干燥方法对人工制备生物气溶胶消光性能的影响  

Effect of Drying Methods on Extinction Properties of Artificial Bioaerosols

作　　者：王新宇 胡以华 杨星 顾有林 何海浩 丁婉莹 王鹏[4] Wang Xinyu;Hu Yihua;Yang Xing;Gu Youlin;He Haihao;DingWanying;Wang Peng(State Key Laboratory of Pulsed Power Laser Technology,National University of Defense Technology,Hefei 230037,Anhui,China;Advanced Laser Technology Laboratory of Anhui Province,National University of Defense Technology,Hefei 230037,Anhui,China;Anhui Province Key Laboratory of Electronic Restriction,National University of Defense Technology,Hefei 230037,Anhui,China;Key Laboratory of Ion Beam Bioengineering,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230037,Anhui,China)

机构地区：[1]国防科技大学脉冲功率激光技术国家重点实验室,安徽合肥230037 [2]国防科技大学先进激光技术安徽省实验室,安徽合肥230037 [3]国防科技大学电子制约技术安徽省重点实验室,安徽合肥230037 [4]中国科学院合肥物质科学研究院中国科学院强磁场与离子束物理生物学重点实验室,安徽合肥230037

出　　处：《光学学报》2023年第17期216-226,共11页Acta Optica Sinica

基　　金：国家自然科学基金(61871389,62075241);安徽省自然科学基金(1408085MKL47);安徽省先进激光技术实验室基金(20191003);国防科技大学科研计划项目重大项目(ZK18-01-02);国防科技大学自主创新科学基金(22-ZZCX-07)。

摘　　要：通过建立具有丰富结构细节的生物颗粒形态模型,利用Kramers-Kronig算法、离散偶极子近似方法和蒙特卡罗算法计算了冷冻干燥和热风烘干两种干燥方法对BB0819生物气溶胶消光性能的影响,并通过傅里叶变换和红外光谱方法分析了由两种干燥方法所得孢子形成的生物气溶胶内部组成和蛋白质结构的差异,进一步解释了消光性能变化的原因。通过气溶胶室实验证明了仿真结果的可靠性,实验结果显示:在中红外波段,选用冷冻干燥孢子所形成的生物气溶胶可在3 min内将平均透过率从11.95%降至9.14%;在远红外波段,选用热风烘干孢子所形成的生物气溶胶可在3 min内将平均透过率从34.38%降至26.03%。研究结果阐明了干燥方法对人工制备生物气溶胶消光性能的影响,为在制备过程中提升生物气溶胶消光性能提供了有效参考。Objective Bioaerosols are colloid systems formed by tiny biological particles floating in the atmosphere,such as bacteria,fungi,viruses,and pollen.Bioaerosol particles can scatter and absorb solar radiation,communication signals,and optical signals,and can also be suspended in the air and spread long distances with the wind.Therefore,they exert an effect on many fields such as climate change,optical communication,and optical remote sensing.They have also attracted widespread attention in research areas such as functional materials,environmental protection,and disease transmission and prevention.Bioaerosol particles have diverse morphologies and rich compositions and can absorb and scatter incident light in multiple wavelengths.Additionally,their artificial cultivation techniques are relatively mature,with low cultivation costs,simple operation,and short cultivation periods.As a result,the artificially prepared bioaerosols have great development potential in the research on optical functional materials.Drying is an essential step in the artificial preparation of bioaerosols,and it can affect the broadband extinction performance of artificially prepared bioaerosols.However,the influence of different drying methods on the extinction performance of bioaerosols has not been studied.Our paper aims to investigate the influence of different drying methods on the extinction performance of artificially prepared bioaerosols and provide references for improving the extinction performance of bioaerosols through preparation.Methods BB0819 spores are one of the common entomopathogenic fungal spores and have been proven to have significant broadband extinction performance.Therefore,BB0819 spores are selected as the research object to investigate the effect of drying methods on the extinction performance of artificially prepared bioaerosols.In our study,two common microbial treatment methods,freeze drying and hot-air drying,are chosen to dry BB0819 spores.The preparation process consists of four main steps,including spore suspens

关 键 词：材料 生物气溶胶 消光性能 散射 吸收 干燥方法 

分 类 号：O436[机械工程—光学工程]