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A double crosslinking MXene/cellulose nanofiber layered film for improving mechanical properties and stable electromagnetic interference shielding performance

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Journal of Materials Science & Technology 2022年第34期129卷 127-134页

作者： Shilu Luo Tiantian Xiang Jingwen Dong fengmei su Youxin Ji Chuntai Liu Yuezhan Feng Key Laboratory of Materials Processing and Mold Ministry of Education National Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002China

With the discovery of the two-dimensional(2D) MXene, it shows a great application potential in the field of electromagnetic interference(EMI) shielding, but the mechanical brittleness and easy oxidation of MXene limit its wide application. For this reason, a double crosslinking strategy is provided to solve the above problems in a nacre-like “brick-mortar” layered MXene/cellulose nanofiber(MXene/CNF) ***, the film was firstly suffered by dopamine modification, then was further reinforced by secondary Ca^(2+)bridging, so as to obtain excellent mechanical properties and antioxidative EMI shielding performance. Comparing with the single crosslinking, the double crosslinking strategy reveals a higher efficiency in improving the mechanical property. The mechanical strength and toughness of the double crosslinking MXene/CNF film can increase to 142.2 MPa and 9.48 MJ/m^(3), respectively. More importantly, while achieving good mechanical properties, the MXene composite film still holds a very stable EMI shielding performance of more than 44.6 dB when suffering from the oxidation treatment of hightemperature annealing, showing excellent anti-oxidation ability and environment tolerance. Therefore,this work provides a universal but effective double crosslinking strategy to solve the mechanical brittleness and easy oxidation of MXene-based composites, thus showing a huge potential in flexible EMI shielding applications.

关键词： Ti_(2)C_(3)T_(x)MXene Layered structure Double crosslinking Mechanical properties EMI shielding performance

Rigid POSS Nanofiller Regulated the Interfacial Self-assembly of Particles into 2D Monolayer superlattice with Fixed Interparticle Spacing

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Chinese Journal of Chemistry 2023年第3期41卷 287-293页

作者： Yu Zhao Xiaoyuan Wang Xiaoning Luo Liping Song fengmei su Youju Huang College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhouZhejiang311121 China National Synchrotron Radiation Laboratory CAS Key Laboratory of Soft Matter ChemistryAnhui Provincial EngineeringLaboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of ChinaHefeiAnhui230026 China National Engineering Research Centre for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhouHenan450002 China

Plasmonic superlattices of nanoparticles(NPs)possess unique“surface lattice resonances”properties that facilitates their wide applications in plasmonic sensing,photocatalysis,and nanoscale light ***,it is still challenging to manufacture superlattices with precisely controllable NPs distance and break the size limitation of ***,we provided an effective strategy to construct NPs superlattices via shape-persistent polyhedral oligosilsesquioxane(POSS)molecular nanoparticles govern interfacial *** a nanoscale molecule with diameter of 1.5 nm,the POSS-SH molecule provides sufficient rigid steric hindrance and hydrophobic effect for tailoring the uniformity and controllable distance between NPs in ***,synergistically with hydrophilic ligands of polyethylene glycol(PEG-SH)with optimized ratio,the rigid POSS ligands can effectively regulate the distance between NPs in a fixed range of 2.3—2.8 nm,which is independent of ligands molecular weight and particle ***,the effective approach can be universal to anisotropic NPs for manufacturing monolayer films with high NPs *** believe this nanoscale molecule tailored interfacial self-assembly strategy can effectively break the size of NPs and assembly obstacles for superlattice monolayer ***,the definite distance between NPs in superlattices can minimize optical energy attenuation and facilitates the applications such as surface-enhanced Raman spectroscopy and photocatalysis.

