JOURNAL OF MOLECULAR LIQUIDS
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2017
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IF 3.648
Jing Zhang,Taotao Fu,Chunying Zhu,Youguang Ma
Densities and viscosities of glycine, L-alanine, L-valine, L-threonine and L-arginine in aqueous (0.1–0.5) mol·kg − 1 myo -inositol solutions were measured at T = (293.15, 303.15, 313.15 and 323.15) K and p = 0.101 MPa. The volumetric properties such as the apparent molar volume ( V φ ), the limiting partial molar volume ( V φ 0 ), the limiting partial molar volumes of transfer (Δ tr V φ 0 ), the limiting apparent molar expansibility ( E 2 0 ), Hepler's constant and the isobaric thermal expansion coefficient ( α 2 ) were calculated through density. The viscometric properties such as the B -coefficient, the free energies of activation per mole of solvent (Δ μ 1 0 ≠ ) and solute (Δ μ 2 0 ≠ ) were obtained from the experimental viscosity data. The derived parameters hydration number and solvation number were also calculated through apparent molar volume and B -coefficient. From the volumetric and viscometric properties, the solute-solute and solute-solvent interactions in the studied systems were analyzed on the basis of co-sphere overlap model and transition state theory . Finally, the group contribution method was applied to calculate the contribution of (NH 3 + , COO − ), CH 2 , OH and CNHNHNH 2 of amino acids to V φ 0 , B -coefficient and Δ μ 2 0 ≠ .
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2015
·Vol. 26
·期 10
·7823-7828
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IF 1.569
Zhang Biao,Ye Feng,Liu Shichao,Liu Qiang,Gao Ye
A simple method, which include cold isostatic pressing and vacuum assisted infiltration, that can significantly improve the filler content, was employed to fabricate Bisphenol-A cyanate ester resin (BADCy)/Ni 0.5 Ti 0.5 NbO 4 composites with high-k and ultra-low-loss. Results show that briquetting pressure and sintering temperature for fabricating Ni 0.5 Ti 0.5 NbO 4 porous preforms have a great influence on the properties of BADCy/Ni 0.5 Ti 0.5 NbO 4 composites. The optimal process for the fabrication of BADCy/Ni 0.5 Ti 0.5 NbO 4 composites is fixing the briquetting pressure at 90 MPa and sintering temperature at 700 °C. The dielectric constant and loss of the composites are 22.79 and 4.17 × 10 −3 at 9041 MHz, respectively. Properties of this kind of composites can meet the requirements for high-k and ultra-low-loss PCB application.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2015
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IF 2.037
Rongrong Li,Jian Wan,Yingjie Zhang,Danxia Liang,Bin Zhang,Chenghong Li
The equilibrium solubility of sodium 1-naphthalenesulfonate in binary NaCl + water, Na2SO4 + water, and C2H5OH + water solvent mixtures was measured by a steady-state method at elevated temperatures from (278.15 to 323.15) K. The results of these data were correlated by a modified Apelblat equation. The dissolution enthalpy (ΔHd) and entropy (ΔSd) of sodium 1-naphthalenesulfonate in solutions of different mole fraction were obtained.
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Journal of the American Chemical Society
·
2024
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IF 14.4
Xiaoyu Song,Xinsheng Liu,Danwen Zhang,Jingyan Liao,Siqi Zhu,Wei Zheng
Two-dimensional organic–inorganic hybrid layered perovskites have emerged as a new generation of optoelectronic materials. However, the thermochromism in organic–inorganic hybrid layered perovskites has been rarely explored in depth. A further understanding of the mechanism is necessary and favorable for the application. Here, transparent centimeter-sized single crystals of the organic–inorganic hybrid layered perovskite (C6H5C2H4NH3)2PbBr4 (PEA2PbBr4) were synthesized using an improved evaporation method. As a typical organic–inorganic hybrid layered perovskite, the PEA2PbBr4 single crystal shows high-contrast and progressive thermochromism exhibiting a change from colorlessness and transparency to lemon yellow in a wide temperature range of 200–450 K. Based on the calculation through the Varshni equation, the temperature-induced bandgap change rate directly associated with the high-contrast thermochromism of PEA2PbBr4 reaching 0.8 meV/K. This value is higher than that of many three-dimensional perovskites and traditional IV–III semiconductors. Furthermore, the temperature-dependent 193 nm photoluminescence spectra suggest that this high temperature-induced bandgap change rate of PEA2PbBr4 is a result of the competitive interaction between lattice thermal expansion and electron–phonon coupling (Fröhlich coupling coefficient ΓLO = 2.215). Based on the characteristics introduced above, PEA2PbBr4 as an organic–inorganic hybrid layered perovskite has a better performance in achieving the balance between high-contrast and high room-temperature transmittance. Therefore, PEA2PbBr4 is a material with great potential in applications like temperature-indicating labels. This work provides valuable insights into the thermochromism of layered perovskites, offering a new material system and approach for developing thermochromic materials with higher sensitivity and efficiency.
