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Green Energy & Environment 2024年第1期9卷 71-80页

作者： Weijie Kou yafang zhang Wenjia Wu Zibiao Guo Quanxian Hua Jingtao Wang School of Chemical Engineering Zhengzhou UniversityZhengzhou450001China

Solid polymer electrolyte(SPE) shows great potential for all-solid-state batteries because of the inherent safety and flexibility;however, the unfavourable Li+deposition and large thickness hamper its development and application. Herein, a laminar MXene functional layer-thin SPE layer-cathode integration(MXene-PEO-LFP) is designed and fabricated. The MXene functional layer formed by stacking rigid MXene nanosheets imparts higher compressive strength relative to PEO electrolyte layer. And the abundant negatively-charged groups on MXene functional layer effectively repel anions and attract cations to adjust the charge distribution behavior at electrolyte–anode interface. Furthermore,the functional layer with rich lithiophilic groups and outstanding electronic conductivity results in low Li nucleation overpotential and nucleation energy barrier. In consequence, the cell assembled with MXene-PEO-LFP, where the PEO electrolyte layer is only 12 μm, much thinner than most solid electrolytes, exhibits uniform, dendrite-free Li+deposition and excellent cycling stability. High capacity(142.8 mAh g-1), stable operation of 140 cycles(capacity decay per cycle, 0.065%), and low polarization potential(0.5 C) are obtained in this Li|MXene-PEO-LFP cell,which is superior to most PEO-based electrolytes under identical condition. This integrated design may provide a strategy for the large-scale application of thin polymer electrolytes in all-solid-state battery.

关键词： MXene nanosheet Laminar functional layer Thin polymer electrolyte Dendrite-free Liþdeposition All-solid-state lithium battery

Formatted PVDF in lamellar composite solid electrolyte for solidstate lithium metal battery

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Nano Research 2024年第6期17卷 5159-5167页

作者： Xinji zhang yafang zhang Shiyue Zhou Jingchuan Dang Chenye Wang Wenjia Wu Jingtao Wang School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China

Solid polymer electrolytes(SPEs)hold great application potential for solid-state lithium metal battery because of the excellent interfacial contact and processibility,but being hampered by the poor room-temperature conductivity(~10^(−7)S·cm^(−1))and low lithium-ion transference number(tLi+).Here,a lamellar composite solid electrolyte(Vr-NH_(2)@polyvinylidene fluoride(PVDF)LCSE)withβ-conformation PVDF is fabricated by confining PVDF in the interlayer channel of-NH_(2)modified vermiculite lamellar *** demonstrate that the conformation of PVDF can be manipulated by the nanoconfinement effect and the interaction from channel *** presence of-NH_(2)groups could induce the formation ofβ-conformation PVDF through electrostatic interaction,which serves as continuous and rapid lithium-ion transfer *** a result,a high room-temperature ionic conductivity of 1.77×10^(−4)S·cm^(−1)is achieved,1-2 orders of magnitude higher than most ***,Vr-NH_(2)@PVDF LCSE shows a high tLi+of 0.68 because of the high dielectric constant,~3 times of that of PVDF SPE,and surpassing most of reported *** LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)||Li cell assembled by Vr-NH_(2)@PVDF LCSE obtains a discharge specific capacity of 137.1 mAh·g^(−1)after 150 cycles with a capacity retention rate of 93%at 1 C and 25℃.This study may pave a new avenue for high-performance SPEs.

关键词： solid-state lithium metal battery lamellar composite solid electrolyte β-conformation polyvinylidene fluoride(PVDF) room-temperature ionic conductivity lithium-ion transference number

Lignans are the main active components of Schisandrae Chinensis Fructus for liver disease treatment:a review

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Food Science and Human Wellness 2024年第5期13卷 2425-2444页

作者： Ke Fu Shu Dai Cheng Ma yafang zhang Shenglin zhang Cheng Wang Lihong Gong Honglin Zhou Yunxia Li State Key Laboratory of Southwestern Chinese Medicine Resources Key Laboratory of Standardization for Chinese Herbal MedicineMinistry of EducationSchool of PharmacyChengdu University of Traditional Chinese MedicineChengdu 611137China

As a traditional Chinese herbal medicine,Schisandrae Chinensis Fructus(SC)has been used in medicine and food industry due to its health care and therapeutic *** the past 20 years,the use of SC and its active ingredient lignans in the prevention and treatment of liver diseases has been increasing,and their hepatoprotective effects has increased the interest of the public and ***,in the present work,we first determined the effectiveness of SC in the treatment of liver diseases such as metabolic associated fatty liver disease,alcoholic liver disease,cholestatic liver disease and acute liver ***,the pharmacological effects and molecular mechanisms of lignans,the active components of SC,for liver disease treatment were comprehensively summarized for the first *** results showed that the lignans in SC could achieve hepatoprotective effects by regulating lipid metabolism,anti-fibrosis,anti-inflammation,anti-oxidation,anti-tumor and regulating bile acid *** mechanism mainly involved adenosine 5’-monophosphate-activated protein kinase,endoplasmic reticulum stress,sterol regulatory element binding protein 1c,autophagy,transforming growth factor-β,mitogen-activated protein kinase,microRNA,nuclear factor kappa-B,nuclear factor erythroid-2-related factor 2,heat shock proteins and pregnane X receptor signaling *** results can lay a scientific foundation for the development of hepatoprotective drugs or functional foods from SC/lignans.

