Intercalation compounds of a synthetic alkylammonium-smectite with alkanolamines and their unique humidity response properties
Intercalation compounds of a synthetic alkylammonium-smectite with alkanolamines and their unique humidity response properties
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合成烷基铵蒙皂石与链烷醇胺的插层化合物及其独特的湿度响应特性
DOI：
10.1016/j.clay.2014.11.013
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发表时间：
2015
影响因子：
5.6
通讯作者：
and T. Ando
中科院分区：
文献类型：
--
作者：
K. Fujii;H. Hashizume;S. Shuichi;K. Ariga;and T. Ando
将三乙醇胺（TEA）和二乙基乙醇胺（DEEA）引入合成烷基铵蒙皂石（Synth A-Sm）的层间空间，以制备新型插层化合物。 Synth A-Sm 中的无机和有机部分彼此共价键合。制备的插层化合物（Synth A-Sm TEA 和 DEEA）表现出独特的湿度响应。针对烷醇胺的嵌入，测试了多种制备条件。然后发现，从室温 (RT) 到 180 °C，嵌入是通过 20–375 mmol/g 的烷醇胺/合成 A-Sm 比例实现的。 X 射线衍射 (XRD) 分析表明，通过在 Synth A-Sm 的层间插入 TEA 或 DEEA，基底间距增加。基底间距与 x 无关，表明 TEA 插层小于或等于饱和值。 Synth A-Sm 的层间空间并没有随着 TEA 的引入而无限膨胀。对于 Synth A-Sm TEA 化合物，在干燥氮气流下，基础间距没有变化。另一方面，在 Synth A-Sm DEEA 化合物的情况下，在干燥氮气流下，基底间距减小。 DEEA 在室温下氮气流下很容易脱嵌。所制备的插层化合物的傅里叶变换红外（FT-IR）光谱是Synth A-Sm 和客体烷醇胺（TEA 或DEEA）的光谱的简单叠加。在受控的相对湿度下对制备的Synth A-Sm TEA 化合物进行了表征。 XRD 测量表明基底间距与相对湿度无关。然而，随着相对湿度的增加，Synth A-Sm TEA 化合物的 X 射线反射急剧减弱。 XRD 分析是在重复的加湿-干燥循环下进行的。 XRD 结果表明，独特的湿度响应是可逆的。
Triethanolamine (TEA) and diethylethanolamine (DEEA) were introduced into the interlayer space of a synthetic alkylammonium smectite (Synth A-Sm) in order to prepare novel intercalation compounds. The inorganic and organic moieties bond covalently with each other in Synth A-Sm. The intercalation compounds prepared (Synth A-Sm TEA and DEEA) showed unique humidity response. A wide range of preparation conditions was tested for the intercalation of the alkanolamines. Then it was revealed that the intercalation was achieved with alkanolamines/Synth A-Sm ratiosxof 20–375 mmol/g from room temperature (RT) to 180 °C. X-ray diffraction (XRD) analysis showed that the basal spacing increased by the intercalation of TEA or DEEA in the interlayer space of the Synth A-Sm. The basal spacing was independent ofx, indicating that TEA was intercalated less than or equal to the saturation value. The interlayer space of Synth A-Sm did not infinitely swell with the introduction of TEA. The basal spacing did not change under dry nitrogen flow in the case of the Synth A-Sm TEA compounds. On the other hand, the basal spacing decreased under dry nitrogen flow in the case of Synth A-Sm DEEA compounds. DEEA easily deintercalated under nitrogen flow at RT. Fourier transform infrared (FT-IR) spectra of the prepared intercalation compounds were simple superimpositions of the spectra of Synth A-Sm and the guest alkanolamines (TEA or DEEA).The Synth A-Sm TEA compounds prepared were characterized under controlled relative humidity. The XRD measurements indicated that the basal spacing was independent of the relative humidity. However, as relative humidity increased, the X-ray reflections from the Synth A-Sm TEA compounds drastically weakened. The XRD analysis was performed under repeated humidification-drying cycles. The XRD results revealed that the unique humidity response is reversible.