METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
·
2024
·
IF 2.4
Chen Zhuo,Yu Binqi,Yao Tingfeng,Du Weitong,Ma Jianchao
The wettability and reaction behavior of mold flux with different basicity on TiN and TiO 2 substrates were investigated at up to 1400 °C by the sessile drop method, which can provide a theoretical basis for optimizing the composition of the mold flux for high Ti-bearing steel. As the basicity increased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiN. Thus, it was easier to absorb the TiN inclusion in the order of CaO–SiO 2 -based flux (CS) > CaO–SiO 2 –Al 2 O 3 -based flux (CSA) > CaO–Al 2 O 3 -based flux (CA). Scanning electron microscopy coupled with energy-dispersive spectroscopy showed that the interfacial reaction was also related to basicity. There was a visible and regular interfacial reaction layer between TiN and CS and the CSA flux, which was produced by the redox reaction between the SiO 2 in the slag and the TiN substrate, whereas there was no interfacial reaction layer between TiN and the CA flux. As the basicity decreased, the mold flux exhibited better wettability and a stronger interfacial reaction with TiO 2 ; thus, it was easier to absorb the TiO 2 inclusion in the order of CA > CSA > CS. There was also a visible and regular interfacial reaction layer between TiN and the three fluxes, which was produced by the dissolution of TiO 2 and then reacted with CaO to generate CaTiO 3 .
研究领域:
冶金学
·
材料科学
✓ 已验证
DOI
高影响因子
POLYMER DEGRADATION AND STABILITY
·
2024
·
IF 6.3
Yitong Ding,Mingjiao Li,Wenjing Dong,Ze Kan,Zhibo Li
Chemically synthesized poly(4-hydroxybutyrate) (P4HB) serves as an alternative material for toughening poly(lactic acid) (PLA), but the two materials exhibit poor compatibility, and most compatibilizers fail to localize at the phase interface, resulting in inefficient toughening. In this study, a phase interface-located reactive compatibilizer, poly (glycidyl methacrylate) (PGMA), is synthesized to enhance the interfacial adhesion between PLA and P4HB, thereby improving their compatibility. The PGMA compatibilizer demonstrates a tendency to selectively disperse at the phase interface of PLA and P4HB supported by thermodynamic calculations. Compared to the PLA/P4HB blend, the PLA/P4HB/PGMA blend exhibits enhanced molecular chain entanglement and a blurrier phase interface. Consequently, the mechanical and shape memory behavior of the PLA/P4HB/PGMA blend are improved. For example, the elongation at break of the PLA/P4HB/PGMA blend increased from 20.8 % to 265.1 %, marking an increase of 12.7 times compared to the PLA/P4HB blend. Due to its small molecular weight, the T o n e s e t (onset degradation temperature) of PGMA is only 180.3 °C. Fortunately, the T o n e s e t of the PLA/P4HB/PGMA system exceeds 220 °C after the chain expansion reaction, indicating a significant improvement in thermal stability. Thus, the phase interface-located chain expansion reaction offers an effective approach to improving the compatibility of PLA/P4HB blends while maintaining their high thermal stability.
