JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Xiaomin Qiu,Bingjie Huo,Qi Wang,Jingwei Yang,Zhaoyou Zhu,Yinglong Wang,Jun Gao
In this work, the effects of N-methyl pyrrolidone, N,N-dimethylformamide, cyclohexanol, butyl butyrate, and N-formylmorpholine on the separation efficiency of a p-xylene and 1-pentanol azeotropic system are investigated, and the best solvent is selected from these solvents. The vapor–liquid equilibrium data of binary systems of 1-pentanol + butyl butyrate, 1-pentanol + N-formylmorpholine, and p-xylene + butyl butyrate are measured using a modified Rose-type circulating still under 101.3 kPa. In order to check the thermodynamic consistency of the experimental vapor–liquid equilibrium data, the Herington and Van Ness methods are used. In addition, the nonrandom two-liquid, universal quasichemical, and Wilson models are used to correlate the experimental data of binary systems, and the interaction parameters of binary systems are obtained.
研究领域:
化学工程
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热力学
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DOI
高影响因子
Royal Society Open Science
·
2019
·Vol. 6
·期 8
·
IF 2.515
Ran Liu,Ke Zhang,Chen Liu,Yanhui Hu,Lilong Zhou,Juan Zhang
Four kinds of functional ionic liquids (ILs) ([C3SO3Hnmp]HSO4), 1-(3-sulfopropyl)-1-methylpyrrolidone phosphate ([C3SO3Hnmp]H2PO4), 1-(3-sulfopropyl)-1-methylpyrrolidone p-toluene sulfonate ([C3SO3Hnmp]CH3SO3H) and 1-(3-sulfopropyl)-1-methylpyrrolidone methyl sulfonate ([C3SO3Hnmp]C6H6SO3H)) were prepared and the catalytic activity of these ILs during esterification of carboxylic acids (formic acid, acetic acid, propionic acid, butyric acid) with alcohols was investigated. The results indicated that the IL ([C3SO3Hnmp]HSO4) exhibited an optimal catalytic performance. And then the IL ([C3SO3Hnmp]HSO4) was immobilized to the silica gel. The immobilized IL performed more excellent catalytic activity than the unsupported [C3SO3Hnmp]HSO4. The effects of reaction temperature, reaction time, molar ratio of acid to alcohol and catalyst dosage were investigated. The response surface methodology based on the Box–Behnken design (BBD) was used to explore the best reaction condition of different experimental variables. Accordingly, a high n-butyl butyrate yield of 97.10% under the deduced optimal reaction conditions was obtained, in good agreement with experimental results and that predicted by the BBD model. The immobilized IL [C3SO3Hnmp]HSO4 maintained high catalytic activity after five cycles.
研究领域:
化学工程
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催化化学
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DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2024
·
IF 5.3
Yujie Zhen,Qingqing Yin,Fangyu Zhang,Anle Zhang,Wenxue Lu,Tao Li,Yiwu Lu,Yingmin Yu
To explore the effective treatment of acrylic acid wastewater, liquid–liquid equilibrium (LLE) data for water + acrylic acid + {n-propyl acetate, n-butyl acetate, n-heptanol, and methyl isopropyl ketone} at 303.2 K and 101.3 kPa were measured respectively. The distribution coefficients ( D ) and separation factors ( S ) were used to assess the extraction effectiveness of the four solvents, and the results of the comparative data showed that the D values of the four solvents for acrylic acid ranged from 1.6 to 4.4, and the S values were in the order of n-butyl acetate > n-propyl acetate > MIPK > n-heptanol. The experimental data were fitted by NRTL and UNIQUAC models to obtain the binary interaction parameters, and the obtained above parameters were proved reliable by the mixing surface analysis method of Gibbs energy topology. The root mean square deviation ( RMSD ) of both models did not exceed 0.0051 and 0.0077, respectively. In addition, σ-profiles analyzed the differences in extraction effects in terms of interactions and interaction energies, and the analyses showed that the theoretical calculations are in agreement with the experimental results.
