Nanomaterials
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2024
·Vol. 14
·期 20
·1629
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IF 4.4
Penghui Lei,Qing Chang,Mingkun Xiao,Chao Ye,Pan Qi,Fangjie Shi,Yuhua Hang,Qianwu Li,Qing Peng
A new type of SiCf/TiC-Ti3SiC2composite was prepared by the Spark Plasma Sintering (SPS) method in this work. The phase transformation and interface cracking of this composite under ion irradiation (single Xe, Xe + He, and Xe + He + H ions) and subsequent annealing were analyzed using transmission electron microscopy (TEM), mainly focusing on the interface regions. Xe ion irradiation resulted in the formation of high-density stacking faults in the TiC coatings and the complete amorphization of SiC fibers. The implanted H ions exacerbated interface coarsening. After annealing at 900 °C for 2 h, the interface in the Xe + He + H ion-irradiated samples was seriously damaged, resulting in the formation of large bubbles and cracks. This damage occurred because the H atoms reduced the surface free energy, thereby promoting the nucleation and growth of bubbles. Due to the absorption effect of the SiCf/TiC interface on defects, the SiC fiber areas near the interface recovered back to the initial nano-polycrystalline structure after annealing.
研究领域:
材料科学
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核材料
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复合材料
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Zhengxin Ma,Zeyuan Xing,Yao Zhao,Hongbo Zhang,Qiangwei Xin,Jie Liu,Meng Qin,Chunmei Ding,Jianshu Li
Multifunctional and sustainable packaging materials applicable to changeable conditions are in high demand as alternatives to petroleum-based polymers. Soybean polysaccharides (SPS) with remarkable antioxidation and film-formation properties are great candidates for sustainable packaging materials. However, the poor water resistance and mechanical properties of SPS hinder their further application. Inspired by the Janus properties of lotus leaf, we developed asymmetric multifunctional packaging films by addressing the problems of SPS while keeping their merits. Specifically, SPS-stabilized silver nanoparticles were incorporated with gelatin and wax to enhance the mechanical properties and water tolerance of the resulting film. Moreover, hierarchical micro-/nano-structures consisting of carnauba wax were feasibly fabricated on one side of the film, resembling the natural front lotus leaf. This Janus film has outstanding water resistance, outperforming all other SPS-based materials reported to date. In addition, the excellent antibacterial activity (>95 % against Escherichia coli and Staphylococcus aureus ), antioxidation properties (2-fold enhancements), and UV-blocking performance (∼100 % at 200–400 nm) were well retained. By virtue of these multifunctional properties, the resulting film has been successfully applied in food packaging, as evidenced by meat and fruit preservation experiments. This biomimetic strategy provides a reference for the fabrication of sustainable high-performance food packaging.
研究领域:
材料科学
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纳米技术
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食品科学
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仿生学
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可持续性
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产品关联
DOI
高影响因子
Microorganisms
·
2020
·Vol. 8
·期 3
·319
·
IF 4.152
Xuewei Li,Beibei Li,Shurui Cai,Yu Zhang,Mingjie Xu,Chunmei Zhang,Bo Yuan,Ke Xing,Sheng Qin
Black spot disease, which is caused by the pathogenic fungalCeratocystis fimbriata, seriously affects the production of sweet potato and its quality during postharvest storage. In this study, the preliminary identification of the rhizosphere actinomycete strain SPS-33, and its antifungal activity of volatilesin vitroandin vivowas investigated. Based on morphological identification and phylogenetic analysis of the 16S rRNA gene sequence, strain SPS-33 was identified asStreptomyces lavendulae.Volatile organic compounds (VOCs) emitted by SPS-33 inhibited mycelial growth and sporulation ofC. fimbriatain vitroand also induced a series of observable hyphae morphological changes. In anin vivopathogenicity assay, exposure to SPS-33 significantly decreased the lesion diameter and water loss rate in sweet potato tuberous roots (TRs) inoculated withC. fimbriata. It increased the antioxidant enzymes’ activities of peroxidase, catalase, and superoxide dismutase as well as decreased malondialdehyde and increased total soluble sugar. In the VOC profile of SPS-33 detected by a headspace solid-phase micro extraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS), heptadecane, tetradecane, and 3-methyl-1-butanol were the most abundant compounds. 2-Methyl-1-butanol, 3-methyl-1-butanol, pyridine, and phenylethyl alcohol showed strong antifungal effects againstC. fimbriata. These findings suggest that VOCs fromS. lavendulaeSPS-33 have the potential for pathogenC. fimbriatacontrol in sweet potato postharvest storage by fumigant action.Keywords:Ipomoea batatas(L.) Lam.;Streptomyces lavendulae;volatile organic compound;fumigant;antimicrobial
研究领域:
植物病理学
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微生物学
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产品关联
DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Pengyun Xu,Xiaoqing Zhang,Shupeng Wang,Guijie Liu,Thomas W. Coyle,Javad Mostaghimi,Xianfa Li,Mingli Lv
In this work, dual-scale superhydrophobic Al 2 O 3 –13%TiO 2 coatings were deposited rapidly via the combination of atmospheric plasma spray (APS) process and suspension plasma spray (SPS) process. A wire mesh shielding method was employed in the APS process, which resulted in the formation of micron-sized conical bump surface structures with uniform morphologies. The SPS process was then applied to deposit submicron-sized particles on the conical bump-structured coatings, forming dual-scale surface structures. The effects of the mesh and its size on the formation of different surface structures were investigated. The dual-scale coatings deposited via the APS+SPS processes and mono-scale coatings deposited via the APS process were comparatively investigated via characterizations of the microstructures, element distribution, surface topographies, and wetting behaviors. The dual-scale coatings showed superhydrophobic behaviors with the largest water contact angles of ∼154° and smallest roll-off angles of ∼7° and complete droplet rebounding performance after chemical modification, while the mono-scale coatings showed high adhesion to water. The correlations between the wetting behaviors and morphological characteristics of the surface structures were elaborated by establishing a mathematical model.
