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Journal of Donghua University(English Edition) 2017年第6期34卷 768-773页

作者：王碧峤张佩华赵莉何晨光 College of Textile and Clothing Dezhou UniversityDezhou 253023China College of Textiles Donghaa UniversityShanghai 201620China Shanghai Jurui Biomaterials Limited Company Shanghai 200241China

Hydrogen peroxide( H_2O_2) is applied for surface modification of polyglycolic acid( PGA) fibers in order to enhance the hydrophilicity and cytocompatibility of PGA fibers effectively,and maintain the breaking strength as the same time. PGA fibers are dipped in H_2O_2 solution a certain time for modification. Scanning electron microscopy( SEM) was used to observe the surface morphology of PGA fibers before and after modification. The varying of PGA macromolecule was examined with Fourier transform infrared spectroscopy( FTIR) analyses. X-ray diffraction( XRD) and differential scanning calorimetry( DSC) analysis showed that crystallinity slightly decreases. Mechanical performance test showed tensile force of modified PGA fiber was increased. The water contact angle test indicated the improving of hydrophilic. A cell proliferation assay showed that fibroblast cells attach and proliferate well on the fibers, which meant the modified fibers possess good cytocompatibility. These results suggest that H_2O_2 surface modification is easy to operate and a advantageous modification method for PGA fibers.

关键词： polyglycolic acid(PGA) hydrogen peroxide(H2O2) surface modification hydrophilicity cytocompatibility

Nondestructive visualization of graphene on Pt with methylene blue surface modification

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Science China Materials 2022年第10期65卷 2763-2770页

作者： He Kang Yanhui Zhang Yun Wu Shike Hu Jing Li Zhiying Chen Yanping Sui Shuang Wang Sunwen Zhao Runhan Xiao Guanghui Yu Songang Peng Zhi Jin Xinyu Liu State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Science and Technology on Monolithic Integrated Circuits and Modules Laboratory Nanjing Electronic Device InstituteNanjing 210016China Microwave Devices and Integrated Circuits Department Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029China

Efficient large-scale nondestructive quality assessment of graphene on Pt is essential to the in-depth growth research and practical applications of ***,we present a very simple method for directly observing the domains and defects in graphene on Pt using an ordinary optical *** was achieved by modifying graphene on Pt using methylene blue(MB).Because the chemical activities of graphene and Pt surface differ significantly,the adsorption and reaction of MB on graphene and platinum surface *** can determine the distribution of graphene crystal domains and defects by comparing the colors in the optical *** addition,this characterization method causes no obvious damage to the Pt substrate and ***,it does not affect the recycling of the substrate or the subsequent characterization or application of *** study provides a nondestructive method for measuring the quality of graphene on Pt on a large scale,as well as a reference for the characterization and doping of other two-dimensional materials.

关键词： graphene Pt nondestructive visualization surface modification methylene blue

A ONE-STEP surface modification PROCEDURE TO PEG-GRAFTED NANO-TITANIA

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Chinese Journal of Polymer Science 2007年第3期25卷 291-296页

作者：郭朝霞 Institute of Polymer Science and Engineering Department of Chemical EngineeringSchool of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

PEG （Polyethylene Glycol）-grafted nano-titania has been obtained in a one-step procedure using hexamethylene diisocyanate as the coupling agent and dibutyltin dilaurate as the catalyst in toluene at 80℃ and characterized qualitatively by FTIR and quantitatively by elemental analysis and thermogravimetric analysis. A comparison of nano-titania with two other commonly used inorganic nanoparticles, nano-silica and nano-alumina, is made, revealing that reactivity order is nano- silica 〉 nano-alumina 〉 nano-titania in view of PEG grafting. Possible mechanism of PEG grafting is also discussed.

关键词： Nano-titania PEG Hexamethylene diisocyanate surface modification

Effects of filler loading and surface modification on electrical and thermal properties of epoxy/montmorillonite composite

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Chinese Physics B 2018年第11期27卷 332-339页

作者： Zi-Rui Jia Zhen-Guo Gao Di Lan Yong-Hong Cheng Guang-Lei Wu Hong-Jing Wu School of Science Northwestern Polytechnical UniversityXi'an 710072China Center of Nanomaterials for Renewable Energy(CNRE) State Key Laboratory of Electrical Insulation and Power EquipmentSchool of Electrical EngineeringXi'an 3iaotong UniversityXi'an 710049China Institute of Materials for Energy and Environment State Key Laboratory Breeding Based of New Fiber Materials and Modem Textile College of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Epoxy-based composites containing montmorillonite(MMT)modified by silylation reaction withγ-aminopropyltriethoxysilane(γ-APTES)and 3-(glycidyloxypropyl)trimethoxysilane(GPTMS)are successfully *** effects of filler loading and surface modification on the electrical and thermal properties of the epoxy/MMT composites are *** with the pure epoxy resin,the epoxy/MMT composite,whether MMT is surface-treated or not,shows low dielectric permittivity,low dielectric loss,and enhanced dielectric *** MMT in the epoxy/MMT composite also influences the thermal properties of the composite by improving the thermal conductivity and *** functionalization of MMT not only conduces to the better dispersion of the nanoparticles,but also significantly affects the electric and thermal properties of the hybrid by influencing the interfaces between MMT and epoxy *** interfaces are good for enhancing the electric and thermal properties of *** is more,the MMT modified with GPTMS rather thanγ-APTES is found to have greater influence on improving the interface between the MMT filler and polymer matrices,thus resulting in lower dielectric loss,lower electric conductivity,higher breakdown strength,lower thermal conductivity,and higher thermal stability.

