JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Yameng Wan,Pengshuai Zhang,Haixia He,Jiao Sha,Kunpeng Yang,Tao Li,Baozeng Ren
Solubility of phenylphosphonic acid (PPOA) in 15 solvents (methanol, ethanol, n-propanol, isopropyl alcohol, 1-butanol, 1-pentanol, 1-hexanol, 1-heptanol, 1-octanol, 2-methoxyethanol, 2-ethoxyethanol, 2-propoxyethanol, 2-butoxyethanol, acetone, and 1,4-dioxane) was measured by the isothermal saturation method under 0.1 MPa. Solubility of PPOA increased with increasing temperature. The interaction energies between PPOA and selected solvents were calculated by molecular simulation to explain the solubility order. Experimental solubility was correlated by five thermodynamic models including the modified Apelblat equation, uniquac, the nonrandom two-liquid (NRTL)-segment activity coefficient (SAC), NRTL, and the Wilson model. The modified Apelblat equation, NRTL, and NRTL-SAC were more applicable for fitting of solubility data of PPOA. Thermodynamic properties of the mixing process including the mixing Gibbs energy (ΔmixG), mixing enthalpy (ΔmixH), and mixing entropy (ΔmixS) were investigated by the Wilson equation. The mixing process was spontaneous, exothermic, and entropy-driven.
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
高影响因子
E-POLYMERS
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2023
·Vol. 23
·期 1
·
IF 3.7
Zhilin Cao,Changxin Ren,Zhengzhou Wang
Epoxy resin (EP)/cyanate ester (CE) copolymer, an important structural material with high temperature resistance and low dielectric constant in aerospace, microelectronics, and related fields, is still of great flammability danger. In this work, copper phenyl phosphonate (CuPP), a flame retardant used in EP/CE copolymer was synthesized by the reaction of phenyl phosphonic acid and copper nitrate trihydrate. The fire and thermal behavior of EP/CE/CuPP composites were studied in detail. The results suggested that the UL-94 rating and limiting oxygen index of EP/CE composite with 5 wt% CuPP (EP/CE/CuPP5) reach V-1 level and 30.6%, respectively. Compared with pure EP/CE copolymer, the peak heat release rate and total heat release values of EP/CE/CuPP5 decreased by 34.5% and 18.9%, respectively. The glass transition temperature of EP/CE/CuPP composite is higher than that of pure EP/CE copolymer, suggesting that the fire-retardant composite has higher work temperature and better heat resistance.
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
高影响因子
Catalysts
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2018
·Vol. 8
·期 9
·394
·
IF 3.465
Tian Zhao,Ming Dong,Ling Yang,Yuejun Liu
Nowadays, the controllable synthesis of stable hierarchical metal–organic frameworks (MOFs) is very important for practical applications, especially in catalysis. Herein, a well-known chromium–benzenedicarboxylate metal–organic framework, MIL-101(Cr), with a stable hierarchical structure, was produced by using phenylphosphonic acid (PPOA) as a modulator via the hydrothermal method. The presence of phenylphosphonic acid could create structural defects and generate larger mesopores. The synthesized hierarchical MIL-101(Cr) possesses relatively good porosity, and the larger mesopores had widths of 4–10 nm. The hierarchical MIL-101(Cr) showed significant improvement for catalytic activity in the oxidation of indene. Further, the presence of a hierarchical structure could largely enhance large dye molecule uptake properties by impregnating.Keywords:MIL-101(Cr);phenylphosphonic acid;hierarchical;enhanced catalytic activity;large molecule uptake
研究领域:
材料科学
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催化化学
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产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
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2022
·
IF 7.392
Bo Liu,Siming Yan,Yi He,Teng He,Yahui He,Ruxia Song,Zhifei Zhang,Hongjie Li,Jinxue Song,Zhiyuan Li
In this work, with the help of pulsed electrodeposition technology, Ni–W/ZrPP composite coatings on carbon steel surfaces were fabricated. The enhancing effects of inorganic layered alpha-zirconium phosphate (αZrP) and organic zirconium phenylphosphonate (ZrPP) on the surface morphology, microhardness, wear resistance and corrosion resistance of Ni–W coatings were also investigated. The result shows, Ni–W/ZrPP composite coating exhibits the most complete and dense surface morphology without any pinholes and generation of microcracks. Furthermore, the embedding of ZrPP also maximizes the wear and corrosion resistance of the Ni–W coating. This can be reflected by the fact that the Ni–W/ZrPP composite coating has the shallowest and narrowest wear section and the lowest average friction coefficient (0.312). In 3.5 wt.%NaCl solution, the Ni–W/ZrPP composite coating has the highest corrosion potential (E corr = −0.28 V) and the lowest corrosion current density (i corr = 2.3 μA cm −2 ), which show the best corrosion resistance. Relevant mechanistic studies have proven that embedding ZrPP with larger interlayer spacing in the coating is beneficial to promote the interlayer slip of 2D materials and to from frictional transfer films. The hydrophobic group and lamellar structure at the end of ZrPP are also contributors to build a physical barrier and prevent corrosive media from entering the coating.
