JOURNAL OF MEMBRANE SCIENCE
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2021
·
IF 8.742
Zhigao Zhu,Guangming Tan,Di Lei,Qiyu Yang,Xiao Tan,Ningning Liang,Dehua Ma
Membrane distillation (MD) is an attractive desalination technology for further recovering highly concentrated brines with the advantages of high water recovery and salts rejection efficiency. However, advancing flux and tackling scaling of MD membrane are ongoing challenges due to the increasing temperature and concentration polarizations during the concentration process . Herein, we systematically investigated the membrane interface structure and common operating conditions on membrane flux and scaling resistance using reverse-osmosis concentrated seawater (ROCS) as a typical target. The results revealed that increasing membrane roughness, feed/permeate flow rate, and temperature gradient of membrane two surfaces could effectively improve membrane flux. Nevertheless, excessive feed/permeate flow rate and temperature gradient would accelerate membrane scaling due to enhanced disturbance to the membrane surface. The optimal membrane operated at a temperature gradient of 40 °C and a feed/permeate flow rate of 240 mL min −1 showed a high initial flux of ~48 L m −2 h −1 and an excellent water recovery ratio of 68.09% with the conductivity of distilled water lower than 11.72 μS cm −1 . In addition, the scaling resistance and flux of commercial antiscalants in ROCS on the differently wettable membrane interface were also systematically evaluated. These findings potentially transform MD to be a viable technology for concentrating ROCS using low-grade-thermal energy.
研究领域:
环境科学
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材料科学
·
水处理工程
✓ 已验证
产品关联
DOI
高影响因子
KEY ENGINEERING MATERIALS
·
2020
·
IF 0
Rui Hua Wang,Ai Xia Chen,Chao Yang,Fang Wang,Ming Han Xu,Shi Bin Li,Jie Guang Song,Lin Chen
In this paper, the effect of sintering temperature on the interfacial structure of the composite was investigated and three different formulation groups were used to compare the respective properties. To obtain a composite material with excellent interface, the law between reference number and performance is obtained. Through mixing, molding, sintering, sample preparation, scanning electron microscopic observation, energy spectrometer observation and analysis, the following conclusions can be drawn: As the temperature increases, the density and hardness increase. The sample melts at 1500 °C, and there is no specific data. When the temperature reaches 1450 °C, the density and hardness reach the highest. When the formulation is Fe:Al2O3:SiO2=18:1:1 and the temperature reaches 1450 °C, the properties of the sample materials are optimized. The density is as high as 95% and the hardness reaches 42.9HBW.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Dou Hu,Guo-rui Zhang,Xiao-dong Qi,Jing-hui Yang,De-xiang Sun,Yong Wang
Carbon fiber (CF)-reinforced epoxy resin (EP) (E/C) composites are widely used in many fields, but their flame retardancy is usually low due to the “wick effect” of CF. Although interfacial self-catalysis can improve the flame retardancy of composites, the flame retardant efficiency remains low and the mechanical properties require optimization. This work proposed a novel method of assembling polyphosphazene (PZS) and zeolitic imidazolate framework-8 (ZIF-8) on the CF surface to synchronously enhance the flame retardancy and mechanical properties of E/C composites. With the aid of a small amount of 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) in EP matrix, the limit oxygen index (LOI) was enhanced to 45.1 % and the V -0 standard in UL-94 testing was also achieved. Compared to the blank E/C composite, the peak heat release rate (PHRR) and the total heat release (THR) decreased by 57.1 % and 47.0 %, respectively, while the tensile strength increased to 100.1 MPa, corresponding to an improvement rate of 102.2 %. The mechanisms were mainly attributed to the inhibition of the “wick effect” of CF by PZS and ZIF-8, the strong hydrogen bonding interaction between components, and the interfacial pinning effect of the rough CF surface. This work provides new interfacial structure design method for CF reinforced EP composites with great potential applications in many fields ranging from railway vehicles, new energy automobiles, aircrafts to energy and industrial equipment.
