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Wet spinning of PVA composite fibers with a large fraction of multi-walled carbon nanotubes

Progress in Natural Science:Materials International 2015年第5期25卷 445-452页

作者： Dengpan Lai Yizhe Wei Liming Zou yongjing xu Hongwei Lu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University

PVA composites fibers with a large fraction of multi-walled carbon nanotubes modified by both covalent and non-covalent functionalization were produced by a wet-spinning *** XQ-1 tensile tester,thermogravimetric analysis,scanning electron microscopy,differential scanning calorimetry,and wide-angle X-ray diffraction were used to characterize the properties of PVA/MWNT composite *** TGA results suggested that MWNTs content in composite fibers were ranged from 5.3 wt%to 27.6 wt%.The mechanical properties of PVA/MWNT composite fibers were obviously superior to pure PVA *** Young's modulus of composite fibers enhanced with increasing the content of MWNTs,and it rised gradually from 6.7 GPa for the pure PVA fiber to 12.8 GPa for the composite fibers with 27.6 wt%***,the tensile strength increased gradually from 0.39 GPa for the pure PVA fiber to 0.74 GPa for the composite fibers with 14.4 wt%***,the tensile strength of the composite fibers decreased as the MWNTs content up to 27.6 wt%.SEM results indicated that the MWNTs homogeneously dispersed in the composite fibers,however some agglomerates also existed when the content of MWNTs reached27.6 wt%.DSC results proved strong interfacial interaction between MWNTs and PVA chain,which benefited composite fibers in the efficient *** characterization showed that the orientation of PVA molecules declined from 94.1%to 90.9%with the increasing of MWNTs *** good dispersibility of MWNTs throughout PVA matrix and efficient stress-transfer between MWNTs and PVA matrix may contributed to significant enhancement in the mechanical properties.

关键词： Multi-walled carbon nanotubes(MWNTs) Poly(vinyl alcohol)(PVA) Wet-spinning Composite fibers

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超临界流体技术在鱼油加工中的应用研究进展

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中国油脂 2024年第9期49卷 16-22页

作者：干淼钰田方曹爱玲邢家溧胡晓林王晓娜徐咏菁蔡路昀浙江大学宁波科创中心生物系统工程与食品科学学院浙江宁波315000 浙江海洋大学食品与药学学院浙江舟山316022 浙江省海产品健康危害因素关键技术研究重点实验室浙江舟山316022 杭州海关丝类检测中心杭州310012 宁波市产品食品质量检验研究院浙江宁波315048 龚老汉控股集团有限公司杭州310000 宁波宏纬食品有限公司浙江宁波315193

旨在为鱼油产业的绿色可持续发展提供参考,系统介绍了超临界流体(SCF)技术在鱼油提取、鱼油中二十碳五烯酸(EPA)和二十二碳六烯酸(DHA)富集、鱼油结构改性及微胶囊化中的应用,并对SCF技术在鱼油加工中的发展方向进行展望。鱼油的SCF提... 详细信息

旨在为鱼油产业的绿色可持续发展提供参考,系统介绍了超临界流体(SCF)技术在鱼油提取、鱼油中二十碳五烯酸(EPA)和二十二碳六烯酸(DHA)富集、鱼油结构改性及微胶囊化中的应用,并对SCF技术在鱼油加工中的发展方向进行展望。鱼油的SCF提取在较低温度和惰性环境中完成,能够有效防止脂质氧化,最大限度保持其天然生物活性。SCF技术可以去除鱼油中的异味、短链脂肪酸等,进一步富集EPA、DHA等ω-3多不饱和脂肪酸,大大提高产品的附加值,SCF还可作为鱼油酶促结构改性的溶剂介质,显著提高产品中EPA和DHA的含量。利用SCF技术生产鱼油微胶囊能够减少有机溶剂的使用,产品质量较好。综上,开发基于SCF技术的集鱼油提取、富集、微胶囊化为一体的连续化工艺,将成为未来研究方向之一。

关键词：超临界流体鱼油提取多不饱和脂肪酸微胶囊化

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A novel clustered SPIO nanoplatform with enhanced magnetic resonance T2 relaxation rate for micro-tumor detection and photothermal synergistic therapy

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Nano Research 2020年第8期13卷 2216-2225页

