JOURNAL OF ALLOYS AND COMPOUNDS
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2021
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IF 5.316
Xiao-Lu Sun,Zan Liu,Zhi-Lin Cheng
The Cu-intercalated layered h-BN/N-doped carbon-nanofiber composite films (PAN-Cu/ABN-CNFs) were successfully prepared by the combination of the electrospinning technique and the one-pot carbonization process, using the mixed solution of polyacrylonitrile (PAN) and Cu-intercalated activated boron nitride (Cu/ABN) as carbon precursor. A series of characterizations proved that the PAN-Cu/ABN-CNFs possessed the distinguished merits in the structure and composition, such as the pore feature of the micropore (0.076 cm 3 /g)-mesoporous (0.3582 cm 3 /g) structure, the structure of the exfoliated h-BN nanosheets , the low-coordination high-content N (11.65 at%) and the existence of self-reducing Cu nanoparticles (0.5 at%). For adapting the actual application, the mechanical properties of the PAN-Cu/ABN-CNFs were comprehensively evaluated, showing that the PAN-Cu/ABN-CNFs films had the robust tensile strength and bending properties as well as the desirable wear resistance. Furthermore, the selective adsorption desulphurization of the PAN-Cu/ABN-CNFs were examined by the selective adsorption removal of thiophene (TH) from the simulated oil, indicating that the optimum adsorption capacity of the fresh films was up to 78.38 mg/g in 800 mg/L initial concentration and the adsorption capacity after the four-time regeneration recycling still approached 74.894 mg/g. Finally, the adsorption kinetics , isotherm and thermodynamic studies suggested that the adsorption behavior of TH over the PAN-Cu/ABN-CNFs should be better described by the correlation coefficients of Avrami fractional-order kinetics and Liu isotherm, while the thermodynamic studies showed a favorable exothermic and spontaneous adsorption mechanism.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 62
·36424-36433
·
IF 3.049
Xiuyun Zhang,Fan Wang,Yaping Zhu,Huimin Qi
Surface functionalized BN particles with grafted hyperbranched polyarylamide (BN-HBP) were prepared and used to improve the thermal conductivity and low dielectric constant of BN-filled cyanate ester resin (BN-HBP/CE) composites. The thermal stability, dielectric properties, thermal conductivity and dynamic mechanical properties of the BN-HBP/CE composites were investigated. The results illustrate that BN-HBP/CE composites with a load of 32 wt% exhibit a high glass transition temperature of 283 °C, low dielectric constant of 3.29 at 1 MHz, and a desirable thermal conductivity of 0.97 W/(m·K). Additionally, these novel materials exhibit a high decomposition temperature of 5% weight loss at 407 °C and low curing shrinkage of −0.64%. When the loading is 38 wt%, the thermal conductivity of BN-HBP/CE composites is 1.27 W/(m·K). These findings have significant implications for the preparation of high-performance substrates that meet the requirements for application as printed circuit board substrates.
研究领域:
材料科学
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电子工程
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产品关联
DOI
PubMed
高影响因子
CORROSION SCIENCE
·
2024
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IF 7.4
Xin Yuan,Rongcao Yu,Yilin Du,Bing Lei
To evaluate the barrier properties of the composite coatings reinforced by PDA (polydopamine)-BN@ZnO nano-pigments, the correlation between electrolyte transport characteristics and different nano-pigment contents in the composite coatings was studied. The electrochemical response of composite coatings was mainly controlled by non-Faraday process. A two-layer model based on Young's impedance was established to fit the non-Faraday process of the composite coatings from the 6th day of immersion. The coating resistivity varying with electrolyte transport could be used as a key parameter to describe the barrier properties of the coatings. At the same time, the explanation that different contents of nano-pigments enhance or weaken the barrier performance of composite coatings was given, that is, the nanoconfinement effect of the polymer under the effect of nano-pigments.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Zhicai Zhang,Heng Yuan,Fugang Qi,Nie Zhao,Biao Zhang,Xiaoping Ouyang
A high-performance BN@F-SiC filler was prepared by depositing hydrophobic nano-SiC grafted by γ-aminopropyltriethoxysilane (KH550) and 1H,1H,2H,2H-trifluoro-noctyltriethoxysilane (FAS) on h-BN grafted by glycidoxy-propyltrimethoxysilane (KH560). A coating containing 1 wt % composite was prepared by dispersing the composite material in epoxy resin (EP), and dispersion, wear resistance, corrosion resistance, electrochemical analysis, and other tests were performed. Also, the influence of h-BN and SiC quality ratios on these properties was systematically studied. The results showed that the BN@F-SiC (2:1) composite material had the best dispersibility in EP. The water contact angle for the coating reached 118°, which indicated that the coating is hydrophobic. The friction coefficient for the BN@F-SiC (2:1)/EP coating was reduced by 89.68% compared with that for the coating without any filler. The potential dynamic polarization test and the salt spray test showed that BN@F-SiC had excellent corrosion inhibition performance. In addition, an EIS test showed that the impedance value for the BN@F-SiC (2:1)/EP coating exceeded 1010 Ω·cm2 at a frequency of 10–2 Hz (|Z|0.01Hz) after 400 h of soaking, which is nearly 103 times higher than that obtained for the EP coating without a filler. This research helps establish a foundation for future research investigating the development of wear-resistant hydrophobic and anticorrosive coatings.