关键词： Schisandrae Chinensis Fructus Lignans Hepatoprotection Pharmacological effects Molecular mechanism

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Natural product chlorogenic acid achieves pharmacological activity and health protection via regulating gut microbiota

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Food Science and Human Wellness 2024年

作者： Ke Fu Shu Dai yafang zhang Jia Gong Cheng Wang Chenhao Yao Shenglin zhang Cheng Peng Yunxia Li State Key Laboratory of Southwestern Chinese Medicine Resources， Key Laboratory of Standardization for Chinese Herbal Medicine， Ministry of Education， School of Pharmacy， Chengdu University of Traditional Chinese Medicine College of Enology， Northwest A&F University

Chlorogenic acid (CA) is a natural plant-derived polyphenol compound that is widely present in beverages (coffee and tea)， fruits (blueberry， apple， and mulberry)， and medicinal plants (Lonicera japonica， Eucommia ulmoides， and Cichorium intybus). In recent years， CA has attracted extensive attention due to its various health benefits， such as anti-inflammatory， immunomodulatory， anti-obesity， anti-diabetes mellitus， and neuroprotection activities. Interestingly， the low bioavailability of CA corresponds to high bioactivity， which raises a key scientific question of how low bioavailability CA can achieve high biological activity. In this review， we highlight the gut microbiota as a key target for connecting the two by summarizing a large amount of evidence. Specifically， the composition and abundance of gut microbiota， its metabolites， intestinal immunity， barrier function and so on were all changed under different pathological conditions such as inflammatory bowel disease， liver disease， kidney disease， cardiovascular disease， diabetes mellitus， obesity， etc. Conversely， these changes could be reversed by CA. In a word， CA could achieve pharmacological activity as well as health-protective effects by modulating intestinal immune and barrier function， gut microbiota composition， gut microbiota metabolites， and signaling pathways. This review provides new targets for the prevention and treatment of diseases by CA. Meanwhile， regulating the composition of the gut microbiota through natural products may be a potential strategy to achieve health protection.

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不同储存容器对凤香型基酒储存前期风味形成的探究

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食品与发酵工业 2024年第5期50卷 124-130页

作者：任璐张亚芳张永利陕西西凤酒股份有限公司陕西宝鸡721400

该研究通过连续两年对不同储存容器中基酒的理化指标、挥发性风味物质的追踪测定及感官品评的方法,探究不同储存容器对凤香型基酒储存过程中风格特点形成的影响。结果表明,两年期间,不锈钢罐和陶坛储存基酒中pH缓慢降低,总酸升高不到3%... 详细信息

该研究通过连续两年对不同储存容器中基酒的理化指标、挥发性风味物质的追踪测定及感官品评的方法,探究不同储存容器对凤香型基酒储存过程中风格特点形成的影响。结果表明,两年期间,不锈钢罐和陶坛储存基酒中pH缓慢降低,总酸升高不到3%,总酯含量分别降低5.45%、6.75%;酒海(凤香型白酒特有储存容器)因碳酸钙的引入和良好的透气性加速了酯类物质的水解、挥发性酸类物质的排出及醇、醛的氧化作用,使得基酒pH显著升高,总酸和总酯明显降低,下降率分别约75%和34%。陶坛和酒海良好的透气性有利于基酒老熟和邪杂味排入环境,尤其是酒海储存凤香型白酒中蜜香突出和酒海味明显。通过对58种挥发性物质进行主成分分析和热图分析发现,采用不同储存容器储存一年的基酒特征风味物质及其相似,但与新产基酒及储存两年基酒都具有显著性差异;不锈钢罐和陶坛储存两年的基酒特征风味物质较为接近。新酒中丁酸丁酯、乙酸乙酯、丁酸乙酯、丁酸等低分子酯类、酸类物质含量较高,使得新酒放香大、新酒味、酸臭味较重。储存一年的基酒中8-甲基壬酸、辛酸、辛酸己酯等挥发性物质含量较多,甜香、水果香味突出。储存两年的基酒中异戊酸乙酯、乙酸丁酯等酯类及己醇、异戊醇等醇类较多,使得基酒具有菠萝香、水果香、花香等风味,尤其是酒海储存两年基酒中较高含量的壬酸乙酯、己酸丙酯使得基酒甜香、老窖香突出,还赋予基酒独有的蜜香。

