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Chinese Journal of Chemical Engineering 2022年第12期52卷 56-65页

作者： Jie Wang ling Zhang chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

Excellent mechanical properties are the prerequisite for the application of superhydrophobic polymer ***,significantly improving the mechanical properties without affecting other properties such as hydrophobicity is a huge *** this study,a superhydrophobic coating with excellent mechanical properties was prepared by spraying a mixture of polysiloxane resins based on three siloxane monomers,hexadecyltrimethoxysilane(HDTMS) modified nano-SiO_(2)particles(SiO_(2)-HDTMS) and polystyrene-grafted halloysite nanotubes(HNTs-PS).SiO_(2)-HDTMS dispersed homogeneously in polysiloxane coatings and the water contact angle of corresponding coating exceeding 150°,achieving *** SiO_(2)-HDTMS/HNTs-PS/polysiloxane composite coatings showed excellent abrasion resistance with the water coating contact angle remaining above 150°after 90 abrasion cycles,indicating that HNTs-PS can significantly improve the mechanical properties of the coating without affecting the hydrophobic properties of the *** achieved coating also exhibited excellent antifouling and acid and alkali corrosion *** work provides a convenient and ecologically friendly method to prepare superhydrophobic polysiloxane composite coating with excellent mechanical properties,which is promising in the application of anti-fouling,anti-corrosion,and oil-water separation etc.

关键词： Polysiloxane Superhydrophobic coating Mechanical properties

The origins of catalytic selectivity for the electrochemical conversion of carbon dioxide to methanol

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Nano Research 2024年第1期17卷 5-17页

作者： Tian Wang Yating Wang Yuhang li chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsFrontiers Science Center for Materiobiology and Dynamic ChemistrySchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China School of Chemical Engineering East China University of Science&TechnologyShanghai 200237China

The electrocatalytic conversion of carbon dioxide(CO_(2))into useful fuels and chemical feedstocks is an emerging route to alleviate global warming and reduce reliance on fossil ***(CH_(3)OH),as one of the most significant and widely used liquid fuels that can be generated by CO_(2)reduction,is essential in the chemical *** this minireview,we unravel the origins of the selective formation of CH_(3)OH via CO_(2)reduction,including catalyst composition designs,local structure modulations,and electrolyte/catalyst interface ***,the remaining challenges and perspectives for the CO_(2)-to-CH_(3)OH reduction are proposed.

关键词： methanol carbon dioxide(CO_(2))reduction reaction electrochemistry electrocatalyst catalyst-electrolyte interface

Metallic iron nanoparticles:Flame synthesis,characterization and magnetic properties

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Particuology 2013年第4期11卷 460-467页

作者： Yunfeng li Yanjie Hu Guangjian Huang chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science & Technology Department of Surgery Huashan HospitalFudan University

Metallic iron （Fe） nanoparticles （NPs） with a typical core-sheU structure have been prepared by a simple and continuous flame spray pyrolysis （FSP） method, which are stabilized by the corresponding Fe304 shell with a thickness of 4-6 nm. The size of metallic Fe cores is about 30-80 nm. The core-shell structured iron NPs show an air stability as long as one month as a result of the protection of oxide shell. Through the control of the residence time of materials in flame and flame atmosphere, metallic Fe and iron oxides are obtained, showing a better external magnetic field responsibility. It is concluded that the evolution of morphology and composition of flame-made magnetic NPs could be attributed to the competition mechanism between reduction and oxidation reactions of in situ flame combustion, which offers more choices and better effective design strategy for the synthesis of advanced functional materials via FSP techniques.

关键词： Iron NPsFSPReducing flameMagnetic properties

Nanomaterials synthesized by gas combustion flames:Morphology and structure

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Particuology 2010年第6期8卷 556-562页

作者： chunzhong li Yanjie Hu Weikang Yuan Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China State Key Laboratory of Chemical Engineering School of Chemical Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237. China

The flame technology has been employed broadly for large-scale manufacture of carbon blacks, fumed silica, pigmentary titania, and also ceramic commodities such as SiO2, Ti02, and A1203. A deeper understanding of the process also made it possible for production of novel nanomaterials with high functionality--various novel nanomaterials such as nanorods, nanowires, nanotubes, nanocoils, and nanocomposites with core/shell, hollow and ball-in-shell structures, have been synthesized recently via gas combustion technology, while the mechanisms of the material formation were investigated based on the nucleation-growth and chemical engineering principles. Studies of the fluid flow and mass mixing, supported by principles of chemical reaction engineering, could provide knowledge for better understanding of the process, and thus make rational manipulation of the products possible.

