FLUID PHASE EQUILIBRIA
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2026
·
IF 2.7
Jian-an Wang,Jiahao Shi,Junyu Feng,Qingsong An,Shengshan Bi
High-pressure density data of n -alkanols are essential for the design of biodiesel blended fuels and fuel injection in marine engines. However, reliable experimental data for n -alkanols (C4–C7) under high pressures (up to 200 MPa) remain scarce. In this study, a high-pressure density measurement system based on the variable-volume method was established, achieving a combined expanded uncertainty of 0.27% ( k = 2). The densities of n -alkanols (C4–C7) were measured over the temperature range of 303.15–383.15 K and pressures up to 200 MPa. The measured data were accurately correlated using the Tammann-Tait equation, and the derived thermodynamic properties were obtained. Then, the parameters of the Perturbed-Chain Statistical Associating Fluid Theory (PC-SAFT) equation of state (EoS) for n -alkanols were optimized using the 2B association scheme. Within the experimental range, the average absolute relative deviation (AARD) between the calculated and experimental densities was <0.1%, demonstrating the applicability of the model for ultra-high-pressure volumetric calculations. This study addresses the gap in high-pressure property data for n -alkanols (C4–C7) and provides a critical experimental and modeling foundation for the development of efficient and clean marine power systems. Download: Download high-res image (351KB) Download: Download full-size image
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Foods
·
2026
·Vol. 15
·期 15
·2701
·
IF 6
Yadi Yuan,Jingming Zhou,Hongliang Liu,Haili Wang,Yanhua Qi,Enping Liu,Yongxin Li,Aiping Wang
In recent years, food safety concerns associated with veterinary drug residues have aroused significant public attention, highlighting the critical need for continuous monitoring in both animal-derived foods and the environment to safeguard public health. Medroxyprogesterone acetate (MPA), a major anabolic steroid widely used in animal husbandry, poses potential human health risks according to recent studies. Although conventional analytical techniques based on chromatography and immunological assays are effective, they often suffer from complex operations, the need for skilled personnel, high cost, and time consumption. To overcome these limitations, electrochemical immunosensors modified with advanced nanomaterials offer a promising alternative. Herein, a highly sensitive electrochemical immunosensor was developed for trace MPA detection utilizing core–shell SiO2-PEI@Ag nanoparticles as the sensing matrix. In this nanocomposite, the structural synergy between the SiO2core and outer Ag NPs shell not only provides a high-density platform for specific antibody immobilization, but also drastically expands the electroactive surface area and accelerates electron transfer to maximize signal amplification. Benefiting from these synergistic advantages, the constructed immunosensor exhibited a limit of detection (LOD) of 0.014 ng/mL and a wide linear range of 0.03–100 ng/mL. Furthermore, the recovery rates in pork and milk samples were 91.32–97.29% and 95.14–102.54%, respectively. In addition, negligible cross-reaction was observed toward structurally related steroid hormones related to MPA and common antibiotics. The immunosensor shows good stability, reproducibility, and accuracy, demonstrating great potential as a promising candidate to complement conventional tools for future MPA residue screening.
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yangmin Wu,Wenjie Zhao,Sheng Liu,Liping Wang
Cellulose nanofiber was grafted on Ti 3 C 2 T x (Ti 3 C 2 T x @CNF) and then Ti 3 C 2 Tx@CNF nanohybrid acted as nanofiller to endow epoxy coating superior barrier property. Electrochemical tests and corrosion products revealed that incorporation of Ti 3 C 2 T x @CNF into epoxy could significantly improve its anti-corrosion performance. Even immersion in marine alternating hydrostatic pressure (AHP) environment for 240 h, the impedance modulus of composite coating was one order of magnitude higher as compared with controlled samples. Besides, cross-sectional structure confirmed that Ti 3 C 2 T x @CNF remarkable improve the compactness of coating and thus conferring active adhesion strength with twice higher than that of pure epoxy after 240 h immersion in AHP.
