JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2022
·
IF 6.364
Yunsong Liu,Yuying Gao,Enhui Wang,Guangyao Chen,Enxia Xu,Fei Zhao,Yunsong Zhao,Chonghe Li,Xinmei Hou
The interfacial behavior between CaAl 12 O 19 -MgAl 2 O 4 spinel (CA 6 -MA) crucible and molten wrought Ni-based superalloys during the vacuum induction melting process have been comprehensively investigated, with Al 2 O 3 crucible included for comparison. Experimental and theoretical results suggest that CA 6 -MA crucible exhibits higher thermodynamic stability and poor wettability to the superalloy melt. Benefited from these merits, the superalloy ingot with cleaner surfaces and more metallic luster is obtained in the CA 6 -MA crucible. Furthermore, the total oxygen content in the superalloy ingots obtained from CA 6 -MA crucible is 17.9 ppm, which is considerably lower than that from Al 2 O 3 crucible (29.7 ppm). These results indicate that CA 6 -MA crucible can be a promising candidate for melting wrought Ni-based superalloys.
研究领域:
材料科学
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冶金工程
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF POLYMER SCIENCE
·
2011
·Vol. 29
·期 3
·288-295
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IF 0.478
Xu Gao-fei,Zhu Wei-pu
P(AA-MA) copolymers composed of acrylic acid and methyl acrylate with different molecular weights and sequence structures were synthesized by combination of ATRP and selective hydrolysis. These copolymers were used as membrane materials to separate benzene/cyclohexane mixture by pervaporation. The effects of molecular weight and sequence structure of the copolymers on the pervaporation performance were investigated in detail. For the random copolymers, the permeate flux decreased rapidly with the increasing of molecular weight. The separation factor was also influenced by the molecular weight, which was changed from no selectivity to cyclohexane selectivity with increasing the molecular weight. Contrarily, the block copolymer membrane showed good benzene selectivity with separation factor of 4.3 and permeate flux of 157 g/(m 2 h) to 50 wt% benzene/cyclohexane mixture.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2023
·Vol. 47
·期 26
·12101-12108
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IF 3.3
Bin Li,Wenrui Hao,Jizhen Liu,Mengjing Zhou,Xiaojia Xu,Aolin Wu
Deep eutectic solvent (DES) was synthesized from choline chloride (ChCl) and acrylamide (AM), and P(AM-co-MA) hydrogels were prepared by adding different contents of maleic acid (MA) to DES by frontal polymerization. Fourier infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to characterize the hydrogels at the microscopic level, and the swelling properties, mechanical properties, self-healing properties and electrical properties of the copolymerized hydrogels were also investigated. The results showed that the equilibrium swelling of the hydrogels was significantly enhanced with the increase of pH due to the addition of MA. The hydrogel with the addition of MA has self-healing properties that pure PAM does not have. In terms of electrical conductivity, the increase of MA makes the internal structure of the hydrogel more loose, which is conducive to the passage of free ions. And there is a significant effect of different temperatures and different crosslinker contents on the electrical conductivity. In summary, we prepared a P(AM-co-MA) hydrogel that can produce significant property changes in response to changes in the external environment, which is expected to expand the application of hydrogels in flexible electronic materials.
研究领域:
材料科学
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化学工程
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生物医学工程
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产品关联
DOI
高影响因子
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2021
·
IF 3.927
Heng Wang,Ruihua Nan,Zengyun Jian,Changqing Jin,Yongxing Wei,Yaping Bai,Hulin Li
MAPbBr 3 perovskite crystals have attracted significant attention due to their outstanding performance in various optoelectronic applications . However, further understanding for the growth mechanism of MAPbBr 3 and its temperature-dependent variations of MA + should be addressed. In this study, MAPbBr 3 single crystal was grown using the inverse temperature crystallization method with a crystallization temperature of approximately 60 °C. Optical microscopy and atomic force microscopy were used to illustrate the surface structure of the resultant MAPbBr 3 . The results show that there is a layered growth mode with concave grooves and 2D nuclei on its surface. In situ variable-temperature Raman measurements were performed on the MAPbBr 3 crystal at a temperature range of 80–300 K. The narrowing of Raman bands unrelated to the phase transition of the crystal was observed around 100 K. By combining the variable-temperature X-ray diffractometry results from 80 to 105 K, the reason can be attributed to the lattice distortion and vibration within the crystals.