关键词： modified epoxy resin surface modification electric property thermal property

Influence of air addition on surface modification of polyethylene terephthalate treated by an atmospheric pressure argon plasma brush

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Plasma Science and Technology 2021年第8期23卷 127-134页

作者： Jiacun WU Kaiyue WU Junyu CHEN Caihong SONG Pengying JIA Xuechen LI College of Physics Science and Technology Hebei UniversityBaoding 071002People's Republic of China Institute of Life Science and Green Development Hebei UniversityBaoding 071002People's Republic of China

An atmospheric pressure argon plasma brush with air addition is employed to treat polyethylene terephthalate(PET)surface in order to improve its *** indicate that the plasma plume generated by the plasma brush presents periodically pulsed current despite a direct current voltage is ***-current curve reveals that there is a transition from a Townsend discharge regime to a glow one during one discharge *** emission spectrum indicates that more oxygen atoms are produced in the plume with increasing air content,which leads to the better hydrophilicity of PET surface after plasma ***,an aging behavior is also *** hydrophilicity improvement is attributed to the production of oxygen functional groups,which increase in number with increasing air ***,some grain-like structures are observed on the treated PET surface,and its mean roughness increases with increasing air *** results are of great importance for the hydrophilicity improvement of PET surface with a large scale.

关键词： plasma brush water contact angle surface modification plasma treatment hydrophilicity improvement

Peanut Shell Activated Carbon： Characterization, surface modification and Adsorption of Pb^2＋ from Aqueous Solution

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Chinese Journal of Chemical Engineering 2008年第3期16卷 401-406页

作者：徐涛刘晓勤 State Key Laboratory of Materials-oriented Chemical Engineering Nanjing University of Technology Nanjing 210009 China

Metal ion contamination of drinking water and waste water, especially with heavy metal ion such as lead, is a serious and ongoing problem. In this work, activated carbon prepared from peanut shell （PAC） was used for the removal of Pb^2＋ from aqueous solution. The impacts of the Pb25 adsorption capacities of the acid-modified carbons oxidized with HNO3 were also investigated. The surface functional groups of PAC were confirmed by Fourier transform infrared （FTIR） spectroscopy, X-ray photoelectron spectroscopy （XPS）, Boehm titration. The textural properties （surface area, total pore volume） were evaluated from the nitrogen adsorption isotherm at 77 K. The experimental results presented indicated that the adsorption data fitted better with the Langmuir adsorption model. A comparative study with a commercial granular activated carbon （GAC） showed that PAC was 10.3 times more efficient compared to GAC based on Langmuir maximum adsorption capacity. Further analysis results by the Langmuir equation showed that HNO3 [20% （by mass）] modified PAC has larger adsorption capacity of Pb^2＋ from aqueous solution （as much as 35.5 mg·g^-1）. The adsorption capacity enhancement ascribed to pore widening, increased cation-exchange capacity by oxygen groups, and the promoted hydrophilicity of the carbon surface.

关键词： activated carbon phosphoric acid adsorption wastewater treatment surface modification

Different surface modification methods and coating materials of zinc metal anode

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Journal of Energy Chemistry 2022年第3期31卷 397-412,I0011页

作者： Feng Tao Yong Liu Xinyuan Ren Jing Wang Yazhou Zhou Yingjie Miao Fengzhang Ren Shizhong Wei Jianmin Ma Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology Henan Key Laboratory of Non-Ferrous Materials Science&Processing TechnologySchool of Materials Science and EngineeringHenan University of Science and TechnologyLuoyang 471023HenanChina National Joint Engineering Research Center for Abrasion Control and Molding of Metal Materials Henan Key Laboratory of High-Temperature Structural and Functional MaterialsHenan University of Science and TechnologyLuoyang 471003HenanChina School of Art&Design Henan University of Science and TechnologyLuoyang 471023HenanChina School of Physics and Electronics Hunan UniversityChangsha 410082HunanChina School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina

Rechargeable aqueous Zn-ion batteries(AZIBs)are one of the most promising energy storage devices for large-scale energy storage owing to their high specific capacity,eco-friendliness,low cost and high ***,zinc metal anodes suffer from severe dendrite growth and side reactions,resulting in the inferior electrochemical performance of *** address these problems,surface modification of zinc metal anodes is a facile and effective method to regulate the interaction between the zinc anode and an *** this review,the current challenges and strategies for zinc metal anodes are ***,recent advances in surface modification strategies to improve their electrochemical performance are concluded and ***,challenges and prospects for future development of zinc metal anodes are *** hope this review will be useful for designing and fabricating highperformance AZIBs and boosting their practical applications.