关键词： Flame Nanomaterials Synthesis Chemical engineering Structure

Structure controlling and process scale-up in the fabrication of nanomaterials

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Frontiers of Chemical Science and Engineering 2010年第1期4卷 18-25页

作者： chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

Nanotechnology is already having a significant commercial impact,and will very certainly have a much greater impact in the *** research on process engineering and scale-up will be very important for the commercial production and application of nanomaterials,because the properties and structure of nanomaterials are not only determined by the nucleation and growth process,but also strongly affected by the engineering properties,such as the mixing,the heat and mass transfer,and also the distribution of temperature,concentration,*** paper will present some research work in our laboratory on the fabrication of *** on the chemical engineering principle and methods,many kinds of novel nanomaterials can be synthesized and their structure can be easily controlled through adjusting the parameters of the fluid mixing,and the distribution of temperature,residence time and concentration,*** using the micro-mixing,heat and mass transfer and reaction control methods,the host-guest nanocomposites have been assembled and assumed as the novel electroanalytical sensing nanobiocomposite *** on the principles of chemical engineering,the manufacturing technologies for magnetic powders,calcium carbonate,and titanium dioxide have been developed for commercial-scale production,and the largest production scale has reached 15 kt/year.

关键词： nanomaterials assembly structure controlling scale-up engineering properties

Preparation of hollow alumina nanospheres via surfactant-assisted flame spray pyrolysis

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Particuology 2011年第5期9卷 528-532页

作者： Yanjie Hu Hongqiu Ding chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science ＆ Technology Shanghai 200237 China

Hollow A1203 nanospheres with well-defined structure and shape were successfully prepared via flame spray pyrolysis （FSP） in the presence of a surfactant as droplet stabilizer. The morphology and structure of the nanospheres were systematically characterized by transmission electron microscopy, scanning electron microscopy, and N2 sorption. A solution of hydrated aluminum nitrate, polyethylene glycol （PEG） and absolute ethanol was sprayed into a flame to transform droplets into particles after evaporation and surface nucleation, forming hollow AI203 nanospheres from aluminum nitrate decomposition. The surfactant was found effective in producing smaller droplets because of decreased surface tension and viscosity, while the combination of oxygen atoms on PEG chains and aluminum ions in solution reduced interfacial turbulence, leading to increased stability of the droplets.

关键词： Flame spray pyrolysis Surfactant-assisted Al2O3 Hollow nanospheres

Flame retardant synergy between interfacial and bulk carbonation in glass fiber reinforced polypropylene

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Chinese Journal of Chemical Engineering 2020年第6期28卷 1725-1732页

作者： Yuan Xue Rongjing Zhao ling Zhang chunzhong li Shanghai Engineering Research Center of Hierarchical Nanomaterials Key Laboratory for Ultrafine Materials of Ministry of EducationSchool of Materials Science and EngineeringEast China University of Science&TechnologyShanghai 200237China

Glass fiber reinforced polypropylene(GF-PP)composites have high flammability on account of wick effect which leads to accelerated flow of the polymer melt along the glass fibers(GF)surface to the flame *** this study,dipentaerythritol(DPER),a charring agent,was adsorbed on the GF surface through the hydrogen bond between silane coupling agent and *** has a synergistic effect with the intumescent flame retardants(IFR)added in the composites,which can induce interfacial carbonization on the surface of GF,thus transforming the intrinsic smooth GF surface into roughness *** this way,the negative effect of the wick effect in flame retardancy is ***,the char residues remained on the surface of GF can bring an improved adhesion between GF and char residues formed in the resin so that a more stable barrier char layer is *** PP composites with 20 wt%modified glass fiber(M-GF)and 30 wt%IFR can achieve the UL-94 V-0,and its limiting oxygen index(LOI)value increased from 16.5%to 29.5%.Simultaneously,the heat release rate(HRR),total heat release(THR)and total smoke release(TSR)decreased significantly,and the peak of heat release rate(PHRR)reduced60.6%compared with GF-PP.