关键词： Polyhedral oligosilsesquioxane Plasmonic superlattices Definite distances Monolayers Nanostructures 2D materials

Engineering miniature gold nanorods with tailorable plasmonic wavelength in NIR region via ternary surfactants mediated growth

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Nano Research 2023年第4期16卷 5087-5097页

作者： Xiaoning Luo Xiaoyuan Wang Lingli Zhang Liping Song Zhiwei sun Yu Zhao fengmei su Youju Huang College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material TechnologyMinistry of EducationHangzhou Normal UniversityHangzhou 311121China National Synchrotron Radiation Laboratory CAS Key Laboratory of Soft Matter ChemistryAnhui Provincial EngineeringLaboratory of Advanced Functional Polymer FilmUniversity of Science and Technology of ChinaHefei 230026China National Engineering Research Centre for Advanced Polymer Processing Technology Zhengzhou UniversityZhengzhou 450002China

Plasmonic nanoparticles are endowed profound capability for sensing,biomedicine,and cancer ***,the inaccessibly adjustable wavelength in near infrared(NIR)region window and size limit for the particles penetration in tumor strongly hinder their *** gold nanorods(mini-Au NRs)with diameter less than 12 nm can effectively address this challenge due to the tiny size and tailorable NIR ***,we adopt ternary surfactants(hexadecyl trimethyl ammonium bromide(CTAB),sodium oleate(NaOL),and sodium salicylate(NaSal))mediated growth strategy to precisely synthesize miniature Au NRs under micelle ***,the selectively dense accumulation of ternary surfactants can efficiently improve the micellar stacking parameters(p)and lower micellar free energy(F),further tends to achieve the formation of Au NRs with tiny diameter and high *** with that of conventional methods,the purity of mini-Au NRs up to 100%can be dramatically improved via varying the relative concentration of ternary *** diameter of Au NRs can be dynamically controlled to 6,8,and 11 nm through regulating the concentration of silver nitrate and the mole ratio of ternary *** ternary surfactants system is favorable for the aging of tiny Au NRs,and further enables the aspect ratio-tunable in the region from 2.70 to 7.32,as well as tailorable plasmonic wavelength in wide NIR window from 700 to 1,147 ***,our findings shed a light on the precise preparation of small sized plasmonic nanoparticles and pave the way to applications in biomedicine,imaging,and cancer therapy.

关键词： miniature gold nanorods ternary surfactants seed mediated growth method near infrared(NIR)region photothermal

航天强国建设新征程背景下“航天工程与材料”校企联合课程教学改革探索

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科技风 2024年第26期 76-78页

作者：苏凤梅刘虎常宝宝宋刚刘春太郑州大学橡塑模具国家工程研究中心河南郑州450002

在航天强国建设的背景下,国家对于工程应用型人才的需求日益增加。“航天工程与材料”是一门研究生专业学位必修课,课程要求学生了解我国航天工程的发展历程、航天器设计的基本内容、航天特因环境对材料的要求以及现代先进航天材料应用... 详细信息

在航天强国建设的背景下,国家对于工程应用型人才的需求日益增加。“航天工程与材料”是一门研究生专业学位必修课,课程要求学生了解我国航天工程的发展历程、航天器设计的基本内容、航天特因环境对材料的要求以及现代先进航天材料应用现状与未来发展趋势等,使学生能够根据材料需求牵引开展研究工作。课程旨在教授基础知识与技能的基础上,引导学生独立思考、提高解决复杂工程问题的能力,培养航天材料工程应用优秀人才。针对传统课堂中的问题,提出了相应的课程改革策略,课程取得了良好的教学效果,显著提高了学生解决工程应用问题的能力。本论文对该门课程在课程内容、上课模式、课程考核方式等方面的教学改革进行了介绍。

关键词：航天工程与材料工程应用校企联合教学改革

Polymer composites designed with 3D fibrous CNT“tracks”achieving excellent thermal conductivity and electromagnetic interference shielding efficiency

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Nano Research 2023年第8期16卷 11411-11421页

作者： Gui Yang Liangchun Zhou Mingjie Wang Tiantian Xiang Duo Pan Jingzhan Zhu fengmei su Youxin Ji Chuntai Liu Changyu Shen National Engineering Research Center for Advanced Polymer Processing Technology The Key Laboratory of Material Processing and Mold of Ministry of EducationCollege of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450002China

