检索结果-内蒙古大学图书馆

Flexible micro-perforated panels prepared by CNC machining

IOP Conference Series: Earth and Environmental Science 2019年第4期358卷

作者： Dongyue Xie Xiaoning Tang Ming Hu Deyi Kong Yujie Qian Hefei University of Technology Hefei 230601 China State Key Laboratory Cultivation Base for New Textile Materials and Advanced Processing Technology School of Textile Science and Engineering Wuhan Textile University Wuhan 430200 China State Key Laboratory of Transducer Technology Key Laboratory of Biomimetic Sensing and Advanced Robot Technology of Anhui Province Institute of Intelligent Machines Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 China IOT Engineering College Hohai University Changzhou 213022 China

With the advantages of light weight, thin thickness and environment friendly, the micro-perforated panel (MPP) has been widely studied for noise reduction. Maa's model pointed out that the MPP could obtain higher sound absorption over broader frequency band when the perforations were reduced to less than 100 μm. However, it is challenging to manufacture MPPs with the aperture of approximate 100 μm, thus its potential application has been restricted. In this study, we used a computer numerical control (CNC) milling machine to process MPP. Four different kinds of raw materials including paperboard, polyethylene terephthalate (PET), polyvinyl chloride (PVC), and polycarbonate (PC) were taken to prepare micro-perforated panels (MPPs). It has been indicated that MPPs with good sound absorption properties were successfully prepared by this facile method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Surface Modification and Adhesion Properties of Meta-aramid Fabrics

Surface Modification and Adhesion Properties of Meta-aramid ...

引用

textile Bioengineering and Informatics Symposium Proceedings

作者： Bing-Qian Liu Dan Sheng Xing Gan Gen-Yang Cao State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University College of Textile and Garment Jiangnan University

Meta-aramid fibers are widely used in military and industrial fields. However, they are difficult to dye and bond with substrates. In this work, an N,N-dimethylacetamide(DMAc)-ethanol-water system was used to modify the surface of meta-aramid fabrics, and activated carbon was used to prepare a paste that is printed on the surface. The wetting property was studied using a contact angle tester. The wetting property of the meta-aramid fabric after modification largely improved after treatment with DMAc: ethanol: water mass ratios of 4:5:1 and 9:0.5:0.5. The adhesion properties were comprehensively studied via scanning electron microscopy observations of the printed fabrics and through testing the adhesive strength of the fabrics. The results show that the content of the active carbon coated on the modified fiber surface increased as predicted and that the adhesive strength of the modified fabrics increased by approximately 50%, suggesting significant improvement in the adhesion properties of the meta-aramid fabrics. Additionally, the thermal properties of the modified meta-aramid fabrics were studied by thermogravimetric analysis. The thermal analysis reveals that the thermal stability of the meta-aramid fabric decreased after treatment with the DMAc-ethanol-water system. Furthermore, the breaking strength of the meta-aramid fiber decreased by approximately 10% after modification.

关键词： Meta-aramid Fabrics DMAc-ethanol-water System Surface Modification Adhesion Properties

来源：评论

学校读者我要写书评

暂无评论

Impact of inherent energy barrier on spin-orbit torques in magnetic-metal/semimetal heterojunctions

arXiv

引用

arXiv 2019年

作者： Gao, Tenghua Qaiumzadeh, Alireza Troncoso, Roberto E. Haku, Satoshi An, Hongyu Nakayama, Hiroki Tazaki, Yuya Zhang, Song Tu, Rong Asami, Akio Brataas, Arne Ando, Kazuya Keio Institute of Pure and Applied Science Keio University Yokohama223-8522 Japan Department of Applied Physics and Physico-Informatics Keio University Yokohama223-8522 Japan State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan China Center for Quantum Spintronics Department of Physics Norwegian University of Science and Technology TrondheimNO-7491 Norway School of Engineering and Sciences Universidad Adolfo Ibáñez Santiago Chile College of New Materials and New Energies Shenzhen Technology University Shenzhen518118 China Center for Spintronics Research Network Keio University Yokohama223-8522 Japan

