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首页> 外文会议>International Conference on Surface and Colloid Science; 200309; Brazil >Intercalation of dendrimers in the interlayer of hydrotalcite clay sheets
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Intercalation of dendrimers in the interlayer of hydrotalcite clay sheets

机译：树枝状聚合物在水滑石粘土片层间的嵌入

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Nanocomposites have been prepared through the intercalation of poly(amido amine) dendrimers with carboxylate terminals into hydrotalcite clays. The formation of nanocomposites by anion exchange during incubating at 70℃ was investigated at various compositions with increasing dendrimer content in water and was assessed by Fourier transform IR absorption spectros-copy, X-ray diffraction, small-angle X-ray scattering, and elemental analysis. The dendrimer diffused into the clay galleries: the spacing between the clay layers (sheets) increased from its intrinsic value of 3.2 to 20-23 A, and the mass fraction of the dendrimer in the composite was around 0.50 for mixing ratios (charge of clay to carboxylate of the dendrimer) higher than 1:2, indicating the saturated intercalation of the dendrimer in the clay. The dendrimers are densely packed with an ellipsoidal structure in the inter-layer. At a mixing ratio of 1:8, there was excess adsorption of the dendrimer on the clay surface besides the intercalation and initial adsorption.
机译：通过将具有羧酸根末端的聚（酰胺胺）树状聚合物插入水滑石粘土中来制备纳米复合材料。研究了在70℃下孵育过程中阴离子交换形成的纳米复合物的组成，其中各种成分的树枝状聚合物含量都在增加，并通过傅里叶变换红外吸收光谱，X射线衍射，小角X射线散射和元素分析进行​​了评估。分析。树枝状聚合物扩散到粘土通道中：粘土层（片层）之间的间距从其固有值增加到3.2至20-23 A，并且混合比例下，树枝状聚合物在复合材料中的质量分数约为0.50（粘土电荷） （树枝状聚合物的羧酸根）大于1：2，表明树枝状聚合物在粘土中的饱和嵌入。树枝状聚合物在层间密集地堆积有椭圆形结构。在1：8的混合比下，除了插层和初始吸附之外，树枝状大分子在粘土表面上的过量吸附。

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