研究领域:
材料科学
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表面工程
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涂层技术
✓ 已验证
DOI
高影响因子
Polymers
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2025
·Vol. 17
·期 14
·1931
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IF 4.9
Jincheng Gui,Xu Liu,Hao Dou
The increasing demand for light and comfort smart wearable devices has promoted the cross-integration of textile technology with nanomaterials and nanotechnology. As a potential candidate with excellent piezoelectricity, PVDF has been processed into different forms used for flexible sensors but shows limited practicality due to their discomfort and stiffness from non-yarn level. In this study, PVDF/BN nanofiber yarns (NFYs) were successfully fabricated via conjugated electrospinning. The effects of BN concentration, stretching temperature, and stretching ratio on the structural morphology and mechanical performance of the NFYs were systematically investigated. The results show that under the stretching temperature of 140 °C and stretching ratios of 3.5, smooth 1% PVDF/BN NFYs with highly oriented inner nanofibers can be successfully fabricated, and the breaking strength and elongation of composite NFYs reached 129.5 ± 8.1 MPa and 22.4 ± 3.8%, respectively, 667% higher than the breaking strength of pure PVDF nanoyarns. Hence, with the selection of appropriate nanofiller amounts and optimized post-treatment process, the structure and mechanical property of PVDF NFYs can be significantly improved, and this study provides an effective strategy to fabricate high-performance nanoyarns, which is favorable to potential applications in wearable electronic devices and flexible piezoelectric sensors.
研究领域:
材料科学
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纳米技术
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柔性电子学
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聚合物纳米复合材料
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智能纺织品
✓ 已验证
产品关联
DOI
PubMed
高影响因子
POLYMER TESTING
·
2023
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IF 5.1
Xiaohang Sun,Ling Weng,Jingming Liu,Xiaorui Zhang,Lizhu Guan,Hao Chen,Wei Zhao
In this work, aluminum nitride particles (AlN) and boron nitride whiskers (BN w ) were surface-functionalized by polydopamine, and then novel composites were prepared by co-doping. By observing with transmission electron microscopy, we clearly saw that the surfaces of AlN and BN w were successfully coated with a thin polydopamine coating. This is beneficial to enhance the filler-matrix interface interaction and the filler dispersion. The co-doping of the two thermally conductive fillers increases the chance of contact between the filler and the filler, and reduces the interfacial thermal resistance, thereby forming a thermal conduction network more efficiently. The results show that at a frequency of 1 MHz at room temperature, the dielectric constant of 30 wt%AlN@PDA/6 wt%BN w @PDA/EP composites is 4.74 and the dielectric loss tangent is 0.0171. Its thermal conductivity is 0.40 W/(m·K), the glass transition temperature reaches 250.2°C, the impact strength reaches 6.89 kJ m −2 , and the breakdown field is 10.93 kV/mm.
