LANGMUIR
·
2022
·
IF 4.331
Changsheng Sun,Shujing Zhou,Jinjing Li,Chenze Qi,Yong Gao
Nonaqueous Pickering emulsions exhibit promising applications in many industrial areas but have been relatively less studied in the past. In this study, n-hexane-in-DMF nonaqueous Pickering emulsions stabilized by core cross-linked copolymer worms with mixed shells are demonstrated for the first time. Core cross-linked copolymer worms with mixed shells were prepared by seeded reversible addition–fragmentation chain transfer (RAFT) quasi-solution polymerization. Specifically, polystyrene-poly(4-vinylpyridine) (PS-P4VP) diblock copolymer worms were first prepared via RAFT-mediated dispersion polymerization in toluene under the given conditions using PS as both the macro-CTA and the stabilizer block. After the chemical cross-linking of P4VP cores, PS-P4VP diblock copolymer worms were chain-extended with LMA in DMF/toluene (1:9, weight ratio) mixed solvents, producing core cross-linked PS-P4VP-PLMA worms with PS/PLMA mixed shells. The as-prepared core cross-linked PS-P4VP-PLMA worms with mixed PS/PLMA shells were further utilized as Pickering emulsifiers for the generation of nonaqueous n-hexane-in-DMF Pickering emulsions. The emulsifying performances of mixed-shell copolymer worms were compared with those of their spherical and linear analogues with entirely identical chemical compositions as well as PS-P4VP diblock copolymer worm precursors, respectively.
研究领域:
材料科学
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化学工程
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高分子化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MASS SPECTROMETRY
·
2019
·Vol. 54
·期 4
·351-358
·
IF 2.267
Bing Zhao,Xiaoyu Zhuang,Xinyu Bian,Zifeng Pi,Shu Liu,Zhiqiang Liu,Fengrui Song
Considering that aprotic solvents are often used as cosolvents in investigating the interactions between small molecules and proteins, we assessed the effects of five aprotic solvents represented by dimethylformamide (DMF) on the structure stabilities of metal-free SOD1 (apo-SOD1) by native electrospray ionization–ion mobility–mass spectrometry (ESI-IM-MS). These aprotic solvents include DMF, 1,3-dimethyl-2-imidazolidinone (DMI), dimethyl sulfoxide (DMSO), acetonitrile (ACN), and tetrahydrofuran (THF). Results indicated that DMI, DMSO, and DMF at low percentage concentration could reduce the average charge and the dimer dissociation of apo-SOD1. By contrast, ACN and THF at low concentration have no similar effect. DMF was selected as a representative solvent to further investigate the detailed effects on the structure stability of apo-SOD1 by using collision-induced dissociation and unfolding. The results reveal that the addition of minimal DMF to an aqueous protein solution can protect against the unfolding and dissociation of dimer, even under destabilizing conditions (such as low pH or high cone voltage). When the different percentage concentrations of DMF were added, the average collision cross section of apo-SOD1 showed that apo-SOD1 became compacted when the DMF concentration increased from 0% to 1% and eventually started extending when increased from 1% to 20%. The results indicated that DMF has similar effects to DMSO in native mass spectrometry (MS) and it can also be used as a cosolvent besides DMSO in investigating the stabilities of proteins and the interactions between small molecules and proteins.