研究领域:
材料科学
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表面工程
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产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
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2019
·
IF 1.354
Guichen Gong,Jie Liu,Yuexin Han,Yimin Zhu
A novel collector, 2-carboxyethylphenylphosphinic acid (CEPPA), was first used in the flotation of cassiterite. The flotation performances and the adsorption mechanism of CEPPA on cassiterite were investigated by flotation tests, adsorption experiments, zeta potential measurements, Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) analyses. The results indicated that CEPPA had strong collecting power for cassiterite and fluorite over a wide pH range but little on quartz. In the separation of the cassiterite–quartz mixture, a concentrate containing 90.9% SnO2 was obtained with a recovery of 95.7% at pH 7.0. The cassiterite in the cassiterite–fluorite mixture could be effectively separated using 300 mg/L sodium silicate in conjunction with 60 mg/L CEPPA, and a concentrate with a grade of 90.3% SnO2 and a recovery of 92.6% was achieved at neutral pH. Zeta potential analysis demonstrated that the adsorption process involved both physical and specific forces. The results of FTIR and XPS further suggested that the four O atoms of CEPPA reacted with the Sn atoms on cassiterite surface, forming a complex which was similar to the Sn–CEPPA precipitate, and hydrogen bonding adsorption could have taken place between the terminal hydroxyl groups and CEPPA anions.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
·
IF 9.463
Xian-Ling Fu,Hong-Liang Ding,Xin Wang,Lei Song,Yuan Hu
A two-dimensional layered zirconium phosphonate (ZrPP) was synthesized from phenylphosphonic acid, and its structure was well characterized. ZrPP exhibited a larger lamellar spacing distance (1.474 nm) than zirconium phosphate (ZrP) (0.743 nm) so that ZrPP can be better dispersed within the epoxy matrix. The 3 wt% ZrPP-EP composite showed excellent flame retardancy in terms of lower total heat release and total smoke production that was decreased by 11.2% and 17.5%, respectively. Moreover, ZrPP can promote the formation of a dense and compact char layer, resulting in a higher char yield of 8.5% and 21.9% under air and nitrogen atmosphere, respectively, in the TGA test. which can be served as a physical barrier to isolate oxygen, protect the internal matrix, and suppress smoke release during combustion. Furthermore, the tensile and impact strength of 3 wt% ZrPP-EP composite was 45.6% and 63.8% higher than that of unmodified EP, respectively, which was also superior over 3 wt% ZrP-EP composite.
