JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY
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2021
·
IF 2.077
Ling Zhang,Xinyang Jin,Yuedan Xu,Chaoyang Wang,Mingxing Li,Baiping Fu
This study investigated effects of polyacrylic acid (PAA) on nanolayering self-assembly, and effects of salt ions on the formation of nanolayering after their chemical interaction with 10-methacryloyloxydecyl dihydrogen phosphate (MDP). ACP–MDP suspension was prepared by dispersing 0.01 g ACP nanoparticles in 4 mL of a 5 wt% MDP solution. Then a PAA solution (100 or 500 μg/mL) was mixed into ACP–MDP suspension. The reaction products were analyzed by transmission electron microscope (TEM). After one of the following metal chlorides (each 0.076 mM of CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2, CuCl2, ZnCl2, or MgCl2) was dispersed in a 4 mL MDP solution, they were further analyzed by X-ray diffraction (XRD) and TEM. ACP nanoparticles in the MDP solution could self-assemble into ACP–MDP nanolayering composites. The TEM images show that an amount of ACP nanoparticles were aggregated and fused together after the addition of PAA into ACP–MDP suspensions, while no nanolayering was found. The XRD data and TEM images reveal that nanolayering was self-assembled after the chemical interaction of MDP with some metal chlorides (CaCl2, BaCl2, AlCl3, FeCl2, FeCl3, MnCl2), but not with the others (ZnCl2, CuCl2, MgCl2). PAA could inhibit the self-assembly of nanolayering. Some salt ions play an important role in highly ordered, self-assembled nanostructure after their chemical interaction with MDP. The finding is helpful for functional materials fabrication.
研究领域:
材料科学
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生物医学工程
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2019
·Vol. 65
·期 8
·e16625
·
IF 3.463
Zhen Song,Xutao Hu,Yageng Zhou,Teng Zhou,Zhiwen Qi,Kai Sundmacher
Although double salt ionic liquids (DSILs) offer significant advantages over classical two-ion ionic liquids as separation solvents, relevant studies are still scarce and a systematic DSIL selection method is thus highly desirable. In this contribution, a rational method for designing DSILs as extraction solvents is proposed and exemplified by the thiophene/ n -octane separation. The effects of additional degrees of freedom for DSIL design (i.e., double cations and/or anions and the ion ratio) on the thermodynamic properties are first analyzed by COSMO-RS. Then, a multilevel DSIL design method combining the prediction of infinite dilution thermodynamic properties, the estimation of physical properties, the evaluation of phase equilibrium behavior, and the experimental validation is proposed. By applying this method, [C 2 MIm][OAc] x [NO 3 ] 1- x ( x = [0, 1]) and [C 2 MIm][OAc] x [SCN] 1- x ( x = [0.70, 1]) are identified as promising DSIL solvents for the thiophene/ n -octane separation. Correspondingly, the liquid–liquid equilibria of {DSILs + thiophene + n -octane} with the designed DSILs are experimentally studied.
研究领域:
化学工程
·
分离科学
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产品关联
DOI
高影响因子
Chemical & Biomedical Imaging
·
2023
·
IF 0
Yan Zhang,Ning Xu,Chunyu Yan,Xuelian Zhou,Qinglong Qiao,Lu Miao,Zhaochao Xu
The aggregation of fusion in sarcoma (FUS) in the cytoplasm and nucleus is a pathological feature of Amyotrophic lateral sclerosis (ALS) and Frontotemporal Dementia (FTD). Genetic mutations, abnormal protein synthesis, environmental stress, and aging have all been implicated as causative factors in this process. Salt ions are essential to many physiological processes in the body, and the imbalance of them is an important environmental stress factor in cells. However, their effect on liquid–liquid phase separation (LLPS) of FUS proteins in living cells is not well understood. Here, we map the various salt-induced LLPS of FUS in living cells by genetically coding and self-labeling FUS with organic dyes. The brightness and photostability of the dyes enable long-term imaging to track the mechanism of the assembly and disappearance of FUS phase separation. The FUS protein showed a better phase separation tendency under 0.3 M salt stimulation, and there was a large amount of FUS shuttling from the nucleus to the cytoplasm. At this concentration, various salt solutions displayed different effects on the phase separation of FUS protein, following the Hofmeister effects. We further observed that the assembly of FUS droplets underwent a process of rapid formation of small droplets, plateaus, and mutual fusion. Strikingly, The CsCl-stimulated FUS droplets were not completely reversible after washing, and some solid-like granules remained in the nucleus. Taken together, these results help broaden our understanding of the LLPS of FUS proteins in cellular stress responses.
