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首页> 外文期刊>Journal of Applied Polymer Science >Fabrication of MoO3/TiO2-SiO2 with hollow spherical shape using resin as the template: Effect of decomposition of resins
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Fabrication of MoO3/TiO2-SiO2 with hollow spherical shape using resin as the template: Effect of decomposition of resins

机译：使用树脂作为模板的空心球形制造MOO3 / TiO2-SiO2：树脂分解的影响

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摘要

Anion exchange resins are widely used in template synthesis of oxide composites. The present work is aimed to study the thermal destruction of anion exchangers with divinyl-benzene and polyacrylate matrices in order to obtain hollow spherical MoO3/TiO2-SiO2 composites from these resins preliminarily saturated with paramolybate ion and coated with tetrabutoxytitanium sol with tetroethoxysilane. It is shown that the processes of resins decomposition affect the strength of spherical composites. Decomposition of the resin with a polyacrylate matrix, accompanied by random nucleation and burnout of the organic matrix at 350 degrees C, leads to the formation of spherical oxide composites with cracks on the surface. The decomposition reactions of the resin with a divinylbenzene matrix occurring at the boundaries of the phases of cylindrical and spherical symmetry, as well as a lower burnout temperature of the organic matrix (290 degrees C), contribute to the formation of dense MoO3/TiO2-SiO2 spheres. Hollow spherical composites 0.3-0.5 mm in size are orthorhombic alpha-MoO3 coated with a mixture of titanium dioxide with anatase structure and amorphous silicon dioxide.
机译：阴离子交换树脂广泛应用于氧化物复合材料的模板合成。本工作旨在研究二乙烯基苯和聚丙烯酸酯基质的阴离子交换剂的热破坏，以便从这些树脂中获得空心球形MoO3/TiO2-SiO2复合材料，这些树脂初步饱和了副钼酸盐离子，并涂有四丁氧基钛溶胶和四乙氧基硅烷。结果表明，树脂的分解过程影响球形复合材料的强度。树脂与聚丙烯酸酯基体的分解，伴随着350℃下有机基体的随机成核和烧损，导致形成表面有裂纹的球形氧化物复合材料。树脂与二乙烯基苯基质的分解反应发生在圆柱形和球形对称相的边界，以及有机基质的较低燃尽温度（290摄氏度），有助于形成致密的MoO3/TiO2-SiO2球体。尺寸为0.3-0.5 mm的空心球形复合材料是正交α-MoO3，涂有锐钛矿结构的二氧化钛和非晶二氧化硅的混合物。

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