the importance of studying alkane biodegradation. In this study, we found that Rhodococcus erythropolis XP can utilize various alkanes, including C16–C36 n-alkanes and iso-alkane (pristane). The degradation capacity was significant, with over 95% of C20 degraded (500–2,500 mg/L) within 72 h. The bioremediation capacity in oily sludge was determined by a novel Low Pressure Gas Chromatography-Mass Spectrometry methodology especially for rapid analysis (within 12 min) of n-alkanes. Notable biodegradation of C14–C30 alkanes was observed in sludge treated with Rhodococcus erythropolis XP. In addition, metabolic intermediates of C16 and C20 were identified, indicating the presence of both terminal and subterminal pathways in Rhodococcus erythropolis XP. A new Baeyer-Villiger monooxygenase (BVMO_4041) was characterized, which catalyzes a key step in the subterminal pathway of alkane degradation. These results reflect the promise of Rhodococcus erythropolis XP in addressing the pressing need for efficient alkane degradation in contaminated environments.
研究领域:
环境微生物学
·
生物修复
·
石油烃降解
·
应用微生物学
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NATURE
·
2026
·Vol. 649
·期 8096
·360-365
·
IF 48.5
Li Zi-Rui,Hu Nan,Wang Zhen-Bo,Fu Guo-Tao,Lai Yang-Yan,Wu Yue-Fei,Jiang Jia-Jie,Wang Xiao-Rong,Ni Shuang-Shuang,Ye Yu-Min,Yu Zi-Tao,Gao Xiang,Stone Howard A.,Fan Li-Wu
Phase-change thermal batteries for renewable energy storage and waste heat recovery demand high energy density and fast charging 1 , 2 , 3 , 4 , 5 , which are mutually exclusive because phase-change materials (PCMs) with high melting enthalpy are usually poor heat conductors 6 , 7 , 8 . The charging rate can be improved by making composite phase-change materials (CPCMs) with increased thermal conductivity 9 and/or by exerting an external force to realize close-contact melting (CCM) 10 , 11 , 12 . However, these methods inevitably result in energy density losses and/or extra energy consumption. Here we report a strategy to boost the charging rates without sacrificing energy density, based on a rational design of a composite coating that enables slip-enhanced close-contact melting (sCCM) inside sealed thermal batteries. Using organic PCMs, we demonstrate a record-high power density of 1,100 ± 2% kW m −3 in a prototype. Our coating design integrates a pulse-heated (PH) layer that premelts the PCM to initiate CCM, together with a liquid-like slip surface that ensures unimpeded sinking of the remaining solid and sustains the sCCM mode throughout charging. We develop a model to explain how the slip surface enhances the charging rate. With high cycling life, adaptability and scalability, this strategy is generalizable to diverse PCMs, enabling high-performance thermal energy storage over a wide range of temperatures.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2026
·
IF 11.8
Cuncun Qian,Jingping Zuo,Yu Zhang
Under high-rate discharge, lithium-ion batteries (LiBs) are prone to severe temperature rise and thermal runaway, necessitating effective thermal management. Conventional active thermal management strategies consume substantial energy to maintain constant system temperature. In this study, a passive temperature control method is proposed for LiBs under high-rate discharge conditions. Numerical simulations and experimental investigations were conducted to validate the effectiveness of this method in regulating battery module temperature. Under 3C discharge conditions, the proposed method reduced the maximum module temperature to 35.49 °C, achieving a 60.8 % decrease compared to the module without thermal management. The temperature difference within the module was only 2.69 °C. Furthermore, the thermal management performance of different carbon-based composite phase change materials (PCMs) for the battery system was investigated. Optimal thermal management performance was achieved using a composite PCM (c-PCM) with a phase change temperature of 33.54℃, thermal conductivity of 6.82 W·m −1 ·K −1 , and latent heat of 222.33 J/g. Finally, an Ei@8 %EG c-PCM was fabricated experimentally, and the effectiveness of its thermal management performance was verified. The proposed passive thermal management approach offers significant application value for microgrid energy storage systems based on renewable energy sources by reducing the parasitic energy consumption associated with active thermal management methods.
✓ 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）