SANS study of the structural evolution in NIPA/SA gel on dehydration
SANS study of the structural evolution in NIPA/SA gel on dehydration
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NIPA/SA 凝胶脱水后结构演化的 SANS 研究
DOI：
10.1007/s003390201518
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
K. Hara
中科院分区：
文献类型：
--
作者：
M. Sugiyama;M. Annaka;Y. Maeda;K. Hara
用小角中子散射（SANS）方法研究了不同含水量的N-异丙基丙烯酰胺/丙烯酸钠（NIPA/SA）凝胶的介观结构，以了解其脱水过程中的结构演变。随着凝胶中含水量的降低，SANS剖面的演化可分为三个阶段。在开始时，没有峰在SANS配置文件中，除了中央部分，这稳步加强。随着水分的进一步消散，在0.02 μ m-1附近出现一个侧峰，其强度在达到一定含水量后逐渐增大，然后减小。这些结果表明，在NIPA/SA凝胶中的水耗散不均匀地发生。
Mesoscopic structures of N-isopropylacryl-amide/sodium acrylate (NIPA/SA) gels with several water contents were investigated with a small-angle neutron scattering (SANS) method in order to make clear their structural evolution on dehydration. The evolution of the SANS profile with a decrease in the water content in the gel could be classified into three stages. In the beginning, there was no peak in the SANS profile except for the central part, which steadily intensified. With the further water dissipation, a side peak appeared at around 0.02 Å-1, the intensity of which increased up to a certain water content and then decreased. These results indicate that the water dissipation in the NIPA/SA gel occurs inhomogeneously.