ANALYTICAL CHEMISTRY
·
2025
·
IF 6.7
Lerong Qi,Xiangzi Li,Yachen Ren,Tingxiang Yang,Yang Guan,Dong Hao Wang,Zhen Wang
Sebum fatty acids and squalene are major components of skin secretions and play a critical role in the pathogenesis of dermatological conditions through their compositional alterations. Human sebum fatty acids are uniquely diverse in their chain length, double bond positions, and chain branching; squalene is a rare component of skin secretions with six double bonds. We introduce a facile workflow for the analysis of sebum fatty acids and squalene for elucidating their contribution to the state of skin health or disease using advanced mass spectrometric methods for qualitative and quantitative analyses. Sebum from dermatologically healthy individuals was extracted, and covalent adduct chemical ionization (CACI), electron ionization (EI), and Paternò–Büchi (PB) tandem mass spectrometry (MS/MS) techniques were employed for the identification of fatty acids with varying methyl branch and/or carbon–carbon double bond positions. A method for the full structural characterization of squalene via CACI tandem mass spectrometry was also developed. In sebum, we report for the first time unusual straight-chain polyunsaturated fatty acid isomers (n18:2n-7, n18:2n-3, n20:2n-12, and n20:2n-7), a series of previously unreported branched-chain saturated fatty acids with C19–C26, and a novel branched-chain monounsaturated fatty acid i15:1n-9. A total of 64 fatty acids were identified, exceeding the previous reports. Our study established a comprehensive qualitative and quantitative workflow for the analysis of sebum fatty acids and squalene, with the potential to advance dermatological research and clinical diagnostics.
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高影响因子
FUEL
·
2025
·
IF 7.5
Bingfan Li,Xiaowen Qian,Jiang Han,Yong Han,Chao Yang,Tifeng Jiao
To overcome the limitations of inefficiency and high operational costs associated with conventional oil–water separation technologies, this study introduces a novel membrane material inspired by the natural adhesive properties of mussels, derived sustainably from discarded face masks. A straightforward, eco-friendly one-step modification method employing gallic acid (GA) and polyethyleneimine (PEI) was adopted to fabricate a superhydrophilic coating on polypropylene (PP) membranes. The modified membrane exhibited exceptional wettability, characterized by a water contact angle (WCA) of 0° and an underwater oil contact angle (UWOCA) of 162°, along with remarkable flux performance of up to 43,935.11 L·m −2 ·h −1 for oil–water mixtures and 1,328.6 L·m −2 ·h −1 for emulsions. Performance tests further demonstrated significant enhancements in hydrophilicity, separation efficiency, fouling resistance, and reusability under demanding operational conditions. Environmentally benign, mechanically stable, and simple to implement, this membrane technology represents a promising approach for both sustainable recycling of waste face masks and advancement in high-performance separation technologies.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yunchang Zhong,Hongqiang Li,Xuejun Lai,Hongtao Zhu,Weizhen Fang,Shangdong Huang,Xingrong Zeng
Due to the increasingly stringent environmental regulations and the great demand for sustainable materials, fluorine-free water- and oil-resistant coatings for paper have attracted considerable attention in the field of packaging and decoration. In this study, acrylated epoxidized soybean oil (AESO) and pentaerythritol tetrakis(mercaptoacetate) (PETMA) were used as reactants to form a crosslinked film on kraft paper through a UV-initiated thiol-ene click reaction, followed by the spraying of a mixed dispersion of silica (SiO 2 ) and AESO/PETMA solution, and a fluorine-free water- and oil-resistant composite coating on kraft paper was obtained. When the molar ratio of CC bonds of AESO to SH groups from PETMA was 1:1 and the content of SiO 2 was 20% of the mass of AESO, the water contact angle of the coated paper reached 141°, far higher than that of the uncoated paper at 56.5°. Meanwhile, compared with uncoated paper, the Cobb 60 value of the coated paper sharply decreased from 67.1 to 1.4 g m −2 , demonstrating excellent water resistance. In addition, the oil contact angle of the coated paper also attained 137°, and kit rating of 12/12. The coated paper also exhibited excellent barrier properties to hot castor oil.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Wenfeng Huang,Yufeng Wei,Xiaocong Liu,Ruonan Li,Qiuxiang Yin,Lihong Jia
The equilibrium solubility of quetiapine fumarate was determined in twelve individual solvents and one binary solvent mixture by the gravimetric method at atmospheric pressure over a temperature range of 283.15–323.15 K. The results showed that the solubility increases with increasing temperature in all selected solvents. The solubility order is tetrahydrofuran–water (mole fraction of tetrahydrofuran 0.8083) > tetrahydrofuran > n-propanol > dichloromethane > butanone > methyl isobutyl ketone > xylenes > ethyl formate > tert-butyl methyl ether > isopropyl acetate > toluene > hexane ≈ heptane. The modified Apelblat model, λh model, nonrandom two-liquid model, and van’t Hoff–Jouyban–Acree model were employed to correlate the experimental solubility. The four models provided satisfactory fits, as confirmed by the average relative deviation and the root-mean-square deviation. The modified Apelblat model showed the best performance among them. The accurate solubility data are essential for the design and optimization of the crystallization process of QF.
