PROGRESS IN ORGANIC COATINGS
·
2019
·
IF 3.42
Huiping Song,Xu Lei,Fangbin Xue,Haibin Wu,Fangqin Cheng
Composite phase-change coating with coal-fly-ash-based zeolite as carrier was investigated in this paper. Coal-fly-ash-based mesoporous zeolite was impregnated in the melted binary (capric acid–palmitic acid) / ternary (capric acid–palmitic acid–paraffin) phase-change substances to prepare the phase-change particles. Then these phase-change particles were used as the functional fillers to prepare the phase-change coatings. The phase-change temperatures of binary and ternary zeolite phase-change particles were 24.33 and 24.50 ℃ (at which the human body feels comfortable), and the phase-change latent heats were 66.36 and 83.52 J/g, respectively. Their thermal stabilities were also favorable. Based on the phase-change materials’ appearance and property tests, the phase-change coatings showed good energy-storage and temperature-regulation abilities when the mixing ratio of emulsion, kaolin, and phase-change particles was 6:5:2. Therefore, the phase change coating using zeolite phase change particles as filler is potential to conserve energy in buildings.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 8
·085708
·
IF 1.449
Bian Wang,Qingjuan Wang,Yuting Zhu,Litao Kang,Jingxin Zhu,Fuyi Jiang,Wei Du,Dongjiang You,Zongtao Zhang,Feng Gao
Cesium tungsten bronze (CsxWO3) is an important functional material for energy efficient windows, showing excellent near infrared (NIR) shielding ability but no optical switching ability. In this paper, we demonstrate a photo-/thermo-dual-responsible CsxWO3/PNIPAM composite by dispersing CsxWO3 nanoparticles into PNIPAM hydrogels. Combination of the photothermic conversion ability of CsxWO3 with the thermochromic property of PNIPAM makes this hydrogel responds to both thermo- and photo-stimuli. In sunlight, the CsxWO3 component converts the absorbed infrared light into heat, triggering the phase transition of PNIPAM and switching the hydrogel into visibly opaque state (for example, transmittance decreased from 58% down to 15% at 590 nm). At the same time, an ambient temperature >32 °C can also initiate the phase transition of PNIPAM. Therefore, a photo- and/or thermo-derived transition between a 'transparent NIR-shielding' state and a 'full-solar-spectrum shielding' state is achieved, making it highly attractive for the applications as energy efficient windows for buildings in hot climate.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
Geoenergy Science and Engineering
·
2023
·
IF 0
Jiming Li,Siyi Wang,Dong Ge,Jianming Peng,Yanliang Li,Yanhong Xue
A feasibility study is important when determining the viability of a drilling tool. This paper considers several aspects of this drilling tool, including the relationship between the oil-water ratio, bentonite content, and drilling fluid temperature with the performance of the drilling tool, so that field engineers can make actionable plans. Based on the full stroke data measured by the laser sensor, time-displacement, and time-velocity curves compared across different OBM were graphed to characterize the impact body motion. Fluidic hammer driven by WBM is commonly higher than OBM in the tested supply flow rate range. Compared with WBM, adding bentonite is indispensable for a fluidic hammer powered by OBM to achieve good performance. The oil does not have a significant lubricating effect on the movement of fluidic down-the-hole hammer. The performance of the fluidic hammer driven by OBM exhibited higher elevation with temperature than that of WBM, which explains the susceptibility of oil to temperature. The fluidic down-the-hole hammer can work efficiently and reliably with OBM.
研究领域:
石油工程
·
机械工程
✓ 已验证
DOI
ADVANCED MATERIALS
·
2025
·Vol. 37
·期 21
·2500548
·
IF 26.8
Jianchen Han,Xiaohan Zhang,Yi Wang,Xinyao Zheng,Kaihao Zhang,Jinglei Yang,Zuankai Wang,Yuekuan Zhou
Traditional building envelopes with constant thermophysical properties constrain their capabilities in temperature regulation. Whether it is possible to achieve single-direction heat transfer along building envelopes with climate-adaptative thermophysical properties to enhance passive heat gain in winter and thermal dissipation in summer? In this work, through the capillary effect in interfacial evaporation and thermal diode structure, single-direction heat transfer with passively adjustable thermal properties in a vertical building envelope is practically achieved. An evaporation-condensation-based smart wall (ECSW) is manufactured for spontaneous and continuous cooling/heating supply to the built environment. The ECSW features climate-adaptative heat transfer characteristics with heat transfer coefficient transiting from 3.33 to ≈30 W m −2 K −1 . Additionally, coupling with radiant cooling and photothermal capabilities, ECSW shows excellent thermal performances, i.e., a heat transfer at 5.44 W m −2 by radiant cooling with a 5 °C cooler surface, and a heat transfer at 387.68 W m −2 under solar illumination at 1000 W m −2 . Simulation results show that the ECSW enables building energy savings at 66.47% in Kunming. This study first reports vertical thermal diode building envelopes utilizing natural heating/cooling sources through interfacial evaporation for passive temperature regulation with low costs, performance stability and energy-saving potentials for smart and sustainable buildings.