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
高影响因子
FLUID PHASE EQUILIBRIA
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2014
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IF 2.241
Guo-Min Yu,Li-Sheng Wang,Chao-Jun Du,Jian Sun
A phosphorous flame retardant of phosphoric acid , P , P ′-1,4-phenylene P , P , P ′, P ′-tetraphenyl ester (PAPTE) was synthesized by diphenyl chlorophosphate and hydroquinone . The structural features of PAPTE were investigated with mass spectra (MS), infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR) and high-performance liquid chromatograph (HPLC) methods. The thermal behavior of PAPTE was analyzed with differential scanning calorimeter (DSC) and thermogravimetric analysis (TGA) instruments. A static analytic method was used to measure the solubilities of PAPTE in the several selected pure solvents, which are methanol, ethanol, acetone, ethyl acetate , acetonitrile , methyl acetate , toluene, ether, n -propanol, i -propanol, where the temperatures range is from 288.25 to 333.45 K. The experiments were also performed in the binary mixed solvents of acetone and methanol. Several thermodynamic models were used to correlate the experimental solubility data, such as Wilson, nonrandom two-liquid (NRTL), UNIQUAC equations. The solubility data of PAPTE in binary solvents were correlated with the modified Wilson model. The calculated results showed that those models can excellently reproduce the experimental data and the UNIQUAC equation reveals the better ability in correlation. Using the Scatchard–Hildebrand methodology, the activity coefficients, solubility parameter of the solute and the partial molar excess enthalpies at infinite dilution were calculated.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
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2020
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IF 6.146
Mei-Rong Liu,Yang-Peng Lin,Kai Wang,Shumei Chen,Fei Wang,Tianhua Zhou
Cobalt-based phosphate/phosphonates are a class of promising water oxidation catalysts at neutral pH. Herein, we reported a facile hydrothermal synthesis of various nanostructured cobalt phenylphosphonates. It is found that the number of hydroxyl group of structure-directing reagent is crucial for the construction of 3D hierarchical structures including hierarchical nanosheet flower-like assemblies and nanothorn microsphere. These samples were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, infrared, and X-ray photoelectron spectroscopy techniques. They can act as highly efficient electrocatalysts for the oxygen evolution reaction at neutral pH. Among these, hierarchical cobalt phenylphosphonate nanothorn flowers present excellent performance, affording a current density of 1 mA cm −2 required a small overpotential of 393 mV. This work offers a new clue to develop high-performance metal phosphonate/phosphate catalysts toward electrochemical water oxidation.
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
MINERALS ENGINEERING
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2022
·
IF 5.479
Lijia Zhu,Jie Liu,Yimin Zhu,Guichen Gong,Yuexin Han
As an essential raw material for the tin industry, cassiterite ore needs to be effectively separated and purified, and the removal of impurities such as fluorite becomes the key to cassiterite flotation. In this study, the flotation separation of cassiterite (SnO 2 ) and fluorite (CaF 2 ) was enhanced by using hydroxylcitric acid (HCA) as fluorite inhibitor and 2-carboxyphenyl phosphonic acid (CEPPA) as collector. With a reagent scheme of 120 mg/L CEPPA and 4.5 mg/L HCA at pH 10.0, the flotation recovery of cassiterite and fluorite was 92.80% and 13.57%, respectively. Under the same experimental conditions of artificially mixed mineral flotation, the flotation index of cassiterite concentrate grade 78.19% and recovery 90.29% was obtained. The selective adsorption mechanism of CEPPA and HCA on minerals was investigated by Zeta potential, Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS). The results showed that CEPPA anions had chemically adsorbed on cassiterite and fluorite, and the adsorption of HCA on fluorite surface was stronger than that on cassiterite surface. XPS analyses further confirmed that Ca sites exposed on fluorite had a stronger affinity for HCA than cassiterite. Furthermore, the addition of HCA had little effect on the adsorption of CEPPA on cassiterite, while the strong chemisorption of HCA on fluorite surface prevented the adsorption of CEPPA on fluorite. These results provide a theoretical basis and promising new strategy for the flotation separation of cassiterite and fluorite.