研究领域:
材料科学
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高分子化学
·
复合材料
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
·
IF 8.1
Fan Wang,Xiaodi Dong,Guangyi Liu,Baoquan Wan,Jinghui Gao,Baixin Liu,Jun-Wei Zha
Polyimide (PI) is widely used in electronic, electrical and communication fields because of its outstanding mechanical properties, electrical insulation and thermal stability. However, the lower thermal conductivity limits their application. Here, PI composite films with high thermal conductivity are obtained by utilizing reactive groups on the carbon nitride nanosheets (CNNS) surface to form covalent bond with PI matrix. The thermal conductivity of CNNS/PI composite films can reach 5.84 W∙m −1 ∙K −1 , which is about 10 times higher than that of pure PI (0.56 W∙m −1 ∙K −1 ). This is attributed to the covalent bond between CNNS and PI matrix acting as a “thermal bridge” to connect the discontinuities at the interface, thereby reducing the interfacial thermal resistance between CNNS and PI. The heat transfer mechanism of composite film is further revealed by finite element analysis . This work provides a viable solution to improve the thermal conductivity of PI, allowing for a wide range of potential applications for PI in electronic devices.
研究领域:
材料科学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2021
·Vol. 8
·期 7
·1810-1818
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IF 6.569
Yabin Ma,Bin Quan,Zhihui Zeng,Yunke Zhang,Lan Zhang,Yu Wang,Xiaogu Huang
Strong electromagnetic (EM) response at low thickness is urgently required to address the emerging EM radiation pollution. Among numerous methods to achieve electromagnetic response at low thickness, interface construction exhibits some advantages for the combination of numerous dissipation mechanisms. Here, ternary Mo-Ni2P/rGO absorbers with multiple interfaces are designed via the phosphating treatment at a certain temperature. The constructed heterojunctions can efficiently exploit the high-conjunction of Ni2P and rGO and the interactions between different dielectric media (metal/semiconductor/conductor) for excellent electrical conductivity, abundant interfacial polarizations, and rational combination of different loss materials. As the phosphating temperature increases from 600 to 800 °C, the Mo-Ni2P/rGO-800 sample exhibits excellent microwave absorption performance, where the reflection loss (RL) value is −35.43 dB, and the effective bandwidth reaches 3.48 GHz at only 1.20 mm. This study proposes a simple method to enhance the microwave absorption performance at low thickness based on the construction of heterojunction structures. Moreover, an insight into the role of integrating different loss mechanisms in achieving high-efficiency EM wave absorbers has been fulfilled.
研究领域:
材料科学
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电磁学
✓ 已验证
产品关联
DOI
高影响因子
Catalysis Science & Technology
·
2018
·Vol. 9
·期 1
·75-85
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IF 5.365
Ruyi Zhong,Zisheng Zhang,Shuqi Luo,Z. Conrad Zhang,Limin Huang,Meng Gu
Knowledge of the interfacial structure of nanocomposite materials is a prerequisite for rational design of nanostructured photocatalysts. Herein, TiO2 and g-C3N4 2D/2D nanocomposites were fabricated from three distinct synthetic protocols (i.e., co-calcination, solvothermal treatment and charge-induced aggregation), showing different degrees of enhancement (1.4–6.1 fold) in the visible-light induced photocatalytic hydrogen evolution reaction compared to the simple physical mixture. We propose that the interfacial Ti–O–N covalent bonding promotes the charge carrier transfer and separation more effectively than the electrostatic interaction, thus accelerating the photocatalytic H2 production. Meanwhile, the exposed surface area of TiO2 in the composite needs to be enlarged for deposition of the co-catalyst. This research sheds light on the rational design of hybrid nanocomposites based on earth-abundant elements for photocatalysis.