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 MATERIALS SCIENCE
·
2018
·Vol. 54
·期 5
·4115-4123
·
IF 2.993
Zhou Xiang,Zhu Ying,Ke Xiang,Zhang Kaili
In this study, we use simultaneous differential scanning calorimetry and thermogravimetric analysis to analyze the solid-state reaction characteristics of Al/Fe 2 O 3 nanothermites before n -Al melts. Different experimental setups for thermal analysis are compared, and the heat-release characteristics are studied on Al/Fe 2 O 3 nanothermites in the form of powder and pellet, respectively. It is found that protection provided by mere argon flow is far from enough for thermal analysis of Al/Fe 2 O 3 nanothermites. The experimental setup must be free of oxygen; otherwise, the determined exothermic peak is mostly the oxidation of n -Al by the residue oxygen molecules in the furnace body, due to the high reactivity and moderate accessibility of free oxygen molecules. Under proper experimental setup, it is found that besides the redox reaction between n -Al and n -Fe 2 O 3 , intermetallic reaction also occurs to form Fe 4 Al 13 . Moreover, the intermetallic reaction is more noticeable for nanothermite pellet than for nanothermite powder, and the eutectic reaction of Fe 4 Al 13 and n -Al leads to melting peaks below 655 °C. The results indicate that instrument configuration and sample status affect the testing results to a large extent, and one should be prudent to derive reaction characteristics of nanothermites.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Jinxin Xie,Xukai Li,Weirui Chen,Xianglin Sun,Kexin Chen,Yiming Tang,Laisheng Li
The mesoporous core-shell CeO x @SiO 2 was synthesized and characterized by XRD, pyridine-FTIR, BET, SEM, TEM and XPS. CeO x @SiO 2 was the hollow nanosphere with high surface area of 1291.4 m 2 g −1 , which benefited for mass transfer of reactants. CeO x @SiO 2 exhibited the excellent catalytic activity for oxidizing oxalic acid (OA) in O 3 /H 2 O 2 /CeO x @SiO 2 . The greatest OA mineralization (91.2%) was achieved at pH = 3.2 in O 3 /H 2 O 2 /CeO x @SiO 2 , which was 5.5 times higher than that in peroxone (O 3 /H 2 O 2 , 15.9%). Influence of pH, HSO 3 − , PO 4 3− and detection of ozone and H 2 O 2 concentration were conducted to explore the mechanism. The interface reaction played vital role for OA removal in O 3 /H 2 O 2 /CeO x @SiO 2 process. Protonated surface hydroxyl groups (Ce-OH 2 + ) was the active sites, where OA, O 3 and H 2 O 2 were chemi-absorbed. The peroxide-like species (≡(Ce(IV)-O 2 H 2 )) formed by the complex of H 2 O 2 with active sites were the important intermediates, which initiated ozone decomposition into hydroxyl radical (·OH) and led to the high OA mineralization. Moreover, Lewis acid sites and electron transfer effect of Ce(III)/Ce(IV) also accounted for the high catalytic activity of CeO x @SiO 2 . In addition, CeO x @SiO 2 maintained stable structure and catalytic activity in three cycles.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2024
·
IF 27.4
Jinyi Li,Yang Liu,Jiejun Zeng,Siyu He,Xitong Zhu,Xiaoyue Sun,Yizheng Jin
Tin-based perovskites are more environmentally friendly than their lead-based alternatives. Perovskite light-emitting diodes (PeLEDs) using iodide-based tin perovskites have achieved considerable advancements in efficiency. However, PeLEDs using bromide-based tin perovskites have not progressed as rapidly, primarily due to challenges in controlling their crystallization processes. Here, an interfacial reaction-assisted crystallization method is introduced to achieve bright and efficient CsSnBr 3 PeLEDs. It is started by forming an intermediate phase through the coordination of SnBr 2 with ethylenediamine derivatives. Subsequently, a protonation reaction is designed between the intermediate phase and the acidic polyethylenedioxythiophene: poly(styrene sulfonate) hole-transport layer to generate high-quality CsSnBr 3 films. Additionally, the use of potassium thiocyanate additives effectively enhances the photoluminescence efficiency of the CsSnBr 3 films. These efforts result in CsSnBr 3 -based PeLEDs achieving a maximum luminance of 787 cd m −2 and a peak external quantum efficiency of 0.91%, demonstrating the most efficient and brightest CsSnBr 3 -based PeLEDs to date. This work opens an avenue to better control the crystallization of tin-based perovskite.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Jingwen Luo,Mingshuo Cui,Xiaodong Lian,Bin Yuan,Chenhao Song,Yingchao Ma,Yapei Wang
The multicomponent structure and the large area of oil–water interfaces make multiple emulsions promising for use in cosmetic manufacturing, food industries, and agricultural production. However, the high energy input and extensive use of emulsifiers in the process of multiple emulsion preparation severely limit their application. In this work, we propose a simple but highly efficient emulsification strategy to realize one-step multiple emulsions. To this end, the interfacial acid–base neutralization reaction by oleic acid and ammonia is employed as the driving force to construct a spontaneous emulsifying system, thus realizing emulsion formation in a low-energy manner. Moreover, the products generated by the interfacial neutralization reaction can act as emulsifiers to stabilize both the O/W and W/O interfaces and construct multiple emulsions with an O/W/O structure. Compared to conventional methods of multiple emulsion formation, the one-step multiple emulsion method driven by an interfacial neutralization reaction can significantly reduce the energy consumption and the emulsifier dosage during the emulsifying process, thus avoiding the probable environmental problems caused by the residual emulsifiers. This study not only provides a new idea for the preparation of multiple emulsions but also effectively promotes the development of low-surfactant emulsification methods.