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高影响因子
FUEL
·
2025
·
IF 7.5
Xiaoning Zhang,Buning Chen,Jianwei Wang,Yusheng Zhou,Xueli Huang,He Huang
The high content of heteroatoms and trace metals makes it difficult to upgrade poor-quality oils (PQO). The co-pyrolysis or co-hydrogenation of coal tar (CT)/vacuum residue (VR) is a new approach for the efficient utilization of PQO. The products of CT/VR co-pyrolysis and co-hydrogenation were characterized by RV, TG-FTIR, and GC × GC-TOF. Co-pyrolysis reduces the reaction harshness by lowering the activation energy of pyrolysis. Co-pyrolysis changes the reaction paths of oxygen-containing free radicals by promoting the generation of oxygen-containing organic compounds and inhibiting coke generation by increasing the pyrolysis spillover of unsaturated hydrocarbons. Co-hydrogenation increased the gasoline and diesel yields while reducing coke production. The saturates, aromatics, resins, and asphaltenes of CT and VR experienced a significant increase in the gasoline and diesel fractions after hydrogenation. The gasoline and diesel content enhancement in the four-component hydrogenation products of CT increased with increasing polarity, whereas the opposite trend was observed for the four-component hydrogenation of VR. There was a clear synergistic effect between the aromatics of CT and VR in terms of hydrogenation saturation, while the synergistic effect of the aromatics was somewhat weaker. The saturates and resins had an inhibitory effect on each other.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Jinjian Hou,Wenjuan Wang,Zanli Fu,Yuting Hu,Zhongchi Wu,Xiaojin Wu,Jianan Hu,Haiming Yu,Gaobo Yu,Jiacheng Li
In recent years, heavy oil-solid separation has attracted quantities of attention, and ionic liquids (ILs) enhanced solvent extraction has been widely studied. However, the detailed mechanism of ILs effect onto the heavy oil recovery was unclear, especially the interaction role between ILs and heavy oil SARA. In order to solve these problems, this paper used the experiment and molecular dynamics simulation methods to explore the four ILs ([Bmmim][PF 6 ], [C 12 mim][Ac], [C 12 mim][BF 4 ], and [Emim][Ac]) effect on enhancing the solvent extraction for oil sands. The experimental results showed that the ILs could enhance the solvent extraction process, improve heavy oil recovery, reduce bitumen viscosity, decrease oil-sand interaction force, alter the sand particles wettability. The extraction efficiency of [Bmmim][PF 6 ] + toluene reached 93.9 %. Additionally, molecular dynamics (MD) simulations were conducted to analyze the interaction mechanisms between heavy oil SARA (saturates, aromatics, resins, asphaltenes) and solvents and ILs. The simulations results indicated that the saturates, aromatics, resins and asphaltenes have different interaction role with the different ILs under varieties of solvents, and the interaction role strength was related to the functional groups and heteroatom. In the end, the detailed mechanism of ILs enhancing solvent extraction for oil sands was put forward.