研究领域:
材料科学
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复合材料
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热管理
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DOI
高影响因子
Sustainable Energy & Fuels
·
2021
·Vol. 6
·期 2
·440-448
·
IF 6.367
Xin Liang,Lulu Wang,Yang Wang,Yongchao Liu,Yi Sun,Hongfa Xiang
The functional design of separators has been proved to be one of the most efficient methods to improve the electrochemical performance of lithium–sulfur batteries. In this work, a multifunctional separator with gradual changes to four aspects was constructed by integrating a PVDF-HFP/h-BN membrane with a Co-doped carbon nanofiber. The architecture has four gradations, which offers multifold advantages. First, in terms of density, there is a transition from loose to dense, which results in a higher electrolyte uptake rate, reduces the amount of free electrolyte and further suppresses the shuttle effect. Additionally, in terms of composition, a transition from inorganic to organic is designed, which allows the inorganic and organic components to bind closely and reduces the interfacial resistance. Meanwhile, there is a transition from high electronic conductivity to insulation. The change in electronic conductivity leads to effective conversion of the polysulfide. Finally, in terms of ionic conductivity, there is a transition from low to high, which gives the separator better ability to conduct lithium ions. As a consequence, a battery with the as-constructed multifunctional separator performs with good capacity stability, which demonstrates a new concept for high-performance lithium–sulfur battery design.
研究领域:
材料科学
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储能技术
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电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Yang Hu,Dewei Ni,Bowen Chen,Feiyan Cai,Chunjing Liao,Yusheng Ding,Shaoming Dong
Electromagnetic interference (EMI) shielding materials with excellent load-bearing and high-temperature resistance have attracted much attention for both civil and military applications. In this regard, mechanically robust (bending strength of 246 ± 15 MPa) C f @BN/(CrZrHfNbTa)C–SiC high-entropy ceramic matrix composite with BN interphase was designed and fabricated in this work for highly EMI shielding performance and high-temperature resistance. As a result of the synergistic effect of multi-components, mean total EMI shielding efficiency (SE T ) of the composite with 3 mm thickness is up to 32.5 dB (higher than 99.9 % EMI shielding) in Ku-band. This indicates that thickness of the BN interphase has a remarkable effect on EMI shielding performance, indicating that the absorption coefficient ( A ) increases gradually with increasing BN thickness. The EMI shielding performance exhibit excellent high-temperature stability in an oxidation environment. Even after multiple high temperature oxidations in the temperature range of 400–800 °C, the composite remains outstanding EMI shielding performance. This study provides a structural and functional integrated EMI shielding material with a potential long service life at high temperatures.
研究领域:
材料科学
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电子工程
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Ji Shu,Yichong Zhang,Kanming Wang,Jianli Wang,Jiaxuan Ying,Hongyu Wang
Membrane filtration is regarded as one of the promising technologies for water treatment. However, insufficient micropollutants removal and membrane fouling still limited the further application. Herein, this study engineered a novel membrane hybrid system integrating typical pharmaceuticals removal and membrane self-cleaning by assembled layered MXene and hexagonal boron nitride (h-BN). By doping a small amount of MXene into h-BN (mass ratio of 1 to 10), the synergetic process of adsorption and photocatalytic degradation were achieved. Based on experimental and density functional theory (DFT) calculation results, the chemisorption-photodegradation performance of the membrane hybrid system assembled with 1/10 MXene@h-BN was significantly enhanced due to the termination group and conductive property of MXene. In addition, trimethoprim (TMP) degradation by the above membrane followed the Langmuir–Hinshelwood model, indicating pollutants removal initiated not only on the membrane surface but also in the bulk solution under simulated solar irradiation. This phenomenon was attributed to the generation of •OH and 1 O 2 by forming Ohmic contact with altered internal band structure. The durability and practical experiments with secondary effluent from local wastewater treatment were also tested. The exceptional self-cleaning performance of the membrane hybrid system assembled with 1/10 MXene@h-BN was demonstrated by lower membrane fouling and maintaining durability even after five cycles. Furthermore, the performance (both pollutants removal and flux) of the modified membrane for secondary effluent treatment was also considerable, validating its potential for practical application. Owing to the excellent features, the membrane assembled with MXene@h-BN is anticipated to be an ideal candidate for advanced wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
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2024
·
IF 4.1
Luo Fang-Hua,Dong Zhi-Tao,Chen Guo-Hua,Ma Chen,Wang Huai-Yuan
Janus films with asymmetric physical/chemical properties have attracted considerable attention due to their promising applications in personal thermal management, electronic skins, sensors, actuators, etc. However, traditional methods for fabricating Janus films conventionally need the assistance of an interface or auxiliary equipment, which are usually complex and time-consuming. Herein, flexible poly(vinyl alcohol) (PVA)/graphene oxide (GO)/h-BN (recorded as PVA/GO/h-BN) Janus films with thermally, optically, and electrically anisotropic properties are fabricated by a simple density deposition self-assembly method, which just utilizes the density difference between GO and h-BN during water evaporation. Experimental results show that the two sides of the acquired Janus films have obvious asymmetric characteristics. In the original state of the PVA/GO/h-BN Janus films, the thermal conductivity of the GO side (10.06 W·m −1 ·K −1 ) is generally lower than that of the h-BN side (10.48 W·m −1 ·K −1 ). But after GO is reduced, the thermal conductivity of the rGO side reaches 12.17 W·m −1 ·K −1 , surpassing that of the h-BN side. In addition, the relative reflectance of the h-BN side of Janus film is also significantly higher than that of the rGO side, and the surface resistance difference between the two sides is about 4 orders of magnitude. The prepared PVA/GO/h-BN Janus films show great application potential in human thermal management, light conversion switches, and electronic skins. This study provides a simple and versatile strategy for fabricating Janus films with multifunctional (such as thermal, optical, and electrical) anisotropies.
