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Gradient layered MXene/Fe_(3)O_(4)@CNTs/TOCNF ultrathin nanocomposite paper exhibiting effective electromagnetic shielding and multifunctionality

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Nano Research 2024年第9期17卷 8233-8242页

作者： Zhengkun Ma Jingzong He Shilin Liu Xiaoxuan Qie Meiheng Gan Ruonan Cheng qilin Wu Malcolm xing State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China College of Chemistry and Chemical Engineering Donghua UniversityShanghai 201620China Department of Mechanical Engineering University of ManitobaWinnipegMB R3T 2N2Canada

As wearable electronic devices are rapidly developing,there is an urgent need for lightweight,flexible,and ultrathin multifunctional electromagnetic interference(EMI)shielding ***,the flexible ultrathin paper that combines efficient shielding and multifunctional integration remains a considerable ***,a novel MXene/Fe_(3)O_(4)@CNTs/TOCNF(MCT,MXene=transition metal carbide/carbonitride,CNTs=carbon nanotubes,TOCNF=TEMPO-oxidized cellulose nanofiber,TEMPO=2,2,6,6-tetramethylpiperidine-1-oxyl radical)nanocomposite paper with a multilayer electromagnetic gradient structure and electromagnetic dual losses was successfully prepared by a simple filtration *** from effective gradient design and adjusting the proportion of TOCNF,the composite paper(only 18μm)exhibits outstanding shielding effectiveness(SE)of 66 dB in the X-band,ultrahigh thickness-specific SE and surface-specific SE values of 3300 dB·mm-1 and 31,428 dB·cm^(2)·g^(-1)***,dehydroxylation treatment improves MCT paper's hydrophobicity,environmental stability,and mechanical strength,expanding its range of ***,the highly efficient Joule heating properties and hydrophobicity provide MCT additional de-icing *** also simulated the electromagnetic shielding effects of MCT composite paper,which was applied in *** study documents an innovative and intriguing material combination,providing a simple and effective manufacturing strategy for developing EMI shielding *** paper is highly suitable for outdoor portable or wearable electronic devices and has significant application potential in humid/severe cold environments.

关键词： cellulose fiber thin papers nanocomposites electromagnetic interference(EMI)shielding

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A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

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Journal of Advanced Ceramics 2024年第7期13卷 1011-1022页

作者： Zheng Liang Han Zhang Yichuan Li Wenkang Zhang Jian Zhou qilin Gu Zhaoxiang Zhong Weihong xing State Key Laboratory of Materials-Oriented Chemical Engineering National Engineering Research Center for Special Separation MembraneNanjing Tech UniversityNanjing 211816China Nanjing Membrane Application Institute Co. Ltd.Nanjing 210009China

Porous ceramics usually require high mechanical strength and maximized porosity simultaneously,while for conventional particle grading strategies,it is highly challenging to meet both *** this end,a reverse particle grading strategy was developed based on the linear packing model by unusually introducing coarse particles(d_(50)=16μm)into a fine particle(d50=5μm)*** the extrusion and sintering process,tubular porous SiC ceramic supports with improved mechanical strength were successfully *** effects of coarse particles on the rheological properties of the ceramic paste and the macroscopic properties and microstructure of the SiC supports were systematically *** an increase in the content of coarse SiC particles to 30 wt%,the pressure generated during extrusion decreased from 5.5±0.2 to 1.3±0.1 ***,the bending strength of the tubular supports increased from 36.6±5.6 to 49.1±4.5 MPa when 20 wt%coarse powder was *** notably improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack ***,the optimized tubular supports had an average pore size of 1.2±0.1μm,an open porosity of 45.1%±1.6%,and a water permeability of 7163±150 L/(m^(2)·h·bar)as well as good alkali and acid corrosion ***,the strategy was proven to be feasible for the scale-up fabrication of 19-channel SiC tubular porous ceramic supports.