关键词： Zn-ion batteries Zinc metal anode surface modification Solvent casting method Wet chemistry method

Structure and surface modification of MXene for efficient Li/K-ion storage

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Journal of Energy Chemistry 2022年第12期75卷 330-339,I0009页

作者： Keke Guan Long Dong Yingying Xing Xuke Li Jin Luo Quanli Jia Haijun Zhang Shaowei Zhang Wen Lei The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina Henan Key Laboratory of High Temperature Functional Ceramics Zhengzhou UniversityZhengzhou 450052HenanChina College of Engineering Mathematics and Physical SciencesUniversity of ExeterExeter Ex44QFUnited Kingdom

In this paper,three-dimensional(3D)hollow Ti_(3)C_(2)T_(x)MXene tubes(HTCTs)with more–O terminal groups and fewer–F groups are successfully prepared via the template-oriented electrostatic self-assembly and the subsequent annealing *** obtained 3D hollow structure with large specific surface area,unique porous structure,and enlarged interlayer spacing could prevent the re-stacking of twodimensional(2D)sheets and shorten the diffusion pathway of ***,density functional theory(DFT)calculations and electrochemical tests reveal that Ti_(3)C_(2)O_(2)MXene possesses higher adsorption ability and lower diffusion barrier for K^(+)and Li^(+)compared to Ti_(3)C_(2)MXene dominated by–F terminal *** from the synergistic effect of the structural design and surface modification,the asprepared 3D HTCTs exhibit excellent electrochemical performance as anodes for K^(+)and Li^(+)storage compared with 2D Ti_(3)C_(2)T_(x)sheets(TCSs).

关键词： Hollow Ti_(3)C_(2)T_(x)tubes surface modification Anodes K^(+)storage Li^(+)storage

Using pectin to separate talc and molybdenite through the surface modification with Cu^(2+):Applications and mechanism

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International Journal of Mining Science and Technology 2023年第3期33卷 363-377页

作者： Changtao Wang Qilin Zhai Runqing Liu Meirong Wu Wei Sun Nianwen Jing Feifei Xie School of Minerals Processing and Bioengineering Central South UniversityChangsha 410083China

Organic depressants have low selectivity in separating molybdenite and talc because their metal sites lack activity for organics *** this study,surface modification by copper sulfate was used to induce the differential adsorption of pectin onto molybdenite and talc surfaces for enhanced flotation ***-angle experiments,scanning electron microscopy,adsorption measurements,timeof-flight secondary-ion mass spectrometry,and X-ray photoelectron spectroscopy analyses were conducted to reveal the interaction *** illustrated that molybdenite and talc could not be separated using pectin alone,while molybdenite was selectively depressed after surface modification by copper sulfate and this effect was strengthened under alkaline *** sites(Mg,Si and Mo)of talc and molybdenite themselves were unable to react with pectin,whereas Cu+would deposit and further function as active site for pectin chemisorption after surface ***,the quantity of deposited Cu sites dropped on talc surface and increased on molybdenite surface with increased pH,and the Mo atoms of molybdenite crystal were activated to take part in pectin ***,more pectin was adhered on molybdenite surface,which imparted molybdenite stronger ***,surface-modification through metal ions can enable the differential adsorption of organic depressants and enhance the flotation separation of minerals.

关键词： Molybdenite Talc surface modification Induced adsorption

Synthesis and surface modification of cobalt nanoparticles and electromagnetic property of Co/PPy nanocomposites

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Rare Metals 2015年第4期34卷 223-228页

作者： Hai-Cheng Wang Zhi-Ran Yan Ling Deng Hua Dong Yi-He Jia Ning Ma Jun He Guang-Hua Yu School of Materials Science and Engineering University of Science and Technology Beijing Institute of Functional Materials Central Iron & Steel Research Institute

In this work, cobalt nanoparticles were syn- thesized by chemical reduction procedure. After the hydrophilic functionalization, Co/polypyrrole （PPy） nanocomposites were prepared by in situ polymerization of pyrrole in aqueous dispersion of Co nanoparticles. The Co/ PPy nanocomposites show good electromagnetic properties with both magnetic loss and dielectric loss to electromag- netic wave. The electromagnetic wave absorbing band- width （reflection loss 〈-10 dB） for Co/PPy （20 wt%） is above 5.5 GHz at a thickness of 2 mm, and with a maximum reflection loss （around -20.02 dB） at 14.77 GHz. This magnetic nanoparticles/conducting polymer nanocomposites are great potential candidates for electromagnetic wave absorbent, because of their wide-absorbing frequency, strong absorption, good compatibility, low density, and controllable absorbing properties.

关键词： Cobalt nanoparticles Synthesis surface modification Nanocomposites Electromagnetic property