研究领域:
材料科学
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纳米技术
·
热管理材料
✓ 已验证
产品关联
DOI
高影响因子
CATALYSIS TODAY
·
2018
·
IF 4.667
Lingcong Li,Xiaojun Liu,Hong He,Ningqiang Zhang,Ziwen Liu,Guizhen Zhang
The MgO-doped hexagonal boron nitride (MgO-h-BN) nanomaterials were designed as a support for Palladium (Pd) catalysts for CO oxidation reaction. The catalytic properties of Pd/MgO(5)-h-BN catalyst was investigated and compared with Pd/h-BN catalyst. Transmission electron microscopy (TEM) results suggested that the PdO nanoparticles with small grain sizes (ca. 8 nm) were effectively dispersed on the surface of MgO, and the MgO were deposited on the h-BN nanosheets in the Pd/MgO(5)-h-BN catalyst. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses revealed that a small amount of Mg 2+ embedded into the B vacancies of h-BN nanosheets in the Pd/MgO(5)-h-BN catalyst. More significantly, a large amount of adsorbed oxygen appeared near the B vacancies of Pd/MgO(5)-h-BN catalyst. The experiments outcomes of diffuse reflectance fourier transform spectra analysis of CO (CO-DRIFT) indicated that the carbonate/formate species were easily decomposed to CO 2 on the Pd/MgO(5)-h-BN catalyst than Pd/h-BN catalyst, which might be a reason why the Pd/MgO(5)-h-BN catalyst had high CO oxidation activity. According to above analyses, we provide a new insight for the MgO-h-BN nanomaterials for Pd catalysts for application in CO oxidation reaction.
研究领域:
催化
·
材料科学
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化学
·
纳米技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2020
·
IF 3.807
Jinghui Zhu,Caiming Jiao,Tuo Kang,Liubiao Zhong,Sanfei Zhao,Yejun Qiu
Aiming to commercialize Li S battery, it is very important to achieve high sulfur loading alongside superior electrochemical performance. In this work, a novel composite material with sandwich structure constructed by titanium nitride nanoparticles and boron nitride‑carbon nanofibers (BNC-TiN-BNC), has been successfully prepared through electrospinning and spraying method, and applied as the interlayer in Li S batteries. Compared with the BNCNF interlayer, the sandwich-like BNC-TiN-BNC interlayer shows more excellent chemical adsorption for soluble lithium polysulfides (LiPSs) via the polar effects of the Ti S and S N bonds, and furthermore, the uniform distribution of TiN nanoparticles , filling in the pores between the nanofibers as packing layer of the BNC-TiN-BNC interlayer, can retard the migration of LiPSs more effectively by physical barriers. By introducing the BNC-TiN-BNC interlayer, the electron transfer , capacity and cycling life of Li S batteries have been improved significantly, especially at high current density . With the sulfur loading of 2.5 mg cm −2 , the cell with BNC-TiN-BNC interlayer delivers a high initial discharge capacity of 642.3 mA h g −1 at high current density of 2.0C, and the capacity remains 594 mA h g −1 with only the decay rate of 0.025% over 300 cycles.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）