研究领域:
化学工程
·
材料科学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yueqi Wu,Xing Gu,Mingyong Jia,Qiang Shen,Fei Chen
A reliable joining between silicon nitride (Si 3 N 4 ) ceramics and metallic molybdenum (Mo), which possess significantly different physical properties, is successfully achieved through powder metallurgy and gradient composite technology. The interfacial reaction mechanisms between Si 3 N 4 and Mo at various compositional layers are systematically investigated under a sintering temperature of 1500 °C. Based on the elucidated reaction pathways and the concentration distribution index (p), the structure of the transition layer in Si 3 N 4 /Mo x Si y /Mo functionally graded materials (FGMs) is effectively optimized. By eliminating the intermediate layers where severe reactions induce excessive porosity, the overall densification and interfacial integrity of the graded structure are significantly enhanced, thereby improving the mechanical performance of the composite. The results indicate that Si 3 N 4 and Mo primarily react via diffusion between Mo and Si to form molybdenum silicides, following the reaction sequence: (Mo + Si) → (Mo 3 Si/MoSi 2 + Si) → (Mo 5 Si 3 ). At a concentration distribution index of p = 1.5, the flexural strength of the Si 3 N 4 /Mo x Si y /Mo FGMs reaches a maximum value of 371.4 MPa. Furthermore, the elemental distribution across the optimized transition layers exhibits a quasi-continuous gradient profile, indicating excellent structural continuity and robust interfacial bonding.
研究领域:
材料科学
·
冶金学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Qipeng Zhang,Kecheng Pan,Mengmin Jia,Xiaoyan Zhang,Lan Zhang,Haitao Zhang,Suojiang Zhang
Poly(ethylene oxide) (PEO)-based solid state batteries is one of the most attractive candidates for next-generation high performance energy storage devices, especially when it matches the LiCoO 2 cathode of high volumetric energy density. However, cathode/electrolyte interface reactions will be triggered at high voltage, leading to high interfacial resistance and fast capacity decay. In this work, a selected ionic liquid , 1-methyl-1-propylpiperidinium tetrafluoroborate (PP 13 BF 4 ), is prepared and applied in LiCoO 2 electrode operating at high work voltages of 3.0–4.3 V to regulate the interface. Electrochemical impedance spectroscopy and holding test indicate that facilitated by the PP 13 BF 4 , the cathode/electrolyte interfacial reaction is effectively suppressed and the resistance is reduced. When an optimal content, 2 wt%, PP 13 BF 4 is added into the LiCoO 2 electrode, the solid-state lithium metal cell delivers an initial discharge capacity of 125.1 mAh g −1 under the current density of 0.05 C at 55 °C, which is almost twice that of bare electrode. Meantime, it retains 76.3% of its capacity in 100 cycles under 0.2 C rate. Further characterizations illustrate that PP 13 BF 4 participates in the formation of a protective CEI, which effectively suppresses parasitic reactions between electrolyte and electrode. This work provides a facile and practical idea for the development of 4 V class solid state lithium metal batteries .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Yue Zhang,Xuyan Gao,Chunhua Xu
A non-uniform magnetic field was applied to sequester Cr(VI) with microscale zero-valent iron (ZVI). When the non-uniform magnetic field was applied, the average removal rate of Cr(VI) was increased and the lag phase was shortened with the increasing of magnetic field intensity . The instantaneous rate was fast at the beginning and about 40% of the Cr(VI) was sequestered rapidly when ZVI was added into the magnetic field system. Later, the sequestration rate of Cr(VI) was reduced and remained stable with time until Cr(VI) was removed completely. The instantaneous removal rate was positively correlated with ZVI dosage and the rate per unit mass of ZVI was 0.455 mg/(L·min·gZVI). The constant rate stage was not affected by the initial and the residual concentration of Cr(VI). In the case where no magnetic field was applied, the removal of Cr(VI) is a process in which ZVI is depassivated and its reactivity is restored continuously. The promotion of a magnetic field on the removal of Cr(VI) is mainly due to increasing the role of adsorbed reducing species of Fe 2+ or Fe 0 on the ZVI surface. Aging of ZVI under a magnetic field could enhance the release rate of Fe 2+ in the initial 5 min though the remanence of this kind of ZVI had little effect on the enhancement of the sequestration of Cr(VI).