研究领域:
生物化学
·
蛋白质科学
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分析化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2025
·
IF 2.6
Mei Tingting,Lin Zixin,Zheng Shuyi,Zhang Yinghe,Liu Jun
Gallium electrodeposition is currently limited by hydrogen evolution reactions (HER) in traditional electrolyte, which severely degrade current efficiency and deposit quality. This study investigates the electrodeposition of gallium (Ga) in a non-aqueous dimethylformamide (DMF) system containing 0.5 M GaCl 3 to eradicate HER and enable high-quality Ga deposition. Gallium deposits on different substrates exhibit distinct morphologies, among which the gallium particles deposited on copper substrates possess both spherical and strip-like structures. Through the analysis of the electrodeposition behavior and nucleation process of gallium on copper foil, an irreversible Ga deposition process with a cathodic charge transfer coefficient (α) of 0.0528 and a diffusion coefficient of 6.964 × 10⁻ 6 cm²/s, is confirmed during the electrochemical behavior and nucleation. The Ga nucleation shifts from an instantaneous model at -1.1 V to a progressive model at more negative potentials, reflecting potential-dependent growth dynamics. The deposition efficiency of gallium has been calculated to over 80% at low current density through the gravimetric method. These findings establish DMF as a promising solvent for efficient Ga electrodeposition, offering insights for applications in flexible electronics and energy storage technologies. Graphical
研究领域:
电化学
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材料科学
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储能技术
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纳米材料
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柔性电子学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Lijiao Ma,Yudong Ding,Xun Zhu,Hong Wang,Min Cheng,Qiang Liao
To address the limitations of amine-based aqueous solutions, nonaqueous mixtures of monoethanolamine (MEA) and N,N-dimethylformamide (DMF) were developed for CO 2 capture. Key factors affecting absorption were systematically investigated, including MEA concentration (10–50 wt%), temperature (30–60 °C), pressure (100–220 kPa) and water content (0–70 wt%). At 30 °C and 140 kPa, the nonaqueous absorbent exhibited a comparable CO 2 absorption capacity to its aqueous solution, while achieving a fivefold increase in absorption rate. Thermogravimetric (TG) analysis revealed that the thermal decomposition temperature of 30 wt%MEA-DMF was 83 °C, which was higher than that of the aqueous solution (70 °C), indicating improved thermal stability. The reaction mechanism was elucidated through Fourier transform infrared spectroscopy (FTIR), nuclear magnetic resonance (NMR), pH and conductivity measurements, density functional theory calculations and molecular dynamics simulations. The solvent interactions in water-lean systems were found to impair absorption performance. CO 2 could react with MEA in nonaqueous environments to form carbamic acid, carbamate, and protonated MEA. The DMF component significantly enhanced the absorption rate by facilitating deprotonation. Overall, MEA-DMF solutions had superior CO 2 absorption capacity, faster reaction rate and greater thermal stability, without undergoing phase change. Additionally, the low evaporability, specific heat capacity, and evaporation enthalpy of DMF suggest reduced energy requirements for solvent regeneration. These findings support the potential of MEA-DMF systems as viable alternatives to conventional aqueous amine solutions for CO₂ capture.
研究领域:
化学工程
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2021
·
IF 2.694
Xiaoyu Wang,Jiale Wang,Lijun Ji,Bin Wu,Kui Chen,Yanyang Wu
Wastewater containing DMF (N,N-dimethylformamide) and salt is generated in production of many chemicals and medicines. The composition of phase equilibrium should be known primarily for the recovery of DMF from salt-containing wastewater by solvent extraction. In this study, liquid–liquid equilibrium (LLE) and solubility data of water + DMF + chloroform in the presence of NaCl with various concentrations of 0, 2.5, 5.0, 7.5, 10.0, and 13.3 wt % and Na2SO4 with concentrations of 1.5 and 2.5 wt % were determined at T = 298.2 K and atmospheric pressure. Besides, the salt effect on the LLE data was investigated. Compared with the salt-free system, the salt led to an enhancement in the maximum DMF distribution coefficient by 13.4–102.6% for 2.5–13.3 wt % NaCl and 16.2–31.7% for 1.5–2.5 wt % Na2SO4, respectively. Since the distribution coefficient of water increased concurrently, the separation factor barely changed and the two-phase region expanded outward slightly. At the same salt mass fraction, the order of salting-out effect strength on extraction was Na2SO4 > NaCl, which was in good agreement with the Hofmeister series. The reliability of the experimental values was verified through the Eisen–Joffe equation. The NRTL thermodynamic model was applied to correlate the experimental data with a root-mean-square deviation less than 0.0062. The coherent consistency of the model parameters for the salt-free system was checked by topological analysis based on the Gibbs tangent plane test.
