EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Yunhang Zhu,Yang Ke,Feiyan Lu,Hongna Jiang,Qingting Liu,Xudong Fu,Rong Zhang,Shengfei Hu,Gang Xiao,Feng Zhao,Xiao Li,Jun Yang
High-temperature proton exchange membranes (HT-PEMs) suffer from an unavoidable trade-off between proton conductivity and mechanical strength under wide-temperature and anhydrous environments. Herein, copolymerized DA-PBI/SPEEK composite membranes are fabricated via hydrogen-bond-driven interphase engineering. The sulfonic acid groups of SPEEK form intense acid-base pairs with imidazole and amino sites on DA-PBI, the synergistic effects of flexible chain segments and intermolecular hydrogen bonding significantly enhance polymer miscibility and construct a robust acid-base interaction network. Quantum chemical calculations and charge density difference (CDD) analysis confirm that the nitrogen active sites of DA-PBI anchor phosphoric acid via electronic rearrangement, which remarkably lowers the energy barrier for proton migration. The optimal membrane achieves a tensile strength of 130 MPa (3.25 times that of pristine SPEEK) and a peak power density of 0.536 W cm −2 (1.85 times that of pristine SPEEK) at 160 °C. This multi-scale strategy combining molecular chain tailoring, interfacial modulation, and electronic structure optimization resolves the conductivity-mechanical property dilemma of PBI-based membranes, offering a promising route to advanced anhydrous HT-PEMs.
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高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2025
·Vol. 47
·期 7
·1-13
·
IF 3.8
Shi Yanfeng,Han Xinle,Wu Lixingzi,Fu Ling,Xue Weina,Jing Xuli,Xu Jing,Zhang Zhibin,Ding Botao
Hexafluoropropylene oxide dimer acid (HFPO-DA, tradename Gen-X) is used as a substitute to perfluorooctanoic acid (PFOA). Its widespread presence in the environment and potential health risks on humans. Nevertheless, the research on transport of HFPO-DA in saturated porous media remains limited. This study investigates the effects of hydrochemical conditions on the transport behavior of HFPO-DA and PFOA in quartz sand and limestone porous media, such as ionic type (Na + , Ca 2+ ), ionic strength (1 mM, 10 mM, 50 mM) and initial solution pH (pH = 4, 7, 10). Findings indicate that both HFPO-DA and PFOA have high mobility in saturated media. The transport of HFPO-DA through quartz sand and limestone porous media is not notably influenced by different ionic types and strengths, with recoveries all over 98.94% and R f all below 1.02. Similarly, PFOA showed high mobility under different ionic conditions, with recoveries exceeding 101.68% and Rf less than 1.02.The influence of initial pH on the transport of HFPO-DA showed that HFPO-DA is pH-sensitive in quartz sand, with retention enhanced and significant trailing of the BTC at pH = 4; however, the pH-buffering capacity of limestone media reduced the impact of pH on HFPO-DA transportation. Compared with PFOA, HFPO-DA transported faster at pH = 4 with an R f value of 0.97, lower than that of PFOA at 1.21, due to its smaller molecular weight and shorter carbon chain. Overall, the research reveals the potent mobility of HFPO-DA and PFOA in the environment, highlighting their groundwater pollution potential and environmental risks.
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PubMed
高影响因子
Foods
·
2025
·Vol. 14
·期 19
·3381
·
IF 5.1
Jiaqi Liu,Hao Duan,Li Wang,Rui Qin,Jiao Liu,Hong Liu,Shuyuan Bao,Wenjie Yan
This study aimed to systematically characterize the volatile organic compound (VOC) profiles of safflower (Carthamus tinctoriusL.) from eight major production regions, providing a scientific basis for quality evaluation and geographical traceability. VOC profiling was conducted using gas chromatography–ion mobility spectrometry (GC–IMS), and regional differences were assessed through multivariate statistical analyses, including Principal Component Analysis (PCA), Orthogonal Partial Least Squares Discriminant Analysis (OPLS–DA), Euclidean distance, and hierarchical clustering. Key differential compounds were identified by variable importance in projection (VIP) and relative odor activity value (ROAV) analyses, with aldehydes and esters emerging as the primary contributors to the discrimination of samples across regions. VOC fingerprints of safflower were further established, and a combined VIP–ROAV strategy was proposed for the screening of characteristic compounds. These findings provide a reliable reference for safflower quality control and offer practical guidance for its geographical authentication in the food industry.