研究领域:
化学工程
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物理化学
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环境科学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Chong Yang,Shimin Xu,Yuyao Xie,Pai Lu,Hui Wang,Lihua Cheng
In this study, a comprehensive investigation was conducted to gather fundamental data for the solvent extraction and separation of n-octane and butyl acetate. Various extractants, including furfural, dimethyl sulfoxide, N,N-dimethylformamide, N-formylmorpholine, ethylene glycol, and N-methylpyrrolidone, were employed to examine the extraction and separation of their mixtures. Measurements were conducted at constant pressure and temperature of 101.3 kPa and 298.2 K, respectively. The distribution constant, separation factor, and performance index were calculated from the obtained liquid–liquid equilibrium data, offering a quantitative assessment of the effectiveness of the extractants in extracting and separating n-octane and butyl acetate. The consistency of the LLE data was validated by using the Hand and Othmer–Tobias equations. Furthermore, the experimental data were successfully correlated using the NRTL and UNIQUAC thermodynamic models. The root-mean-square deviation was used to assess the difference between the calculated results and the experimental data. In addition, the obtained binary interaction parameters were validated using GMcal_TieLinesLL software developed by Marcilla and his collaborators. Our results demonstrate the accuracy and reliability of the experimental data and correlative models, offering valuable insights that will facilitate the future development of solvent extraction separation processes involving n-octane and butyl acetate.
研究领域:
化学工程
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热力学
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溶剂萃取
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过程开发
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DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2021
·Vol. 50
·期 4
·544-557
·
IF 1.677
Dong Shihua,Jia Bing,Chen Xiubin,Jiang Xiaobo
For separation of the azeotropes of water + 2-methyl-3-buten-2-ol by liquid–liquid extraction, methyl tert-butyl ether or butyl acetate or 4-methyl-2-pentanone or 2-ethyl-1-hexanol was selected as the extraction solvent. The liquid–liquid equilibrium (LLE) data for water + 2-methyl-3-buten-2-ol + (methyl tert-butyl ether/butyl acetate/4-methyl-2-pentanone/2-ethyl-1-hexanol) ternary systems at 308.2 K under 101.3 kPa were determined. The distribution coefficient and the separation factor were calculated to evaluate the extraction ability of different solvents. The Othmer–Tobias, Bachman, and Hand equations were applied to verify the reliability of the experimental LLE data. Meanwhile, the experimental LLE data were successfully correlated by the NRTL and UNIQUAC models with the root-mean-square deviations (RMSD) were less than 0.42%.
研究领域:
化学工程
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热力学
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物理化学
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 36
·2260
·
IF 2.8
Dong Hongyu,Liang Zhenhui,Xu Qinchao,Zhao Liangfu
A binary micro-nano graded silver-based low temperature conductive composite paste was developed for printing conductive patterns on flexible substrates.The conductive phase includesmulti-scale flake and spherical silver powders, with bisphenol F epoxy resin as the binder. Butyl butyrate, 2-(2-butoxyethoxy) ethanol, and diethylene glycol monobutyl ether acetate were selected as organic solvents. Using DSC, TG, surface morphology, viscosity, and resistivity analyses, we investigated the effects of these solvents with different boiling points on the conductivity and curing behavior of the low temperature paste. After screen-printed onto polyimide film, the paste demonstrated low resistivity (3×10 –5 Ωˑcm) and robust mechanical stability.Its resistance increased from 1.4 Ω to only 1.5 Ω after 3000 bending cycles. The adhesion strength of the printed pattern was assessed via a tape test.The pasteshowedgood comprehensive performance, when applied in thin-film switches and light-emitting logo devices. These results highlight its potential for flexible electronicsapplications and provide valuable insights for advancing flexible conductive circuits.
