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Fabrication of Superhydrophobic Aluminum Plate by surface etching and Fluorosilane Modification

Chemical Research in Chinese Universities 2012年第5期28卷 903-906页

作者： YIN Shi-heng ZHU Bin LIU Yun-chun YANG Ji KUANG Tong-chun Analytical&Testing Center South China University of TechnologyGuangzhou 510640P.R.China College of Materials Science and Engineering South China University of TechnologyGuangzhou 510640P.R.China

Superhydrophobic aluminum surfaces with a high water contact angle and low sliding angle on aluminum plate substrate were fabricated by means of surface etching with sodium hydroxide under ultrasonic bathing and then modification with fluorosilane. Scanning electron microscopy（SEM） showed a honeycomb-like structure on aluminum substrate surface after etching under ultrasonic bathing. And the surface was rendered from superhydrophilicity to superhydrophobicity after further modification with fluorosilane.

关键词： Superhydrophobicity Aluminum surface etching Fluorosilane

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Construct a 3D microsphere of HMX/B/Al/PTFE to obtain the high energy and combustion reactivity

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Defence Technology（防务技术） 2024年第2期32卷 45-54页

作者： Jian Wang Jie Chen Yaofeng Mao Yongjun Deng Wei Cao Fude Nie Jun Wang Institute of Chemical Materials China Academy of Engineering PhysicsMianyang 621999PR China Shock and Vibration of Engineering Materials and Structures Key Lab of Sichuan Province Mianyang 621010PR China

Metal(aluminum and boron)based energetic materials have been wildly applied in various fields including aerospace,explosives and micro-devices due to their high energy ***,the low combustion efficiency and reactivity of metal fuels,especially boron(B),severely limit their practical ***,multi-component 3D microspheres of HMX/B/Al/PTFE(HBA)have been designed and successfully prepared by emulsion and solvent evaporation method to achieve superior energy and combustion *** reactivity and energy output of HBA are systematically measured by ignitionburning test,constant-volume explosion vessel system and bomb *** to the increased interfacial contact and reaction area,HBA shows higher flame propagation rate,faster pressurization rate and larger combustion heat of 29.95 cm/s,1077 kPa/s,and 6164.43 J/g,which is 1.5 times,3.5 times,and 1.03 times of the physical mixed counterpart(HBA-P).Meanwhile,HBA also shows enhanced energy output and reactivity than 3D microspheres of HMX/B/PTFE(HB)resulting from the high reactivity of *** reaction mechanism of 3D microspheres is comprehensively investigated through combustion emission spectral and thermal analysis(TG-DSC-MS).The superior reactivity and energy of HBA originate from the surface etching of fluorine to the inert shell(Al_(2)O_(3) and B_(2)O_(3))and the initiation effect of Al to *** work offers a promising approach to design and prepare high-performance energetic materials for the practical applications.

关键词： HMX/B/Al/PTFE 3D microspheres surface etching Reaction mechanism

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Overcoming side reaction effects in the colloidal synthesis of ZnSe/ZnS core/shell quantum dots with an etching strategy

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Nano Research 2024年第8期17卷 7020-7026页

作者： Jinhua He Chenhui Wang Mingrui Liu Muhammad Ramzan Zhiwei Long Xian-gang Wu Yu Chen Haizheng Zhong MIIT Key Laboratory for Low-Dimensional Quantum Structure and Devices School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Engineering Research Center for Mixed Reality and Advanced Display Technology School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

The potential use of large-size ZnSe quantum dots as blue emitters for display applications has greatly inspired the colloidal ***,we report the negative effects of side reactions of large-size ZnSe quantum *** side reactions between oleic acid and oleylamine generated amidation products and H_(2)O,which led to the hydrolysis of Zn(OA)2 to Zn(OH)2 and the subsequent formation of zinc oxide(ZnO)and zinc bis[diphenylphosphinate](Zn(DPPA)2)*** side reactions resulted in the formation of a defective surface including a Se-rich surface and oxygen-related *** negative effects can be overcome by adopting an etching strategy using potassium fluoride and myristic acid in *** overcoating a ZnS shell,blue emissive ZnSe/ZnS quantum dots with a maximum photoluminescence quantum yield of up to 91%were *** further fabricated ZnSe quantum dots-based blue light-emitting diodes with an emission peak at 456 *** device showed a turn-on voltage of 2.7 V with a maximum external quantum efficiency of 4.2%and a maximum luminance of 1223 cd·m^(−2).

关键词： quantum dots ZnSe side reactions surface etching light-emitting diodes

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