关键词： Glass fiber Wick effect Flame retardant Interfacial Char layers

Surface-engineering of layered liNi_(0.815)Co_(0.15)Al_(0.035)O_2 cathode material for high-energy and stable li-ion batteries

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Journal of Energy Chemistry 2018年第2期27卷 559-564页

作者： Yugang li Haifeng Yu Yanjie Hu Hao Jiang chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education & School of Materials Science and Engineering East China University of Science and Technology

Surface engineering is an effective strategy to restrain the generation of rocksalt NiO phase on surface of layered liNi0.815Co0.15Al0.035O2（NCA） primary nanoparticles, a representative Ni-rich layered oxides cathode materials. Herein, we demonstrate the kilogram-scale synthesis of few-layer reduced graphene oxide（rGO） conformably coated NCA primary nanoparticles cathode materials by a mechanical wet ball-milling strategy. The lightening rGO coating layer effectively avoids the direct contact of electrolyte and NCA with rapid electrons transfer. As a result, the as-obtained NCA@rGO hybrids with only 1.0 wt% rGO content can deliver a high specific capacity（196 mAh g-1 at 0.2 C） and fast charge/discharge capability（127 mAh g-1 at 5 C）, which is much higher than the corresponding NCA nanoparticles（95 mAh g-1 at 5 C）. Even after100 cycles at 1 C, 91.7% of initial reversible capacity is still maintained. Furthermore, a prismatic pouch cell（240 mAh） is also successfully assembled with the commercial graphite anode.

关键词： Layered materials Cathode Reduced graphene oxide Energy density li-ion batteries

Comparative Study on Optical Properties and Scratch Resistance of Nanocomposite Coatings Incorporated with Flame Spray Pyrolyzed Silica Modified via in-situ Route and ex-situ Route

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Journal of Materials Science & Technology 2016年第3期32卷 251-258页

作者： Yun Wang ling Zhang Yanjie Hu chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Science and Engineering East China University of Science and Technology

A new type of transparent scratch resistant coatings including in-situ modified SiO2 （g-SiO2） in flame spray pyrolysis （FSP） process was prepared. The maximum content of g-SiO2 in the coating was 15 wt%, which is higher than that of SiO2 modified by traditional wet chemical route （I-SiO2, only 10 wt%）. The results of transmission electron microscopy have demonstrated that in-situ surface modified g-SiO2 particles dispersed well with smaller agglomerates in the final coating, which was much better than the particles modified via wet chemical route. Visible light transmittance and haze tests were introduced to characterize the optical quality of the films. All coatings were highly transparent with the visible light transmittance of above 80%, especially for coatings containing g-SiO2, which exhibited slightly higher visible light transmittance than l-SiO2 embedded one. The haze value of coatings incorporated with 15 wt% g-SiO2 was 1.85%, even lower than the coating with 5 wt% I-SiO2 （haze value of 2.09%）, indicating much better clarity of g-SiO2. The excellent optical property of g-SiO2 filled coatings was attributed to the good dispersion and distribution of particles. Nano-indention and nano-scratch tests were con- ducted to investigate the scratch resistance of coatings on nano-scale. The surface hardness of the coatings rose by 18% and 14%, and the average friction coefficient decreased by 15% and 11%, respectively, compared to the neat coat due to the addition of 10 wt% g-SiO2 and I-SiO2. The pencil hardness of the coating with 15 wt% g-SiO2 increased from 2B for the neat coating to 2H. However, the pencil hardness of coating with 10 wt% I-SiO2 was only H. The results showed that the g-SiO2 embedded coatings exhibited higher scratch resistance and better optical properties.

关键词： ln-situ modification Silica Coating Scratch resistance Optical property

Photoelectrochemical glucose biosensor incorporating CdS nanoparticles

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Particuology 2009年第5期7卷 347-352页

作者： Jinjie Sun Yihua Zhu Xiaoling Yang chunzhong li Key Laboratory for Ultrafine Materials of Ministry of Education School of Materials Sdence and EngineeringEast China University of Science and Technology 130 Meilong Road. Shanghai 200237 China

A novel photoelectrochemical biosensor incorporating nanosized CdS semiconductor crystals with enzyme to enhance photochemical reaction has been investigated. CdS nanoparticles were synthesized by using dendrimer PAMAM as inner templates. The CdS nanoparticles and glucose oxidase （GOD） were immobilized on Pt electrode via layer-by-layer （LbL） technique to fabricate a biological-inorganic hybrid system. Under ultraviolet light, the photo-effect of the CdS nanoparticles showed enhancement of the biosensor to detect glucose. Pt nanoparticles were mixed into the Nation film to immobilize the CdS/enzyme composites and to improve the charge transfer of the hybrid. Experimental results demonstrate the desirable characteristics of this biosensing system, e,g. a sensitivity of 1.83 μA/（mM cm^2）, lower detection limit （1 μM）, and acceptable reproducibility and stability,

关键词： CdS nanoparticles PAMAM Photoelectrochemical Biosensor Glucose oxidase Layer-by-layer