研究领域:
材料科学
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光学
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晶体学
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产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2017
·Vol. 134
·期 36
·45281
·
IF 1.86
Yijian Wu,Hui Zhang,Baoqing Shentu,Zhixue Weng
This work aimed at studying the role of poly(phenylene oxide) (PPO) and polystyrene (PS) in toughening polyamide-6 (PA6)/styrene-ethylene-butadiene-styrene block copolymer grafted with maleic anhydride (SEBS- g -MA) blends. The effects of weight ratio and content of PPO/PS on the morphology and mechanical behaviors of PA6/SEBS- g -MA/(PPO/PS) blends were studied by scanning electron microscope and mechanical tests. Driving by the interfacial tension and the spreading coefficient, the “core–shell” particles formed by PPO/PS (core) and SEBS- g -MA (shell) played the key role in toughening the PA6 blends. As PS improved the distribution of the “core–shell” particles due to its low viscosity, and PPO guaranteed the entanglement density of the PPO/PS phase, the 3/1 weight ratio of PPO/PS supplied the blends optimal mechanical properties. Within certain range, the increased content of PPO/PS could supply more efficient toughening particles and bring better mechanical properties. Thus, by adjusting the weight ratio and content of PPO and PS, the PA6/SEBS- g -MA/(PPO/PS) blends with excellent impact strength, high tensile strength, and good heat deflection temperature were obtained. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017 , 134 , 45281.
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
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Xia Zhang,Haibo Wang,Lianke Gou,Lanpeng Li,Aijun Duan,Zhengkai Cao
Serial VPO catalysts with different crystal structures were prepared by adjusting the ratios of air and N 2 in the calcination process. The precursors and vanadium phosphorus oxide (VPO) catalysts were characterized by various measurements. As the air and N 2 ratios were lower than 1:1, the ordered VOHPO 4 ·0.5H 2 O phase was mainly formed in the precursors during calcination. However, as the ratio of air to N 2 reached 3:1, amorphous VOPO 4 phases were formed over the surface of the precursor during calcination, which prevented the formation of ordered V5+ species over the surface of the VPO catalyst after activation. Meanwhile, a high proportion of VOHPO 4 ·0.5H 2 O in the precursor could facilitate more formation of the ordered α 1 -VOPO 4 phase over the surface of the VPO catalyst. Interestingly, the crystal structure over the surface of active VPO catalysts was totally different from the core of VPO catalysts. There were more P species and V species with 5+ existing over the surface of the VPO catalysts. The evaluation results of n-butane oxidation showed that when the ratio of air to N 2 was 1:3, the corresponding VPO-1A catalyst presented the highest conversion of n-butane and yield of the MA product (57.6 m% at 412 °C). The reason should be related to the fact that the VPO-1A catalyst possessed the highest acidity and proportions of surface V5+ species and Sur-O species. As the ratio of air to N 2 reached 3:1, the VPO-3A catalyst showed the poorest performance in the oxidation of n-butane, which could be due to the formation of inactive and amorphous VOPO 4 phases over the surface of the VPO catalyst. Finally, kinetic and thermodynamic models were established and calculated to investigate the characteristics of n-butane oxidation reactions for various VPO catalysts.
