天然膨润土-聚(乙二醇)复合材料的制备与表征:对聚合物密度函数进行精确理论研究

IF 3.8 Q2 CHEMISTRY, PHYSICAL Chemical Physics Impact Pub Date : 2024-07-09 DOI:10.1016/j.chphi.2024.100673
A. Seidi , M. Benhamou , D. Khalil , M. Aalaoul , M. Naciri Bennani
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引用次数: 0

摘要

这项工作的第一个目的是对天然膨润土-聚乙二醇复合材料的基底间距和 X 射线衍射峰的特征(位置、强度、晶体大小......)与聚合物密度的关系进行系统的实验和理论研究。天然膨润土是从摩洛哥东里夫链(纳多尔市附近)的一个矿床中提取的。首先使用 X 射线衍射(XRD)方法测量了未加工膨润土的基底距离和衍射峰特征,其次测量了膨润土-聚乙二醇复合材料的基底距离和衍射峰特征。测量结果特别显示,复合材料中存在一系列不同大小的蒙脱石相(结晶体)。随后,我们基于重正化理论开发了一种强大的理论方法,并获得了相关物理量的精确比例关系。我们将理论预测结果与所考虑的天然膨润土-聚乙二醇复合材料的实验数据进行了比较,发现理论与实验结果非常吻合。此外,作为实验研究的补充,我们使用所谓的傅立叶变换红外光谱(FTIR)工具对纯 PEG、天然膨润土和膨润土-PEG 复合材料进行了详细分析。对这些复合物的比较表明,聚合物密度对拉伸和弯曲振动模式有很大影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Elaboration and characterization of a natural bentonite-poly(ethylene glycol) composite: Development of an exact theoretical study in function of the polymer-density

The first aim of this work was a systematic experimental and theoretical study of the basal-spacing and characteristics of X-rays diffraction-peaks (positions, intensities, crystallites size...), versus the polymer-density, for a natural bentonite-poly(ethylene glycol) composite. The natural bentonite was extracted from a deposit located in Eastern Rif chain of Morocco (near Nador-city). The basal distance and diffraction-peaks characteristics were measured using X-Rays Diffraction (XRD) method, first, for raw bentonite, and second, for bentonite-poly(ethylene glycol) composites. In particular, measurements reveal the existence of a series of montmorillonite-phases (crystallites) of different sizes within the composites. Afterwards, we have developed a powerful theoretical approach based on Renormalization Theory, and obtain exact scaling relations for the physical quantities of interest. We have compared our theoretical predictions with our experimental data dealt with the considered natural bentonite-poly(ethylene glycol) composites, and found that theory and experiment are in good agreement. Also, as a complementary experimental study, we achieved a detailed analysis of pure PEG, natural bentonite and Bentonite-PEG composites using the so-called Fourier Transform Infrared Spectroscopy (FTIR) tool. A comparison between these complexes show that the polymer-density affects drastically the stretching and bending vibration modes.

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来源期刊
Chemical Physics Impact
Chemical Physics Impact Materials Science-Materials Science (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
65
审稿时长
46 days
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