JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jintao Wang,Du Hong,Xin Zhong,Liping Huang,Yaran Niu,Hong Li,Xuebin Zheng,Jinliang Sun
The abradable sealing coatings (ASCs) matched with ceramic matrix composites (CMCs) can improve engine efficiency and reduce fuel consumption. A study of plasma-sprayed porous Yb 2 Si 2 O 7 -20 vol% CaF 2 with various contents of poly-p-hydroxybenzoate (PHB) as ASCs compatible with CMCs is reported. The microstructure and phase composition, Rockwell hardness, wear behaviors and abradability of the coatings were comparatively studied. The results show that the porosity increased and the hardness decreased as the PHB content was increased, and the coating containing 20 vol% PHB had a minimum hardness of about 65.2 HR45Y and a maximum porosity of about 39.2%. The friction coefficients and IDR values decreased, wear depth and volume wear rates of the coatings effectively improved with the increase of porosity. The wear mechanisms were analyzed based on the observation of the worn surfaces. This work might provide some guidance for the design and application of ASCs for CMCs.
研究领域:
材料科学
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
Lubricants
·
2025
·Vol. 13
·期 2
·61
·
IF 2.9
Tiancheng Ye,Kai Le,Ganggang Wang,Zhenghao Ren,Yuzhen Liu,Liwei Zheng,Hui Tian,Shusheng Xu
To improve the friction performance and service life of protective coatings in humidity-fluctuating environments, porous hard titanium nitride (TiN)–molybdenum disulfide (MoS2) composite coatings were prepared by using direct current magnetron sputtering (DCMS) with the mode of oblique angle deposition (OAD) and chemical vapor deposition (CVD) technologies. The structure and chemical component were characterized by field emission scanning electron microscopy (FESEM), energy dispersive spectrometer (EDS), grazing incidence X-ray diffraction (GIXRD), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The tribological properties of these TiN–MoS2composite coatings were investigated. The results indicate that the porous TiN–MoS2composite coating exhibited outstanding friction performance and long service life under humidity-fluctuating environments. At the initial 20% relative humidity (RH) stage, the MoS2on the porous TiN–MoS2composite coating surface worked as an effective lubricant; thus, the coating demonstrated excellent lubrication performance, and the friction coefficient (COF) was about 0.05. As the humidity was alternated to 70% RH, the lubrication effect diminished due to the production of molybdenum oxide (MoO3), and the COF was about 0.2, which was attributed to the degradation of MoS2on the wear track and the release of fresh MoS2from the porous TiN matrix. After the environmental conditions shifted from 70% to 20% RH, the MoO3was removed, and the lubrication effect was restored. In summary, TiN–MoS2porous composite coating offers a promising approach for lubrication in humidity-fluctuating environments.
研究领域:
材料科学
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表面工程
·
摩擦学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
A-Jun Chang,Chao-Hua Xue,Jiao-Jiao Sun,Meng-Xia Shen,Xiao-Jing Guo,Bing-Ying Liu,Meng-Chen Huang,Jing Li,Hong-Wei Wang
Radiative cooling, as a sustainable and environmentally friendly cooling technology, holds promise for effectively addressing global energy challenges. However, the primary challenge to radiative cooling materials lies in achieving a balance between cooling capacity and application performances, including mechanical strength, durability, and nighttime insulation. In this study, we have successfully developed a hierarchically porous radiative cooling coating using the composite of thermoplastic polyurethane and hydrophobic silica through a scalable phase separation method. This cooling coating can be applied to various common materials in daily life such as polyester, glass, aluminum plates, wood, and paper products. When applied to polyester fabrics, the fabricated hierarchically porous radiative cooling coating (PRCC) demonstrates high solar reflectivity of 92 %, strong infrared emissivity of 95 % with low thermal conductivity of 0.015 W m −1 K −1 , and favorable mechanical properties with a strength of 21.8 MPa, easy-cleaning features, exceptional durability to UV aging and high-temperature exposure. Outdoor testing results showed that the PRCC achieved an average diurnal cooling of 13.4 °C while exhibiting an average nocturnal warming of 1.5 °C. Furthermore, the PRCC maintains outstanding cooling performance even after twelve months of outdoor exposure. This work is expected to promote the long-term application of radiative cooling materials in outdoor settings.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rui Zhang,Yongfeng Yang,Hanli Zhang,Xiaoyang Ma,Jinjin Li
The accumulation of ice on the surfaces of equipment/facilities can result in energy wastage, substantial economic losses, and even pose a threat to personal safety. In this work, a three-dimensional (3D) liquid-based porous resin coating doped with oleophilic molybdenum carbide (Mo 2 C) MXene nanoflakes was fabricated on a pre-coated oleogel sealer layer of aluminum plate. The results showed a reduction of approximately 99.1 % in ice adhesion strength (∼4.66 kPa) compared to the sandblasted aluminum plate and consistently maintained ice adhesion strength below 10 kPa for 70 days. Moreover, the coating exhibited excellent photothermal properties, with icing time delayed by a factor of 33.2 under simulated solar radiation power of 96 mW/cm 2 (1 sun) at an ambient temperature of − 15 °C. The ice adhered to the coating could easily slide off without the external force under “1 sun” at − 10 °C. The superior anti/de-icing performance of the coating can be primarily attributed to the low interfacial modulus of the porous structure, the exceptional retention of silicone-oil, and the excellent photothermal effect of embedded MXene nanoflakes. The 3D liquid-based porous coating, possessing extremely low ice adhesion and remarkable de-icing stability, demonstrates the substantial potential for practical applications that require sustained anti/de-icing performance.