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PubMed
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yunqi Wu,Tinggui Yan,Weixue Xiang,Peixu Zhu,Nanxi Luo,Banglian Tang,Miao Luo
Co-combusting biomass with sewage sludge can effectively inhibit the release of alkali metals. In addition to calcium phosphates, AlPO 4 and FePO 4 are typical phosphates in fresh sludge, resulting from phosphorus removal process compliant discharge. However, the inhibitory effect of AlPO 4 and FePO 4 on potassium release have rarely been studied. This oversight may stem from the absence of AlPO 4 and FePO 4 in high-temperature ash, which instead indicates their preferred reactivity. Thus, we proposed the hypothesis regarding whether the fixation effect of AlPO 4 and FePO 4 on potassium occurs earlier than that of calcium phosphate. This research investigated the interactions and inhibitory effects of these phosphates on potassium release during the co-combustion. In this simplified system using model compounds, the conversion of volatile potassium salts was quantitively assessed by measuring the content of produced water-soluble K-phosphates. The interaction mechanism has been discussed with multiple characterization methods. The results demonstrate a significant inhibitory effect of phosphates on KOH, KNO 3 and K 2 CO 3 , with the effectiveness ranking as follows: AlPO 4 > FePO 4 > Ca 3 (PO 4 ) 2 . Over 80 % of potassium remained as soluble K-phosphates in samples treated with AlPO 4 or FePO 4 at 1000 ℃. In contrast, none of the three additives exhibited a significant inhibitory effect on KCl and K 2 SO 4 . However, the priority of the reactions converting KOH, KNO 3 and K 2 CO 3 into K-phosphates by using AlPO 4 and FePO 4 , along with the stability of the produced phosphates, suggests a promising approach to enhance the formation of more potassium phosphate while reducing KCl—the most problematic volatile component—thereby effectively mitigating potassium release.
CAS / MDL:
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LWT-FOOD SCIENCE AND TECHNOLOGY
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2024
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IF 6
Mengjing Zhou,Bin Li,Aolin Wu,Zhigang Hu,Jizhen Liu,Ying Wang,Haiying Liu
This study utilized beeswax and k-carrageenan as gelling agents to prepare oleogels and hydrogels, respectively. The amalgamation of the two gels in frozen water led to the formation of bigels. With the goal to improve the consistency and long-lasting nature of the bigel, starch was added to the mixture. A study was then done to evaluate how the addition of starch affected the thermal, mechanical, and rheological properties, as well as the capacity of the bigel to withstand freeze-thaw resilience. The results indicated that the bigel without starch exhibited a melting temperature comparable to that of the oleogel. However, the inclusion of starch resulted in a decrease in the melting temperature to 44.88 °C, accompanied by a wider endothermic peak. The enthalpy of the bigel with additional starch dramatically increased to 42.227 J/g. The addition of starch significantly improved the mechanical characteristics of the bigel, resulting in an average increase in hardness of 32.3% and Young's modulus of 54.2%. Furthermore, the bigel demonstrated exceptional freeze-thaw stability, exhibiting an average enhancement of around 5% when compared to the equivalent without starch. The use of hydrogel enhanced the thermal durability of the bigel, preventing structural collapse when the ambient temperature rose. This study proposes a method to produce starch bigels that possess excellent freeze-thaw stability and rheological properties.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
·
IF 2.1
Xiangyu Sun,Hanbing Liang,Dongmei Zhang,Yimin Zhu,Bin Wang,Lingfeng Gao,Huaiqing Zhao,Gengxiu Zheng,Xia Jiang,Guan Wang
The solubility of 1,3-diaminoguanidine monohydrochloride (DAMG) was determined in 12 monosolvent systems, including water, methanol, ethanol, n-propanol, n-butanol, isopropanol, isobutanol, tetrahydrofuran (THF), ethyl acetate, acetonitrile, hexane, and heptane using a gravimetric method within the temperature range of 273.15–323.15 K under 101.3 kPa. DAMG exhibited the highest solubility in water followed by methanol and ethanol, which were significantly higher than other selected solvents, and the solubility of DAMG increases with temperature rises in all selected solvent systems. The obtained solubility data were correlated with modified Apelblat model, Van’t Hoff model, λh equation, and Wilson model, and the Van’t Hoff model and the λh equation show the excellent fitting performance. The Hansen solubility parameter (HSP) analysis revealed that van der Waals forces mainly affected the dissolution behavior of DAMG, while polarity had a significant effect on it. In addition, the intermolecular energies calculated by the molecular dynamics simulation (MD) and the radial distribution functions (RDF) derived from the MD trajectories support this conclusion. Moreover, the thermodynamic properties were evaluated using Van’t Hoff model, which indicated that the mixing process was mainly driven by enthalpy.