研究领域:
材料科学
·
光催化
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Fucheng Wang,Jiajun Li,Chunsheng Shi,Enzuo Liu,Chunnian He,Naiqin Zhao
Ceramic phase reinforced aluminum matrix composites (CAMCs) are widely used in high-tech fields represented by aerospace industry due to their advantages of high specific strength, high specific modulus, high thermal stability, and light weight. Strong interface bonding is a prerequisite for high performance of multiphase materials. Herein, a novel CAMC in situ reinforced by MgAl2O4 particles and MgAlB4 nanorods was prepared by vacuum hot-pressing combined with hot-extrusion process. A high-resolution transmission electron microscope was used to characterize the orientation relationship and interface structure between the ceramic phases and the aluminum matrix. Two orientation relationships (OR1 and OR2) of MgAl2O4/Al and one (OR3) of MgAlB4/Al are determined: OR1-[011]p//[011]Al, (11̅1)p//(11̅1)Al; OR2-[211]p//[011]Al, (113̅)p//(022̅)Al; OR3-[101̅0]R//[001]Al, (0002)R//(2̅20)Al. The MgAl2O4 in OR1 forms a coherent interface with the aluminum matrix at (111) surface, while they form a 4 × 5 near coincidence site lattice (CSL) interface structure for OR2. In OR3, the MgAlB4 forms an approximate coherent interface with Al matrix at its (0002) surface and a 2 × 5 CSL interface structure at its (011̅0) surface. First-principles calculations suggest that MgAl2O4 combines to aluminum at (111) plane through covalent bonds, which means high interfacial bonding strength. The hot-extrusion process makes the ceramic phase evenly distributed in the matrix. The mechanical properties of the composites are greatly improved compared with pure aluminum.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2017
·
IF 4.873
Chengfeng Zhang,Zhenghai Tang,Baochun Guo
Interfacial interaction plays a vital role in the final properties of polymer composites as it affects the filler dispersion and stress transfer in the composites. In this study, we utilized two types of phosphate ester, hydroxyethyl methylacrylate phosphate (PH) and butyl phosphate (PB), as modifiers in boehmite (BM)-filled styrene-butadiene rubber (SBR) to tailor the interfacial structures in the composites. The modification mechanism of phosphate ester on BM and the interfacial structure in the composites are characterized. In PH-modified BM/SBR composites, a covalently bonding interface is obtained because PH can act as molecular bridge that can form covalent linkage with both BM and SBR chains. Consequently, the resulting composites show significantly improvements in the physical and mechanical properties of the composites. While in PB-modified BM/SBR composites, the properties of the composites are slightly improved due to the lack of covalent linkage in the interface.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CATALYSIS
·
2023
·
IF 7.3
Qiangqiang Wu,Hanke Li,Guangxing Yang,Yonghai Cao,Hongjuan Wang,Feng Peng,Hao Yu
A variety of adsorbed intermediates have been extensively assigned during CO 2 hydrogenation on Pt/γ-Al 2 O 3 . However, the surface sites where the surface species reside have not been well resolved, which are extremely important to depict the reaction pathways of CO 2 hydrogenation. In the current work, surface species adsorbed on three regions were distinguished by in situ diffuse-reflectance infrared Fourier transform spectroscopy, i.e., contiguous Pt region of Pt nanoparticle, interfacial Pt int -O-Al int region between Pt nanoparticle and γ-Al 2 O 3 , and surface region of γ-Al 2 O 3 away from Pt nanoparticle. The dynamics of adsorbed H species, carbonyl species, bicarbonates, formate species, and adsorbed CO 2 , were identified at different sites, proving that the reaction occurs at the Pt/γ-Al 2 O 3 interface. We found that only the C-containing species at the Pt perimeter are directly active intermediates for the reaction. Such spatial analysis bridges the gap between the hydrogen activation and CO 2 activation, providing a deep understanding of CO 2 hydrogenation. In addition, the interface structure with oxygen vacancy is important for CO 2 activation, driving the reaction through carboxylate (*HOCO) pathway to form CO at the interface rather than formate (*HCOO) pathway and then be hydrogenated at the Pt surface.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2023
·
IF 6.4
Xiaohao Sun,Xiao Wang,Tongxin Di,Debao Liu
In the present study, MXene-reinforced Mg matrix composites were manufactured via the electrostatic self-assembly protocol and spark plasma sintering (SPS) process to develop lightweight materials with high mechanical performance. Uniform dispersion of MXene sheets was achieved in MXene/AZ91 composites. A unique interfacial structure was confirmed in these composites, which exhibited an ultrafine MgO interlayer (grain size of ∼10 nm) coherently incorporated or intercalated into MXene layers. The unique interfacial structure contributed to robust interfacial bonding between MXene sheets and Mg matrix, resulting in a substantial mechanical performance enhancement. The yield strength of 325.3 ± 7.9 MPa and elongation of 8.8 ± 0.2% were achieved in 0.3vol% MXene/AZ91 composites, showing a significantly high strengthening efficiency of 159.1 without sacrificing ductility. Quantitatively investigation of strengthening behavior manifested that the load-transfer effect was the primary strengthening mechanism in MXene/AZ91 composites, and the simulated strength was well-matched with experimental results due to the special interfacial structure and excellent dispersion properties. This study could offer significant guidance for developing novel lightweight materials with high mechanical performance for structural applications.