Spintronic devices are based on heterojunctions of two materials with different magnetic and electronic properties. Although an energy barrier is naturally formed even at the interface of metallic heterojunctions, its impact on spin transport has been overlooked. Here, using diffusive spin Hall currents, we provide evidence that the inherent energy barrier governs the spin transport even in metallic systems. We find a sizable field-like torque, much larger than the damping-like counterpart, in Ni81Fe19/Bi0.1Sb0.9 bilayers. This is a distinct signature of barrier-mediated spin-orbit torques, which is consistent with our theory that predicts a strong modification of the spin mixing conductance induced by the energy barrier. Our results suggest that the spin mixing conductance and the corresponding spin-orbit torques are strongly altered by minimizing the work function difference in the heterostructure. These findings provide a new mechanism to control spin transport and spin torque phenomena by interfacial engineering of metallic heterostructures. Copyright © 2019, The Authors. All rights reserved.

关键词： Heterojunctions

来源：评论

学校读者我要写书评

暂无评论

Construction and Performance of Silk Fibroin Powder/polysulfone Composite Membrane

Construction and Performance of Silk Fibroin Powder/polysulf...

引用

textile Bioengineering and Informatics Symposium Proceedings

作者： Jing-Jing Huang Ying-Ying Yang Can-Hong Xu Yi-Ming Bu Hong-Jun Yang Shao-Jin Gu State Key Laboratory Breeding Base of New Textile Materials and Advanced Processing Technologies School of Materials Science and Engineering Wuhan Textile University

PSF/silk fibroin(SF) powder composite membranes with different SF contents were prepared by an immersionprecipitation phase transformation method. The results show that silk fibroin(SF) powder has a good dispersion in the PSF matrix. The changes of infrared spectra, surface morphology, contact Angle, water absorption,mechanical properties and water flux were studied. The infrared results demonstrate that there was no new functional group between the silk powder and polysulfone, indicating that there was no chemical interaction between the fibroin and polysulfone. The scanning electron microscopy showed that as the content of silk increased, the micropores in the blend film also increased, and the continuous phase of the blend membrane was destroyed. After adding the silk fibroin, the hydrophilicity of the polysulfone membrane was improved.

关键词： Polysufone Silk Fibroin Powder Composite Membranes

来源：评论

学校读者我要写书评

暂无评论

Flexural Behaviour of the Foam Sandwiched Composite Panels based on Finite Element Analyses

Flexural Behaviour of the Foam Sandwiched Composite Panels b...

引用

textile Bioengineering and Informatics Symposium Proceedings

作者： Lv-Tao Zhu Xi-Nuo Zou Cheng-Yan Zhu College of Materials and Textiles Zhejiang Sci-Tech University Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education State Key Laboratory for Hubei New Textile Materials and Advanced Processing Technology Wuhan Textile University Key Laboratory of Eco-textiles Ministry of Education Jiangnan University

In the current studies, the flexural behaviour of foam sandwiched composite was investigated experimentally and numerically. Flexural tests were performed using a Material testing system(MTS810.23). The FE(finite element) software and the ABAQUS/Standard was employed to simulate the flexural properties of foam sandwiched composites. A crushable foam model was used to explore core behaviors, while the Hashin criteria were used to predict the failure of the face sheets. The contact load histories, deflection, and peak load were obtained to compare the numerical and experimental results at the same load condition. The comparisons illustrated the existence of a good agreement between the experimental and FEM results.

关键词： Foam Sandwiched Composites Flexural Behaviour Finite Element Analyses Absorbed Energy Failure Mode

来源：评论

学校读者我要写书评

暂无评论

Regio-Regular Polymer Acceptors Enabled by Determined Fluorination on End Groups for All-Polymer Solar Cells with 15.2 % Efficiency