研究领域:
材料科学
·
腐蚀工程
·
纳米技术
·
涂料与薄膜
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高影响因子
FUEL
·
2015
·
IF 3.52
Xiangyang Liu,Maogang He,Chao Su,Xuetao Qi,Nan Lv
In this work, the isobaric molar heat capacities of methyl caprate and methyl laurate were measured within the temperatures from 300 K to 380 K and at pressures from 0.1 MPa to 4.25 MPa. The measurements were carried out using a flow calorimeter. The results obtained show that the isobaric molar heat capacities of methyl caprate are lower than those of methyl laurate while the isobaric molar heat capacities of these two fatty acid methyl esters rise with the increasing temperature and fall with the increasing pressure. In addition, a correlation was proposed to predict the isobaric molar heat capacities of methyl caprate and methyl laurate. The absolute relative deviations between predicted and experimental isobaric molar heat capacities are less than 0.8%.
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INTERNATIONAL JOURNAL OF THERMOPHYSICS
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2026
·Vol. 47
·期 7
·112
·
IF 3.6
Shi Jiahao,Wang Jianan,Feng Junyu,Zhang Ke,Bi Shengshan
This study presents an investigation into the liquid density of isobutanol and 2-butanol at selected temperatures from 303.15 K to 383.15 K and pressures up to 200 MPa using a variable-volume high-pressure system. The apparatus was validated with n -decane, and the measured densities agreed with literature values within 0.2 %. The expanded relative uncertainty of density was estimated to be 0.27 % with a coverage factor of k = 2. The experimental data were correlated with the Tammann–Tait equation, yielding average absolute deviations below 0.05 % for both butanol isomers. The isothermal compressibility and isobaric thermal expansivity were derived from the fitted correlations to characterize the pressure and temperature dependence of the volumetric properties. In addition, the pure-component parameters for the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state were optimized using the 2B association scheme. The optimized PC-SAFT model reproduced the measured densities with average absolute deviations lower than 0.2 %. The results expand the available high-pressure density database for these two butanol isomers and may be useful for thermodynamic modeling and engineering calculations within the investigated temperature and pressure ranges.
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Corrosion Communications
·
2025
·
IF 9.5
Yangmin Wu,Changchun Zhao,Wenjie Zhao
It is challenging for organic coatings with solely physical barrier property to achieve long-term corrosion protection on metal equipment, especially in harsh deep sea environments. Here, we utilized DL-phenylalanine to modify Ti 3 C 2 T x nanosheets via noncovalent interaction to obtain DL@Ti 3 C 2 T x hybrid additives, which significantly improved the corrosion protection ability of epoxy coating (EP). The impedance modulus of DL@Ti 3 C 2 T x /EP composite coating with a thickness of 50 μm was two orders of magnitude higher than that of pure EP after 240 h immersion under 30 MPa hydrostatic pressure. The adhesion strength of DL@Ti 3 C 2 T x /EP composite coating remained at a favorable value of 1.84 MPa after long-term immersion in a harsh environment, which was twice as high as that of pure EP coating. In addition, the active corrosion resistance property of DL@Ti 3 C 2 T x /EP coating was investigated via the local electrochemical impedance spectroscopy (LEIS) measurement. The improved protection ability of DL@Ti 3 C 2 T x /EP was benefited from the synergistic effects of the superior physical barrier property of Ti 3 C 2 T x nanosheets and the self-healing feature provided by DL molecules. The corrosion protection and failure mechanisms of composite coating were discussed in detail, supplying broader platforms for constructing active/passive integrated anti-corrosion coatings in harsh deep sea environments.