研究领域:
建筑材料
·
能源与环境
·
可持续建筑
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yupeng Hao,Lu Liu,Fantao Meng,Zaichao Li,Shufen Zhang,Yuang Zhang,Bingtao Tang
Phase change materials (PCMs) are reusable, environment-friendly temperature control materials that can reduce energy consumption and carbon emissions in greenhouse operations. However, the inherent rigidity and leakage of solid–liquid PCMs limit their practical application. In this work, a plastic, form-stable PCM was fabricated by in-situ encapsulation of phase change wax (PCW) and expanded graphite (EG) composites into a three-dimensional (3D) network crosslinked by calcium ions and sodium alginate. The 3D porous network provides high porosity (82.5%) and addresses the rigidity of traditional PCMs, improving their adaptability and applicability while promoting processability and ease of use. EG and the 3D network provide form stability to PCW through hierarchical synergistic encapsulation. Additionally, EG endows the composites with photothermal conversion properties. Based on the excellent performances, applying the composites in greenhouses remarkably reduced temperature fluctuations inside. This exploration offers a significant path for developing green and low carbon greenhouse energy conservation strategies.
研究领域:
材料科学
·
环境科学
·
农业工程
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2023
·
IF 3.9
Feifei Chen,Suju Jiang,Qiaozhi Zhou,Siqi Chen,Zihua Wu,Yuyang Guo,Anhua Wei,Jingmei Yuan,Guobao Huang
Facile preparation of small gold nanorod with controllable and large surface plasmon resonance band is of great value for applications in especially the biomedical and sensing fields. In this work, we propose that without addition of additive to complicate the experimental system catechol of a very weak reducibility can be used as reducing agent for seed-mediated synthesis of gold nanorod. Under a temperature of 40 °C and a catechol concentration of 17.5 mM, monodisperse gold nanorod with a high shape yield, a largest plasmon wavelength of 918 nm, and especially a small diameter of 9.8 nm can be acquired simultaneously. A good tune over the plasmon wavelength is also shown by varying the amount of silver ion . Besides, the effects of experimental parameters including silver ion, cetyltrimethylammonium bromide, gold seed and catechol have also been carefully studied, and the morphological and structural evolutions of the particle have been discussed based on reported growth mechanism.
研究领域:
材料科学
·
生物医学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2024
·
IF 8.3
Shuaibing Wang,Zhu Wang,Si Yu Zheng,Jintao Yang
Multifunctional composite materials with adjustable electromagnetic interference (EMI) shielding properties hold significant promise in the emerging field of combating electromagnetic radiation pollution. Herein, we construct a heterostructured composite foam with tunable EMI shielding performance by adjusting the thickness and spatial distribution of Ag conductive network in the porous sponge, coupled with the incorporation of CNTs/WPU aerogel . The remarkable conductivity of 3D Ag network within the composite foam enables it possesses excellent shielding performance at X-band (47.1 dB), fast sensing response time (∼0.2 s), and high temperature of 101.8 °C through efficient joule heating even at a low voltage of 3 V. Importantly, controllable tuning of EMI shielding effectiveness (from 25.0 to 40.1 dB), are successfully achieved by changing the position of the Ag layer or compression strain of the composite foam. These achievements underscore the substantial potential of this material for creating electromagnetic shielding solutions with adaptable characteristics.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2021
·
IF 6.141
Zhe Liu,Kun Wei,Sifan Wang,Biao Ma,Xiaoqing Wang,Wenshuo Shi,Jiayun Xu
In this study, epoxy resin/polyethylene glycol 2000 composite stereotyped phase-change material (EPPCM) particles were prepared. It was found that the phase change thermal storage properties were almost unchanged after heat treatment when the thermal decomposition onset temperature reached 230 °C according to Differential scanning calorimetry (DSC) analysis and Thermogravimetric analysis (TGA) test. Modified asphalt with increasing particle doping was prepared by high-speed shearing. Dynamic shear rheological (DSR) test, Bending beam rheometer (BBR) test, temperature regulation test and specific heat capacity test were carried out on modified asphalt. The results show that with the increase in EPPCM doping, gradual improvement of rheological properties of modified asphalt appeared, and there was an increasing trend occurred in the temperature regulation effect. The maximum temperature difference reached 4.3 °C and the specific heat capacity of asphalt increased as well.
