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首页> 外文期刊>Journal of Applied Polymer Science >Photon transmission technique for monitoring drying processes in acrylamide gels formed with various crosslinker contents
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Photon transmission technique for monitoring drying processes in acrylamide gels formed with various crosslinker contents

机译：光子传输技术可监测具有各种交联剂含量的丙烯酰胺凝胶的干燥过程

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摘要

In situ photon transmission experiments were performed using UV-visible (UVV) spectrometer during the drying of polyacrylamide (PAAm) gels. These gels are formed from acrylamide (AAm) with various N,N' -methylenebis(acrylamide) (Bis) contents by free radical crosslinking copolymerization (FCC) in water. The transmitted light intensity, I-sc increased continuously as PAAm gels are dried. Increase in I,, was attributed to the decrease in the scattered light intensity, I-sc, which might be originated from the contrast between "frozen blob clusters" and holes in the drying gel. Decrease in I-sc was modeled using Rayleigh's equation, where drying times with various exponents were found to be proportional to the volume of frozen blob clusters. It was observed that the radius of frozen blob cluster (correlation length), xi (c) increased in various power of time, depending on Bis contents during drying of gels. (C) 2001 John Wiley & Sons, Inc. [References: 32]
机译：在聚丙烯酰胺（PAAm）凝胶干燥过程中，使用UV-可见（UVV）光谱仪进行了原位光子透射实验。这些凝胶是通过水中的自由基交联共聚（FCC）由具有各种N，N'-亚甲基双（丙烯酰胺）（Bis）含量的丙烯酰胺（AAm）形成的。随着PAAm凝胶的干燥，透射光强度I-sc连续增加。 I的增加归因于散射光强度I-sc的降低，其可能源于“冷冻斑点团”和干燥凝胶中孔之间的对比。 I-sc的减少是使用瑞利方程建模的，其中发现各种指数的干燥时间与冷冻的斑点簇的体积成正比。观察到，冻干斑点簇的半径（相关长度）xi（c）在不同的时间幂上增加，这取决于凝胶干燥过程中的Bis含量。 （C）2001 John Wiley＆Sons，Inc. [参考：32]

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