研究领域:
神经退行性疾病
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细胞生物学
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生物化学
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分子生物学
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DOI
JOURNAL OF HAZARDOUS MATERIALS
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2022
·
IF 14.224
Si Liu,JinHui Huang,Wei Zhang,LiXiu Shi,KaiXin Yi,ChenYu Zhang,HaoLiang Pang,JiaoNi Li,SuZhou Li
In this study, the adsorption behavior of Pb(II) on natural-aged and virgin microplastics in different electrolyte solutions was investigated. The results demonstrated that natural-aged microplastics exhibited higher adsorption capacity for Pb(II) compared to virgin ones, and the addition of CaCl 2 strongly inhibited the adsorption amount of Pb(II). The adsorption kinetics of Pb(II) adsorption were better fitted by the pseudo-second order model and Elovich equation, and were slowed down greatly at higher ionic strength. The rate-limiting steps of adsorption process were dominated by intra-particle diffusion. The adsorption isotherm of Pb(II) onto microplastics affected by salt ions can be well described by Freundlich model, the greater adsorption efficiency of natural-aged microplastics proved that adsorption process was multilayer and heterogeneous. In addition, pH significantly influenced the adsorption of Pb(II) due to the changes electrostatic interactions. The effect of fulvic acid in the electrolyte solutions was also revealed and attributed to the complexation with Na + and Ca 2+ . Furthermore, the higher pH and ionic strength in different environmental water dramatically decreased adsorption capacity onto microplastics. Finally, it’s confirmed that the adsorption mechanisms affected by salt ions mainly involve electrostatic interaction, surface complexation, and ionic exchange. These findings indicate that salt ions exert an important influence on the adsorption of heavy metals for MPs, which should be further concerned.
研究领域:
环境科学
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生态学
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2017
·Vol. 41
·期 19
·10598-10606
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IF 3.269
Chong Chen,Fengmao Liu,Tengfei Fan,Qizhen Zhou,Qingrong Peng
In this work, quaternary ammonium based ionic liquids (ILs) are proven to be good candidates to act as green solvents/solubilizers for pesticide formulations. The surface activity of six ionic liquids ([M3CnN]X; M = CH3; n = 10, 12, 14; X = Cl, Br) was tested, along with the corresponding critical aggregation concentration (CAC), lowest surface tension (γCAC), maximum surface excess concentration (Γmax), minimum area per molecule (Amin) and higher adsorption efficiency (pC20), which were measured using several methods, including surface tension measurements, electrical conductivity measurements, steady-state fluorescence measurements and 1H NMR. The thermodynamic parameters of micellization, the viscosities and the activation energies of the six ILs in 30% aqueous solutions, over the temperature range of 288–308 K, were determined and calculated. The results indicated that the solubilities of representative pesticides (metolachlor, acetochlor, clethodim, thiamethoxam, prochloraz, acetamiprid and fosthiazate) in different concentrations of these ILs were significantly higher than in pure water, especially for prochloraz (e.g., 137.2 g L−1 in 30% C10Br, 4035 times higher than in pure water). The microenvironment existing between the pesticide and micelle was investigated using 1H NMR techniques, revealing that micelle localization of pesticide molecules and a change in micelle conformation occurred in the dissolving process.
研究领域:
化学
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环境科学
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产品关联
DOI
高影响因子
Analytical Methods
·
2017
·Vol. 9
·期 38
·5668-5673
·
IF 1.9
Dan-Ling Zhou,Hong Huang,Yan Wang
In this work, we demonstrated a facile green method for the preparation of fluorescent copper nanoclusters (Cu NCs) with a high quantum yield of 8.6%, using glutathione as the stabilizing agent and ascorbic acid as the reductant. The as-prepared Cu NCs had good water solubility and ultrafine sizes. Further investigation revealed that the fluorescence of Cu NCs was linearly quenched by nitrite ions over the concentration range of 10–225 μM, with the detection limit of 3.4 μM. The proposed method has been successfully applied to determine nitrite ions in real water samples.