研究领域:
材料科学
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电子材料
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柔性电子
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导电复合材料
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印刷电子
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产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Huiqiang Qi,Yuan Liu,Shiyi Hao,Xijie Liu,Yuan Gao,Mingyu Zhang,Yonglong Zheng,Jiutian Wang,Jianfei Wu
The practical implementation of high-rate charging all-solid-state batteries (ASSBs) is severely hindered by sluggish Li-ion transport and persistent solid–solid interface degradation. In this work, we design a lithiophilic quaternary Li-Al-Si-Zn (ASZ@Li) alloy anode with a multiphase electron–ion co-conductive network (EICN) to overcome these critical limitations. When assembled with a LiNi0.9Co0.05Mn0.05O2 (Ni90) cathode, the resultant full cell achieves ultra-rapid charge–discharge within 72 s at 50 C, yielding a specific capacity of 105.6 mAh g–1 (57.9% of its 1 C capacity). Notably, the cell delivers outstanding cycling durability: it retains 80% of its initial capacity after 2,050 cycles at 20 C and 80% of its initial capacity even after 1460 cycles at 50 C. Even under a high areal loading of 30 mg cm–2 (6.73 mAh cm–2), the cell maintains 86% of its initial capacity after 520 cycles at 2 C, a critical metric for practical high-energy-density battery systems. Systematic experiments combined with first-principles calculations reveal the distinct roles of each phase in the ASZ@Li anode. LiAl domains ensure robust electronic percolation, LiZn phases promote uniform Li deposition and fast Li-ion transport, and Si-rich regions alleviate mechanical strain during cycling. This multiphase synergistic effect efficiently reduces interfacial impedance, enhances Li-ion diffusion kinetics, and stabilizes the electrode/electrolyte interface, paving the way for a robust, scalable anode design paradigm for high-rate ASSBs.
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DOI
高影响因子
Food Chemistry-X
·
2025
·
IF 8.2
Xiaoying Li,Gang Li,Haijing Wang,Chunsheng Liu,Chunrui Rong,Fuhang Song,Caixia Chen,Junkai Wu
The changes in volatiles during postharvest storage of three peach cultivars (JC, ZYP9 and ZY8) were tracked under two temperature conditions (25 °C and 4 °C). Overall volatile content significantly decreased during storage over time, specifically with a marked decrease in ester levels, while the relative proportions of alcohols, aldehydes, and ketones increased during cold storage. These changes in volatile composition revealed three distinct storage stages across the cultivars, with the middle stage marking a critical turning point in volatile flavor quality. Among the cultivars, ZYP9 and ZY8 exhibited better adaptability to cold storage than JC. The reduction in key esters, coupled with the increase in alcohols and aldehydes, led to altered aroma profiles and the development of off-flavors in cold-stored peaches. Overall, this study provides valuable insights into the dynamic changes in flavor volatiles during postharvest storage and contribute to a deeper understanding of aroma quality in stored peaches.
研究领域:
食品科学
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植物生理学
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产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Le Zhong,Yuxiao Feng,Zichen Wang,Tian Tian,Yali Bi,Jiandong Cui
Enzymatic synthesis of flavor esters is crucial for applications in food, beverage, and cosmetics industries. However, the poor activity and stability of free lipase hinder these reaction. Inspired by the concept of lipase interface activation, MIL-53(Al)-NH 2 was modified with alkyl acid anhydrides of varying chain lengths to tailor its hydrophobicity, and Candida Rugosa lipase (CRL) was subsequently immobilized on this surface to achieve efficient interface activation. The resulting CRL@MIL-53(Al)-AM11 exhibited 3.5 times higher activity than the unmodified CRL@MIL-53(Al)-NH 2 . Moreover, CRL@MIL-53(Al)-AM11 enabled one-step purification of crude CRL via selective adsorption. It also showed enhanced storage and thermal stability as well as higher resistance to protease degradation and denaturants than free CRL. CRL@MIL-53(Al)-AM11 retained 75 % of its initial activity after 30 min treatment at 55 °C, whereas the free CRL retained only 41 %. After 11 days of storage, CRL@MIL-53(Al)-AM11 maintained 70 % of its initial activity, in contrast to 36 % for the free lipase. Notably, CRL@MIL-53(Al)-AM11 achieved a 97 % conversion rate in the esterification synthesis of the flavoring substance (butyl butyrate) within 24 h and retained over 40 % conversion after five consecutive cycles. Therefore, this strategy offers a feasible approach for constructing high-performance immobilized lipases for flavor ester synthesis.
