SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2024
·
IF 6.3
Jia Gao,Hainan Zhang,Xiangge Han,Shuhui Liang,Weiqi Zhou,Shuliang Dou,Jiazhi Wang,Yao Li
Dynamic infrared radiation has significantly contributed to thermal comfort by adaptively radiating heat into space without necessitating external energy consumption. This study introduces a novel approach to fabricate dynamic infrared radiation-regulated materials using VO 2 nanorods. The VO 2 nanorods were synthesized via a conventional hydrothermal method. XRD and SEM analyses confirmed the high crystallinity and uniform size of the VO 2 nanorods. HRTEM measurements revealed that the nanorods had an approximate length of 1 μm and a width of 100 nm. These nanorods were combined with KBr and pressed into a tablet form. Subsequent thermal imaging was conducted to assess their dynamic infrared radiation regulation capability. Remarkably, the optimized variation in emissivity for the VO 2 -based tablets reached up to 0.46. And the Mie scattering theory was used to interprete the insight mechanism. It seems that the Q abs of VO 2 nanorod before and after phase transition dominate the dynamic infrared radiation regulation ability at different temperatures. This finding offers a novel, straightforward, and highly efficient energy-saving solution for thermal management systems.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Chemistry
·
2024
·
IF 14
Meng-Chen Huang,Chao-Hua Xue,Zhongxue Bai,Jun Cheng,Yong-Gang Wu,Chao-Qun Ma,Li Wan,Long Xie,Hui-Di Wang,Bing-Ying Liu,Xiao-Jing Guo
All-season thermal management with zero energy consumption and emissions is more crucial to global decarbonization over traditional energy-intensive cooling/heating systems. However, the static single thermal management for cooling or heating fails to self-regulate the temperature in dynamic seasonal temperature condition. Herein, inspired by the dual-temperature regulation function of the fur color changes on the backs and abdomens of penguins, a smart thermal management composite hydrogel (PNA@H-PM Gel) system was subtly created though an “on-demand” dual-layer structure design strategy. The PNA@H-PM Gel system features synchronous solar and thermal radiation modulation as well as tunable phase transition temperatures to meet the variable seasonal thermal requirements and energy-saving demands via self-adaptive radiative cooling and solar heating regulation. Furthermore, this system demonstrates superb modulations of both the solar reflectance (Δ R = 0.74) and thermal emissivity (Δ E = 0.52) in response to ambient temperature changes, highlighting efficient temperature regulation with average radiative cooling and solar heating effects of 9.6 °C in summer and 6.1 °C in winter, respectively. Moreover, compared to standard building baselines, the PNA@H-PM Gel presents a more substantial energy-saving cooling/heating potentials for energy-efficient buildings across various regions and climates. This novel solution, inspired by penguins in the real world, will offer a fresh approach for producing intelligent, energy-saving thermal management materials, and serve for temperature regulation under dynamic climate conditions and even throughout all seasons.
研究领域:
材料科学
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生物仿生学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
YueChao Zhao,Fei Fang
Flexible biomimetic photonic structures, capable of achieving dynamic radiation modulation in both solar and infrared (IR) bands as required, are increasingly catering to low-energy thermal management and sustainable development. Herein, the cephalopod-inspired composite film of styrene-ethylene-butene-styrene block copolymer (SEBS)/titanium dioxide (TiO 2 )-Mxene has been designed and prepared. Analogous to squid leucophores, the SEBS/TiO 2 layer of is able to regulate solar reflection and transmit infrared radiation. Mimicking squid iridocytes, the Mxene layer can regulate infrared reflection and absorb sunlight. The optimal structural parameters of the film and the regulation contrast were estimated via theoretical analysis. The theoretical design also illustrates that the two layers collaborate without interference. According to the optimal parameters, the Mxene-SEBS/TiO 2 film was prepared. A dynamic regulation between radiative heating and cooling, namely, the solar reflection between 38 % and 66 % and infrared emissivity between 68 % and 89 % can be realized via mechanical actuation under 200 % strain. As the solar radiation is ∼650 W/m 2 , the composite film achieves ∼6.2 °C heating/∼1.4 °C cooling of the skin under mechanical actuation. When reducing the natural convection loss, the film further achieves ∼11.6 °C heating/∼0.8 °C cooling of the skin. This work provides a novel system and strategy for radiation modulation in solar-infrared bands for possible applications in thermal management.