研究领域:
植物化学
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代谢组学
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食品科学
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分析化学
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天然产物化学
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质量控制
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地理标志产品
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高影响因子
SURFACE REVIEW AND LETTERS
·
2017
·
IF 0.491
J. JIANG,L. ZHU,W. QIAN,H. CHEN,C. FENG,S. HAN,H. LIN,F. Y. YE
Glassy carbon electrodes (GCE) were modified by carboxylated graphene oxide/lanthanum with various concentrations of hexadecyl trimethyl ammonium bromide (CTAB), and the treated electrodes, called CTAB/GO-COOLa/GCE, were prepared for the detection of uric acid (UA) and dopamine (DA) by using the differential pulse voltammetry (DPV) and the cyclic voltammetry (CV). The results show that the modified electrode’s electrocatalytic activity could be affected by several factors in the examination, they are the pH value of the system, the main content of CTAB, various concentrations and rates of scan. With a combination of carboxylated graphene oxide/lanthanum and CTAB, the resulted CTAB/GO-COOLa/GCE sensors showed preeminent selectivity and obvious catalytic property toward the electro-oxidation of UA and DA. In optimized conditions, the response of the CTAB/GO-COOLa/GCE electrode for DA was linear in the region of 0.03–500.0 μ M with detection limits of 0.036 μ M (S/N = 3 ) . Two linear response ranges for the determination UA were obtained from ranges of 1 to 200 μ M and 200 to 1300 μ M with a detection limit of 0.42 μ M (S/N = 3 ) . Moreover, the refined electrode was used in the inspection of DA and UA in real samples of serum and urine successfully, displaying its potential application of real samples involved in electroanalysis.
研究领域:
生物化学
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分析化学
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高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2021
·Vol. 32
·期 11
·4223-4232
·
IF 3.665
Yubin Li,Zhijian Yang,Xu Zhao,Jianhu Zhang,Ling Ding,Liping Pan,Congmei Lin,Xue Zheng
A novel thermally mendable polyurethane binder for energetic composites was designed and prepared via the Diels-Alder (DA) cycloaddition reaction between a furan functionalized polycaprolactone (PCL) prepolymer and a bismaleimide compound. The structures and properties of synthesized PCL-DA-PU were fully characterized via Proton Nuclear Magnetic Resonance ( 1 H-NMR) and Fourier Transform Infrared spectroscopy (FT-IR), Gel Permeation Chromatography (GPC), Thermogravimetric Analysis (TGA), and Differential Scanning Calorimetry (DSC) measurements. As-prepared material showed good self-healing ability of scratches by virtue of combining the shape recovery effect of PCL segments favoring scratch closure with the re-crosslinking of the cleaved DA bonds, which was evidenced by optical microscopy and tensile analysis. A scratch healing efficiency determined by tensile tests of about 89% was achieved. Moreover, with the contribution of DA bonds in PCL-DA-PU binder, the microcracks and other damages in the TATB based energetic composites were almost mended and the mechanical strength can recovery above 78%.