作者： Hongwei Lu yongjing xu Ruirui Qiao Ziwei Lu Pin Wang Xindan Zhang An Chen Liming Zou Zhongling Wang Department of Radiology Shanghai General HospitalSchool of MedicineShanghai Jiaotong UniversityShanghai200080China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China ARC Centre of Excellence in Convergent Bio-Nano Science and Technology Monash Institute of Pharmaceutical SciencesMonash University381 Royal ParadeParkvilleVIC3052Australia Department of Radiology The First Affiliated Hospital of Soochow UniversitySuzhou215006China Department of Gastroenterology Nanjing Drum Tower HospitalAffiliated Hospital of Nanjing University Medical SchoolNanjing210029China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China

Construction of micro tumor sensitive theranostic nanoagents that can increase the accuracy of imaging diagnosis and boost the therapeutic efficacy has been demonstrated for a promising approach for diagnosis and treatment of ***,we reported a novel super-paramagnetic iron oxide(SPIO)based nanoplatform that possess significantly enhanced magnetic resonance property and photothermal effect for tumor theranostic *** polyethylene glycol with four phenylboronic acid(PEG-B4)/CNTs@porphyrin(ph)/SPIO(BCPS)nanoplatform was simply prepared via integrated SPIO,ph,and a novel dendrimer with PEG liner and four PBA groups(PEG-B4)on the surface of carbon nanotubes(CNTs).Subsequently,a significant T2 relaxation rate enhanced can be achieved by the reduced accessibility of water to SPIO ***,the synergetic enhanced photothermal from BCPS nanoplatform contributed to better photothermal effect for cancer ***,the targeting ability to sialic acid overexpressed tumor was further introduced from phenylboronic acid from *** showed that BCPS nanoplatform could not only selectively identify solid tumors and detect micro-sized metastatic tumor(1 mm)in the liver,but also effectively ablate tumors in a xenograft model,thereby achieving a complete cure rate of 100%at low laser *** results highlight the potential of BCPS nanoplatform for accurate micro-tumor diagnosis and effective tumor therapy.

关键词： theranostic agent clustered SPIO nanoplatform T2 MRI micro-tumor detection photothermal therapy synergetic effect

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Continuous Process Optimization and Computational Fluid Dynamics Simulation of a Methyl Anthranilate Jet Reactor

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China Petroleum Processing & Petrochemical Technology 2023年第2期25卷 128-141页

作者： Chen Zhuohang xu Lin Wang Xiaoping Song Jianhua Long Haoyu Li Xinping Liu Dianhua xu yongjing Chen Hebing Liu Hui Zhang Ying Lei Wei Stake Key Laboratory of Chemical Engineering East China University of Science and TechnologyShanghai 200237China Henan Kaifeng Pingmei Shenma Xinghua Fine Chemical Co. LtdHenan 475003China

Methyl anthranilate(MA)is an important material for the synthesis of sodium saccharin,but the yield and quality of MA are not stable due to the batch operation *** this study,the optimum conditions obtained by an orthogonal test in a batch reactor were a volume ratio of methanol to amide solution of 5:4,volume ratio of sodium hypochlorite to amide solution of 7:4,Hoffmann degradation reaction duration of 10 min,Hoffmann degradation reaction temperature of 10℃,esterification reaction duration of 10 min,and esterification reaction temperature of 40℃.The working flow velocity and allowable working viscosity range of a Venturi ejector inlet were both determined by a computational fluid dynamics(CFD)*** on the above experimental data,the continuous operation of the process was tested in a three-stage continuous reactor,which improved the product yield and quality of the process.

关键词： methyl anthranilate orthogonal test jet reactor CFD

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Viability of all-solid-state lithium metal battery coupled with oxide solid-state electrolyte and high-capacity cathode

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Journal of Energy Chemistry 2024年第4期91卷 122-131页

作者： Xingxing Jiao Xieyu xu yongjing Wang xuyang Wang Yaqi Chen Shizhao Xiong Weiqing Yang Zhongxiao Song Yangyang Liu Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031SichuanChina State Key Laboratory for Mechanical Behavior of Materials Xi'an Jiaotong UniversityXi'an 710049ShaanxiChina Department of Physics Chalmers University of TechnologyGöteborgSE 41296Sweden

