COMPOSITES PART B-ENGINEERING
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2023
·
IF 13.1
Shanshan Ma,Hejun Li,Jie Fei,Chang Li
Light-weight and high-modulus carbon fiber/phenolic composites, were in large demand of heavy-loading engineering, vehicles and aerospace fields. However, the limitation in the weak interface would cause serious stress concentration and structural failure of materials. Herein, aramid nanofiber (ANF) and cellulose nanofiber (CNF) as flexible units, and zeolitic imidazolate frameworks-8 (ZIF-8) as a rigid unit, were employed to establish a trans -scale reinforced structure on the interphase for balancing the modulus of fibers/resin and improving interfacial properties of the composites. This flexible-rigid (ANF/CNF-ZIF-8) scalable structure, contributed to the integration of various components and forming effective bonds between fibers and the matrix, further promoting mechanical and tribological performances of the composites. Due to the trans -scale interface enhancement of this unique flexible-rigid structure, the flexural strength of 30%ANF-ZIF-8-composite (S 1-3 ) and 30%CNF-ZIF-8-composite (S 2-3 ) improved by 77.68% and 88.46%, respectively. Meanwhile, the elastic modulus of S 1-3 and S 2-3 reached 5.41 and 5.40 GPa, indicating a significant ascent of 137.28% and 136.84%, respectively. This work provides a promising and effective strategy of constructing a flexible-rigid scalable interfacial structure and opens an avenue toward the large-scale fabrication of new-generation advanced materials .
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ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Xiaoping Zhang,Xiang Ren,Konstantin Chingin,Jiaquan Xu,Xin Yan,Huanwen Chen
We present an approach for the elucidation of C=C bond position and cis/trans isomers, which is achieved by the reaction of ambient water radical cations and double bonds, followed by the fragmentation of epoxide radical cations to generate diagnostic ions in tandem mass spectrometry . Hexenol double bond positional isomers and cis/trans isomers which exhibit different properties and biological functions are characterized as a proof of concept. The merits of the approach include the simplicity of experimental setup, rapid derivatization (within seconds), the obviation of organic solvents , as well as easy spectral interpretation.
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INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Zhunjing Wang,Yongjian Xie,Maidinai Sabier,Tao Zhang,Jianyu Deng,Xuming Song,Zhihong Liao,Qingguang Li,Shengxiang Yang,Yang Cao,Xingquan Liu,Guoxin Zhou
The safe storage and protection of grain includes the exploitation of plant-based fumigants as a green control technology. This study first determined the fumigant toxicity of 12 traditional Chinese medicinal plants against adults of the rusty grain beetle, Cryptolestes ferrugineus (Stephens), one of the most ubiquitous and pestilent grain storage pests worldwide. Exposure to volatiles released from Illicium verum Hook. f. powder was found to be by far the most lethal. Illicium verum power and its volatiles eluent were then confirmed to be highly effective in killing both larvae and adults of C. ferrugineus . Star anise volatiles also showed good biological activity against Lasioderma serricorne (Fabricius) and Sitophilus zeamais Motschulsky, but not Tribolium castaneum Herbst. No significant differences were found in mortality of the adults of the rusty grain beetle when exposed at different temperatures ranging from 15−35°C. Gas chromatography-mass spectrometry (GC–MS) analysis showed that the main components of the eluent of star anise powder were trans -anethole (62.60%), estragole (23.70%), linalool (3.66%) and d -limonene (2.15%). In the fumigation test using synthetic standards of these four chemicals, only trans -anethole showed effective biological activity with exposure to 30 mL/L trans -anethole for 24 h resulting in 100% mortality of rusty grain beetle adults. Estragole did significantly enhance fumigant efficiency of trans -anethole. We further found that trans -anethole affects the beetles acetylcholinesterase activity, which was inhibited and decreased by 64.48% within 24 h. The results therefore show that trans -anethole, the major component of star anise volatiles contributes to its fumigant toxicity against C. ferrugineus by, at least partly, affecting its insect nervous system. Hence, star anise or its biologically active substances show very good potential to be used as a botanical insecticide to control C. ferrugineus .