研究领域:
化学工程
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环境科学
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DOI
高影响因子
FUEL
·
2017
·
IF 4.601
Yichun Dong,Chengna Dai,Zhigang Lei
Methylal is used as an important synthetic fuel blended with diesel oil to reduce the particulate emissions of toxic gas pollutants without affecting the energy density. The mixed entrainers (dimethylformamide (DMF) + ionic liquid (IL)) are proposed to replace conventional DMF for the separation of methylal and methanol by extractive distillation. [EMIM] + [Ac] − might be the most promising entrainer screened by COSMO-RS model considering relative volatility and solvent capacity together. Vapor–liquid equilibrium (VLE) experiments demonstrated that the relative volatility of methylal to methanol is obviously improved after the addition of [EMIM] + [Ac] − into DMF. Moreover, the UNIFAC-Lei model was extended to the methylal-methanol-DMF-IL system, and the corresponding interaction parameters were obtained and input into the equilibrium (EQ) stage model established in this work. Based on the thermodynamic study, process simulation was developed. It was found that the overall heat duty of reboilers decreased 9.25% using the proposed mixed entrainers when compared to pure DMF. In addition, the COSMO-RS model and DFT calculation provide some theoretical insights into the separation mechanism.
研究领域:
化学工程
·
分离技术
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产品关联
DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2021
·
IF 3.171
Yipeng Zheng,Zhennan Cao,Zheng Zhou,Gaodong Yang,Zhibing Zhang
A series of SO 3 -functional Brønsted acidic ionic liquids (SBAILs) were prepared to catalyze the N -formylation of aniline with DMF . The reaction conditions such as ionic liquid type, reaction temperature, catalyst loading and molar ratio of reactants were investigated. To the best of our knowledge, kinetic model for the N -formylation of aniline with DMF using SBAIL was firstly built and simulated. The studies on the reaction order of the reaction were evaluated by initial concentration method, and the kinetic parameters such as reaction rate constant and activation energy were proposed and used to explain the catalytic activities of the SBAILs catalysts. Accordingly, the recycling experiments showed that the SBAIL [Bsmim][HSO 4 ] can be easily recovered and reused with stable activity. Further, the temperature-controlled study emphasized that the ionic liquid was easy to be separated and environmentally friendly.
研究领域:
化学工程
·
催化化学
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Binhang Wang,Libo Sun,Tong Wang,Yujie Cao,Xiang Li,Wenhao Xu,Jie Zhang,Yun Tang
Ordered mesoporous Metal-Organic Frameworks ( meso MOFs), integrating mesopores and micropores, address mass transfer limitations characteristic of microporous materials, thus broadening their application spectrum. However, the synthesis of meso MOFs has been predominantly achievable in aqueous media, rather than in organic solvents, which are more conducive to the growth and stabilization of MOFs. This is primarily attributed to the challenge in forming stable and uniform micelles from block copolymers within organic systems. In this work, meso MOFs are synthesized within N,N-dimethylformamide (DMF) media for the first time, via a micellar microphase separation method facilitating by introducing trace water into the organic solvent DMF. These meso MOFs, featuring non-exposed spherical mesopores and inherent microporosity, demonstrate significantly enhanced performance in the accumulation of reactants, and such characteristics render these materials ideal nanoreactors, endowing them with superior adsorption and degradation capabilities. The adsorptive and degradation removal of tetracycline (TC) by m MIL-101 reached 93.7 %, with its efficiency in both adsorption and degradation of TC being significantly higher than that of traditional MIL-101. This synthetic approach expands the scope of meso MOFs preparation in organic solvents, providing insights for designing a new generation of meso MOFs with diverse compositions and structures, promising applications across various fields and advancing MOF-based technologies.
研究领域:
材料科学
·
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
·
2019
·
IF 3.073
Mei-Ling Liu,Jue Wang,Jia-Lin Guo,Tian-Dan Lu,Xue-Li Cao,Shi-Peng Sun
Purification and recovery of polar organic solvents such as dimethylformamide (DMF) with high chemical separation speed and low energy cost nanofiltration membranes has been widely investigated, while it is still a difficult challenge that high permeability of solvents and rejection of solutes are achieved simultaneously. In this study, a novel organic solvent nanofiltration (OSN) membranes was obtained via coating a thin selective graphene oxide (GO) layer on top of the polyimide porous substrate (PI) which was cross-linked to improve the stability in polar solvents. The resultant GO/cross-linked PI (GO/CLPI) composite membranes feature remarkable sieving capability of >94% for RBss molecules (1018 Da), accompanying high pure solvent permeability of 11.1 L h −1 m −2 bar −1 , 4.9 L h −1 m −2 bar −1 and 1.0 L h −1 m −2 bar −1 for water, IPA and DMF, respectively. Different from conventional method of characterization, low field nuclear magnetic resonance technology (LF-NMR) was utilized to confirm that the GO/CLPI membrane shows a higher adsorption capacity for IPA than DMF. This newly technique can be effectively utilized to evaluate the affinity between organic solvents and the surface of membranes.