研究领域:
材料科学
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化学工程
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2020
·
IF 3.807
Taotao Fan,Li Chen,Shunguo Qiu,Chanyuan Yang,Lihua Hu,Xiong Peng,Jianwei Zhang,Zongcheng Yan
A hybrid nanocomposite of hierarchical porous zeolitic imidazolate framework-8 / three-dimensional carbon nanotubes (HP-ZIF-8/3DCNTs) has been successfully fabricated by constructing micelle by sodium dodecyl sulfate (SDS) and deep eutectic solvent (DES) aqueous solution to grow HP-ZIF-8 in situ on the 3DCNTs template. The electrochemical performance for detecting dopamine (DA) is greatly improved owing to the synergism of highly conductive CNTs and hierarchical porous ZIF-8. At the same time, the electrochemical reaction of DA on HP-ZIF-8/3DCNTs/GCE is an adsorption control process, and density function theory (DFT) calculation was performed to analysis the charge distribution and interaction force of DA and dopaminophenone in the material, forming a molecular complex with adsorption energy of −19.11 and − 25.21 kJ/mol −1 . In addition, the response current is linear when the DA content is 1.0 × 10 −7 to 1.0 × 10 −4 M, the LOD is 2.7 × 10 −8 M at S/N = 3. The electrode material has excellent selectivity, sterling reproducibility of 2.21% and satisfactory repeatability with a RSD of 1.96%, and splendid long-term stability with peak current maintained 96.03% of the initial value after 14 days. The results indicate that HP-ZIF-8/3DCNTs composite has broad application prospects in the field of electrochemical sensing, and its modification methods and theoretical concepts can potentially be applied to the research of other sensors.
研究领域:
材料科学
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电化学传感
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理论计算
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高影响因子
ANALYST
·
2017
·Vol. 142
·期 24
·4852-4861
·
IF 3.885
Jin Wang,Hui Xu,Shumin Li,Bo Yan,Yuting Shi,Caiqin Wang,Yukou Du
Plasmonic photocatalyst has attracted significant attention due to its valuable theoretical study and promising practical applications in solar cells, functional composites, and sensors. Herein, an interesting RGO–C3N4-supported AuAg core–Au shell (AuAg@Au) nanocomposite has been reported. Due to the surface plasmon resonance (SPR) of AuAg@Au and the accelarated electron transfer and separation of charge carriers induced by the fascinating RGO–C3N4 substrate, the newly-generated AuAg@Au/RGO–C3N4 nanomaterials show a strong photo-electrochemical response under visible-light irradiation. The AuAg@Au/RGO–C3N4 photocatalyst demonstrated an excellent photo-electrochemical performance with a broad concentration linear range of 0.064–780.904 μM and a low detection limit of 0.022 μM, high stability, and good selectivity when applied in the determination of dopamine (DA) under visible-light irradiation.
研究领域:
材料科学
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分析化学
·
生物医学工程
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PubMed
高影响因子
Foods
·
2025
·Vol. 14
·期 11
·1966
·
IF 5.1
Yu Zhao,Rui Yang,Wei Wang,Tongle Sun,Xinyao Han,Mingxun Ai,Shihao Huang
The fermentation of prune juice significantly enhances its nutritional profile, antioxidant capacity, and flavor characteristics. In this study,Non-Saccharomyces cerevisiaeandLactiplantibacillus plantarumwere used to co-ferment prune juice to systematically investigate the dynamic changes in physicochemical properties and antioxidant activity during fermentation. The evolution of volatile compounds across fermentation stages was analyzed using gas chromatography–ion mobility spectroscopy (GC-IMS) combined with chemometric methods, including principal component analysis (PCA) and orthogonal partial least squares discriminant analysis (OPLS-DA). The results showed that after fermentation, the total acidity (TA), total phenolic content (TPC), and total flavonoid content (TFC) increased by 37.35%, 20.28%, and 28.95%, respectively. Meanwhile, the pH, total soluble solids (TSS), and reducing sugars (RS) decreased by 16.87%, 23.36%, and 39.94%, respectively. Additionally, the DPPH radical scavenging capacity and ABTS radical scavenging capacity improved by 76.16% and 57.25% during fermentation process. A total of 37 volatile compounds were identified across the four fermentation stages of prune juice (PJ). These compounds included 14 esters, 8 alcohols, 7 aldehydes, 4 terpenoids, 3 ketones, and 1 amine. Considerable quantities of organic acids and free amino acids were detected in samples from all fermentation phases. Among these, lactic acid, citric acid, and D-glucuronic acid exhibited significant increases in their concentration (p< 0.05). In the free amino acid profile of fermented prune juice (FPJ), asparagine was the most abundant component, followed by glutamine and proline.