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JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2020
·
IF 1.701
Hai-Feng Liu,Zhu Wang,Cheng-Jun Sun
The old-fashioned yet effective trans-printing method was adopted to prepare Janus fabric in the study. Nonwoven cotton fabric was firstly immersed in tetrahydrofuran solution containing P(DMAEMA-co-TMSPMA), a polymer synthesized by copolymerization between N, N-dimethylaminoethyl methacrylate (DMAEMA) and 3-(trimethoxysilyl)propylmethacrylate (TMSPMA), followed by thermal treatment, thus endowing the fabric with the demulsification property. Next, one side of the above prepared fabric was overlapped and rolled with donor fabric containing PDMS-g-TMOS, a polymer synthesized by thiol/ene click reaction between multi-vinyl poly(dimethylsiloxane) (vinyl-PDMS) and 3-mercaptopropyltrimethoxysilane (MPTMOS). The PDMS-g-TMOS polymer infiltrated into the fabric cured with P(DMAEMA-co-TMSPMA) to a certain depth, followed by thermal treatment. Thus, the resultant fabric had both the superhyrophilic side for oil coalescence and the superhyrophobic side for oil permeation. The Janus fabric structure was confirmed by metalloscope, unidirectional water transport property (UDWT), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). When the prepared fabric was used to separate model oil hexadecane (HD) from oil-in-water emulsion, the maximum separation speed was 134.5 kg h−1 m−2. The recovery rate of HD respectively reached 96.0% after 60 min and 99.9% after 150 min. The Janus fabric prepared by the trans-printing method is particularly suitable for industrial production and of great industrial value.
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CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Zhijun Li,Honghong Li,Dundong Yuan,Leipeng Leng,Mingyang Zhang,Minghui Di,J. Hugh Horton,Jun Wang,Litao Sun,Weiwei Sun
Exploring the interaction between metal and support is of great importance in enhancing the catalytic performance and deepening the mechanistic understanding of single atom catalysis. Here we describe a photoinduction method to construct atomically dispersed palladium atoms supported over defect-containing boehmite (γ-AlOOH) nanoleaf with a palladium loading of 0.32 wt%. The existence of singly dispersed palladium atoms is confirmed by spherical aberration correction electron microscopy, extended X-ray absorption fine structure measurement, and CO-absorbed diffuse reflectance infrared Fourier transform spectroscopy. This catalyst shows excellent catalytic efficiency in trans -stilbene epoxidation to yield trans -stilbene oxide (TOF: 416 h −1 ; conversion: 84 %; selectivity: 99 %), along with excellent recyclability and scalability. In addition, various aromatic olefins were successfully transformed into the corresponding epoxides with high selectivity and excellent yield. DFT study further reveals that the high catalytic activity originates from under-coordinated single palladium atoms in the defect-containing γ-AlOOH in a unique coordination environment. This lays the foundation for the facile creation of single atom catalysts and sheds light on the possibility for scale-up production.
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Food and Bioprocess Technology
·
2019
·Vol. 12
·期 11
·1809-1820
·
IF 3.032
Guo Hongna,Qin Xiaojie,Wu Yingfeng,Yu Wei,Liu Jia,Xi Yuting,Dou Guoxia,Wang Luyao,Xiao Hongmei
Botrytis cinerea is one of the most destructive pathogens of cherry tomatoes during preharvest and postharvest phase. Our previous study demonstrated that volatile organic compounds (VOCs) produced by Hanseniaspora uvarum could markedly suppress the mycelium growth and conidia germination of B. cinerea . However, the main inhibitory VOCs of H. uvarum are not fully clear. In this study, a total of 21 volatile organic monomers (VOMs) of H. uvarum were tested for their antifungal activity against B. cinerea in vitro . It was found that trans -cinnamaldehyde, 2-nonanone, ethyl caprylate, benzyl alcohol, hexanoic acid, hexyl alcohol, isobutyl acetate, ethyl propionate, isoamyl acetate, ethyl 2-methylbutyrate, phenethyl alcohol, ethyl acetate, 4-ethylphenol, 3-phenyl-1-propanol, ethyl cinnamate, 3-methyl-1-butanol, and ethyl 3-hydroxybhexanoate could significantly inhibit mycelium growth within 3 days at higher concentrations, whereas ethyl 3-hydroxybutyrate, ethyl caprate, decanoic acid, and lauric acid exhibited a lower inhibition. Furthermore, the five VOMs, including trans -cinnamaldehyde, 2-nonanone, ethyl caprylate, benzyl alcohol, and hexanoic acid, also had the efficiency on inhibiting conidia germination. In particular, trans -cinnamaldehyde was the best inhibitor of mycelium growth and conidia germination. Hence, trans -cinnamaldehyde was also tested in vivo as postharvest biofumigants. In vivo assay showed that trans -cinnamaldehyde could significantly reduce B. cinerea infection of cherry tomatoes and maintain fruit hardness, color, total soluable solids, and titratable acidity under conditions of artificial and natural infection. Collectively, these results indicated that trans -cinnamaldehyde, the main inhibitory VOMs of H. uvarum , has the potential for effectively controlling postharvest gray mold of cherry tomatoes and maintaining fruit quality in commercial application.