研究领域:
材料科学
·
化学工程
·
膜技术
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产品关联
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2022
·
IF 4.831
Qi Liu,Yatong Liu,Zhiyong Xing,Yuntong Huang,Li Ling,Xinglin Mo
In this study, a novel dual-function probe BMP based on benzothiazole was easily synthesized and characterized through common optical technique. In the system consisting of DMF/H 2 O (v/v, 2/3), probe BMP showed azure and blue-green to Al 3+ and Ga 3+ , respectively. Besides, the binding ratios of BMP to Al 3+ and Ga 3+ were determined as 1:1, which confirmed by Job’s plot. Furthermore, for Al 3+ and Ga 3+ , the limit of detection (LOD) was determined to be 1.51 × 10 -6 M and 4.28 × 10 -6 M, respectively. Moreover, it was worth noting that BMP showed good performances in paper colorimetry, cell phone colorimetric identification and cell imaging.
研究领域:
分析化学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2022
·
IF 4.326
Li Fang,Wang Sun,Wenshuo Hou,Yuqiong Mao,Zhenhua Wang,Kening Sun
Solid-state polymer electrolytes (SPEs) complexing a plasticizer is a valid strategy to improve the poor ionic conductivity of SPEs at ambient temperature. In this study, a quasi-SPE based on a polyurethane matrix (QSPE-PU) is constructed by regulating the contents of bis(trifluoromethanesulfonyl) imide (LiTFSI) salt and N,N-dimethylformamide (DMF) and shows high performance in ambient-temperature rechargeable lithium batteries. Highly concentrated LiTFSI is designed to anchor DMF, decreasing the free solvent molecules in the QSPE to improve the stability with lithium metal. Meanwhile, DMF can fully dissociate the highly concentrated LiTFSI, providing more carriers. The prepared QSPE-PU40 shows a high ionic conductivity of 1.12 × 10–4 S cm–1 at ambient temperature since DMF not only provides more carriers but also enhances the movement of the polymer segments and lowers the energy barrier of lithium ion migration. Density functional theory calculations further prove that DMF facilitates the conduction of lithium ions in the QSPE system. QSPE-PU40 shows good compatibility with the lithium metal electrode by forming a stable solid electrolyte interphase during lithium plating/stripping processes. The lithium ferrophosphate (LFP)/QSPE-PU40/Li battery exhibits a high specific capacity of 138 mA h g–1 with remarkable cycling stability at 0.5 C and 30 °C (94% capacity retention after 800 cycles). More impressively, the pouch cell based on QSPE-PU40 delivers good flexibility and high safety. Such a QSPE is expected to provide an effective strategy where SPEs are applied in solid-state lithium batteries at ambient temperature and even flexible batteries for next-generation wearable devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Enyang Liu,Lei Lei,Bingxin Xie,Shiqing Xu
Cesium lead halide (CsPbX 3 X = I, Br, Cl) perovskites have potential applications in the fields of X-ray fluorescence imaging, solar cells, light-emitting diodes (LEDs) and photocatalysis due to their excellent optical and electrical properties. In this work, we propose a novel method to tune the emission color of CsPbBr 3 by polar solvent post-treatment. The blue emission color of the two-dimensional (2D) CsPbBr 3 nanoplatelets (NPLs) prepared at room temperature is evidently changed to green under UV excitation via DMF post-treatment. We verify the DMF is used to decompose these NPLs into 0D quantum dots followed by the color variation. We further reveals the polarity of the employed solvent is the main parameter in the decomposition processes. This novel route might be suitable for other 2D perovskites and benefit the application of these colorful products in LEDs and information storage fields.
研究领域:
材料科学
·
光电子学
·
纳米技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）