疏水纳米SiO_2改性鳞片石墨的流动性及红外干扰性能（英文）  

Flowability and Infrared Interference Properties of Modified Graphite Flake with Hydrophobic Nano-silica

作　　者：宁功韬[1] 栗苹[1] 崔玉玲[2] 李石川[3] 汤润泽 周遵宁[3] 

机构地区：[1]北京理工大学机电控制工程国防重点实验室 [2]73921部队 [3]北京理工大学爆炸科学与技术国家重点实验室

出　　处：《含能材料》2015年第12期1217-1220,共4页Chinese Journal of Energetic Materials

基　　金：National Defense Key Projects(1011)

摘　　要：为研究疏水纳米SiO_2改性鳞片石墨的分散性能和红外干扰效能,采用粉体特性测试仪测定了改性前后鳞片石墨粒子的流动性。采用气流分散的方式将鳞片石墨粒子分散在烟幕箱中形成烟幕。测试了烟幕的质量浓度和红外光谱透过率。依据搅拌沉降模型,计算得到了烟幕的沉降速度。结果表明,用质量分数为4.0%的疏水纳米SiO_2改性鳞片石墨的Carr流动性指数最高,达到了61,同时鳞片石墨粒子的沉降速度也从改性前的2.288×10-3m·s^(-1)降至改性后的1.125×10-3m·s^(-1),形成的烟幕在3~5μm和8~12μm波段的平均红外光谱透过率也分别从0.3895%和0.7288%降为0.072%和0.176%。疏水纳米SiO_2对鳞片石墨表面的物理修饰,有效改善了鳞片石墨粒子的流动性和分散性能,显著提高了鳞片石墨形成烟幕的留空持续时间和红外干扰性能。To research the dispersion properties and infrared （IR） interference efficiency of graphite flake particulates modified by hydrophobic nanosilica, the flowability of graphite flake particles before and after modification was measured by a powder property tester. The smoke was formed by dispersing the graphite flake particles into the smoke box using air flow dispersion way. The mass concentration and IR spectrum transmission of the smoke were measured. On the basis of stir settlement model, the settling velocity of smoke was calculated. Results show that the Carr＇s flowability index of graphite flake particulates modified with hydrophobic nano-silica in mass ratio of 4.0 % is the highest, reaching 61 and at the same time, the settling velocity decreases from 2. 288×10-3 m s-1 before modification to 1.125×10-3 m s-1 after modification. Average IR spectrum transmis- sion of the smoke formed in the wave band range of 3-5 μm and 8-12 p,m decreases from 0.3895 % and 0.7288% to 0.072% and 0. 176%. The physical modification of hydrophobic nano-SiO2 on graphite flake surface effectively improves the flowability and dispersion properties and significantly increases the duration of the smoke formed by graphite flake particles and IR interference performance.

关 键 词：光电对抗 鳞片石墨 疏水纳米SiO2 遮蔽 流动性 

分 类 号：TQ127.11[化学工程—无机化工]