研究领域:
材料科学
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能源科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2025
·
IF 6.3
Junyu Yuan,Shengwei Tang,Junlong Niu,Yulin Liu,Chunyang Jia
The conductive layer of the conductive gold electrode, firmly combined with the flexible substrate and possessing high reflectance, is key factor in achieving wide-band regulation of electrochromic devices. However, existing preparation methods such as physical vapor deposition and chemical gold plating are costly and complex. In response to the wide-band regulation requirements of electrochromic devices, a flexible conductive gold electrode with high reflectance was prepared using gold foil as the conductive material. This process is simple and incurs no processing loss. A polyaniline (PANI) film was deposited on the surface of the flexible conductive gold electrode through cyclic voltammetry, and a PANI-based electrochromic device was subsequently prepared. The electrochromic device exhibits striking color changes in visible light, including bright yellow, green, and dark green. Moreover, it demonstrates excellent regulation performance in the near-infrared band, with a reflectance change of up to 72.5 %. In the mid-infrared range, it shows good emissivity regulation performance, with an emissivity change reaching 0.45. This device has promising application prospects in solar radiation regulation. Demonstration experiments verified that in the solar radiation band, it has a solar absorption rate change range of 0.34–0.90. Under standard sunlight irradiation, the device achieves a temperature regulation of 9.2 °C.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruijie Ma,Tong Xue,Tianci Han,Chaoxia Wang,Yunjie Yin
Global energy demands and climate change challenges have highlighted the need for sustainable and energy-efficient solutions, driving interest in personal thermal management (PTM) technologies. Traditional PTM systems, however, rely on unidirectional thermal regulation, limiting their adaptability to fluctuating ambient conditions and humidity gradients. To overcome these limitations, we engineered a Janus Nano-ZnO/rGO nonwoven fabric (NZr@NF) that combines dynamic bidirectional thermal regulation with unidirectional sweat transport. The cooling side, featuring in situ grown Nano-ZnO layers, achieved high solar reflectance (88.49 %) and infrared emittance (94.20 %), allowing for net radiative cooling power of up to 100.38 W·m −2 . The heating side, functionalized with PDMS@rGO composites, demonstrated remarkable solar absorptance (94.86 %). Compared with the raw fabric, outdoor measurements demonstrated that it achieved an additional cooling effect of 6.27 °C and an additional heating effect of 17.1 °C. This Janus NZr@NF also excelled in moisture-wicking, achieving a cumulative one-way moisture transport index of 442.1 %, effectively mitigating post-sweat discomfort by facilitating evaporation and heat dissipation. With its ultraviolet (UV) resistance, breathability, and moisture permeability, this multifunctional metamaterial provides an innovative direction for wearable energy-saving PTM fabrics.
研究领域:
材料科学
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纺织工程
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热调控技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
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IF 10.383
Shanshan Song,Gaoping Xu,Bo Wang,Dongqi Liu,Zichen Ren,Chengyu Wang,Jiupeng Zhao,Leipeng Zhang,Yao Li
A multifunctional electronic skin with thermal radiation regulation and electromagnetic interference (EMI) shielding is urgent for electronic systems because of the thermal radiation emission and electromagnetic wave pollution. Herein, a flexible electronic skin was designed and fabricated, where the polyaniline (PANI) served as the functional layer and Ti3C2Tx MXene was employed as the conductive electrode. The transformation of emeraldine salt (ES) and leucoemeraldine base (LB) of PANI makes the skin achieve an infrared emissivity modulation, and the electromagnetic loss of PANI and ultrahigh electrical conductivity of Ti3C2Tx MXene make it exhibit EMI shielding ability. Benefiting from the special structural design, the multifunctional skin with a small thickness (0.3 mm) and low surface density (0.06 g/cm2) exhibits an excellent infrared emissivity modulation ability (Δε) of 0.32 with emissive power of 119.1 W/m2 at the wavelength range of 2.5–25 μm and total shielding effectiveness (SET) of 36.3 dB over the X-band (8.2–12.4 GHz). Meanwhile, the multifunctional skin remains black in the visible spectrum but a changeable color in the infrared spectrum. Even after repeated bending and twisting, the multifunctional skin still maintains a good emissivity adjustment. The simultaneous realization of dynamic thermal radiation regulation and EMI shielding endows the skin promising potential for various fields, such as adaptive infrared camouflage, thermal regulation, anticounterfeiting, and EMI shielding-related crossing field.
