气候变化领域集成服务门户(CCPortal): Toward closure between predicted and observed particle viscosity over a wide range of temperatures and relative humidity

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DOI	10.5194/acp-21-1127-2021
	Toward closure between predicted and observed particle viscosity over a wide range of temperatures and relative humidity
	Kasparoglu S.; Li Y.; Shiraiwa M.; Petters M.D.
发表日期	2021
ISSN	1680-7316
起始页码	1127
结束页码	1141
卷号	21 期号:2
英文摘要	Atmospheric aerosols can exist in amorphous semi-solid or glassy phase states whose viscosity varies with atmospheric temperature and relative humidity. The temperature and humidity dependence of viscosity has been hypothesized to be predictable from the combination of a water organic binary mixing rule of the glass transition temperature, a glass-transition-temperature-scaled viscosity fragility parameterization, and a water uptake parameterization. This work presents a closure study between predicted and observed viscosity for sucrose and citric acid. Viscosity and glass transition temperature as a function of water content are compiled from literature data and used to constrain the fragility parameterization. New measurements characterizing viscosity of sub-100 nm particles using the dimer relaxation method are presented. These measurements extend the available data of temperature- and humidity-dependent viscosity to 28 °C. Predicted relationships agree well with observations at room temperature and with measured isopleths of constant viscosity at 107 Pa s at temperatures warmer than 28 °C. Discrepancies at colder temperatures are observed for sucrose particles. Simulations with the kinetic multi-layer model of gas particle interactions suggest that the observed deviations at colder temperature for sucrose can be attributed to kinetic limitations associated with water uptake at the timescales of the dimer relaxation experiments. Using the available information, updated equilibrium phase-state diagrams (80 °C T 40 °C, temperature, and 0% RH 100%, relative humidity) for sucrose and citric acid are constructed and associated equilibration timescales are identified. © 2021 Georg Thieme Verlag. All rights reserved.
语种	英语
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/168809
作者单位	Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC 27695-8208, United States; Department of Chemistry, University of California, Irvine, Irvine, CA 92625, United States
推荐引用方式 GB/T 7714	Kasparoglu S.,Li Y.,Shiraiwa M.,et al. Toward closure between predicted and observed particle viscosity over a wide range of temperatures and relative humidity[J],2021,21(2).
APA	Kasparoglu S.,Li Y.,Shiraiwa M.,&Petters M.D..(2021).Toward closure between predicted and observed particle viscosity over a wide range of temperatures and relative humidity.Atmospheric Chemistry and Physics,21(2).
MLA	Kasparoglu S.,et al."Toward closure between predicted and observed particle viscosity over a wide range of temperatures and relative humidity".Atmospheric Chemistry and Physics 21.2(2021).