用于放射性纳米气溶胶模拟的准单分散气溶胶发生器的研制

辐射防护 ›› 2014, Vol. 34 ›› Issue (5): 310-314.

用于放射性纳米气溶胶模拟的准单分散气溶胶发生器的研制

粟永阳, 朱凤蓉, 刘龙波, 韦冠一, 李志明, 周国庆, 张志弘, 伊小伟

西北核技术研究所,西安 710024

收稿日期:2013-10-23 出版日期:2014-09-20 发布日期:2025-01-06
作者简介:粟永阳(1981—),男,2004年毕业于清华大学工程物理系核工程与核技术专业,2009年毕业于清华大学工程物理系核科学与技术专业,获工学博士学位,副研究员。E-mail:aerosu@139.com
基金资助:
国家自然科学基金资助项目(11105107)。

A Quasi-monodisperse Aerosol Generator Used in Radioactive Nanoparticle Simulation

Su Yongyang, Zhu Fengrong, Liu Longbo, Wei Guanyi, Li Zhiming, Zhou Guoqing, Zhang Zhihong, Yi Xiaowei

Northwest Institute of Nuclear Technology, Xi’an 710024

Received:2013-10-23 Online:2014-09-20 Published:2025-01-06

摘要/Abstract

摘要： 放射性纳米气溶胶特性行为及过滤研究一直是辐射防护关注的内容,但目前缺乏单分散纳米气溶胶发生器和高灵敏的气溶胶在线检测器。为模拟示踪放射性气溶胶纳米粒子,并适合用质谱仪进行在线检测分析,本文采用蒸发-冷凝原理研制出一种纳米气溶胶发生器,能够利用含低熔点物质(如氯化钠和硝酸银)的溶液,输出准单分散、较高数浓度的纳米气溶胶。用标定后的扫描迁移率粒子谱仪对发生器进行性能测试,结果表明:输出纳米气溶胶的粒度分布符合对数正态分布,在建议工况下,输出粒子的峰位粒径约30 nm,几何标准偏差约1.3,数浓度达10⁶cm^-3,数浓度波动小于10%。发生器成本低、性能可靠、使用灵活,能够满足放射性气溶胶特性模拟和过滤净化技术研究等需求。

关键词: 放射性气溶胶, 准单分散, 纳米气溶胶发生器, 质谱在线检测

Abstract: An evaporation-condensation-type aerosol generator capable of producing quasi-monodisperse and high number concentration nanoparticles was developed. Using a calibrated Scanning Mobility Particle Sizer (SMPS), the generator performance under different operation conditions was evaluated by means of on-line monitoring of the size distributions of the generated nanoparticle. Results show that the size distributions of the generated nanoparticles agree well with lognormal distribution. The mode diameter is about 30 nm under proposed conditions. The geometric standard deviation is about 1.3, which means that the particles are quasi-monodisperse. The number concentration could achieve 10⁶ cm^-3 and the variation is less than 10%. The generator has advantages of low cost, reliable performance, and easy-to-use. It could fulfill the requirements for the simulation study on radioactive aerosol and filtration techniques development of nanoparticles.

Key words: radioactive aerosol, quasi-monodisperse, nanoparticle generator, on-line detection by mass spectrometer

中图分类号:

TL75+1

粟永阳, 朱凤蓉, 刘龙波, 韦冠一, 李志明, 周国庆, 张志弘, 伊小伟. 用于放射性纳米气溶胶模拟的准单分散气溶胶发生器的研制[J]. 辐射防护, 2014, 34(5): 310-314.

Su Yongyang, Zhu Fengrong, Liu Longbo, Wei Guanyi, Li Zhiming, Zhou Guoqing, Zhang Zhihong, Yi Xiaowei. A Quasi-monodisperse Aerosol Generator Used in Radioactive Nanoparticle Simulation[J]. RADIATION PROTECTION, 2014, 34(5): 310-314.