引用

Angewandte Chemie 2021年第18期133卷

作者： Han Yu Mingao Pan Rui Sun Indunil Agunawela Dr. Jianquan Zhang Yuhao Li Zhenyu Qi Han Han Xinhui Zou Wentao Zhou Dr. Shangshang Chen Dr. Joshua Yuk Lin Lai Siwei Luo Dr. Zhenghui Luo Prof. Dahui Zhao Prof. Xinhui Lu Prof. Harald Ade Prof. Fei Huang Prof. Jie Min Prof. He Yan The Institute for Advanced Studies Wuhan University Wuhan 430072 China Hong Kong University of Science and Technology–Shenzhen Research Institute No. 9 Yuexing 1st RD Hi-tech Park Nanshan Shenzhen 518057 China Department of Chemistry Guangdong-Hong Kong-Macao Joint Laboratory of Optoelectronic and Magnetic Functional Materials Energy Institute and Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration & Reconstruction Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong China Department of Physics and Organic and Carbon Electronics Laboratories (ORaCEL) North Carolina State University Raleigh NC 27695 USA Department of Physics Chinese University of Hong Kong New Territories Hong Kong 999077 China Beijing National Laboratory for Molecular Sciences Centre for Soft Matter Science and Engineering Key Lab of Polymer Chemistry & Physics of the Ministry of Education College of Chemistry Peking University Beijing 100871 China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China Key Laboratory of Materials Processing and Mold Zhengzhou University Ministry of Education 450002 Zhengzhou China

Polymerization sites of small molecule acceptors (SMAs) play vital roles in determining device performance of all-polymer solar cells (all-PSCs). Different from our recent work about fluoro- and bromo- co-modified end group of IC-FBr (a mixture of IC-FBr1 and IC-FBr2), in this paper, we synthesized and purified two regiospecific fluoro- and bromo- substituted end groups (IC-FBr- o & IC-FBr- m ), which were then employed to construct two regio-regular polymer acceptors named PYF-T- o and PYF-T- m , respectively . In comparison with its isomeric counterparts named PYF-T- m with different conjugated coupling sites, PYF-T- o exhibits stronger and bathochromic absorption to achieve better photon harvesting. Meanwhile, PYF-T- o adopts more ordered inter-chain packing and suitable phase separation after blending with the donor polymer PM6, which resulted in suppressed charge recombination and efficient charge transport. Strikingly, we observed a dramatic performance difference between the two isomeric polymer acceptors PYF-T- o and PYF-T- m . While devices based on PM6:PYF-T- o can yield power conversion efficiency (PCE) of 15.2 %, devices based on PM6:PYF-T- m only show poor efficiencies of 1.4 %. This work demonstrates the success of configuration-unique fluorinated end groups in designing high-performance regular polymer acceptors, which provides guidelines towards developing all-PSCs with better efficiencies.

关键词： all-polymer solar cells fluorinated end group isomeric effect organic solar cells polymer acceptors

来源：评论

学校读者我要写书评

暂无评论

Corrigendum to ‘In-situ synthesis, operation and regeneration of nanoporous silver with high performance toward oxygen reduction reaction’ [Nano Energy, 58 (2019) 69–77]

引用

Nano Energy 2019年 66卷

作者： Wei Zhao Kai Huang Qinghua Zhang Hui Wu Lin Gu Kefu Yao Yang Shen Yang Shao Key Laboratory for Advanced Materials Processing Technology School of Materials Science and Engineering Tsinghua University Beijing 100084 China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China Institute of Physics Chinese Academy of Science Beijing National Laboratory of Condensed Matter Physics Beijing 100190 China

来源：评论

学校读者我要写书评

暂无评论

The Effect of Dissolution Conditions on the Structure and Properties of Regenerated Antheraea Pernyi Silk Fibroin

The Effect of Dissolution Conditions on the Structure and Pr...

引用

The 10th textile Bioengineering and Informatics Symposium (TBIS 2017)

作者： Lu-Ping Wang Jie Zhang Yu-Hang Guo Yan-Fei Feng Qiang Zhang Ren-Chuan You State Key Laboratory of New Textile Materials and Advanced Processing Technologies College of Textile Science and EngineeringWuhan Textile University

In this study,the Antheraea pernyi silk fibroin(ASF) was dissolved in Ca(NO3)2 solution with different dissolution temperature and times,and the effects of the dissolution conditions on the solubility,molecular weight,and mechanical properties of regenerated ASF film were *** solubility was significantly dependent on the dissolution temperature and *** extending dissolution time and increasing temperature induced the degradation of ASF chain,making molecular weight ***,the strength of regenerated ASF films significantly decreased with the extending dissolution time and increasing dissolution temperature,indicating that a mild dissolution process that induces less degradation of the ASF chain is indispensable to achieve the ASF-based materials with a high mechanical *** optimal dissolution temperature and time are 90 °C and 4 h respectively.