Owing to the utilization of lithium metal as anode with the ultrahigh theoretical capacity density of 3860 mA h g^(-1)and oxide-based ceramic solid-state electrolytes(SE),e.g.,garnet-type Li7La_(3)Zr_(2)O_(12)(LLZO),all-state-state lithium metal batteries(ASLMBs)have been widely accepted as the promising alternatives for providing the satisfactory energy density and ***,its applications are still challenged by plenty of technical and scientific *** this contribution,the co-sintering temperature at 500℃is proved as a compromise method to fabricate the composite cathode with structural integrity and declined capacity fading of LiNi_(0.5)Co_(0.2)Mn_(0.3)O_(2)(NCM).On the other hand,it tends to form weaker grain boundary(GB)inside polycrystalline LLZO at inadequate sintering temperature for LLZO,which can induce the intergranular failure of SE during the growth of Li filament inside the unavoidable defect on the interface of ***,increasing the strength of GB,refining the grain to 0.4μm,and precluding the interfacial defect are suggested to postpone the electro-chemo-mechanical failure of SE with weak ***,the advanced sintering techniques to lower the co-sintering temperature for both NCM-LLZO composite cathode and LLZO SE can be posted out to realize the viability of state-of-the-art ASLMBs with higher energy density as well as the guaranteed safety.

关键词： All-solid-state lithium metal battery LiNi_(0.5C)o_(0.2)Mn_(0.3)O_(2)-Li7La_(3)Zr_(2)O_(12)composite cathode Co-sintering Lithium metal anode Electro-chemo-mechanical failure

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Selection of Negative Charged Acidic Polar Additives to Regulate Electric Double Layer for Stable Zinc Ion Battery

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Nano-Micro Letters 2024年第12期16卷 342-356页

作者： Xing Fan Lina Chen yongjing Wang Xieyu xu Xingxing Jiao Peng Zhou Yangyang Liu Zhongxiao Song Jiang Zhou State Key Laboratory for Mechanical Behavior of Materials Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials Science and Engineering Harbin Institute of Technology(Shenzhen)Shenzhen 518055People’s Republic of China Research Institute of Frontier Science Southwest Jiaotong UniversityChengdu 610031People’s Republic of China Hunan Provincial Key Defense Laboratory of High Temperature Wear-Resisting Materials and Preparation Technology Hunan University of Science and TechnologyXiangtan 411201People’s Republic of China School of Instrument Science and Technology Xi’an Jiaotong UniversityXi’an 710049People’s Republic of China School of Materials Science and Engineering Hunan Provincial Key Laboratory of Electronic Packaging and Advanced Functional MaterialsCentral South UniversityChangsha 410083People’s Republic of China

Zinc-ion batteries are promising for large-scale electrochemical energy storage systems,which still suffer from interfacial issues,e.g.,hydrogen evolution side reaction(HER),self-corrosion,and uncontrollable dendritic Zn *** the regulation of electric double layer(EDL)has been verified for interfacial issues,the principle to select the additive as the regulator is still ***,several typical amino acids with different characteristics were examined to reveal the interfacial behaviors in regulated EDL on the Zn *** charged acidic polarity(NCAP)has been unveiled as the guideline for selecting additive to reconstruct EDL with an inner zincophilic H_(2)O-poor layer and to replace H_(2)O molecules of hydrated Zn^(2+)with NCAP *** the synergistic effects of EDL regulation,the uncontrollable interface is significantly stabilized from the suppressed HER and anti-self-corrosion with uniform ***,by adding NCAP glutamate,a high average Coulombic efficiency of 99.83%of Zn metal is achieved in Zn|Cu asymmetrical cell for over 2000 cycles,and NH4V4O10|Zn full cell exhibits a high-capacity retention of 82.1%after 3000 cycles at 2 A g^(-1).Recapitulating,the NCAP principle posted here can quicken the design of trailblazing electrolyte additives for aqueous Zn-based electrochemical energy storage systems.

关键词： Aqueous Zn-ion batteries Zn metal anode Negative charged acidic polar additives Electric double-layer regulation

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焊接规范对药芯焊丝堆焊层耐磨性的影响

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焊接技术 2000年第6期29卷 5-6页

作者：许勇静陈俐武汉交通科技大学湖北武汉430063

2.0药芯焊丝 CO2气体保护焊采用不同的焊接线能量进行施焊，对所焊接头分别做显微硬度试验、金相试验、磨损试验。通过分析比较试验结果发现：焊接线能量大的试样耐磨性好于焊接线能量小的试样，而两个试样的硬度相差不大。本文对此现... 详细信息

2.0药芯焊丝 CO2气体保护焊采用不同的焊接线能量进行施焊，对所焊接头分别做显微硬度试验、金相试验、磨损试验。通过分析比较试验结果发现：焊接线能量大的试样耐磨性好于焊接线能量小的试样，而两个试样的硬度相差不大。本文对此现象进行了分析。

