Two novel polytitanium precursors containing linear Ti–(OH)2–Ti chains applied for the preparation of titanium dioxide fibers
Two novel polytitanium precursors containing linear Ti–(OH)2–Ti chains applied for the preparation of titanium dioxide fibers
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DOI：
10.1007/s00339-015-9468-6
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发表时间：
2015-09
期刊：
影响因子：
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通讯作者：
N. Cai;Xinqiang Wang;Daidong Guo;Luyi Zhu;Kangkang Yuan;Xue-ni Lin;Guanghui Zhang;X. Duan
中科院分区：
文献类型：
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作者：
N. Cai;Xinqiang Wang;Daidong Guo;Luyi Zhu;Kangkang Yuan;Xue-ni Lin;Guanghui Zhang;X. Duan
采用复分解缩聚法合成了两种可用于制备TiO 2纤维的新型前驱体聚乙酰丙酮钛（PAT）和聚乙酸钛（PET）。采用溶胶-凝胶干法纺丝法制备了聚对苯二甲酸乙二酯（PAT）和聚酯（PET）纤维。纤维直径在2-20 μm之间，纤维质量好，数量多。通过元素分析、X射线荧光光谱、红外光谱、核磁共振分析和热分析对前驱体的结构进行了表征和分析。PAT和PET都是含有Ti（OH）2 Ti链的线型聚合物。钛原子的配位数为8。每个钛原子与六个-OH和一个CH 3-CO−=C-CO-CH 3（PAT）或CH 3-COO−（PET）配位。该前驱体纤维可用于在500 °C下制备TiO 2纤维。TiO 2纤维具有良好的光催化降解活性。
Two novel precursors, polyacetylacetonatotitanium (PAT) and polyacetictitanium (PET), which can be applied for the preparation of TiO2fibers, were synthesized by metathetical polycondensations. The fibers of PAT and PET were prepared by sol–gel dry-spinning method. The high-quality and plentiful precursor fibers were easily collected with the diameter of 2–20 μm. The structures of the precursors were characterized and analyzed by elemental analyses, X-ray fluorescence spectrometry, infrared spectral analysis, nuclear magnetic resonance analysis, and thermal analyses. Both PAT and PET are the linear polymers containing Ti(OH)2Ti chains. The coordination number of titanium atom is 8. And each titanium atom is coordinated with six –OHs and one CH3–CO−=C–CO–CH3(for PAT) or CH3–COO−(for PET). The precursor fibers can be used to prepare TiO2fibers at 500 °C. The TiO2fibers exhibit fine photocatalytic degradation activities.