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
·
2022
·Vol. 147
·期 16
·8657-8666
·
IF 4.755
Yan Tao,Ren Hui,Cui Qingzhong,Ou Yapeng,Guan Fayang
The interfacial reaction of nano-aluminum (nAl) and fluoropolymer was evaluated using nAl@Viton composite under slow and rapid heating rates. The results under slow heating rates indicate that nAl@Viton composites reacted in several stages at 100–1000 °C. The oxide shell of nAl underwent a pre-ignition reaction with Viton before Viton decomposition, followed by the reaction of nAl with the products from Viton decomposition, and defluorination of aluminum fluoride. Temperature jump experiments were used to confirm the occurrence of interfacial reactions between nAl particles with the products produced by Viton decomposition, and the gaseous products of nAl@Viton during the reactions were investigated via online gas chromatography/mass spectrometry. Results show a direct correlation between the nAl particles and the relative abundance of products. The initial decomposition products of Viton would be induced to form more cyclic hydrocarbon by the fluorination of nAl with gaseous fluorocarbons and hydrogen fluoride released from Viton decomposition. Fluorination yields heat feedback to the reactive surface, thus providing the main advantage of aluminum–fluoropolymer reactive system for energy release.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Hao Xiong,Anze Shui,Qingliang Shan,Mei Cai,Xiuan Xi,Bin Du
The SiO 2 layer preferentially generated on the surface of silicon carbide abrasives in Polishing Porcelain stoneware tile Residues (PPR) is corroded by silicate liquid during firing, resulting in continuous oxidation and foaming of silicon carbide, which makes the PPR difficult to be reused. The PPR is fired to form a silicate liquid that wraps micron silicon carbide in it. In this work, it is possible to study the corrosion of silicate to silicon carbide at high temperature by using two ( Ceramic-SiC ) and three ( Ceramic-SiO 2 -SiC ) layer structure model to simulate the corrosion of silicate to silicon carbide. The corrosion mechanism of SiC in PPR by silicate liquid during firing is revealed that the corrosion rate at its two sides (interfaces) determines the ultimate change in the thickness of the corrosion layer between the ceramic and the SiO 2 layer. Importantly, the corrosion layer thickness with time on the silicate-SiO 2 cross-section periodically presents wave-like changes, which can be attributed to the ionic migration between layers and the rate at which cations cross the corrosion layer when studying the three-layer model.
研究领域:
材料科学
·
陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2023
·
IF 4.2
Jiawen Fu,Chenxi Dong,Miaoli Hao,Xinping He,Dongyun Wu,Chunhai Yi,Suitao Qi
In this study, a highly hydrophilic membrane was developed by an interfacial reaction using two aqueous monomers for pervaporation (PV) desalination. Two water-soluble monomers, procyanidin (PC) and vinyl alcohol-vinylamine copolymer (VA-co-VAm), were applied to prepare membranes on hydrophobic polyvinylidene difluoride (PVDF) membranes through interfacial reactions. Catechol groups of PC were oxidized to quinone groups under weakly alkaline conditions, which could react with amino groups of VA-co-VAm to form a cross-linked network. The PVDF membrane was first dipped into a PC aqueous solution to form a thin PC liquid layer on the surface. Accompanied by the PC liquid layer, the PVDF membrane was then dipped into the VA-co-VAm solution to induce the interfacial reaction. The composition and structure of membranes were observed, and the effects of different factors on the desalination performance were investigated. By applying two aqueous monomers in the interfacial reaction process, the obtained thin membrane showed good hydrophilicity with a water contact angle of less than 42°. A water flux of 42.16 kg/(m2·h) at 60 °C was obtained by treating a feed solution (3.5 wt % NaCl). At all testing procedures, the salt rejection remained higher than 99.99%. Besides, the membrane displayed superior stability over 48 h of testing. According to the above results, the prepared membranes showed great potential in the process of PV desalination. This work provides a new approach for highly permeable PV membrane preparation through an interfacial reaction using two water-soluble materials.
研究领域:
材料科学
·
环境工程
✓ 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）