研究领域:
食品科学
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微生物学
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生物化学
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分析化学
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高影响因子
Applied Sciences-Basel
·
2019
·Vol. 9
·期 24
·5336
·
IF 2.217
Qi XIA,Lei-ming YUAN,Xiaojing CHEN,Liuwei MENG,Guangzao HUANG
Featured ApplicationThe quality of methanol gasoline is important to internal combustion engines. Infrared spectroscopy technology shows its feasibility to qualitatively and quantitatively measure the quality of gasoline. Combined with the chemometrics, this technology can be used to determinate the adulteration category or fineness, providing the qualified gasoline for the market. Spectra analytical technology is a promising method in applying in the gasoline industry and speeding up the industrial application.AbstractMethanol gasoline blends are a more economical, and environmentally friendly fuels than gasoline alone, and are widely used in the transportation industry. The content of methanol in methanol gasoline plays an important role in ensuring the quality of gasoline. In some solutions, due to the shortage of energy and illegal profits, the problem of gasoline adulteration and its fineness, has received more and more attention, which would seriously affect the operating condition and service life of internal combustion engines. Therefore, it is very important to identify the correct level of gasoline. However, the traditional detection method is complex and time-consuming. To this end, the feasibility of using attenuated total reflectance Fourier transform infrared (ATR-FTIR) methods coupled with chemometrics methods were investigated to quantitatively and qualitatively analyze methanol gasoline. The qualitative analysis result of partial least squares discriminant analysis (PLS-DA) obtained 100% and 98.66% accuracy in the calibration set and the prediction set, respectively. As for quantitative analysis; two regression algorithms of partial least squares regression (PLSR) and the least square support vector machine (LS-SVM), as well as two variables selection methods of the successive projections algorithm (UVE) competitive adaptive reweighted sampling (CARS) and uninformative variable elimination (UVE) were combined to establish the quantitative model. By comparing the performance of the optimal models; the UVE-PLSR model performed best with a residual predictive deviation (RPD) value of 6.420. The qualitative and quantitative analysis results demonstrate the feasibility of using ATR-FTIR spectra to detect the methanol in methanol gasoline. It is believed that the promising IR spectra will be widely used in gasoline energy quality control in the further.Keywords:methanol gasoline;infrared spectroscopy;partial least square discriminant analysis (PLS-DA);multivariate regression;variable selection
研究领域:
化学计量学
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能源科学
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高影响因子
Frontiers in Chemistry
·
2019
·
IF 3.782
Hu Xiaohong,Gao Ziyu,Tan Huaping,Wang Huiming,Mao Xincheng,Pang Juan
Hydrogels with multifunctional properties attracted intensively attention in the field of tissue engineering because of their excellent performance. Also, object-oriented design had been supposed to an effective and efficient method for material design as cell scaffold in the field of tissue engineering. Therefore, a scaffold-oriented injectable composite hydrogel was constructed by two components. One was pH-sensitive bifunctional nanoparticles for growth factor delivery to improve biofunctionability of hydrogel scaffold. The other was Diels-alder click crosslinked hyaluronic acid hydrogel as matrix. pH dependent release behavior of nanoparticle component was confirmed by results. And, its bioactivity was verified by in vitro cell culture evaluation. In consideration of high-efficiency and effectiveness, low toxicity, controllability and reversibility, dynamic covalent and reversible Diels-alder click chemistry was used to design a HA hydrogel with two kinds of crosslinking points. The properties of hydrogel like gelation time and swelling ratio were influenced by pH value and polymer concentration. Composite hydrogel was formed by in situ polymerization, which exhibited acceptable mechanical property as a scaffold for biomedical field. Lastly, in vitro evaluation from results of viability, DNA content and cell morphology confirmed that hydrogels could maintain cell activity and support cell growth. Compared with pure hydrogel, composite hydrogel possessed better properties.