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ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Ruiqing Hua,Caiyun Xu,Hongwei Yang,Deyu Qu,Ruiming Zhang,Dan Liu,Haolin Tang,Junsheng Li,Deyang Qu
A rechargeable aqueous hybrid ion alkaline battery, using a proton and a potassium ion as charge carriers for the anode and cathode, respectively, is proposed in this study by using well-developed potassium nickel hexacyanoferrate as the cathode material and mesoporous carbon sheets as the anode material, respectively. The constructed battery operates in a concentrated KOH solution, in which the energy storage mechanism for potassium nickel hexacyanoferrate involves the redox reaction of Fe2+/Fe3+ associated with potassium ion insertion/extraction and the redox reaction of Ni(OH)2/NiOOH. The mechanism for the carbon anode is electrochemical hydrogen storage. The cathode made of potassium nickel hexacyanoferrate exhibits both an ultrahigh capacity of 232.7 mAh g–1 under 100 mA g–1 and a consistent performance of 214 mAh g–1 at 2000 mA g–1 (with a capacity retention of 92.8% after 200 cycles). The mesoporous carbon sheet anode exhibits a capacity of 87.6 mAh·g–1 at 100 mA g–1 with a good rate and cyclic performance. The full cell provides an operational voltage of 1.55 V, a capacity of 93.6 mAh g–1 at 100 mA g–1, and 82.4% capacity retention after 1000 cycles at 2000 mA g–1 along with a low self-discharge rate. The investigation and discussion about the energy storage mechanisms for both electrode materials are also provided.
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Food Bioscience
·
2025
·
IF 5.9
Lingling Bai,Yurui Wu,Huijin Xu,Jiyuan Yang,Yiting Lu,Wenge Yang,Yonghong Hu
In this study, K-carrageenan (KC)/poly(lactic acid) (PLA) composite nanofiber membranes loaded with vitamin C (VC)/2-hydroxypropyl-β-cyclodextrin (HP-β-CD) inclusion complexes were prepared by electrostatic spinning for blueberry preservation. A scanning electron microscope, electronic universal testing machine, and other instruments were used to analyze the apparent and mechanical properties of the membrane as well as the physicochemical indexes of blueberries during the preservation process. The loading of the inclusion raised the average diameter of the nanofibers membrane, reduced the crystallinity, and hydrophobicity, and improved the thermal stability of the fibers membrane. The release curves showed that encapsulating the inclusion complex in KC/PLA significantly prolonged the release time of VC. The membranes exhibited better antimicrobial properties as well as higher antioxidant properties in vitro and in vivo . These results indicate that the developed antimicrobial membrane has good application prospects in food packaging.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2025
·
IF 2.1
Xinyu Liu,Yuhang Chen,Zhao Lei,Long Cheng,Maogang He,Ying Zhang
Isooctane is an ideal gasoline component with a high octane number and low volatility. However, there is a lack of research on the thermal properties of isooctane, especially near the critical point. This work uses dynamic light scattering to measure the thermal diffusivity of isooctane in the temperature range of (298.15–583.15) K, along 8 isobaric lines p = (0.1, 2.0, 2.5, 2.7, 3.0, 3.5, 5.0, 7.5) MPa, and analyzes the trend of thermal diffusivity with temperature and pressure. The average relative combined expanded uncertainty of the thermal diffusivity is 0.0214. Meanwhile, the experimental data were compared with the calculated values from thermal conductivity, and the absolute average values of the relative deviation and maximum deviation were 2.88 and 8.22%, respectively.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yanbing Li,Zizhao Guo,Ya Qiu,Wenshen Yang,Lin Lang,Chuangzhi Wu,Chunhuan Luo,Xiuli Yin