研究领域:
分析化学
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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
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Shengxin Chen,Ran An,Yingwei Li,Yuting Zhu,Xinbao Zhu,Ruixia Liu,Xingang Li,Suojiang Zhang
In recent years, multi-ionic liquids (ILs) mixture systems have been widely noticed and applied in catalysis due to their unique properties. In order to establish the quantitative relationship between parameters and catalytic behavior, double salt ILs (DSILs), with different cation (1-ethyl-3-methylimidazolium, choline, tetraethylammonium) but same anion (acetate), are performed in the coupling reaction of propylene oxide (PO) with methanol. In the present work, the DSILs properties like Hammett basicity (H0), hydrogen bond donor (HBD) ability (α), hydrogen bond acceptor (HBA) ability (β) and dipolarity/polarizability effect (π*) were considered in the reaction. These control factors were quantitative related to catalytic performance by a modified liner solvent energy relationship (LSER) function that adding a Hammett function correction term. According to the modified-LSER, solvents with different parameters were tested to verify its validity and control the reaction. This study demonstrated each parameter could make a different contribution to chemical reaction. It provides a new perspective way for multi-ILs mixture avoiding the intricacies of the parameter relation in ILs catalysis reasonably.
研究领域:
化学工程
·
催化科学
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产品关联
DOI
高影响因子
Lubrication Science
·
2022
·Vol. 34
·期 6
·428-439
·
IF 1.307
Feiming Wang,Xing Gao,Shuliang Zang,Guichun Deng,Shuang Yue
Two borate ionic liquids 1-Butyl-3-(2-methoxy-2-oxoethyl)-imidazole bis(mandelato)-borate [MABIM][BMB]) and 1,3-Dioctylbenzotriazole bis(mandelato)-borate ([DOBI][BMB]) were synthesised and utilised as the lubricating additives. Their corrosion degrees were measured and the results show that [DOBI][BMB] and [MABIM][BMB] exhibit remarkable anti-corrosion properties ([DOBI][BMB]: 1a, [MABIM][BMB]: 1b). The 4-ball machine was employed to evaluate their tribological properties in 500 N base oil. When [DOBI][BMB] and [MABIM][BMB] were added at the concentration of 3.0 wt%, the friction coefficient of 500 N was reduced by 37.5% and 29.5%. It can be concluded from the results of XPS and SEM that a lubricating film containing iron oxide, B 2 O 3 and organic N-containing compounds have formed. And a model is proposed so as to describe the lubricating mechanism.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2024
·
IF 6
Chaozhi Zhu,Yadong Tian,Huan Liu,Gaiming Zhao,Yangyang Ma,Xueyuan Bai,Ke Wang
Health concerns have increased the demand for low-salt emulsified meat products emulsions; however, salt-soluble myofibrillar proteins (MP) are less than optimal emulsifiers under low-salt conditions. In this study, four different cations (Na + , K + , Ca 2+ , and Mg 2+ ) were added to a Pickering emulsion and high-intensity ultrasound (HIU, 20 kHz, 600 W) was used to determine the quality of the final emulsion. The divalent cation group was found to significantly (P < 0.05) improve the emulsification performance of the emulsion; in particular, the emulsion activity index and emulsion stability index of Mg 2+ -H group increased to 16.24 ± 1.22 m 2 /g and 89.66 ± 3.01%, respectively. Measurements of the particle size and zeta potential confirmed that the emulsion particle size of the Mg 2+ -H group decreased, and the electrostatic repulsion force increased. Based on the surface hydrophobicity and endogenous tryptophan spectra, the particle structure of the MP microgel was determined to be a more stable emulsifier. What's more, the divalent cations promoted the droplets to become evenly dispersed under high-intensity ultrasound. The micrograph confirmed this result: the divalent cation group emulsion was more uniform and stable than the monovalent cation group emulsion. Divalent cations are more suitable than monovalent cations for improving the quality of reduced-salt Pickering emulsions.
