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首页> 外文期刊>International Journal of Electrochemical Science >The Role of Eliminating PEG from PEG/MCM-41 Composite on the Structural, Textural and Electrical Conductivity Properties of MCM-41
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The Role of Eliminating PEG from PEG/MCM-41 Composite on the Structural, Textural and Electrical Conductivity Properties of MCM-41

机译：从PEG / MCM-41复合物中消除PEG对MCM-41的结构，结构和电导率特性的作用

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摘要

A PEG/MCM-41 composite was synthesized by a simple solution method with polyethylene glycol(PEG) and mesoporous MCM-41. The thermal behavior of the composite was studied usingthermogravimetric analysis (TGA) and an in situ electrical conductivity measurement. The resultsshowed that polymer degradation occurs in the temperature range of 300 to 550 C, and isaccompanied by a decrease in the electrical conductivity. Thus, to elucidate the influence of polymerelimination on the structural, textural and electrical conductivity properties of MCM-41, a sample wasprepared by calcining the PEG/MCM-41 composite for 3 h at 550 C in air. Various physico-chemicaltechniques such as XRD, FT-IR, FE-SEM and N2 physisorption, were used for characterization. It wasshown that the calcined solid still exhibits the mesoporous MCM-41 framework with poor ordering. Atexture analysis revealed that the PEG/MCM-41 composite formation and the subsequent PEGelimination are accompanied by a loss of the type IV character of the MCM-41 and a sharp decrease inthe textural parameters. The observed meso-porosity loss of the MCM-41 as a result of adding andthen eliminating the PEG molecules was accompanied by a reduction of the conductivity.
机译：通过简单的溶液法用聚乙二醇（PEG）和中孔MCM-41合成了PEG / MCM-41复合材料。使用热重分析（TGA）和原位电导率测量研究了复合材料的热行为。结果表明，聚合物的降解发生在300到550°C的温度范围内，并且伴随着电导率的降低。因此，为了阐明聚合消除对MCM-41的结构，质构和电导率特性的影响，通过将PEG / MCM-41复合材料在550°C的空气中煅烧3小时来制备样品。表征采用了各种物理化学技术，如XRD，FT-IR，FE-SEM和N2物理吸附。结果表明，煅烧的固体仍然显示出有序的中孔MCM-41骨架。织构分析表明，PEG / MCM-41复合物的形成和随后的PEG消除伴随着MCM-41 IV型特征的丧失和织构参数的急剧下降。由于添加然后消除了PEG分子而观察到的MCM-41的介孔孔隙度损失伴随着电导率的降低。

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