Developing efficient, stable adsorbents for post-combustion CO 2 capture remains challenging, owing to competitive H 2 O adsorption, active component loss, and inactive byproduct formation. In this work, we report a one-step pyrolysis-activation strategy synthesizing herb-residue biochar co-anchored with K 2 CO 3 and K 2 FeO 4 (HPPF), enabling stable CO 2 capture under humid conditions via synergistic K Fe interactions. Compared with conventional post-impregnation methods, this approach enhances microporosity through molten-salt activation and reduces K vaporization by 56 % via Fe-O-K interfacial bonding, while disrupts K Ca interactions to prevent K 2 Ca(CO 3 ) 2 formation. The HPPF adsorbent exhibits a superior CO 2 capacity of 2.20 mmol g −1 at 60 °C under humid conditions (20 % CO 2 ), outperforming K 2 CO 3 -loaded biochar (HPC, 1.57 mmol g −1 ) and demonstrating a balanced H 2 O/CO 2 co-adsorption ratio (0.96, compared with 3.21 for HPC). In situ FTIR/XRD analyses reveal Fe accelerats the direct conversion from K 2 CO 3 to KHCO 3 , without formation of the hydrated intermediates. Furthermore, multi-model kinetic fitting confirmed Fe’s dual role in enhancing surface reactivity and modifying diffusion behavior. HPPF retained 99.1 % of its initial capacity after over nine adsorption-desorption cycles, demonstrating exceptional structural reversibility and cyclic durability. The estimated raw material cost (~$3.79 per kg CO 2 ) further supports its practical viability for scalable, low-cost carbon capture. This stable cycling capability of HPPF allows its incorporation into delayed feedback carbon cycles. In such systems, biochar accumulated during pyrolysis batch processes can progressively offset the CO 2 emissions generated by the biomass, offering a viable route for carbon-negative utilization.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Lingli Zhang,Chunjuan Huang
The equilibrium solubility of 6-bromo-2-methylquinoline in various binary blends [ethanol/isopropanol/N,N-dimethylformamide (DMF)/methanol + water] and ten monosolvents (methanol, ethanol, n-propanol, isopropanol, ethyl acetate, toluene, acetone, acetonitrile, DMF, and water) was studied by the isothermal method at 278.15–323.15 K under 101.2 kPa. Among the ten pure solvents, the maximum solubility in mole fraction was obtained in toluene (3.318 × 10–2), followed by ethyl acetate (2.991 × 10–2), acetone (2.764 × 10–2), acetonitrile (2.528 × 10–2), DMF (2.220 × 10–2), n-propanol (9.141 × 10–3), isopropanol (8.123 × 10–3), ethanol (3.896 × 10–3), methanol (9.981 × 10–4), and water (2.888 × 10–5) at 323.15 K. In four solvent mixtures, the maximum and minimum solubilities were obtained in the (DMF + water) and (methanol + water) blends. The solubility of 6-bromo-2-methylquinoline in pure solvents was only affected by temperature and calculated by the Apelblat, van’t Hoff, and NRTL models. The Jouyban–Acree (J–A), van’t Hoff–Jouyban–Acree (V–J–A), and modified Apelblat–Jouyban–Acree (A–J–A) models were used to evaluate the solubility data in mixed systems. The calculation of solvent effect deeply explored the dissolution behavior of 6-bromo-2-methylquinoline from the molecular point of view, and the results showed that the interaction between the solute and solvent was dominant. The apparent thermodynamic properties of 6-bromo-2-methylquinoline in pure solvents were obtained by van’t Hoff plots.
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