钴-60 γ辐照对防护型口罩静电吸附效能的影响

辐射防护 ›› 2022, Vol. 42 ›› Issue (3): 229-235.

钴-60 γ辐照对防护型口罩静电吸附效能的影响

戴勇智¹, 夏候琼¹, 曹锦佳¹, 肖海亮², 陈强², 李帆²

1.南华大学核科学技术学院,湖南衡阳 421001;
2.上海金鹏源辐照技术有限公司,上海 201707

收稿日期:2021-07-19 发布日期:2022-07-01
通讯作者: 曹锦佳。E-mail:caojinjia@usc.edu.cn
作者简介:戴勇智(1997—),男,2019年毕业于南华大学计算机学院软件工程专业,现为南华大学核科学技术学院能源动力专业在读硕士研究生。E-mail:dai0233@qq.com
基金资助:
湖南省教育厅重点基金项目(No.20A417)、湖南省国际合作基地项目(No.2018WK4009)、衡阳市科学技术发展计划(衡阳市重点实验室No.2018KJ108)、校企合作科研项目(No.190KHX005)、南华大学博士启动基金(No.2017XQD08)、辐射剂量与防护实验虚拟仿真系统开发研究(No.202JXJ034)资助。

The effect of ⁶⁰Co γ irradiation on the electrostatic adsorption efficiency of protection masks

DAI Yongzhi¹, XIA Houqiong¹, CAO Jinjia¹, XIAO Hailiang², CHEN Qiang², LI Fang²

1. School of Nuclear Science and Technology, University of South China, Hunan Hengyang 421001;
2. Shanghai Jinpengyuan Irradiation Technology Co. Ltd., Shanghai 201707

Received:2021-07-19 Published:2022-07-01

摘要/Abstract

摘要： 呼吸防护口罩在新冠肺炎大流行期间得到了广泛的使用,由于物资紧缺,医学研究人员尝试消毒口罩重复利用,其中包括采用电离辐射灭菌。依托上海金鹏源辐照技术有限公司的伽玛辐照装置,针对KN95和KN100呼吸防护型口罩进行辐照,研究不同的剂量和剂量率对口罩过滤效率的影响。采用铁板屏蔽和生产线辐照物品的屏蔽来产生两组不同剂量率的辐射场,口罩吸收剂量采用重铬酸银剂量计、Harwell Amber 3042剂量计和UV-2450型紫外分光光度计进行测定,两款口罩均符合标准GB 2626—2019,因此采用该国标方法测量口罩颗粒物过滤效率。对测量数据进行处理,估计了辐照剂量对口罩静电捕集效率的影响。结果表明:两种口罩的过滤效率都随吸收剂量的增高而快速下降,最终KN95口罩的过滤效率保持在68.2%~72.9%,KN100口罩的过滤效率保持在89.7%~93.7%。因条件所限,实验起始剂量较高(1.02 kGy),当前采用的两组剂量率(1.9 kGy/h,3.66 kGy/h)对口罩过滤效率影响较小。电离辐射消除了防护型口罩上的静电,计算得到KN95口罩单根纤维静电捕集效率占总捕集效率的80.1%,KN100占72.5%。

关键词: KN95, KN100, 电离辐射消电, 静电捕集效率

Abstract: Respiratory protectiion masks have been widely used during the COVID-19 pandemic. Due to the shortage of supplies, medical researchers have tried to disinfect and reuse the masks, including sterilization by ionizing radiation. Based on the gamma irradiation device of Shanghai Jinpengyuan Irradiation Technology Co. Ltd., the KN95 and KN100 respiratory protection masks are irradiated to study the influence of different doses and dose rates on the filtration efficiency of the masks. The iron plate shielding and the shielding of the irradiated items of the production line are used to generate two sets of radiation field with dose rates(1.9 kGy/h,3.66 kGy/h). The absorbed doses of the masks are measured with a silver dichromate dosimeter, Harwell Amber 3042 dosimeter, and UV-2450 ultraviolet spectrophotometer. Both masks conform to the standard GB 2626—2019, so the recommended method in the GB is used to measure the filtration efficiency on particulate matter. The measurement data were processed, and the influence of the radiation dose on the electrostatic collection efficiency of the mask was estimated. The results show that the filtration efficiency of the two masks decreases rapidly with the increase of the absorbed dose, regardless of the high or low dose rate. In the end, the filtration efficiencies of the KN95 and KN100 masks are maintained at 68.2%-72.9% and at 89.7%-93.7%, respectively. Ionizing radiation eliminates the static electricity on the protection masks. The electrostatic collection efficiency of single mask fiber of KN95 accounts for 80.1% of the total collection efficiency, and for KN100 it accounts for 72.5%.

Key words: KN95, KN100, electrostatic elimination with ionizing radiation, electrostatic collection efficiency

中图分类号:

TL13

戴勇智, 夏候琼, 曹锦佳, 肖海亮, 陈强, 李帆. 钴-60 γ辐照对防护型口罩静电吸附效能的影响[J]. 辐射防护, 2022, 42(3): 229-235.

DAI Yongzhi, XIA Houqiong, CAO Jinjia, XIAO Hailiang, CHEN Qiang, LI Fang. The effect of ⁶⁰Co γ irradiation on the electrostatic adsorption efficiency of protection masks[J]. RADIATION PROTECTION, 2022, 42(3): 229-235.

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