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高影响因子
LANGMUIR
·
2025
·
IF 3.9
Ruoxin Zhang,Hongsheng Lu,Lingyan Wei,Xingyu Lin,Ziteng Yang,Jie Qi,Zheng Zhang
Interfacial self-assembly offers a promising route to fabricate functional materials, yet achieving robust mechanical performance remains challenging. Here, the self-assembly of nonionic surfactant polyoxyethylene monoalkyl ether (AEO-9) at oil–water interfaces was systematically investigated to form a high-strength interfacial gel. During the self-assembly process, the mechanical strength of the interfacial gel progressively increased, reaching a maximum equilibrium value of 4200 Pa after 24 h. Furthermore, significant gradients in the composition, microstructure, and micromechanical properties of the interfacial gel along the sample height were revealed by fluorescence microscopy, small-angle X-ray scattering (SAXS), and atomic force microscopy (AFM). This unique interfacial self-assembly behavior was further studied via dynamic light scattering and molecular simulations. The solubility differences and polar–hydrophobic interactions are the key factors. Directional migration of AEO-9 from the oil phase (low solubility) to the aqueous phase (high solubility), driven by solubility differences, was found to establish a transient interfacial concentration gradient. This gradient facilitated interfacial enrichment of AEO-9, which was subsequently organized into gradient lamellar liquid crystals (LC) through compositional heterogeneity and polar–hydrophobic interactions. The gradient variations in micromechanical properties were correlated with the gradient structural packing. Moreover, the effects of AEO-9 concentration, brine, temperature, and oil type on the gel’s mechanical properties were examined, highlighting their roles in modulating the polar–hydrophobic balance. This study reveals the dual control of solubility-driven migration and interfacial interactions on gradient formation, establishing a framework for the design of high-performance interfacial materials.
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FIBERS AND POLYMERS
·
2025
·
IF 2.3
Pan Xianmiao,Wang Hongjie,Wang Jiani,Wang He,Shi Hu,Wang Shubo,Ruan Fangtao,Feng Quan
Thermoplastic polyurethane (TPU) electrospun membrane is an ideal substrate material, especially in waterproof breathable membranes due to its superior mechanical properties and flexibility. Herein, we fabricate a TPU-based composite membrane by decorating ground polyacrylonitrile (PAN)-derived carbon nanofibers (CNFs) through ultrasonication followed by a dip-coating of polydimethylsiloxane (PDMS). The decorated CNFs can build up roughness on the membrane, and the coated PDMS layer can protect the CNFs from detaching from the membrane and increase the mechanical properties of the composite membrane. The obtained TPU/CNFs/PDMS membrane displays excellent waterproof and breathable ability. Specifically, the air permeability of the composite membrane is 7.38 mm/s, and the moisture permeability amounted to 5610 g/m 2 /day. Besides, the TPU/CNFs/PDMS membrane exhibited an outstanding tensile strength of 19.407 MPa, elongating at a break of 155.76%. This novel TPU-based composite membrane exhibits great application potential in functional fabric, especially for personal protective fabrics.
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高影响因子
FUEL
·
2025
·
IF 7.5
Yuhang Yang,Jiahao Wang,Run Hong,Bingbing Qiu,Huaqiang Chu
As a potential e-fuel, polyoxymethylene dimethyl ether (PODEn) not only has the potential to reduce carbon dioxide, but its properties, similar to diesel, also determine its broad application prospects as a fuel additive. So as to study the effects of the unique long-chain structure and high oxygen content of PODEn on soot formation, n -heptane was employed as a diesel alternative fuel in this research. Methyl butyrate (MB), which is chosen as the comparative oxygenated fuel, has the same carbon chain length as PODE3. With the aim of comparing the effects of different oxygenated functional groups in long-chain oxygenated fuels and analyzing the advantages and disadvantages of PODE3 as a fuel additive, two lines of thought were taken. The blending ratio of long-chain oxygenated fuels and total oxygen content in the fuel mixture were fixed. In this work, the high-resolution transmission electron microscope was used to observe the nanostructure of soot. The impact of blending different long-chain oxygenated fuels on soot was analyzed. Compared with pure n- heptane flame, the mean particle diameters of flames from n -heptane blended with 15 vol% PODE3 and 15 vol% MB decreased by 4.07 and 3.55 nm, respectively. As the MB blending ratio increased, the mean soot particle diameter decreased by 6.82 nm compared with pure n- heptane flame. Raman spectroscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy were employed to analyze the physico-chemical properties of soot samples. It was found that both PODE3 and MB effectively inhibited the soot formation and reduced the soot graphitization degree in flames. The effect of PODE3 on soot inhibition was more obvious at the same blending ratio. However, when the oxygen content in the fuel mixture was the same, the advantage of PODE3 was no longer maintained.