研究领域:
食品科学
·
生物化学
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产品关联
DOI
高影响因子
ELECTROCHEMISTRY
·
2022
·Vol. 90
·期 10
·107004-107004
·
IF 1.777
Gong CHEN,Dingwei MIN,Yipeng HUANG
As a way to explore methods to capture and transform CO2 into useful carbon materials, the electrochemical mechanism of carbonate ion reduction in molten Li2CO3–K2CO3 eutectic mixtures is studied by cyclic voltammetry, chronopotentiometry, and chronocoulometry. Evidence indicates CO32− to undergo reduction to produce solid carbon before the alkali metal ions Li+ and K+. The electrode reactions consist of a diffusion-controlled, totally irreversible process comprising a one-step electron transfer. Notably, the described electrochemical process produces carbon sheets, submicron carbon tubes, or submicron carbon particles, depending on the applied cathodic overpotential. When O2− ions are released as part of the electrochemical reduction of CO32−, some of these ions immediately combine with Li+ to form insoluble Li2O, which are disadvantageous processes from the standpoint of CO2 capture in the cathodic region. Results suggest thus that a type of molten salt electrolyte in which alkali metal oxides are highly soluble should be employed for effective molten salt CO2 capture and electrochemical transformation.
研究领域:
材料科学
·
电化学工程
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Chao Huang,Miao Sun,Ying Wang,Lixian Shi,Xuan Liu,Nantao Hu
Separation membranes based on graphene oxide (GO) have attracted much attention due to their good separation properties. But its instability in water and rejection of divalent salt ions is a problem that needs to be solved urgently. In this study, molybdenum disulfide (MoS 2 ) is intercalated into graphene oxide by adding polyethyleneimine (PEI) solution drop by drop for cross-linking, and then GO/MoS 2 /PEI composite membrane is prepared by vacuum filtration. As MoS 2 hydrophobicity increases frictionless water flow channels to improve water flux, PEI cross-linking improves membrane stability and rejection of divalent salt ions. The modified composite membrane has a high rejection of 94.8 % for Mg 2+ , and water flux is increased by 30 % relative to GO/PEI membrane. In addition, the rejection of the composite membrane to different salt solutions is investigated by MgCl 2 , MgSO 4 , NaCl and Na 2 SO 4 solutions, and the results obtained are, in order, R(MgCl 2 ) > R(MgSO 4 ) > R(NaCl) > R(Na 2 SO 4 ). This modified composite membrane has great potential for salt ion removal.
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
CHINESE JOURNAL OF CATALYSIS
·
2017
·
IF 2.813
Wei Sun,Fei Xu,Weiguo Cheng,Jian Sun,Guoqing Ning,Suojiang Zhang
A series of quaternary ammonium ionic liquids (ILs) were synthesized and employed as catalysts for the production of poly(isosorbide carbonate) (PIC) from diphenyl carbonate and isosorbide via a melt polycondensation process. The relationship between the anions of the ILs and the catalytic activities was investigated, and the readily-prepared IL tetraethylammonium imidazolate (TEAI) was found to exhibit the highest catalytic activity. After optimizing the reaction conditions, a PIC with a weight-average molecular weight ( M w ) of 25600 g/mol was obtained, in conjunction with an isosorbide conversion of 92%. As a means of modifying the molecular flexibility and thermal properties of the PIC, poly(aliphatic diol-co-isosorbide carbonate)s (PAIC)s were successfully synthesized, again using TEAI, and polymers with M w values ranging from 29000 to 112000 g/mol were obtained. 13 C NMR analyses determined that the PAIC specimens had random microstructures, while differential scanning calorimetry demonstrated that each of the PAICs were amorphous and had glass transition temperatures ranging from 50 to 115 °C. Thermogravimetric analyses found T d-5% values ranging from 316 to 332 °C for these polymers. Based on these data, it is evident that the incorporation of linear or cyclohexane-based diol repeating units changed the thermal properties of the PIC.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）