研究领域:
材料科学
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腐蚀防护
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纳米技术
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表面工程
·
电化学
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高影响因子
Materials Today Communications
·
2022
·
IF 3.662
Pingping Zhang,Ning Ding,Binyang Du,Jingjing Nie
How to balance the mechanical strengths and water content of synthetic hydrogels, and design and prepare new hydrogel systems simultaneously with mechanical strengths over MPa level and equilibrium water content (EWC) above 70 % remain difficult and challenging tasks. In this work, multi-physically cross-linked poly(acrylamide- co -acrylic acid)/sodium alginate-tamarind gum/ferric ion/tetraborate (P(AM- co -AA x )/SA y -TG y /Fe 3+ /B) hydrogels simultaneously with MPa level mechanical strengths and high EWC above 70 % were successfully synthesized by combining the advantages of SA and TG. TG played a role of increasing hydration of the hydrogels, rendering the high equilibrium water content, while SA was mainly responsible for providing mechanical strengths to the hydrogels via ionic coordination bonds with ferric ions. The optimal P(AM- co -AA 0.175 )/SA 3 -TG 3 /Fe 3+ /B hydrogels exhibited high elastic modulus of ∼5.39 MPa, fracture strength of ∼3.24 MPa, elongation strain at break of 121 %, toughness of ∼2.58 MJ/m 3 , and EWC of ∼71.6 %. The P(AM- co -AA x )/SA y -TG y /Fe 3+ /B hydrogels also exhibited effective energy dissipation mechanisms, excellent self-recovery properties and environmental stabilities in wide temperature range of 0–75 °C and pH range of 3–11. By soaking in 0.9 % NaCl solution, the obtained P(AM- co -AA 0.175 )/SA 3 -TG 3 /Fe 3+ /B/NaCl hydrogels exhibited excellent electrical conductivity and strain sensitivity, which could be used as strain sensors.
研究领域:
材料科学
·
生物医学工程
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高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2020
·
IF 3.232
Meiling Ding,Kun Wang,Min Fang,Weiju Zhu,Longchao Du,Cun Li
Mercaptopropionic acid (MPA) capped CdTe quantum dots (MPA-CdTe QDs) were synthesized in aqueous medium by hydrothermal method , which modified by Fe 3+ could be used as a fluorescent probe to detect ascorbic acid (AA). MPA-CdTe QDs fluorescence probe could be used as successive sensor for metal ions and AA with “on-off-on” process. The fluorescence of QDs was quenched after adding Fe 3+ to MPA-CdTe QDs. Then, the fluorescence of the Fe 3+ @MPA-CdTe QDs can be sensitively turned on by AA to give an “on–off–on” fluorescence response according to the oxidation–reduction between Fe 3+ and AA. There was a linear relationship between fluorescence intensity quenching value and the concentration of Fe 3+ in the range of 2–10 μM since Fe 3+ sensitively reacted with CdTe QDs. The linear detection range for AA was 0.1–1 μM with a limit of detection of 6.6 nM. The principle is proved by fluorescence emission spectroscopy, nuclear magnetic resonance spectroscopy. The proposed method is successfully used to detect the AA in human plasma sample.
研究领域:
分析化学
·
生物化学
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PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2019
·
IF 2.298
Junshuai Chen,Qi Zhou,Taotao Zhan,Maogang He,Ying Zhang
Methyl hexanoate, which was found to be the simplest methyl ester to present a strong cool flame behavior, is expected to be one of the main components of biodiesels. Details of the experimental speeds of sound in methyl hexanoate are scarce up to now. Therefore, the speed of sound in liquid methyl hexanoate was measured by the Brillouin light scattering method in the temperature range of 297.83–588.07 K and at pressures of up to 10 MPa. The relative uncertainty of the speed of sound experimental system is estimated to be less than 0.43%, and when considering the impurity of the sample, the relative uncertainty is 0.47%. The variation of the speed of sound with the temperature and pressure was analyzed. Besides, the correlation for the speed of sound as a function of temperature and pressure is presented based on the experimental data. The absolute average of relative deviation between the experimental data and the calculated results is 0.44%.
研究领域:
化学工程
·
物理化学
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Fei Yuan,Hua Li,Long Li,Yafei Guo,Shiqiang Wang,Tianlong Deng
Considering the significance of fundamental phase equilibrium data in resource exploitation from salt lake brines, the solid–liquid phase equilibria of the ternary system (KBO2 + K2SO4 + H2O) at 288.15, 308.15 K, and 0.1 MPa were investigated using the isothermal dissolution method. Along this line, the solubilities and physicochemical properties of densities were experimentally determined. Based on the experimental data, phase diagrams and the related physicochemical property diagrams against composition were plotted. It was found that there are one invariant point, two univariate solubility curves, and two crystalline regions corresponding to potassium metaborate hydrate (KBO2·1.33H2O) and arcanite (K2SO4) in the ternary phase diagrams at 288.15 and 308.15 K. In addition, they belong to the hydrate type I and neither double salt nor solid solution was formed. The distributive behaviors of density against the concentration of KBO2 in the equilibrium solution at two temperatures were similar. Moreover, the theoretical values of density were calculated, which were found to be consistent with the experimental values, further demonstrating the accuracy and reliability of this work.