研究领域:
材料科学
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能源科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 38
·2203693
·
IF 15.153
Tao Zhu,Dongli Chen,Guoqing Liu,Peng Qi,Xiaoyu Gu,Hongfei Li,Jun Sun,Sheng Zhang
Lithium–sulfur batteries (LSBs) have attracted extensive attention owing to their high energy density and abundant sulfur resources. However, LSBs are still restricted by the unsatisfactory electrochemical performance resulting from the shuttle effect of lithium polysulfide (LiPSs), and the potential fire hazard caused by inflammable ether electrolytes and polyolefin separators. Herein, a facile immobilization strategy for hexachlorocyclotriphosphazene (HCCP) is creatively applied to address the above issues simultaneously. Insoluble HCCP cross-linked microspheres (H-CMP) are firstly obtained at ambient temperature using tannic acid (TA) as a cross-linking agent and then a multifunctional separator coating is constructed based on H-CMP. The released phosphorus-related radicals from H-CMP in wide temperatures effectively prevent the combustion of electrolytes and separators, and hence improve the fire safety of the Li–S pouch cell. Furthermore, H-CMP availably chemisorbs LiPSs to interdict the shuttle effect, thereby dramatically improving the electrochemical performance of LSBs. The effectiveness of this strategy is also verified in high sulfur loading (6.38 mg cm -2 ), high temperature (50 °C), and Li–S pouch cells. More importantly, H-CMP exhibits sufficient stability for Li metal and suppression of Li dendrites. This facile immobilization strategy for multifunctional phosphazenes provides a competitive option for the large-scale fabrication of high-safety and high-performance LSBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Li Li,Litao Yao,Lianjun Wu,Qingfang Ma,Jing Jiang,Shiyu Lin,Xufei Shen,Chengyi Huang,Lieping Sheng
Zirconia ceramics have become increasingly used as dental implant material which is mainly due to their “tooth-like” color, superior biocompatibility, and excellent mechanical properties . However, the bio-inertness of the zirconia surface limits its use for a wider range of clinical applications. To enhance the surface bioactivity, a combination of magnetron sputtering , and anodization has in the present study been used to deposit a homogeneous nano-porous coating (ZrNP) on the zirconia surface (forming ZrO 2 /ZrNP with a ZrNP pore diameter of 20–30 nm, and a ZrNP layer thickness of ∼2 μm). EDS and XRD analysis showed that the distribution of the surface chemical components, as well as the crystalline structure of the zirconia (ZrO 2 ), remained unchanged. On the other hand, the hydrophilicity of the ZrO 2 /ZrNP surface became significantly improved (as compared with a control group). In addition, the bond strength of the coating was decreased as a result of the anodization treatment. Moreover, both the Zr and ZrNP nanolayers exhibited improved proliferation and osteogenic properties in the in vitro cell experiment. Also, the ZrNP nanolayer was found to promote the biocompatibility and osteogenic ability to the largest extent. The ZrNP nanolayer did also provide numerous adhesion sites for MC3T3-E1 whereby the cell morphology could be enhanced. Additionally, the nano porous ZrNP layer improved the new bone formation around the zirconia implant and did robustly enhance the push out bond strength, thereby indicating the best osteointegration ability. In conclusion, a nano porous zirconium layer has been found to be very promising for the improvement of the bioactivity of the zirconia implant material.