研究领域:
催化化学
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材料科学
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产品关联
DOI
高影响因子
ANALYTICA CHIMICA ACTA
·
2025
·
IF 6
Xiaoyu Li,Xiran Yang,Xinkun Chen,Changxia Liu,Linlin Wu,Dazhuo Qiu,Xueye Chen,Xuetao Shi
Background Calcium phosphate is recognized as the primary inorganic mineral component found in rigid biological tissues; its deposition within living organisms is regulated by organic matrices such as collagen and amino acids. Previous research has mainly relied on trial-and-error methods, which are often time-consuming and resource-intensive. To address this, there now exists a pressing need for more efficient approaches, to systematically explore the contributions of various organic molecules such as amino acids and collagen governing the mechanisms of calcium phosphate synthesization and mineralization. Results We designed an MA-Film platform with on-film high-throughput synthesis and screening functions. By establishing a concentration gradient of the pertinent reagent inside the platform, a series of desired products could be rapidly synthesized on the selected film. We utilized the platform to perform the biomimetic synthesis of calcium phosphates on type I collagen films. The collagen film was deposited onto the platform's silicon chip through spin-coating while concentration gradients of aspartic acid (Asp), glycine (Gly), and lysine (Lys) were generated to observe the influence of amino acids on the formation of calcium phosphate. The results indicated that the presence of carboxyl and carbonyl groups within collagen molecules would create potential nucleation sites for crystal formation, and the morphology and crystal structure of the calcium phosphates were strongly influenced by the properties and concentrations of amino acids. Significance The designed MA-Film platform provides a highly efficient, rapid, and user-friendly approach for biomimetic mineralization research by conducting 36 synthetic experiments in parallel on specific thin films through the construction of target reagent concentration gradients. And as a general-purpose tool, the platform is expected to facilitate high-throughput screening and synthesis studies across diverse materials.
研究领域:
材料科学
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生物化学
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生物矿化
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纳米技术
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高通量筛选
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
IF 9.136
Yaqi Zhang,Linli Tan,Na Han,Shiwei Tian,Wei Li,Wei Wang,Yutong Wu,Zhongshun Sun,Xingxiang Zhang
The separation of oil-in-water and water-in-oil emulsions with high efficiency and environmental friendly remains a challenge in the past decade. This work describes a new method to improve the trade-off of the poly(acrylonitrile- co -methyl acrylate) (P(AN-MA))-based membrane for water/oil separation. P(AN-MA) microfiltration (MF) membrane was fabricated via thermally induced phase separation (TIPS) method in this study. Then, some of the –CN groups and –COOCH 3 groups were converted to –COOH groups via hydrolyzing. Finally, the selected wettability was attained by grafting PEI on one side while ZIF-8 was anchored to the other side via self-assembly and in-situ interfacial reaction methods. The ZIF-8/P(AN-MA) hybrid MF membranes are superoleophobic underwater on the PEI side while super-hydrophobic under oil on the ZIF-8 side, which can efficiently and accurately separate oil-in-water and water-in-oil emulsions at a low pressure (0.01 MPa). The separation fluxes of the PEI side were as high as 3053 L/m 2 h and 1035 L/m 2 h respectively, for the surfactant-free mixtures and surfactant-stabilized emulsions. For water-in-oil emulsions, the fluxes were up to 2316 L/m 2 and 878 L/m 2 h on the ZIF-8 side, respectively. The separation efficiency of all the mixtures and emulsions was higher than 97.5 %. Moreover, the Janus membranes showed excellent anti-oil-fouling and anti-water-fouling properties on the two sides of the membranes, as well as remarkable durability during the 10 cycles in oil/water separation. Hence, Janus ZIF-8/P(AN-MA) hybrid MF membranes show potential application prospects in oil/water separation.
研究领域:
材料科学
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环境工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ONCOLOGY REPORTS
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2015
·Vol. 34
·期 6
·3147-3155
·
IF 2.301
Lili Zhang,Jie Zhang,Li Chen,Jianli Wang
Autophagy is an intracellular multi-step catabolic degradation process that involves the degradation and recycling of cellular proteins and cytoplasmic damaged organelles to maintain cellular homeostasis and reduction of metabolic stress. Numerous studies have indicated the importance of autophagy in cancer, but the role of autophagy in human skin squamous cell carcinoma (SSCC) development and response to therapy it is still unclear. In the present study, we investigated the role of autophagy in SSCC and the relationship with chemotherapy sensitivity. The present study demonstrated that autophagy related gene the microtubule-associated protein 1 light chain 3 (LC3) expression was low in SSCC. The negative correlation with Bcl2 and survivin, and the chemotherapy drug 5-FU increased the level of autophagy and the autophagy inhibitor 3-MA inhibited this effect in SSCC cells, time- and dose-dependently. When SSCC cells were treated first with 3-MA and then with 5-FU, the inhibition of proliferation, migration, invasion and apoptosis of SSCC cells was enhanced. Our results suggested the possibility of autophagy as a potential target in SSCC therapy and 3-MA and 5-FU combination treatment may be an effective SSCC therapy via autophagy modulating.