研究领域:
材料科学
·
土木工程
✓ 已验证
DOI
高影响因子
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
·
2016
·Vol. 16
·期 1
·246-252
·
IF 1.338
Jiang Wei,Chen Binhua,Wu Juan,Xu Shanshan,Tian Renbing
The thermo-sensitive magnetic fluorescent trifunctional nanocomposite (Fe3O4/ZnS@PNIPAM) has been synthesized via a facile route. The obtained biocompatible nanocomposite was composed of monodisperse heterostructural Fe3O4/ZnS core and a thermo-sensitive
poly(N-isopropyl acrylamide) (PNIPAM) shell. Fe3O4/ZnS acted as magnetic response and fluorescence luminous body, PNIPAM acted as drug loaded platform which can adsorb and release drug controllably. Fe3O4/ZnS@PNIPAM was characterized and all
of the results showed that it had excellent magnetic response, photostability and thermo-sensitivity. Moreover, the drug release studies in vitro showed that the release rate increased with increasing temperature. MTT assays in model HepG2 cells demonstrated that Fe3O4/ZnS@PNIPAM
was practically non-toxic. Thus, our results revealed that Fe3O4/ZnS@PNIPAM would be used in biomedical fields such as targeted drug delivery, as well as cancer diagnosis and treatment in the nearly future.
研究领域:
生物医学工程
·
材料科学
·
药理学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Meiqi Liu,Zhaowen Huang,Akbar Bashir,Yichi Zhang,Haixia Qian,Xing Ouyang,Yan Hu,Haibin Chen,Da-Zhu Chen
The advancement of solid–solid phase change materials (SSPCMs) with crystalline segments embedded onto crosslinked polymer backbones offers a promising solution to the leakage problems associated with traditional phase change materials. Despite its potential, this technology faces challenges, including energy-intensive synthesis processes of SSPCMs and difficulties in custom designing materials for confined spaces. Herein, we introduce a novel strategy for the rapid preparation of polyurethane acrylate-based SSPCMs via UV-initiated polymerization. By leveraging crystalline segments from polyethylene glycol, the resulting SSPCM exhibits an impressive enthalpy of 110.4 J⋅g −1 , enabling seamless transitions from rigid to soft states during solid–solid phase changes. When applied in portable electronic devices, this SSPCM can be synthesized in-situ to meet various size requirements, demonstrating exceptional temperature regulation performance based on latent thermal energy storage mechanisms. Furthermore, by integrating thin layers of carbon nanotubes (CNTs) onto the rough surfaces of SSPCM films and employing a face-to-face configuration to convert temperature-sensitive mechanical changes into electric resistance variations, we have engineered high-temperature alarms for SSPCM-based temperature regulators. The advantages of this preparation strategy, combined with the thermal regulation capabilities and innovative temperature alarm design, underscore the significant potential for intelligent and adaptive applications of SSPCMs in advanced technological landscapes.
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
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xueping Sun,Yipeng Wu,Shaochun Tang
The advancement of energy-saving buildings requires both high-performance passive radiative cooling (PRC) and solar absorption heating (SAH) materials. Although many materials with PRC or SAH functions have been developed, they cannot adapt to the large fluctuations of ambient temperature in different seasons. Herein, we report the design and fabrication of a new thermochromic porous film (TMRC) with combined temperature-adaptive SAH and PRC performance to achieve “warm in winter and cool in summer” for all-year radiative cooling and solar heating. The porous structure and embedding thermochromic particles endow the TMRC with an ultrawide modulation capability for solar reflectivity ranging from 86.1% to 13.3% and a reversible color change in response to temperature variation. When the ambient temperature exceeds the transition temperature (Tc = 22 °C), TMRC enters a radiative cooling mode. At temperatures below the Tc, TMRC heats up by 6.5 °C in cold winter due to its high solar absorptivity. TMRC exhibits a rapid response time of 40 s at near room temperature. Compared to traditional cement coatings, TMRC can reduce energy consumption up to 38.05 kWh/m2 (18%) in midlatitude regions according to energy consumption simulations. In addition, TMRC shows excellent self-cleaning and UV-aging resistance abilities. Therefore, this work provides a low-cost and scalable technique for reversible TMRC for all-year-efficient thermal management.
研究领域:
材料科学
·
能源工程
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Yafei Xu,Jun Wang,Rui Xu,Wuke Li
A smart catalyst was fabricated by combining ordered mesoporous silica , Pt nanoparticles with ultra-small size (<2 nm), decatungstoeuropate and thermo-responsive polymer. Due to the coating of thermo-sensitive polymer and loading of Pt nanoparticles, the catalyst shows the thermo-controlled catalytic activity in the release of hydrogen from ammonia borane . For example, the catalyst has high catalytic activity at room temperature , showing catalytic “on” state. However, the hydrogen generation can be obviously suppressed at high temperature, showing catalytic “off” state. Furthermore, the composite hydrogel shows the switchable red luminescence in solution at high/low temperatures, which offers the possibility to track catalyst and understand catalytic mechanism. The thermo-controllable system of hydrogen generation has great potential applications in the safe hydrolysis from chemical hydride fuel. The smart catalyst could automatically decrease the release of hydrogen when the temperature of fuel system is high.
研究领域:
材料科学
·
催化化学
·
能源化学
✓ 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）