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RSC Advances
·
2018
·Vol. 8
·期 46
·25941-25948
·
IF 2.936
Shujing Li,Li Yuan,Bing Zhang,Wei Zhou,Xinrui Wang,Dongsheng Bai
The inclusion complexes of trans-polydatin and three cyclodextrins (CDs), namely β-cyclodextrin (β-CD), methyl-β-cyclodextrin (Me-β-CD) and (2-hydroxy) propyl-β-cyclodextrin (HP-β-CD) were prepared. The effects of the inclusion behavior of trans-polydatin with three kinds of CDs were investigated in both solution and the solid state with the following methods: phase-solubility, X-ray diffraction (XRD), thermogravimetric analysis (TG), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM), proton nuclear magnetic resonance (1H-NMR) and two-dimensional rotational frame nuclear overhauser effect spectroscopy (2D ROESY). The results indicated that trans-polydatin formed a 1 : 1 stoichiometric inclusion complex with CDs. Meanwhile, the solubility and thermal stability of the inclusion complexes were improved after encapsulating by CDs. Furthermore, the photostability of trans-polydatin was enhanced after forming the inclusion complexes. The antioxidant activities results showed that the antioxidant performance of the inclusion complexes was enhanced in comparison to the native trans-polydatin. Therefore, it can be a potentially promising way to promote its drug bioavailability or phytochemical preparations.
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ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2018
·Vol. 25
·期 35
·35479-35491
·
IF 2.8
Ren Jingyu,Jiang Nan,Li Jie,Shang Kefeng,Lu Na,Wu Yan
Trans-ferulic acid (FA), extensively used in pharmaceutical and olive oil industries, causes huge risks to ecological environment due to its biotoxicity and phytotoxicity, leading to the difficulty of biochemical processes in treating FA wastewater. In this study, synergistic degradation of FA via dielectric barrier discharge (DBD) plasma and O 3 (plasma-ozone) was studied. The results showed that FA degradation efficiency reached 96.9% after a 40-min treatment by plasma-ozone process, and the energy efficiency of FA degradation was increased by 62.5 and 24.5% compared to single DBD plasma and ozonation treatment. Moreover, FA degradation rate constant in plasma-ozone process was 41% higher compared with the sum of single DBD plasma and ozonation, indicating a significant synergistic effect. Radical diagnosis experiments reveal that a profound increase of ·OH yield through peroxone (H 2 O 2 /O 3 ) and UV/O 3 pathways is the important mechanism of synergistic degradation of FA in plasma-ozone process, while e aq − played little role in FA degradation. A degradation pathway of FA by plasma-ozone was also proposed according to the detected intermediates from EEM and LC-MS. This work revealed that plasma-ozone process is an alternative process for FA treatment, and the findings are helpful for understanding FA degradation characteristics and synergistic mechanisms in plasma-ozone process.
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Asian Journal of Pharmaceutical Sciences
·
2018
·
IF 4.56
Lingfei Han,Lejian Hu,Fulei Liu,Xin Wang,Xiaoxian Huang,Bowen Liu,Feng Feng,Wenyuan Liu,Wei Qu
The application of paclitaxel (PTX) in clinic has been restricted due to its poor solubility. Several traditional nano-medicines have been developed to improve this defect, while they are still lack of tumor targeting ability and rapid drug release. In this work, an amphiphilic polymeric micelle of hyaluronic acid (HA) – all-trans-retinoid acid (ATRA) with a disulfide bond, was developed successfully for the co-delivery of PTX and ATRA. The combination chemotherapy of PTX and ATRA can strengthen the anti-tumor activity. Along with self-assembling to micelles in water, the delivery system displayed satisfying drug loading capacities for both PTX (32.62% ± 1.39%) and ATRA, due to directly using ATRA as the hydrophobic group. Rapid drug release properties of the PTX-loaded redox-sensitive micelles (HA-SS-ATRA) in vitro were confirmed under reducing condition containing GSH. Besides, HA-CD44 mediated endocytosis promoted the uptake of HA-SS-ATRA micelles by B16F10 cells. Due to these properties, cytotoxicity assay verified that PTX-loaded HA-SS-ATRA micelles showed concentration-dependent cytotoxicity and displayed obvious combination therapy of PTX and ATRA. Importantly, HA-SS-ATRA micelles could remarkably prolong plasma circulation time after intravenously administration. Therefore, redox-sensitive HA-SS-ATRA micelles could be utilized and explored as a promising drug delivery system for cancer combination chemotherapy.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2015