研究领域:
生物材料学
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口腔医学
·
组织工程学
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2024
·
IF 5.3
Jinrui Liang,Kai Le,Yuzhen Liu,Young-Jun Jang,Fengchun Jiang,Zhenlin Yang,Haixin Li,Shusheng Xu,Weimin Liu
To improve the friction and wear performance of coatings in aerospace engineering under wet and dry alternating conditions, the porous hard TiCN coating was prepared by a combination of multi-arc ion plating and oblique angle deposition. The study found that when the titanium target current was reduced from 80 A to 60 A, the pore size of the porous TiCN coating increased from 0.30 μm to 0.93 μm. In comparison to the low hardness of stainless steel substrate of 3.4 GPa, the hardness of TiCN coatings with pore sizes of 0.93 and 0.30 μm rose to 10 and 22 GPa, respectively. The existence of pores can effectively improve the hydrophilicity of the coatings. However, as the pore size increased, the anti-wear lifetime of the coatings were also decrease. This process was followed by ultrasonication and hydrogen reduction of (NH 4 ) 2 MoS 4 to infuse MoS 2 directly into the pores to fabricate the TiCN-MoS 2 composite coatings. The findings revealed MoS 2 atomic sheets are randomly embedded in the pores of the TiCN coating. In a stable humidity environment, as the relative humidity increased, the friction coefficient of the TiCN-MoS 2 porous composite coating increased and the anti-wear lifetime decreased. In addition, the anti-wear lifetime of the TiCN-MoS 2 porous composite coating at 20 % relative humidity environment is 128,322 laps, which exceeded the 38,099 laps of the dense TiCN-MoS 2 composite coating. This proved that the porous composite coating had better anti-wear lifetime due to the continuous release of MoS 2 in the pores under low humidity conditions. The tribological behavior of the porous composite coatings was systematically investigated under alternating humidity conditions, with a comparison against the dense TiCN-MoS 2 composite coatings. The porous composite coatings possessed better self-adaptation under alternating humidity conditions, with coefficients of friction of 0.05 and 0.15 at 10 % and 70 % RH air, respectively. A detailed discussion was conducted on the relationship between tribofilm composition and tribological properties under different humidity environments.
研究领域:
材料科学
·
表面工程
·
航空航天工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2024
·
IF 6.5
Siqi Zhang,Feng Zhang,Juanjuan Su,Jian Han
Passive daytime radiative cooling technology is a highly efficient cooling technology with zero energy consumption. When utilized for personal thermal management, radiative cooling textiles are capable of finely regulating the temperature of the human skin microenvironment. This study presents a cellulose acetate (CA) hierarchical porous coated textile that accomplishes high reflectance of sunlight over the full wavelength range, with a low cost and scalability, and a simple preparation procedure. With a high reflectance of 0.91 in the solar wavelength band and a high emissivity of 0.95 in the atmospheric window wavelength band, the CA hierarchical porous coated textile offers exceptional spectrally selective performances. It manifests a subambient cooling temperature of up to 19.0 °C and a skin overheating prevention effect of up to 4.2 °C. Furthermore, the coated textile possesses promising abrasion resistance, acid-alkali corrosion resistance, and mechanical properties. The present work provides a facile path for the development of green-based radiative cooling coated textiles.
研究领域:
材料科学
·
纺织工程
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Yunjiao Gu,Hongyu Liu,Jinglong Yang,Shuxue Zhou
The competing constraints, associated with different features such as wettability, optical transparency, anti-reflectivity, and anti-fouling properties, set back the progress of developing multi-functional coatings in an easily-accessible manner. Herein, polyvinyl alcohol (PVA)/SiO 2 coatings with combined reflection-reducing, anti-fogging, and underwater contamination-reducing performances were successfully fabricated from the immersion-curing process assisted with ultrasonic dispersion of silica nanoparticles (NPs). The effects of SiO 2 dispersion method, thickness and SiO 2 particle size on surface properties were systematically investigated. The designed two-stage process was underlined for the first time to be pivotal, during which the initial ultrasonic dispersion rendered the coating transparent, while immersion-curing further repressed its surface reflection. Coexistence of high hydrophilicity with high transmittance has been realized in the as-prepared coatings containing highly-dispersed fumed silica A200 NPs, resulting in a multi-functional surface equipped with anti-fogging, anti-reflection, self-cleaning and underwater anti-fouling properties. Additionally introducing bi-component acrylic polyurethane basecoat, the PVA/SiO 2 coatings were applicable on diverse substrates, including fragile ones.