关键词： porous SiC ceramic tubular ceramic support reverse particle grading reaction bonding chemical stability

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Design of High-Contrast Mechanochromic Materials Based on Aggregation-Induced Emissive Pyran Derivatives Guided by Polymorph Predictions

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CCS Chemistry 2022年第3期4卷 899-909页

作者： Wen Wang Ruohan Li Shuzhang Xiao qilin xing Xia Yan Jiayu Zhang xinghong Zhang Haichuang Lan Tao Yi College of Biological and Pharmaceutical Sciences China Three Gorges UniversityHubeiYichang 443002 Department of Chemistry Fudan UniversityShanghai 200438 State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620

High-contrast mechanochromic(MC)materials are prominent candidates for sensor,security,and memory applications;however,the development of materials with a large luminescence change(Δλem>100 nm)under external stimuli is *** that polymorphic molecules usually exhibit reversible mechanochromism,polymorph prediction is adopted for thefirst time to guide the design of high-contrastMC materials in this *** designed and synthesized a series of donor–π–acceptor pyran derivatives bearing different electron donors and acceptors as model *** polymorph prediction indicated that 4-dicyanomethylene-2,6-distyryl-4H-pyran and 4H-pyran-4-one derivatives had the potential to crystallize in both monomer andπ-dimer aggregates,while barbituric acid-based compound tended to pack tightly in all aggregated *** experimental results agreed well with the prediction that the derivatives potentially possessing both monomer andπ-dimer aggregate structures exhibit excellent MC behavior,whereas the fluorescence difference for the barbituric acid-based compounds is ***,a compound with an excellent fluorescence difference of three colors during reversible mechanochromism was chosen as the candidate for an optical recording material and security *** work proposes an effective method to guide the design of stimuli-responsive materials,which may open promising avenues for the development of high-contrast MC molecules.

关键词： mechanochromism fluorescence AIE high-contrast polymorph prediction

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Cucurbit[7]uril confined phenothiazine bridged bis(bromophenyl pyridine)activated NIR luminescence for lysosome imaging

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Chinese Chemical Letters 2024年第6期35卷 288-292页

作者： Hui-Juan Wang Wen-Wen xing Zhen-Hai Yu Yong-Xue Li Heng-Yi Zhang qilin Yu Hongjie Zhu Yao-Yao Wang Yu Liu College of Chemistry State Key Laboratory of Elemento-Organic ChemistryNankai UniversityTianjin 300071China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical EngineeringLiaocheng UniversityLiaocheng 252000China Key Laboratory of Molecular Microbiology and Technology College of Life SciencesNankai UniversityTianjin 300071China

Macrocycle confinement induced guest near-infrared(NIR)luminescence was research hotspot *** in,we reported a cucurbit[7]uril(CB[7])confined 3,7-bis((E)-2-(pyridin-4-yl)vinyl)-10-Hphenothiazine bridged bis(4-(4-bromophenyl)pyridine)(G),which not only boosted its NIR luminescence but also realized detection of HClO/ClO^(-)in living cells and lysosome *** spectroscopy experiments were performed to calculate the detection ability of probe G to HClO/ClO^(-)up to 147 nmol/*** compared with G,supramolecular probe G■CB[7]formed after encapsulated by CB[7],the detection ability towards HClO/ClO^(-)was improved to 24 nmol/L which was ascribe to the macrocycle CB[7]confinement increasing the fluorescence intensity to 103 *** the excitation wavelength changing,the fluorescence red-shifted to 820 nm when excited by 570 nm light,which was used to NIR lysosome ***,the supramolecular assembly G■CB[7]was also successfully used to highly sense to exogenous HClO/ClO^(-)in RAW 264.7 cells and live animal.