关键词： Antheraea Pernyi Silk Fibroin Regeneration Dissolution Molecular Weight Mechanical Properties

来源：评论

学校读者我要写书评

暂无评论

Upconversion 32Nb_(2)O_(5)-10La_(2)O_(3)-16ZrO_(2) glass activated with Er^(3+)/Yb^(3+) and dye sensitized solar cell application

引用

Journal of advanced Ceramics 2017年第4期6卷 312-319页

作者： Xiaoyu LI Jiaying LI Jianqiang LI Hong LIN Bo LI National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology Key Laboratory of Green Process and EngineeringInstitute of Process EngineeringChinese Academy of SciencesBeijing 100190China Advanced Materials Institute Graduate School at ShenzhenTsinghua UniversityShenzhenGuangdong 518055China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of New Ceramics and Fine Processing Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

Er^(3+)/Yb^(3+)codoped niobium pentoxide glasses were fabricated by the aerodynamic levitation(ADL)method with rapid cooling *** samples with various doping concentrations showed good upconversion luminescence properties under 980 nm laser *** structure,transmittance spectrum,and luminescence properties of the samples were systemically investigated by XRD,UV-Vis-NIR spectrophotometer,and upconversion *** transparent samples exhibited green and red upconversion emissions centered at 532,547,and 670 *** results showed that the sample codoped with 1 mol%Er^(3+)/Yb^(3+)has the strongest upconversion emissions,and the increase of the doped Yb^(3+)concentration results in the increased red emission and reduced green *** logI-logP plot of green emission indicated that the green emissions reach the saturation at high pump power excitation,deviating from the low-power *** one-photon energy transfer(ET)process,^(4)I_(11/2)+^(4)I_(11/2)→^(4)F_(7/2)+^(4)I_(15/2) process between the two neighboring Er^(3+)ions was responsible for the population of the 4S3/2/4H11/2 *** niobium pentoxide codoped with Er^(3+)/Yb^(3+)bulk glasses could be used in the dye sensitized solar cell(DSSC)to improve the efficiency.

关键词： aerodynamic levitation(ADL) niobium pentoxide upconversion rare earth concentration solar cell

来源：评论

学校读者我要写书评

暂无评论

Super Dye Adsorption Capability of Natural Superfine Down Particles Derived from Solid Wastes

Super Dye Adsorption Capability of Natural Superfine Down Pa...

引用

textile Bioengineering and Informatics Symposium Proceedings

作者： Feng-Xiang Chen Hui-Yu Yang Ya-Ling Wang Xin Liu Wei-Lin Xu Beijing Advanced Innovation Center for Biomedical Engineering and Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry Beihang University State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University

Natural superfine down particles(NSDP) were successfully prepared and evaluated as an efficient adsorbent for the removal of acid brilliant scarlet 3R, direct fast scarlet 4BS and vat scarlet R from aqueous solution. The adsorbent was characterized by scanning electron microscopy(SEM), N2 adsorption and Fourier transform infrared(FTIR) spectroscopy. The adsorption behavior of NSDP for these three dyes was investigated as a function of *** results showed that the NSDP surface has an abundance of functional groups(carboxyl, hydroxyl and aminegroups). The adsorption capacity of NSDP was strongly pH-dependent. The maximum absorption capacity of the dyes onto the NSDP was observed at pH 3(108.84, 87.06, and 67.51mg/g). The results indicated that NSDP can be used as an efficient and economic adsorbent to remove dyes in the textile effluents.

关键词： Natural Superfine Down Particle textile Wastewater Dye Ddsorption pH

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：