研究领域:
材料科学
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表面工程
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涂层技术
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等离子体加工
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润湿性控制
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产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Weijia Guo,Zhiyu Ma,Yutian Lu,Zhenxing Yue
High- Q and temperature-stable ceramics are indispensable in microwave engineering. However, medium-permittivity ( ε r ∼ 60, named as K60) microwave dielectric ceramics that meet the above demands are yet to be synthesized. High- Q Ba 4 Sm 9.33 Ti 16.5 Al 2 O 54 (BSTA) and Ca 0.6 Sm 0.27 Ti 0.8 Al 0.27 O 3 (CSTA) ceramics have large resonant frequency temperature coefficients ( τ f ) with opposite signs. The composites of the two are expected to have good dielectric properties , but there will be obvious diffusion when they are compounded with each other by sintering after directly mixing the raw powder, which would lead to severe deterioration in dielectric properties. In this work, the undesired diffusion can be effectively avoided by stacking two or three ceramic layers together, which are achieved by two methods named adhesive bonding and spark-plasma-sintering (SPS) cofiring. The finite element method (FEM) analysis with COMSOL Multiphysics proposed in this work can precisely predict the microwave dielectric properties of layered ceramics, helping to determine the ratio of different layers to reach near-zero τ f . The adhesive-bonded layered ceramics exhibit excellent dielectric properties: ε r = 62.2, Q × f = 21,400 GHz, and τ f = –0.7 ppm/°C. The SPS-cofired layered ceramics can be fabricated in one time, partially solving the problem of sintering mismatch between different layers, together with superior properties of ε r = 59.8, Q × f = 19,780 GHz, and τ f = –0.6 ppm/°C. These layered ceramics could fill the gap of high- Q and temperature-stable K60 microwave dielectric ceramics. The layer-stacking process and related FEM simulations can be used to design more high- Q and temperature-stable microwave dielectric ceramics and devices.
研究领域:
材料科学
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陶瓷
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微波工程
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介电材料
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DOI
高影响因子
PROGRESS IN NEURO-PSYCHOPHARMACOLOGY & BIOLOGICAL PSYCHIATRY
·
2022
·
IF 5.201
Lina Ruan,Kaiyu Guan,Yue Wang,Ming Gu,Yue Chen,Lisha Cai,Ruixuan Ye,Zhengwei Huang,Anqi Guo,Zhengkang Su,Xi Li,Jianchun Pan
Post-traumatic stress disorder (PTSD) is a serious mental disease featured by a stress dysfunction that occurs after an individual has faced intense mental stress, often accompanied by anxiety and chronic pain. Currently, the mainstream drug for PTSD is serotonin reuptake inhibitors (SSRIs), however, their pain management for patients is limited. Baicalein , a Chinese traditional herbal medicine, has shown promising results in treating anxiety, depression, and pain. In this study, we found that baicalein may alleviate single prolonged stress (SPS)-induced PTSD-like behaviors in mice without altering baseline nociceptive sensitivity or activity. Meanwhile, baicalein increased the noradrenaline (NE) and serotonin (5-HT) content and decreased the ratio of 5-hydroxyindoleacetic acid (5-HIAA)/5-HT by inhibiting the activity of monoamine oxidase A (MAO-A) in SPS-induce mice. The anxiolytic and antinociceptive effects induced by baicalein were totally abolished by 5-HT depleting agents. Moreover, the anxiolytic effects of baicalein could be abolished by the 5-HT 1A receptor antagonist WAY-100635, and the analgesic effects could be abolished by delta-opioid receptor antagonists in the spinal. Taken together, our study provides compelling evidence that baicalein reversed anxiety-like behaviors and neuropathic pain in PTSD through serotonergic system and spinal delta-opioid receptors.
研究领域:
药理学
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神经科学
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精神病学
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传统中药
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）