关键词： Phenothiazine Supramolecular assembly Macrocycle confined Probe HClO/ClO^(-)

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Effects of the original state of sodium-based additives on microstructure,surface characteristics and filtration performance of SiC membranes

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Chinese Journal of Chemical Engineering 2023年第11期63卷 1-11页

作者： Yuling Xie qilin Gu Qian Jiang Zhaoxiang Zhong Weihong xing National Engineering Research Center for Special Separation Membrane State Key Laboratory of Materials-Oriented Chemical EngineeringCollege of Chemical EngineeringNanjing Tech UniversityNanjing 210009China School of Environmental Science and Engineering Nanjing Tech UniversityNanjing 211816China

Sodium-contained compounds are promising sintering additives for the low-temperature preparation of reaction bonded SiC *** sodium-based sintering additives in various original states were attempted,their effects on microstructure and surface properties have rarely been *** this work,three types of sodium-based additives,including solid-state NaA zeolite residue(NaA)and liquidstate dodecylbenzene sulfonate(SDBS)and water glass(WG),were separately adopted to prepare SiC membranes,and the microstructure,surface characteristics and filtration performance of these SiC membranes were comparatively *** showed that the SiC membranes prepared with liquid-state SDBS and WG(S-SDBS and S-WG)showed lower open porosity yet higher bending strength compared to those prepared with solid-state NaA(S-NaA).The observed differences in bending strength were further interpreted by analyzing the reaction process of each sintering additive and the composition of the bonding phase in the reaction bonded SiC ***,the microstructural differentiation was correlated to the original state of the *** addition,their surface characteristics and filtration performance for oil-in-water emulsion were examined and correlated to the membrane *** S-NaA samples showed higher hydrophilicity,lower surface roughness(1.80μm)and higher rejection ratio(99.99%)in O/W emulsion separation than those of S-WG and *** can be attributed to the smaller mean pore size and higher open porosity,resulting from the originally solid-state NaA ***,this work revealed the comprehensive effects of original state of sintering additives on the prepared SiC membranes,which could be helpful for the application-oriented fabrication by choosing additives in suitable state.

关键词： SiC membrane Sintering additive Reaction sintering Microstructure Oil-in-water emulsions

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基于烷氧基侧链工程的聚电解质设计及离子异质结半导体纤维

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中国科学：化学 2024年第4期54卷 654-666页

作者：邢毅张靖灵樊纯宇吴琪琳孙恒达冯良文王刚朱美芳东华大学材料科学与工程学院东华大学纤维材料改性国家重点实验室上海201620 四川大学化学学院绿色化学与技术教育部重点实验室成都610064

一维离子-电子器件具有尺寸小、集成能力强的独特优势,但在环境温度下的低离子迁移率限制了其在生物集成电子领域的应用能力.本文通过侧链工程在传统咪唑基离子液体中引入烷氧基,并与聚乙二醇甲基丙烯酸酯(poly(ethylene glycol)methacr... 详细信息

一维离子-电子器件具有尺寸小、集成能力强的独特优势,但在环境温度下的低离子迁移率限制了其在生物集成电子领域的应用能力.本文通过侧链工程在传统咪唑基离子液体中引入烷氧基,并与聚乙二醇甲基丙烯酸酯(poly(ethylene glycol)methacrylate,PEGMA)共聚,合成了低玻璃化转变温度(glass-transition temperature,Tg)的聚阳离子电解质poly(VIM-m-TFSI),在室温下实现了更高的链迁移率,显示出更低的离子阻抗和更宽的电化学窗口(-2.7~+2.7 V).与聚阴离子电解质poly(AMPS-EMIM)简单贴合,构筑了高性能全柔性离子异质结,实现了整流比为127的固态离子二极管.设计合成的两种聚电解质溶液表现出优异的溶液可加工性和流变性能,可直接用作3D打印油墨.最终,通过3D打印技术实现了离子异质结半导体纤维的一体化成型构筑,获得了基于5×5阵列单元的大面积半导体纤维纺织品,初步实现了输入信号的“0-1”整流,验证了离子异质结半导体纤维在织物逻辑电路领域的应用潜力.