研究领域:
材料科学
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电子工程
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纳米技术
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热管理
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电磁兼容性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Huaiyuan,Lu Yuanwei,Wang Jie,Qi Tao,Tian Xuefeng,Yang Chaowei,Huang Yuming,Wang Meiqi,Zhang Baiqi,Qu Zhibin,Zhou Wei,Sun Fei,Gao Jihui,Zhao Guangbo
Thermochromic smart windows offer an efficient solution to reduce building energy consumption by regulating solar radiation without external energy input. However, conventional thermochromic windows often struggle to achieve high luminous transmittance (>70%), strong solar modulation, and an optimal transition temperature (30–40 °C) simultaneously. Here, we present a hydrated ionic polymer thermochromic smart window, which transitions between transparent and blue states through temperature-induced hydration and dehydration. Notably, the smart windows exhibit significant solar modulation (Δ T sol = 30.5%) and high luminous transmittance ( T lum = 87.7%), with an adjustable transition temperature range from 25 °C to 42 °C. Additionally, no significant performance degradation was observed after 200 heating-cooling cycles and 120 days under high-humidity conditions. Field tests showed that the smart windows can reduce indoor temperatures by up to 10 °C compared to clear windows. Simulations indicate a most probable energy-saving efficiency of 11.4% compared to clear windows, with further improvements up to 17.7% when combined with Low-E glass in warm climates. This work delivers a high-performance thermochromic smart window and offers a promising strategy for improving building energy efficiency and promoting global sustainability.
研究领域:
材料科学
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建筑节能
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高分子化学
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智能材料
·
环境可持续性
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Kai Wang,Lei Zhang,Xiancai Jiang
Adaptive regulation of solar and thermal radiation by windows in diverse (hot and cold) climates is essential to reduce building energy consumption. However, conventional hydrogel-based thermochromic smart windows lack thermal radiation regulation, and have difficulty to combine high solar regulation with excellent freezing resistance. It is challenging to integrate the above performance into one hydrogel-based thermochromic window. Here, we firstly prepared poly(N-isopropylacrylamide- co -N, N-dimethylacrylamide)/ethylene glycol (PNDE) hydrogels with tunable and excellent freezing resistance (below −100 °C) by adding the anti-freezing agent ethylene glycol, and assembled PNDE hydrogels, polyvinylidene fluoride and polymethyl methacrylate-silver nanowires panels into a freezing-resistant smart window with solar and thermal radiation regulation (STR). PNDE hydrogels had an excellent thermochromic performance with luminous transmittance ( T lum ) of 89.3 %, solar regulation performance (Δ T sol ) of 80.7 % and tunable phase change temperature ( τ c , 22–44 °C). The assembled STR window showed high T lum of 68.2 %, high Δ T sol of 62.6 %, suitable τ c of ∼30 °C and freezing resistance to low temperature of −27 °C. Moreover, the different thermal emissivity (0.94 and 0.68) of the two sides of the STR window gave it the ability of radiative cooling in hot climates and warm-keeping in cold climates. Compared to the conventional thermochromic windows, the STR window promotes heat dissipation in hot conditions while reduces heat loss in cold conditions and is applicable to diverse climates, which is a promising energy-saving device for reducing building energy consumption.
研究领域:
材料科学
·
能源效率
·
智能材料
·
热致变色材料
·
建筑技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）