·Vol. 132
·期 30
·
IF 1.768
Huiwen Zhao,Guofei Chen,Yu Zhou,Xing Li,Xingzhong Fang
A novel dianhydride, trans -1,2-bis(3,4-dicarboxyphenoxy)cyclohexane dianhydride (1,2-CHDPA), was prepared through aromatic nucleophilic substitution reaction of 4-nitrophthalonitrile with trans -cyclohexane-1,2-diol followed by hydrolysis and dehydration. A series of polyimides (PIs) were synthesized from one-step polycondensation of 1,2-CHDPA with several aromatic diamines, such as 2,2′-bis(trifluoromethyl)biphenyl-4,4′-diamine (TFDB), bis(4-amino-2-trifluoromethylphenyl)ether (TFODA), 4,4′-diaminodiphenyl ether (ODA), 1,4-bis(4-aminophenoxy)benzene (TPEQ), 4,4′-(1,3-phenylenedioxy)dianiline (TPER), 2,2′-bis[4-(3-aminodiphenoxy)phenyl]sulfone ( m -BAPS), and 2,2′-bis[4-(4-amino-2-trifluoromethylphenoxy)phenyl]sulfone (6F-BAPS). The glass transition temperatures ( T g s) of the polymers were higher than 198°C, and the 5% weight loss temperatures ( T d5% s) were in the range of 424–445°C in nitrogen and 415–430°C in air, respectively. All the PIs were endowed with high solubility in common organic solvents and could be cast into tough and flexible films, which exhibited good mechanical properties with tensile strengths of 76–105 MPa, elongations at break of 4.7–7.6%, and tensile moduli of 1.9–2.6 GPa. In particular, the PI films showed excellent optical transparency in the visible region with the cut-off wavelengths of 369–375 nm owing to the introduction of trans -1,2-cyclohexane moiety into the main chain. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42317.
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Journal of Materials Chemistry B
·
2016
·Vol. 5
·期 5
·907-916
·
IF 4.872
Yiming Liu,Xiaole Peng,Kun Qian,Yingying Ma,Jiangshan Wan,Han Li,Hongsen Zhang,Guofeng Zhou,Bin Xiong,Yanbing Zhao,Chuansheng Zheng,Xiangliang Yang
Temperature sensitive p(N-isopropylacrylamide-co-acrylic acid) modified gold nanoparticles (GNP@PNA) were prepared via coordination bonding between gold and sulfur elements. Their diameter and zeta potential were 86 nm and −26.2 mV at 25 °C, and 47 nm and −30.5 mV at 37 °C respectively. Thermogravimetric characterization of GNP@PNA indicated that the PNA shell and the GNP core accounted for 19.2 wt% and 78.2 wt%, namely ca. 70–80 chains of PNA were combined on the surface of one GNP nanoparticle. GNP@PNA showed much better X-ray attenuation ability, ca. 1.6–3.3 times higher than that of Omnipaque. In addition, the temperature sensitive sol–gel transition of GNP@PNA dispersions could realize the so-called “in situ casting” embolization from tumoral aorta to peripheral arteries, and improve their angiographic ability owing to the inhibition against GNP aggregation via gelation. Renal artery embolization on normal rabbits and TAE on VX2 tumor-bearing rabbits indicated that GNP@PNA achieved better embolization for longer times than Ivalon and Lipiodol. Excellent biocompatibility of GNP@PNA dispersions was also observed via the evaluation of cytotoxicity, hemolysis and hepatorenal function.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2016
·
IF 2.822
Lisiqi Xie,Xiao Huang,Xingyu Lin,Bin Su
Miniaturization of the interface between two immiscible electrolyte solutions (ITIES) brings the benefits of enhanced mass transport in comparison with the macroscopic ITIES, similar to those observed with an ultramicroelectrode. In this work, ultrathin free-standing silica isoporous membrane (SIM, 80 nm in thickness) consisting of a high density of perforative channels with a uniform size (2–3 nm in diameter) was used to construct nanoscopic ITIES (nano-ITIES) arrays. Electrochemical characterization of the nano-ITIES array by studying the ion-transfer voltammetric behavior of tetra- n -propylammonium (TPrA + ) suggested the domination of hemispherical molecular diffusion. The effect of trans-membrane resistance on the heterogeneous ion transfer was investigated by varying the supporting electrolyte concentration in both phases, which was found to be negligible due to the ultrathin thickness and high channel density of SIM. In addition, the nano-ITIES array exhibited excellent charge selectivity towards ionizable species due to the overlap of electrical double layer in the ultrasmall silica channels, which could be modulated by the supporting electrolyte concentration, aqueous solution pH and channel surface modification. These findings provide the basis for the nano-ITIES array to be used in ion detection and separation.
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