Determination of mean diameter and particle size distribution of acrylate latex using flow-field flow fractionation, photon correlation spectroscopy, and electron microscopy

被引:52
作者
Lee, S
Rao, SP
Moon, MH
Giddings, JC
机构
[1] KANGNUNG NATL UNIV, DEPT CHEM, KANGNUNG 210742, SOUTH KOREA
[2] UNIV UTAH, DEPT CHEM, SALT LAKE CITY, UT 84112 USA
关键词
D O I
10.1021/ac9511814
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Flow held-flow fractionation (flow FFF) was employed to determine the mean diameter and the size distribution of acrylate latex materials having diameters ranging from 0.05 to 1 mu m. Mean diameters of the samples determined by now FFF are in good agreement with those obtained from photon correlation spectroscopy(PCS). Scanning electron microscopy (SEM) yielded a mean diameter that is about 20% lower than those obtained from now FFF or PCS, probably due to the shrinkage of particles during sample drying and high-vacuum measurements. It was found that now FFF is particularly useful for the determination of particle size distributions of latex materials having broad size distributions. Flow FFF separates particles according to their sizes and yields an elution curve that directly represents the particle size distribution of the sample. In PCS, measurements had to be repeated at more than one scattering angle to obtain an accurate mean diameter for the latex having a broad size distribution. mow FFF was fast (less than 12 min of run time) and showed an excellent repeatability in measuring the mean diameter with +/-5% relative error.
引用
收藏
页码:1545 / 1549
页数:5
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