研究领域:
生物化学
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食品科学
·
酶工程
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DOI
PubMed
高影响因子
TALANTA
·
2021
·
IF 6.057
Zhenyu Lu,Xiaotian Lu,Ling Xia,Yanhui Zhong,Gongke Li,Yufei Hu
In this work, a catalytic material of cobalt doped nitrogenous porous carbon (Co/NPC) was fabricated from covalent organic frameworks (COFs) and cobalt ion via directly carbonization . Attribute to the excellent selective catalytic performance towards n -hexane, Co/NPC was employed in cataluminescence (CTL) for rapid and sensitive determination of n -hexane. Moreover, the detection conditions of CTL were evaluated, including temperature, flow rate and detecting wavelength. Under optimized conditions, a good linear relation between signal intensity of CTL and n -hexane concentration was obtained in the linear range of 0.4–250.0 mg/L and the limit of detection (LOD, S/N = 3) was 0.13 mg/L. Furthermore, the Co/NPC based CTL sensor was successfully applied to the determination of n -hexane in edible oil samples with the recoveries in the range of 92.0%–104.0%. The method comparison results of GC/MS and CTL on real sample analysis further proved the accuracy of the developed Co/NPC based CTL method. Additionally, the possible catalytic mechanism of n -hexane on the surface of Co/NPC was investigated, assisting by GC/MS on intermediation products identification. Overall, the Co/NPC based CTL sensor has been confirmed excellent performance in the n -hexane determination, which revealing extensive application in rapid residual n -hexane analysis in edible oil .
研究领域:
分析化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 31
·18192-18199
·
IF 3.119
Zihao Yang,Taiheng Yin,Fengfan Zhang,Wei Wu,Meiqin Lin,Zhaoxia Dong,Juan Zhang
To study the microscopic dispersion state of CO2 in different ester solvents, the solubility, volume expansion coefficients and in situ Fourier transform infrared (FTIR) spectra of the CO2–ester system were measured. The results show that the solubility and expansion coefficient of CO2 in ester solvents decreases as the hydrocarbon chain increases. As the pressure increases, the infrared absorption peaks of CO2 and the functional groups characteristic of ester molecules shift, indicating that CO2 molecules interact with ester molecules and that CO2 would destroy the interactions between the ester molecules. The hydrocarbon chain length of the ester molecules has a significant effect on the infrared absorption peak of the CO2–ester system. As the hydrocarbon chain length increases, the CO2 absorption peak shift and peak shift of the carbonyl groups in the ester gradually decrease.
研究领域:
化学工程
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物理化学
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2011
·
IF 4.269
Jun Zhou,Xiuying Qiao,Bernard P. Binks,Kang Sun,Mingwen Bai,Yunlong Li,Yi Liu
Superparamagnetic Fe3O4 nanoparticles prepared by a classical coprecipitation method were used as the stabilizer to prepare magnetic Pickering emulsions, and the effects of particle concentration, oil/water volume ratio, and oil polarity on the type, stability, composition, and morphology of these functional emulsions were investigated. The three-phase contact angle (θow) of the Fe3O4 nanoparticles at the oil−water interface was evaluated using the Washburn method, and the results showed that for nonpolar and weakly polar oils of dodecane and silicone, θow is close to 90°, whereas for strongly polar oils of butyl butyrate and 1-decanol, θow is far below 90°. Inherently hydrophilic Fe3O4 nanoparticles can be used to prepare stable dodecane−water and silicone−water emulsions, but they cannot stabilize butyl butyrate−water and decanol−water mixtures with macroscopic phase separation occurring, which is in good agreement with the contact angle data. Emulsions are of the oil-in-water type for both dodecane and silicone oil, and the average droplet size increases with an increase in the oil volume fraction. For stable emulsions, not all of the particles are adsorbed to drop interfaces; the fraction adsorbed decreases with an increase in the initial oil volume fraction. Changes in the particle concentration have no obvious influence on the stability of these emulsions, even though the droplet size decreases with concentration.
研究领域:
材料科学
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化学工程
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）