Determination of Mean Diameter and Particle Size Distribution of Acrylate Latex Using Flow Field-Flow Fractionation, Photon Correlation Spectroscopy, and Electron Microscopy
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- 作者：Seungho Lee ; S. Prabhakara Rao ; Myeong Hee Moon ; and J. Calvin Giddings
- 刊名：Analytical Chemistry
- 出版年：1996
- 出版时间：May 1, 1996
- 年：1996
- 卷：68
- 期：9
- 页码：1545 - 1549
- 全文大小：214K
- 年卷期：v.68,no.9(May 1, 1996)
- ISSN：1520-6882
文摘
Flow field-flow fractionation (flow FFF) was employed todetermine the mean diameter and the size distribution ofacrylate latex materials having diameters ranging from0.05 to 1 
m. Mean diameters of the samplesdeterminedby flow FFF are in good agreement with those obtainedfrom photon correlation spectroscopy (PCS). Scanningelectron microscopy (SEM) yielded a mean diameter thatis about 20% lower than those obtained from flow FFF orPCS, probably due to the shrinkage of particles duringsample drying and high-vacuum measurements. It wasfound that flow FFF is particularly useful for the determination of particle size distributions of latex materialshaving broad size distributions. Flow FFF separatesparticles according to their sizes and yields an elutioncurve that directly represents the particle sizedistributionof the sample. In PCS, measurements had to berepeatedat more than one scattering angle to obtain an accuratemean diameter for the latex having a broad size distribution. Flow FFF was fast (less than 12 min of run time)and showed an excellent repeatability in measuring themean diameter with ±5% relative error.
m. Mean diameters of the samplesdeterminedby flow FFF are in good agreement with those obtainedfrom photon correlation spectroscopy (PCS). Scanningelectron microscopy (SEM) yielded a mean diameter thatis about 20% lower than those obtained from flow FFF orPCS, probably due to the shrinkage of particles duringsample drying and high-vacuum measurements. It wasfound that flow FFF is particularly useful for the determination of particle size distributions of latex materialshaving broad size distributions. Flow FFF separatesparticles according to their sizes and yields an elutioncurve that directly represents the particle sizedistributionof the sample. In PCS, measurements had to berepeatedat more than one scattering angle to obtain an accuratemean diameter for the latex having a broad size distribution. Flow FFF was fast (less than 12 min of run time)and showed an excellent repeatability in measuring themean diameter with ±5% relative error.