关键词：焊接规范药芯焊丝堆焊层耐磨性

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WSNs中基于可变夹角动态路由的源位置隐私保护方案

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计算机应用研究 2018年第1期35卷 257-260+265页

作者：刘亚许拥晶宋梁上海理工大学光电信息与计算机工程学院计算机科学与工程系上海理工大学上海市现代化光学重点实验室

Spachos等人提出了保护原节点位置隐私的基于夹角的动态路由方案(ADRS),但此方案是对固定夹角区域进行数据传输,不能动态改变夹角给出最优路径。为了进一步增强源节点位置隐私安全,提出动态地改变ADRS中固定夹角的新方案——基于可变夹... 详细信息

Spachos等人提出了保护原节点位置隐私的基于夹角的动态路由方案(ADRS),但此方案是对固定夹角区域进行数据传输,不能动态改变夹角给出最优路径。为了进一步增强源节点位置隐私安全,提出动态地改变ADRS中固定夹角的新方案——基于可变夹角的动态路由方案(VADRS)。该方案通过对每一跳选择最优角度进行数据传输,改进了ADRS的安全性能。实验表明,在不显著增加网络平均端到端延迟下,新方案能够延长网络的平均安全周期,增强源节点位置隐私的安全性。

关键词：无线传感器网络最优角度源位置安全周期

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地方“人才新政”基础性待遇分析——以省会城市为例

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中国人事科学 2019年第5期 77-87页

作者：王勇许永晶温州大学法政学院温州大学马克思主义学院

以省会城市为例,研究其近年来的“人才新政”基础性待遇内容发现,各城市大多分门别类列出了针对各层次人才的吸引政策,包括住房、落户、子女入学和配偶安置、医疗保障等社会保障待遇和专门的经济奖励资助待遇等,体现出向高端人才倾斜、... 详细信息

以省会城市为例,研究其近年来的“人才新政”基础性待遇内容发现,各城市大多分门别类列出了针对各层次人才的吸引政策,包括住房、落户、子女入学和配偶安置、医疗保障等社会保障待遇和专门的经济奖励资助待遇等,体现出向高端人才倾斜、重视吸引青年人才以及量力而行等特点,但各城市在政策文本表述及其具体实施方面,仍应注意提高政策用语的精准性,创新政策文本公共表达方式;经济奖励资助待遇配给必须注重实效,尤应重视对于真正契合本地产业需求的紧缺人才的引进和待遇配给,并以此强化人才政策的地方特色;进一步完善人才社会保障,释减人才的创业负担;处理好政府与市场关系,防止政府职能缺位和错位。

关键词：人才新政基础性待遇经济奖励资助待遇社会保障待遇地方特色

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氟代聚丙烯酸酯乳液的制备及应用

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纺织学报 2008年第8期29卷 81-84页

作者：安秋凤付永山许永静陕西科技大学化学与化工学院陕西西安710021

以(NH4)2S2O8为引发剂,将丙烯酸十二氟庚酯(RfAA)、丙烯酸丁酯(BA)和丙烯酸羟丙酯(HPAA)进行乳液聚合,制备了阴离子氟代聚丙烯酸酯(PAFBA)乳液。用FT-IR对PAFBA膜的结构进行表征,通过扫描电镜(SEM)对PAFBA整理后棉纤维表面的微观形貌进... 详细信息

以(NH4)2S2O8为引发剂,将丙烯酸十二氟庚酯(RfAA)、丙烯酸丁酯(BA)和丙烯酸羟丙酯(HPAA)进行乳液聚合,制备了阴离子氟代聚丙烯酸酯(PAFBA)乳液。用FT-IR对PAFBA膜的结构进行表征,通过扫描电镜(SEM)对PAFBA整理后棉纤维表面的微观形貌进行观察,并对其应用性能进行研究。结果表明:PAFBA可在纤维表面成膜,该膜能使整理后棉织物与水的接触角达到128.0°,静态吸水时间超过6 h;向PAFBA整理液中加入适量醋酸锌,可明显提高整理后棉织物的疏水性能;恒定醋酸锌用量时,PAFBA乳液用量对整理后棉织物的疏水效果亦有影响,其最佳用量为2 g。

关键词：氟代聚丙烯酸酯乳液聚合疏水织物整理

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