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高影响因子
Polymers
·
2025
·Vol. 17
·期 23
·3230
·
IF 4.9
Jialong Jiang,Yi Zheng,Yuan Ji,Hong Wu,Shaoyun Guo
To meet the requirement of thermal management of modern electronic devices, polymer composites with high thermal conductivity (TC) and dielectric performance are nowadays in urgent demand. Herein, a highly ordered continuous network of boron nitride nano-sheet (BNNS) was constructed in cyclic olefin polymer (COP) films via the forced flow processing in the rubbery state (FFRS), melt-spinning, fiber-alignment, and hot-pressing procedures. The composites exhibited superior TC, low dielectric permittivity, and low dielectric loss simultaneously. The in-plane TC of the composites reached 3.92 W/(mK) when the content of BNNS was at 27 weight percentage (27 wt%), since the procedures improved the face-to-face contact between the BNNS (which was exfoliated, dispersed, and in-plane oriented during FFRS), enhancing the continuity of the BNNS thermally conductive network. Both the TC and the experimental results indicated the outstanding heat dissipation performance of the composites. Meanwhile, the dielectric permittivity and dielectric loss of the 27 wt% BNNS composites were 2.56 and 0.00085 at 10 GHz, respectively, lower than that of the COP-POE matrix. Moreover, the mechanical properties, water vapor permeability, and coefficient of thermal expansion of the composites were excellent. The composites with such highly ordered continuous networks are very promising in high-performance electronic devices.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Liang He,Xiaoming Shao,Yang Chen,Wei Li,Linqian Yin,Wencai Wang
Electromagnetic interference (EMI) shielding materials with excellent shielding performance, salt spray resistance, and light weight are crucial for electronic devices operating in harsh environments. Here, anti-salt spray and conductive foams with high shielding effectiveness were successfully developed. Firstly, Ag conductive networks were constructed on the surface of melamine foams via polydopamine-assisted electroless plating. Subsequently, reduced graphene oxide (rGO) with dual functionality was introduced through dipping method. The rGO films not only enhanced the shielding effectiveness by creating multiple interfaces and conductive pathways through sealing the open-cell structures (70 dB → 92 dB), but also improved salt spray resistance by forming a protective layer over the Ag surface. Finally, an ultra-thin polydimethylsiloxane (PDMS) coating was applied to further enhance salt spray resistance through superhydrophobic surfaces (contact angle ≈ 153°), resulting from its inherent low surface energy and the surface roughness generated by the aggregated Ag particles. Moreover, PDMS increased the mechanical durability of the composite foams by encapsulating the conductive network and matrix like “glue”. The composite foams exhibited excellent EMI shielding effectiveness (90 dB) and maintained performance stability after salt spray corrosion and compression damage. This work presented a method to develop high-shielding-efficiency foams for harsh environment applications.
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JOURNAL OF HAZARDOUS MATERIALS
·
2025
·
IF 11.3
Shaoyang Liu,Jie Qi,Keting Yan,Jingru Liu,Zhenyu Hao,Lihua Sui,Yuanqiang Zhu,Hongsheng Lu
One of the challenges of CO 2 switchable hydrophilic solvents in the sustainable recovery of total petroleum hydrocarbons (TPH) from contaminated sands was the long recovery cycle. Herein, a CO 2 /NaOH switchable hydrophilic solvent, thymol was developed while specific reaction modes were investigated by quantum chemical calculations. The hydrophilic transition of thymol was triggered by NaOH solution at 25 ℃ and 1 atm, followed by regeneration through CO 2 bubbling. The time required for regeneration of thymol was reduced by 81.20 % compared to the conventional CO 2 switchable hydrophilic solvent N, N-dimethylcyclohexylamine, because of the high CO 2 reactivity of thymol revealed by the analysis of LUMO-HOMO and electrostatic potential. Thus, the concept of sustainable treatment of contaminated sands using thymol was proposed, achieving a TPH recovery of 87.63 %. We found that the solution of hydrophilic deep eutectic solvents (DESs/H 2 O) attributes to enhance the TPH recovery of thymol. Such synergy mechanism of DESs/H 2 O and thymol was revealed by molecular dynamics simulations. The optimal TPH recovery efficiency was 94.52 % after optimization by single variable experiment, Plackett-Burman design, the path of steepest ascent method and response surface methodology. The reusability of thymol and DES/H 2 O achieved a TPH recovery of 91.26 % after three cycles.
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