Effects of simulated tri-ethylene glycol coating with soot aerosol particle change on hygroscopicity

Document Type

Article

Publication Date

4-20-2017

Abstract

In this study, the effect of tri-ethylene glycol (TEG) coating on the hygroscopicity property of soot aerosol particle was investigated. Size-classified soot aerosol from an inverted diffusion burner was coated with TEG and its properties were characterized by mass-mobility measurements using a Hygroscopic Tandem Differential Mobility Analyzer (HTDMA) coupled with an Aerosol Particle Mass analyzer (APM). Additionally, the soot aerosol sample was characterized using Scanning Electron Microscopy (SEM). Different Particle sizes, including 100nm, 200nm and 300nm, were selected into simulated TEG coating measurement. Significant restructuring of soot aggregates was observed in the presence of sub-nanometer layers of TEG. Due to the hygroscopic property of TEG and lower surface tension (σ) than water at room temperature, the presence of TEG made soot aggregates hygroscopic and further promoted their restructuring at higher relative humidity (RH). The condensation of small amounts of TEG may induce a significant restructuring of atmospheric soot aggregates, altering their properties and atmospheric impacts.

Identifier

85027708930 (Scopus)

Publication Title

Zhongguo Huanjing Kexue China Environmental Science

ISSN

10006923

First Page

1276

Last Page

1282

Issue

4

Volume

37

Grant

1463702

Fund Ref

National Science Foundation

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