研究领域:
化学
·
物理化学
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2019
·
IF 2.994
Chunhua Li,Li Zhu,Weixia Yang,Xie He,Haiping Zhao,Wenzhi Tang,Tianli Yue,Zhonghong Li
It is imperative to exploit simple and rapid methods for the detection of total iron in foods to ensure food quality and human health. Herein, we construct the MIL-53(Al)-NH 2 -MPA nanosensor synthesized by post-synthetic modification process for fluorescent detection of total iron in food matrix. The nanosensor emits intense blue fluorescence with excellent stability. The fluorescence can be efficiently quenched by Fe(III) due to the fact that Fe(III) can preferentially bind with O-quinone bands or –NH 2 of MIL-53(Al)-NH 2 -MPA to form strong coordination complex, and that the heteroatoms (N, O and S) in MIL-53(Al)-NH 2 -MPA can donate lone-pair electrons to Fe(III) to promote the electron transfer. Moreover, the competitive absorption of excitation energy of MIL-53(Al)-NH 2 -MPA by Fe(III) endows the nanosensor with superior sensitivity. The fluorescent sensor exhibits excellent anti-interference performances toward other metal ions, and reveals a LOD of 0.36 μM with the broad linear range of 0–110 μM for the detection of Fe(III). Satisfactory recoveries of 92.90–112.70% with RSDs of 0.54–2.48% have been achieved in water and food samples, which are well agreement with inductively coupled plasma mass spectrometry (ICP-MS) (P > 0.05), indicating that MIL-53(Al)-NH 2 -MPA is applicable for detecting total iron in food matrix.
研究领域:
分析化学
·
食品科学
·
材料科学
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高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Qiao Yan,Pingping Zhang,Menglin Wang,Ling Ma,Ke Wang,Kaoqi Lian
This study aimed to synthesize a novel magnetic covalent organic framework (COF)-based material and establish an efficient magnetic solid-phase extraction (MSPE) method for the determination of benzimidazoles (BZDs) in honey. Given the abundant nitrogen atoms in BZDs, the target material (Fe₃O₄@SiO₂@MPA-TAPT-COF) was designed with Fe₃O₄ as the magnetic core and a COF shell polymerized from 5-bromobenzene-1,3-dicarbaldehyde (MPA) and 4,4',4''-(1,3,5-triazine-2,4,6-triyl) trianiline (TAPT). The synthesized Fe₃O₄@SiO₂@MPA-TAPT-COF exhibited considerable specific surface area, good magnetic responsiveness, and excellent reusability. An MSPE method using Fe₃O₄@SiO₂@MPA-TAPT-COF as the adsorbent was developed for the purification of BZDs in honey, followed by quantification via ultra-performance liquid chromatography–tandem mass spectrometry (UPLC-MS/MS). This method featured simple operation, high sensitivity, and good efficiency. Under optimized MSPE conditions, It showed good linearity for 17 BZDs in the concentration range of 0.2–100 μg/L, with correlation coefficients (R²) ≥ 0.9991. The limits of detection (LODs) for BZDs in honey were as low as 0.009–0.342 μg/kg. For spiked honey samples, the recoveries of the 17 target BZDs ranged from 61.44 % to 118.90 %.These results confirm that Fe₃O₄@SiO₂@MPA-TAPT-COF is a promising adsorbent for sample pretreatment, and the developed method provides a reliable tool for the sensitive and efficient analysis of BZDs in honey.
研究领域:
分析化学
·
食品安全
·
环境科学
·
材料科学
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高影响因子
危险品化学品经营许可证（带存储）