The rapid improvement in the running speed,transmission efficiency,and power density of miniaturized devices means that multifunctional flexible composites with excellent thermal management capability and high electromagnetic interference(EMI)shielding performance are urgently ***,inspired by the fibrous pathways of the human nervous system,a“core–sheath”fibers structured strategy was proposed to prepare thermoplastic polyurethane/polydopamine/carbon nanotube(TPU/PDA/CNT)composites film with thermal management capability and EMI shielding ***,TPU@PDA@CNT fibers with CNT shell were prepared by a facile polydopamine-assisted coating on electrospun TPU ***,TPU/PDA/CNT composites with three-dimensional(3D)fibrous CNT“tracks”are obtained by a hot-pressing process,where CNTs distributed on adjacent fibers are compactly *** fabricated TPU/PDA/CNT composites exhibit a high in-plane thermal conductivity(TC)of 9.6 W/(m·K)at low CNT loading of 7.6 wt.%.In addition,it also presents excellent mechanical properties and excellent EMI shielding effectiveness of 48.3 dB as well as multi-source driven thermal management ***,this study provides a simple yet scalable technique to prepare composites with advanced thermal management and EMI shielding performance to develop new-generation wireless communication technologies and portable intelligent electronic devices.

关键词： composites three-dimensional(3D)fibrous carbon nanotube(CNT)“tracks” in-plane thermal conductivity(TC) electromagnetic interference(EMI)shielding multi-source driven thermal management

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

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Nano-Micro Letters 2020年第2期12卷 73-101页

作者： Zonghua Pu Ibrahim Saana Amiinu Ruilin Cheng Pengyan Wang Chengtian Zhang Shichun Mu Weiyue Zhao fengmei su Gaixia Zhang Shijun Liao Shuhui sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1S2Canada State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China The Key Laboratory of Fuel Cell Technology of Guangdong Province The Key Laboratory of New Energy Technology of Guangdong UniversitiesSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Hydrogen,a renewable and outstanding energy carrier with zero carbon dioxide emission,is regarded as the best alternative to fossil *** most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources(e.g.,wind,solar,hydro,and tidal energy).However,the efficiency of water electrolysis is very much dependent on the activity of ***,designing high-effective,stable,and cheap materials for hydrogen evolution reaction(HER)could have a substantial impact on renewable energy ***,single-atom catalysts(SACs)have emerged as a new frontier in catalysis science,because SACs have maximum atom-utilization efficiency and excellent catalytic reaction *** synthesis methods and analytical techniques have been adopted to prepare and characterize these *** this review,we discuss recent progress on SACs synthesis,characterization methods,and their catalytic ***,we highlight their unique electrochemical characteristics toward ***,the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well.

关键词： Single-atom catalysts Nanomaterials Electrocatalyst Hydrogen evolution reaction Electrochemical energy conversion

Vertically Aligned Silicon Carbide Nanowires/Boron Nitride Cellulose Aerogel Networks Enhanced Thermal Conductivity and Electromagnetic Absorbing of Epoxy Composites

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Nano-Micro Letters 2022年第7期14卷 209-227页

作者： Duo Pan Gui Yang Hala MAbo-Dief Jingwen Dong fengmei su Chuntai Liu Yifan Li Ben Bin Xu Vignesh Murugadoss Nithesh Naik Salah MEl-Bahy Zeinhom MEl-Bahy Minan Huang Zhanhu Guo Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People’s Republic of China Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle upon Tyne NE18STUK Integrated Composites Laboratory(ICL) Department of Chemical and Biomolecular EngineeringUniversity of TennesseeKnoxvilleTN 37996USA Advanced Materials Division Engineered Multifunctional Composites(EMC)Nanotech LLCKnoxvilleTN 37934USA College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Mechanical and Manufacturing Engineering Manipal Institute of TechnologyManipal Academy of Higher EducationManipalKarnataka 576104India Department of Chemistry Turabah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry Al-Azhar UniversityNasr CityCairo 11884Egypt