研究领域:
材料科学
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表面工程
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 9
·期 9
·5606-5618
·
IF 11.301
Qingping Wu,Zhenguo Yao,Aochen Du,Han Wu,Minsong Huang,Jun Xu,Fahai Cao,Chilin Li
The fragility of the natural solid electrolyte interphase (SEI) and deformability of the naked Li anode cannot meet the requirements of high coulombic efficiency (CE) and long-period cycling for Li metal batteries (LMBs). Accordingly, conductive porous anode hosts with surface decoration/defect modulation appear to be an effective solution to restrain the growth of Li dendrites. Herein, we propose an unusual oxygen-defect-rich nanoporous MgOx coating bonded with carboxyl-rich carbon wires (MgOx–C), which act as a 3D monolithic host and artificial SEI film simultaneously, to achieve dendrite-free LMBs. The enrichment of the lithiophilic (carboxyl groups) and anionphilic (oxygen defects) sites could homogenize the Li deposition process, accommodate the anode volume variation, and mitigate the depletion of the space charge. The highly defective MgOx enabled fast charge transfer, thus result in a high-rate Li plating performance. The initial nucleation and following plating behaviors of Li were significantly optimized by the conversion and alloying reactions between the Li and MgOx domains. The resultant Li@MgOx–C electrode enabled a stable Li plating/stripping process with a low overpotential and high CE, even under the high plating capacity of 10 mA h cm−2 and high current density of 15 mA cm−2.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
PROGRESS IN ORGANIC COATINGS
·
2018
·
IF 2.955
Xiaopeng Xiong,Fei Xie,Jiaqi Meng
In this work, an organic coating film was designed to have a porous microstructure together with a rough surface, and its matrix was covered with a low surface energy layer, so that it can be employed for oil/water separation based on its superhydrophobicity and superoleophilicity. First, a mixture solution of poly(styrene- block -butadiene- block -styrene) (SBS) and polydimethylsiloxane (PDMS) prepolymer was sprayed onto stainless steel mesh in a non-solvent vapor atmosphere of ethanol. After solvent evaporation, a porous coating film has been obtained. The film matrix was formed from SBS to have a nodular-microstructure, which was covered by the highly flexible PDMS prepolymer. Then, the PDMS prepolymer was cured to cover the nodular microstructure at 60 °C, which was chosen to be far below the glass transition temperature of polystyrene block of SBS in order to maintain the formed nodular microstructure. The microstructures of the obtained coating films were carefully characterized and analyzed. Water and oil contact angles on the coating films were measured to indicate their wetting properties of superhydrophobicity and superoleophilicity. The oil diffusion speed along the coating film and the oil swelling behavior were examined to suggest the advantages of the covering PDMS layer. The coating films have been employed for oil/water separation through self gravity-driven filtration, where oil could penetrate the coating film automatically while water retained. The oil separation rate was found to be higher than 99.0% and the flux was estimated to be greater than 162 L∙h −1 m −2 . Moreover, the cycling tests suggest the satisfactory reusability of the coating film, implying its potential applications in oily wastewater treatment or oil spill recovery.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
iScience
·
2022
·
IF 6.107
Meijie Chen,Dan Pang,Hongjie Yan
Passive daytime radiative cooling (PDRC) can dissipate heat to outer space with high solar reflectance ( R ¯ solar ) and thermal emittance ( ε ¯ LWIR ) in the atmospheric transmission window. However, for the non-contact heat dissipation, besides the high R ¯ solar , a high infrared transmittance ( τ ¯ LWIR ) is needed to directly emit thermal radiation through the IR-transparent coating to outer space. In this work, An IR-transparent porous PE (P-PE) coating with R ¯ solar = 0.96 and τ ¯ LWIR = 0.88 was prepared for non-contact heat dissipations. Under the direct sunlight of 860 W m −2 , the IR-transparent coating obtained a 4°C lower heater temperature than the normal PDRC coating under the same condition. In addition, the spectral reflectance of the P-PE coating after immersing in air or water changed little, which showed excellent durability for long-term outdoor applications. These results indicate the P-PE coating can be a potential IR-transparent coating for non-contact heat dissipations under direct sunlight.
研究领域:
材料科学
·
能源工程
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）