关键词：聚离子液体侧链工程烷氧基 3D打印离子异质结半导体纤维

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旅游公路景观绿化工程规划设计分析

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建设科技 2024年第5期 79-81页

作者：陈奇琳胡亮邢婷柯晓禹东山县交通综合服务中心漳州363400 中国公路工程咨询集团有限公司北京100000

近几年来,伴随经济的飞速发展以及社会的不断进步,人们生活质量不断提高,对旅游公路设计也提出了新的要求。相关部门及工作人员应当提高重视度,结合游客需求进行合理的规划和设计,以便于将公路服务与生态环境相融合的设计效益充分发挥... 详细信息

近几年来,伴随经济的飞速发展以及社会的不断进步,人们生活质量不断提高,对旅游公路设计也提出了新的要求。相关部门及工作人员应当提高重视度,结合游客需求进行合理的规划和设计,以便于将公路服务与生态环境相融合的设计效益充分发挥出来。基于此,本文以东山生态环岛公路西浦湾段道路工程为例,对旅游公路景观绿化工程规划设计予以研究和分析,以供参考。

关键词：旅游公路景观绿化工程规划设计

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不同类型铝硅镀层热成型钢的耐蚀性研究

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电镀与涂饰 2024年第5期43卷 112-120页

作者：陈磊陈麒琳邢阳周万权张海均李文炎广州汽车集团股份有限公司汽车工程研究院广东广州511434

[目的]铝硅镀层热成型钢的镀层厚度对其防腐性能影响较大,有必要对汽车上使用的铝硅镀层热成型常规镀层板(镀层厚度20~33μm)、薄镀层板(镀层厚度6~14μm)及变厚度板的耐蚀性进行比较。[方法]采用中性盐雾(NSS)试验对热成型前后试样的... 详细信息

[目的]铝硅镀层热成型钢的镀层厚度对其防腐性能影响较大,有必要对汽车上使用的铝硅镀层热成型常规镀层板(镀层厚度20~33μm)、薄镀层板(镀层厚度6~14μm)及变厚度板的耐蚀性进行比较。[方法]采用中性盐雾(NSS)试验对热成型前后试样的耐蚀性进行考察。[结果]热成型前,常规镀层板在NSS试验1109 h时才出现红锈,薄镀层板在283 h后便出现红锈,变厚度板薄区618 h后出现红锈;热成型及电泳后,常规镀层板和薄厚度板的单边扩蚀宽度分别为0 mm和4.0 mm,变厚度板上基板厚度为2.3、2.0和1.8 mm的区域的单边扩蚀宽度分别为0.5、2.0和2.0 mm。[结论]热成型前,铝硅镀层板的耐蚀性与镀层的表面层隔离作用有关;热成型及电泳后,镀层的扩散层厚度对腐蚀的影响较大,变厚度板的防腐性能较薄镀层板好,但比常规镀层板差。

关键词：薄镀层铝硅钢板变厚度板盐雾腐蚀试验扩蚀宽度

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Regulation of FN1 degradation by the p62/SQSTM1-dependent autophagy-lysosome pathway in HNSCC

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International Journal of Oral Science 2020年第4期12卷 327-337页

作者： Xinchen Liu Lin Meng xing Li Daowei Li qilin Liu Yumeng Chen Xiangwei Li Wenhuan Bu Hongchen Sun Department of Oral Biology Jilin Provincial Key Laboratory of Tooth Development and Bone RemodelingSchool and Hospital of StomatologyJilin UniversityChangchunChina Department of Endodontics School and Hospital of StomatologyJilin UniversityChangchunChina Department of Pathology School and Hospital of StomatologyJilin UniversityChangchunChina School and Hospital of Stomatology China Medical UniversityShenyangChina