研究领域:
肿瘤学
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细胞生物学
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药理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Daqin Chen,Junni Li,Xiao Chen,Jiangkun Chen,Jiasong Zhong
Currently, metal halide perovskite nanocrystals have been extensively explored due to their unique optoelectronic properties and wide application prospects. In the present work, a facile grinding method is developed to prepare whole-family APbX3 (A = MA, FA, and Cs; X = Cl, Br, and I) perovskite nanocrystals. This strategy alleviates the harsh synthesis conditions of precursor dissolution, atmosphere protection, and high temperature. Impressively, the as-prepared perovskite nanocrystals are evidenced to have halogen-rich surfaces and yield visible full-spectral emissions with maximal photoluminescence quantum yield up to 92% and excellent stability. Additionally, the grinding method can be extended to synthesize widely concerned Mn2+-doped CsPbCl3 nanocrystals with dual-modal emissions of both excitons and dopants. As a proof-of-concept experiment, the present perovskite nanocrystals are demonstrated to be applicable as blue/green/red color converters in UV-excitable white-light-emitting diodes.
研究领域:
材料科学
·
纳米技术
·
光电
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 28
·9858-9870
·
IF 4.39
Jianjun Zhao,Yong Xu,Jun Chen,Lihong Tao,Caixia Ou,Weixia Lv,Shengwen Zhong
A porous MA–VA–PcNi polymer was prepared by grafting nickel phthalocyanine (PcNi) onto the main chain of a maleic anhydride–vinyl acetate (MA–VA) polymer, and an MA–VA–PcNi electrode is prepared by electrospinning technology to inhibit the agglomeration of the active powder effectively, which produces spherical particles with a diameter of 100–300 nm. The synthesized MA–VA–PcNi polymer is used as the anode for lithium-ion and sodium-ion batteries, exhibiting excellent energy storage behaviors. The MA–VA–PcNi/Li battery displays a high capacity of 610 mA h g−1 and can still remain at 507 mA h g−1 with a retention rate of 83.1% after 400 cycles at a current density of 200 mA g−1. Even at a high current density of 2 A g−1, the specific capacity can remain at 195 mA h g−1. In addition, the MA–VA–PcNi/Na battery displays a high capacity of 336 mA h g−1 and can still remain at 278 mA h g−1 with a retention rate of 82.7% after 400 cycles at a current density of 100 mA g−1. A high specific capacity of 164 mA h g−1 can also be achieved at a high current density of 1 A g−1. After nickel phthalocyanine (PcNi) was grafted onto the MA–VA polymer, aggregation between phthalocyanine rings was effectively prevented, and this exposes more active sites. At the same time, the spherical particles obtained by electrospinning technology further improve the dispersion and increase the number of active sites of the active materials. Finally, the electrode materials show excellent energy storage behavior for lithium-ion and sodium-ion batteries, which provides a new idea for designing high-performance energy storage materials for organic electrodes.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Shuaiyan Ji,Wei Li,Ningning Lv,Xiaoting Chen
The superhydrophilic/underwater superhydrophobic membrane offers unique advantages in effectively separating oily wastewater. However, the development of membrane materials that can efficiently separate emulsions only under gravity is still a challenge. A crosslinked network copolymer P(MA-AMPS) was synthesized by radical polymerization of N, n-methylenebisacrylamide (MBA), methacrylamide (MA) and 2-acrylamide-2-methylpropanesulfonic acid (AMPS) initiated by potassium persulfate. Then polyvinyl alcohol (PVA) and nano-SiO 2 were inserted to the crosslinked polymer system in order to prepare a P(MA-AMPS)/PVA@SiO 2 hybrid hydrogel. The hybrid hydrogel can be sprayed on the surface of stainless steel mesh (SSM) by a simple spraying method, so as to achieve superhydrophilicity/underwater superoleophobicity. The oil-water emulsion permeation flux reached more than 352.94 L·m −2 ·h −1 , while xhibiting a more than 99.5 % separation efficiency under gravity. The anti-fouling tests demonstrated that the membrane exhibited outstanding anti-fouling performance. Moreover, the combination of stable semi-interpenetrating networks and nanoparticles made the membrane exhibit excellent stability and durable separation ability in complex physicochemical environments.
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）