With the innovation of microelectronics technology, the heat dissipation problem inside the device will face a severe test. In this work, cellulose aerogel(CA) with highly enhanced thermal conductivity(TC) in vertical planes was successfully obtained by constructing a vertically aligned silicon carbide nanowires(SiC NWs)/boron nitride(BN) network via the ice template-assisted strategy. The unique network structure of SiC NWs connected to BN ensures that the TC of the composite in the vertical direction reaches 2.21 W m^(-1) K^(-1) at a low hybrid filler loading of 16.69 wt%, which was increased by 890% compared to pure epoxy(EP). In addition, relying on unique porous network structure of CA, EP-based composite also showed higher TC than other comparative samples in the horizontal direction. Meanwhile, the composite exhibits good electrically insulating with a volume electrical resistivity about 2.35 × 10^(11) Ω cm and displays excellent electromagnetic wave absorption performance with a minimum reflection loss of-21.5 dB and a wide effective absorption bandwidth(<-10 dB) from 8.8 to 11.6 GHz. Therefore, this work provides a new strategy for manufacturing polymer-based composites with excellent multifunctional performances in microelectronic packaging applications.

关键词： Epoxy Ice template Vertical alignment Thermal conductivity Multifunctionality

低温等离子体制备与改性纳米催化材料的研究进展

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应用化学 2019年第8期36卷 882-891页

作者：苏风梅张达梁风昆明理工大学真空冶金国家工程实验室昆明650093 昆明理工大学云南省有色金属真空冶金重点实验室昆明650093 昆明理工大学省部共建复杂有色金属资源清洁利用国家重点实验室昆明650093

低温等离子体属于非热平衡等离子体,它具有较高的电子温度和较低的气体温度,是一种纳米催化剂制备与改性的新方法。低温等离子体因其高效、环境友好、材料易实现功能化等特点在制备和改性纳米催化材料方面引起了广泛关注,在纳米催化材... 详细信息

低温等离子体属于非热平衡等离子体,它具有较高的电子温度和较低的气体温度,是一种纳米催化剂制备与改性的新方法。低温等离子体因其高效、环境友好、材料易实现功能化等特点在制备和改性纳米催化材料方面引起了广泛关注,在纳米催化材料的非常规制备、掺杂、缺陷和空位制造中展现了突出的优势,因而被广泛用于各类催化剂的制备与改性中。本文主要综述了低温等离子体在氧还原(ORR)、氧析出(OER)、析氢(HER)和燃料氧化反应(FOR)催化剂制备与改性方面的研究进展,从不同角度阐述了上述各类催化剂性能改善的原因,并对低温等离子体在纳米催化剂制备与改性方面存在的成本相对较高、反应器放大、材料可控制备等挑战进行了总结,最后对等离子体制备与改性纳米催化剂的发展趋势进行了预测。

关键词：低温等离子体纳米材料制备改性催化剂

父权社会下的爱情谬误——《呼啸山庄》与《寒夜》比较阅读

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绥化学院学报 2009年第2期29卷 96-98页

作者：苏凤美绥化学院外国语系黑龙江绥化152061

英国作家艾米莉.勃朗特的《呼啸山庄》和巴金先生的《寒夜》虽然创作背景不同,但都以悲凉的笔调描绘了父权社会下女性的悲剧命运和不幸的爱情。本文用女性主义观点从两部作品的相似性入手,分析了父权社会对女性爱情的摧残,关注了女性被... 详细信息

英国作家艾米莉.勃朗特的《呼啸山庄》和巴金先生的《寒夜》虽然创作背景不同,但都以悲凉的笔调描绘了父权社会下女性的悲剧命运和不幸的爱情。本文用女性主义观点从两部作品的相似性入手,分析了父权社会对女性爱情的摧残,关注了女性被压抑的内心世界,反思了女性在历史文化中的"缺席"。

关键词：父权社会本我缺席