关键词：酒海陶坛不锈钢罐挥发性风味物质凤香型基酒

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噻唑类化合物的合成研究进展

有机化学 2024年第5期44卷 1458-1479页

作者：张雅芳黄轩林琪钟海琼翁志强吴伟闽江学院材料与化学工程学院福州350108 闽江学院福建省中国漆新型材料工程研究中心福州350108 闽江学院绿色材料与化工福建省高校工程研究中心福州350108

噻唑环是含氮、硫杂原子的五元芳杂环,广泛存在于药物、天然产物和功能材料中,目前已有很多关于合成噻唑化合物的研究报道.本综述聚焦于介绍制备噻唑环的合成方法以及这些合成方法的底物适用范围,希望能够帮助其他研究者高效地合成和应... 详细信息

噻唑环是含氮、硫杂原子的五元芳杂环,广泛存在于药物、天然产物和功能材料中,目前已有很多关于合成噻唑化合物的研究报道.本综述聚焦于介绍制备噻唑环的合成方法以及这些合成方法的底物适用范围,希望能够帮助其他研究者高效地合成和应用噻唑化合物.

关键词：噻唑五元杂芳烃合成方法应用

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玻璃砂超高性能水泥基复合材料的制备及性能

深圳大学学报（理工版） 2024年第1期41卷 66-73页

作者：张亚芳曾科包嗣海段莉斌张维健广州大学土木工程学院广东广州510006

为实现超高性能水泥基复合材料(ultra-high performance cementitious composite,UHPCC)的可持续性和环保性,以玻璃砂替代UHPCC中的河砂,制作玻璃砂超高性能水泥基复合材料(glass sand ultrahigh-performance cementitious composite,GS-UHPCC),通过开展力学性能试验,探讨不同玻璃砂替代率和玻璃砂粒径对GS-UHPCC抗压、抗折性能的影响,定量表征GS-UHPCC的弯曲韧性和能量吸收能力,并通过X射线衍射和扫描电镜试验,分析了玻璃砂的增韧机理.结果表明,以平均粒径为0.27 mm的玻璃砂替代河砂,当体积替代率为40%时效果最好,替代后GS-UHPCC在养护28 d时的抗压强度相较于未掺时提升了17.0%,抗折强度提升了14.8%,能量吸收能力最优,微观结构致密,水化反应最为完全.本研究得出的最优玻璃砂替代率与粒径,可为GS-UHPCC的应用提供可行性支持.

关键词：混凝土超高性能水泥基复合材料玻璃砂力学性能水化反应火山灰效应能量吸收能力

NUMERICAL STUDY ON PROPERTIES OF WEAK INTERLAYER OF LAMINATED COMPOSITE

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Acta Mechanica Solida Sinica 2010年第3期23卷 231-239页

作者： yafang zhang Chun'an Tang Faculty of Civil Engineering Guangzhou University Guangzhou 510006 China Dalian University of Technology Dalian 116024 China

With assumption of material inhomogeneity on meso level, a three-point bending beam model has been adopted to simulate crack propagation in two dimensional laminated composite and to verify the toughening mechanism of energy dissipation and crack deflection along the weak interlayer. Moreover, the effect of strength, elastic modulus and thickness of the weak interlayer on both strength and toughness of the laminated composite have also been investigated in this paper.

关键词： laminated composite inhomogeneity crack process toughening

Effect of Interfacial Strength on Bending Properties of Reinforced Concrete Beams

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Journal of Wuhan University of Technology(Materials Science) 2013年第6期28卷 1161-1166页

作者： zhang yafang YANG Wenlong LIU Hao Faculty of Civil Engineering Guangzhou University

By taking into consideration of meso-scopic level, four-point bending numerical model of different interfaces was established to analyze the effect of interracial strength on the bending properties of reinforced concrete beams with the diagrams of crack pattern, the load- step curve and the cumulative AE- loading step curve. The experimental result shows that the peak load, the cracking load and the stiffness before cracking increase with the interfacial strength. Furthermore, the specimen with strong interface presents high brittleness during the failure process, while both bearing capability and ductility could be found in the specimen with moderate interfacial strength.

关键词： reinforced concrete interfacial strength peak load acoustic emission

The Failure Mechanism of CFRP Reinforced RC Beam under Impact Loads

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Journal of Wuhan University of Technology(Materials Science) 2022年第6期37卷 1246-1251页

作者： LU Juan zhang yafang School of Civil Engineering Guangzhou UniversityGuangzhou 510006China

The influence of carbon fiber reinforced plastic(CFRP)on dynamic mechanical properties of reinforced concrete(RC)beam was studied by drop hammer impact test *** impact behaviors of beam,including failure mode,impact force peak value and peak deflection were *** experimental results show that bonding CFRP can reduce the crack width and change the failure mode of the *** length of CFRP has a certain influence on the impact force and deflection,and the peak inertia force of most beams is roughly in the range of 1/2-5/6 of the peak impact *** addition,dynamic increase factor(DIF)increases with the increase of CFRP length,and its maximum value can reach 2.11.

关键词： CFRP RC beam failure mode impact resistance DIF