研究领域:
矿物加工工程
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表面化学
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产品关联
DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2020
·Vol. 31
·期 6
·1330-1339
·
IF 2.578
Ying Pan,Wei Cai,Jia Du,Lei Song,Yuan Hu,Hongting Zhao
In the present work, lanthanum phenylphosphonate (LaPP)–based multilayered film was fabricated on the surface of flexible polyurethane (PU) foam by layer-by-layer self-assembled method. The successful deposition of the coating was confirmed by scanning electron microscopy (SEM) and energy-dispersive X-ray (EDX). Subsequently, the thermal decomposition and burning behavior of untreated and treated PU foams were investigated by thermogravimetric analysis (TGA) and cone calorimeter, respectively. The TGA results indicated that T max2 of treated PU foams were increased by approximately 15°C to 20°C as compared with untreated PU foam. The peak heat release rate (PHRR) and total heat release (THR) of PU-6 (with 19.5 wt% weight gain) were 188 kW/m 2 and 20.3 MJ/m 2 , with reductions of 70% and 15% as compared with those of untreated PU foam, respectively. Meanwhile, the smoke production of treated PU foam was suppressed after the construction of LaPP-based coating.
研究领域:
材料科学
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防火材料
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高分子化学
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产品关联
DOI
高影响因子
COMPOSITES PART B-ENGINEERING
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2022
·
IF 11.322
Chao Ma,Zhenghong Guo,Zhengping Fang,Juan Li
The development of methods for recycling of thermosetting resin is difficult due to their structure. To regulate the flame retardancy and chemical degradation behavior of epoxy (EP), a phenylphosphonate based EP monomer (DGEP) was prepared and cured using 4,4-diamino diphenylmethane (DDM). For comparison, bisphenol A EP (DGEBA/DDM) was also prepared. The modes of flame retardancy and chemical degradation have been investigated. The DGEP/DDM displays a UL-94 V0 rating while the DGEBA/DDM may not be classified in the UL-94 test. Moreover, DGEP/DDM is stable in most solvents and is degraded after 40 min in a solution of methanol/sodium hydroxide (NaOH)/water (H 2 O) at 50 °C, while DGEBA/DDM is stable under the same conditions. Degradation occurs by hydrolysis and alcoholics of phenylphosphonate in the main chain of EP under alkaline conditions. In addition, DGEP/DDM has a similar glass transition temperature and tensile properties as those for DGEBA/DDM. The introduction of phenylphosphonate into EP may represent a useful method for the preparation of flame retardant and recyclable EP.
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
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Yameng Wan,Haixia He,Renren Sun,Liyuan Li,Jiao Sha,Weiwei Guo,Gaoliang Jiang,Yu Li,Tao Li,Baozeng Ren
In this research work, solubility of pyrethroid insecticide phenylphosphonic acid (PPOA) in three binary solvents including methanol (MtOH) + ethyl acetate (EtAC), ethanol (EtOH) + EtAC at (278.15 to 323.15) K and 1,4-dioxane + EtAC at (288.15 to 323.15) K was investigated by laser monitoring method at 0.1 MPa. Solubility of PPOA increased with the increasing temperature while decreased with the increasing mass-fraction of EtAC. The solubility behavior was studied by molecular simulation. The solute-solvent interaction ( E inter ) suggested that solubility of PPOA increased with values of E inter increasing and there existed the strong interactions between PPOA and most selected binary solvents except 1,4-dioxane + EtAC. The radial distribution function (RDF) between two components of mixed solvent indicated that the tendency to aggregation of two components molecules increased with the increment of corresponding mole fraction of binary solvents. It also confirmed to some extent that the solute – solvent interaction energy would be weaken and the PPOA solubility in binary selected decreased. At the same time, it was found that the hydrogen bond existed in binary solvents namely “MtOH + EtAC and EtOH + EtAC”. So solubility of PPOA resulted from the integrated effect of solute – solvent and solvent – solvent interactions. Moreover, experimental solubility values were correlated by four multi-component activity coefficient models including Wilson, NRTL, Margules and UNIQUAC model. Four thermodynamic functions provided good correlations with solubility values. Furthermore, thermodynamic properties of mixing process were calculated by Wilson equation and corresponding solubility data. Mixing process was entropy-driven in selected solvents and exothermic in most binary solvents except EtAC and 1,4-dioxane ( w 1 = 0.2016) + EtAC.
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
危险品化学品经营许可证（带存储）