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A System to Create Stable Nanoparticle Aerosols from Nanopowders

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Development of a high-volume air sampler for nanoparticles.

M Hata¹, T Thongyen, L Bao

¹Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan. m-hata@t.kanazawa-u.ac.jp.

Environmental Science. Processes & Impacts

|September 12, 2014

Summary

A novel high-volume air sampler using layered-mesh inertial filters effectively collects nano-particles (150-190 nm). This new design improves separation performance and maintains consistency with existing samplers for ambient particle collection.

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Area of Science:

Environmental Science
Engineering
Nanotechnology

Background:

Accurate nano-particle characterization requires efficient collection methods.
Existing inertial filters have limitations in nano-particle separation.
High-volume air sampling is crucial for environmental monitoring.

Purpose of the Study:

To develop and evaluate a new high-volume air sampler for nano-particle collection.
To investigate the separation performance of a novel layered-mesh inertial filter.
To assess the effectiveness of a pre-separator for enhanced particle capture.

Main Methods:

Development of a layered-mesh inertial filter with multi-circular nozzles.
Experimental investigation of separation performance at varying filtration velocities.
Evaluation of a webbed stainless steel fiber mat as a pre-separator.
Assessment of scale-up effects and particle loading impact.

Main Results:

The developed filter demonstrated good separation performance for particles with a d p50 from 150 to 190 nm.
The pre-separator effectively suppressed particle bouncing on the meshes.
Particle loading had minimal influence on pressure drop and separation efficiency.
The sampler showed consistent performance with existing methods for ambient particle collection.

Conclusions:

The novel layered-mesh inertial filter is a viable tool for nano-particle collection.
The developed high-volume air sampler offers improved performance for particles in the 150-190 nm range.
This technology provides a reliable method for environmental nano-particle sampling.