Epithelial–mesenchymal transition(EMT)is involved in both physiological and pathological *** plays an essential role in the invasion,migration and metastasis of *** has been shown to regulate EMT in a variety of cancers but not in head and neck squamous cell carcinoma(HNSCC).Herein,we investigated whether autophagy also regulates EMT in *** of clinical data from three public databases revealed that higher expression of fibronectin-1(FN1)correlated with poorer prognosis and higher tumour pathological grade in *** from SCC-25 cells demonstrated that rapamycin and Earle’s balanced salt solution(EBSS)promoted autophagy,leading to increased FN1 degradation,while 3-methyladenine(3-MA),bafilomycin A1(Baf A1)and chloroquine(CQ)inhibited autophagy,leading to decreased FN1 *** the other hand,autophagic flux was blocked in BECN1 mutant HNSCC Cal-27 cells,and rapamycin did not promote autophagy in Cal-27 cells;also in addition,FN1 degradation was ***,we identified FN1 degradation through the lysosome-dependent degradation pathway using the proteasome inhibitor *** from immunoprecipitation assays also showed that p62/SQSTM1 participated as an autophagy adapter in the autophagy–lysosome pathway of FN1 ***,data from immunoprecipitation assays demonstrated that the interaction between p62 and FN1 was abolished in p62 mutant MCF-7 and A2780 cell *** results indicate that autophagy significantly promotes the degradation of ***,our findings clearly suggest that FN1,as a marker of EMT,has adverse effects on HNSCC and elucidate the autophagy–lysosome degradation mechanism of FN1.

关键词： inhibited invasion FN1

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Competitive Expression of Endogenous Wheat CENH3 May Lead to Suppression of Alien ZmCENH3 in Transgenic Wheat × Maize Hybrids

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Journal of Genetics and Genomics 2015年第11期42卷 639-649页

作者： Wei Chen qilin Zhu Haiyan Wang Jin Xiao Liping xing Peidu Chen Weiwei Jin Xiu-E.Wang State Key Laboratory of Crop Genetics and Germplasm Enhancement Cytogenetics InstituteNanjing Agricultural University/JCIC-MCP National Maize Improvmental Center China Agricultural University

Uniparental chromosome elimination in wheat × maize hybrid embryos is widely used in double haploid production of wheat. Several explanations have been proposed for this phenomenon, one of which is that the lack of cross-species CENH3 incorporation may act as a barrier to interspecies hybridization. However, it is unknown if this mechanism applies universally. To study the role of CENH3 in maize chromosome elimination of wheat x maize hybrid embryos,？cos, maize ZmCENH3 and wheat aTaCENH3-B driven by the constitutive CaMV35S promoter were transformed into wheat variety Yangmai 158. Five transgenic lines for ZmCENH3 and six transgenic lines for ctTaCENH3-B were identified. RT-PCP analysis showed that the transgene could be transcribed at a low level in all ZmCENH3 transgenic lines, whereas transcription of endogenous wheat CENH3 was significantly up-regulated. Interestingly, the expression levels of both wheat CENH3 and ZmCENH3 in the ZmCENH3 transgenic wheat × maize hybrid embryos were higher than those in the non-transformed Yangmai 158 × maize hybrid embryos. This indicates that the alien ZmCENH3 in wheat may induce competitive expression of endogenous wheat CENH3, leading to suppression of ZmCENH3 over-expression. Eliminations of maize chromosomes in hybrid embryos of ZmCENH3 transgenic wheat ×maize and Yangmai 158 x maize were compared by observations on micronuelei presence, by marker analysis using maize SSRs （simple sequence repeats）, and by FISH （fluorescence in situ hybridization） using 45S rDNA as a probe. The results indicate that maize chromosome elimination events in the two crosses are not sigmficantly different. Fusion protein ZmCENH3- YFP could not be detected in ZmCENH3 transgenic wheat by either Western blotting or immnunostaining, whereas accumulation and loading of the αTaCENH3-B-GFP fusion protein was normal in aTaCENH3-B transgenic lines. As ZmCENH3-YFP did not accumulate after AM114 treatment, we speculate that low levels of ZmCENH3 protein in

关键词： CENH3 Transgenic wheat Uniparental chromosome elimation Triticum aestivura Zea mays

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