首页> 外文会议>Conference on Chemical and Biological Sensing V; 20040412-20040413; Orlando,FL; US >Mesoporous Membrane Technologies for the Collection of Airborne Biological Pathogens
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Mesoporous Membrane Technologies for the Collection of Airborne Biological Pathogens

机译:用于收集机载生物病原体的中孔膜技术

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There is an urgent need for efficient, rapid, and inexpensive collection techniques for pathogen detection in environmental samples. For over 40 years membrane filters have been played an important role in the collection of radiological and chemical samples from the environment. Recently inorganic mesoporous alumina membranes have been developed with high densities of highly uniform size pores. Measurements of the physical properties of membranes with 100 nm and 200 nm pores revealed that a transition state hydrodynamic condition exists hi the pores that enhanced the permeability of the membranes to gases. These membranes were also found to maintain a high permeability at relative humidities as high as 98% and to be capable of supporting pressures as high as 65 psi. A high density poly(ethylene glycol) monolayer was grafted to the alumina membranes to minimize the adhesion of aerosols to the membranes. This hybrid membrane allowed B. globigii spores to be extracted from aqueous solutions with 96.7% efficiencies. Multi-day collection runs with a prototype collector demonstrated that an instrument based on these membranes could be operated in complex environmental conditions.
机译:迫切需要高效,快速和廉价的收集技术,以检测环境样品中的病原体。 40多年来,膜过滤器在从环境中收集放射和化学样品方面一直发挥着重要作用。近来,已经开发出具有高密度,高度均匀尺寸的孔的无机中孔氧化铝膜。对具有100 nm和200 nm孔的膜的物理性能的测量表明,在孔中存在过渡态水动力条件,该条件增强了膜对气体的渗透性。还发现这些膜在高达98%的相对湿度下仍能保持较高的渗透性,并能够承受高达65 psi的压力。将高密度聚乙二醇单层接枝到氧化铝膜上,以最大程度地减少气雾剂对膜的粘附。该杂合膜允许从水溶液中提取球形双歧杆菌的孢子,效率为96.7%。使用原型收集器进行的多天收集运行证明,基于这些膜的仪器可以在复杂的环境条件下运行。

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