研究领域:
生物医学工程
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材料科学
·
组织工程
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纳米技术
·
药物递送系统
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PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2014
·
IF 4.908
Mingming Li,Jia Xu,Chia-Yuan Chang,Chenchen Feng,Lili Zhang,Yuanyuan Tang,Congjie Gao
This work deals with a facile approach to fabricate a novel nanofiltration (NF) membrane consisting of a dense active layer from polyethyleneimine (PEI) cross-linking on a porous polysulphone (PS) substrate which was modified by self-polymerized dopamine (DA). Inspired by the bioadhesion principle, a composite membrane with a poly(dopamine) (poly(DA)) layer was fabricated by simply dipping the PS substrate into DA aqueous solution. Later, the modified PS substrate was thermal-treated and then impregnated into PEI solution for PEI grafting on the poly(DA) layer. Finally, PEI cross-linking was performed and as a result a composite PS/DA/PEI c membrane with a dense cross-linked DA/PEI layer was obtained, which exhibited a typical NF property. Several parameters such as PEI grafting, thermal treatment, cross-linkers and operating conditions were investigated to obtain the optimum composite membrane with an excellent NF performance. The results showed that the optimum NF membrane yielded a permeation flux of 43.96 L/m 2 h and a rejection of 89.27% when 2000 mg/L MgCl 2 solution was used as a feed solution at 0.8 MPa, whereas a permeation flux of 49.21 L/m 2 h and a rejection of 27.30% were obtained for a feed NaCl concentration of 2000 mg/L. These results show the promising use of such NF membranes in water softening.
研究领域:
材料科学
·
生物仿生学
·
环境工程
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高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Hao-Chen Li,Xiao-Min Sun,Yong-Rui Huang,Yue-Hai Peng,Jia Liu,Li Ren
Collagen can self-assemble to form fibers with a unique structure and retain a reticular fibrous structure after membrane formation. However, collagen membranes without further modification are easy to tear. In this study, two crosslinkers (linear di-alkynyl poly(ethylene glycol) (DA-PEG) and branched tetra-alkynyl poly(ethylene glycol) (4arm-DA-PEG)) were synthesized, and exogenous crosslinking between collagen fiber bundles through the amino–yne click reaction was studied. Fourier-transform infrared spectroscopy (FT-IR) was performed to confirm the successful synthesis of crosslinkers and the construction of the crosslinked network. Scanning electron microscopy (SEM) showed that the crosslinked collagen membranes (Col/DA-PEG; Col/4arm-DA-PEG) had dense fibrous structures, which was expected to provide a structural foundation for surgical suturing. The denser structures and higher crosslinking degree of Col/4arm-DA-PEG provided good mechanical, optical, and antienzymatic properties. Col/4arm-DA-PEG could withstand 4.6 N/mm suture strength, which enabled it for suturing. Compared with glutaraldehyde-crosslinked membranes, Col/DA-PEG and Col/4arm-DA-PEG showed low cytotoxicity and better biocompatibility, as observed by CCK-8 assay and confocal laser scanning microscopy. These results indicate that alkynyl-terminated PEG systems can be used as ideal collagen crosslinkers to enhance the suture tension of collagen-based materials, especially in corneal repair materials.
研究领域:
材料科学
·
生物材料
·
组织工程
·
眼科学
·
化学
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高影响因子
危险品化学品经营许可证（带存储）