研究领域:
材料科学
·
力学
✓ 已验证
产品关联
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Bomin Feng,Jun Chen,Yifei Yang,Mao Yang,Hongbing Wang,Changyin Zhong,Yawei Hao,Jinhua Yang,Jian Jiao,Yunxi Yao
It is vital to understand the BN/SiC interface formation process. In this work, we choose 4H–SiC (0001) single crystalline surfaces as substrates to grow BN thin films by chemical vapor deposition with a borane-ammonia complex precursor. The chemical composition, surface morphology , and crystalline phase of the prepared BN/4H–SiC (0001) thin films were comprehensively characterized with XPS, Raman, AFM, SEM and TEM techniques. With the optimized preparation conditions, BN thin films with high crystallinity and low oxygen content (2.8 at%) can be fabricated. Three key factors of pretreatment of precursor, pyrolysis temperature, and post heat treatment have great effect on the growth of BN thin films. The successfully prepared BN/SiC (0001) thin films with the optimized growth conditions provide an ideal model system to study the influence of the various growth parameters on the quality of the BN thin films and the interface structures .
研究领域:
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yajing Hu,Yong Men,Shuyi Xu,Yuanfen Feng,Jinguo Wang,Kaijie Liu,Yibo Zhang
Constructing the interface of Ni/Y 2 O 3 heterogeneous catalyst is a feasible strategy for efficient catalyst design in CO 2 methanation, which can create the active Y–O–Ni interfacial sites by utilizing the interaction between Ni and Y 2 O 3 . In this work, the strategy of using different nickel precursors (nickel nitrate, nickel acetate, basic nickel carbonate and nickel citrate) was used to prepare various Ni-based catalysts supported on Y 2 O 3 , which were estimated for their catalytic performance on CO 2 methanation. The catalysts were characterized based on BET, XRD, TEM, H 2 -TPR, XPS and CO 2 -TPD, etc. The results indicated a close correlation between the metal dispersion and particle size of Ni/Y 2 O 3 catalysts and the nickel precursor employed. The Y–O–Ni interface structure in Ni/Y 2 O 3 catalysts, associated with basic sites, provides a richer source of basic sites, offering more active sites for CO 2 adsorption and activation. Ni/Y 2 O 3 catalyst prepared with nickel nitrate as the precursor exhibited characteristics such as a highly enhanced nickel dispersion, a smaller nickel particle size, and more abundant metallic Ni 0 sites. Moreover, nickel nitrate-derived Ni/Y 2 O 3 catalyst exhibited optimal catalytic activity, achieving a CO 2 conversion rate of up to 92 % at 300 °C, with 100 % selectivity to CH 4 , and displaying good stability over 30 h. Therefore, the dispersion of Ni and the size of Ni particles could be controlled by adjusting the precursor, which is closely associated with the catalytic activity of Ni/Y 2 O 3 catalyst. This work unveils the interface-property relationship of Ni/Y 2 O 3 catalysts and provides a new insight into strategy of constructing more effective Ni-based catalyst for CO 2 methanation through the controlled nickel precursor.
研究领域:
催化化学
·
材料科学
·
环境科学
✓ 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）