Synthesis of nanosized PAA/titania hybrid composites—Experiment and modeling

doi:10.1016/j.ceramint.2006.11.013

淡江大學機構典藏 > 工學院 > 化學工程與材料工程學系暨研究所 > 期刊論文 > Item 987654321/50481

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题名:	Synthesis of nanosized PAA/titania hybrid composites—Experiment and modeling
作者:	Chen, Hung-jen;Wang, Leeyih;Chiu, Wen-yen;董崇民;Don, Trong-ming
贡献者:	淡江大學化學工程與材料工程學系
关键词:	Sol–gel reaction;Titania;Chelation;Kinetic simulation
日期:	2008-04-01
上传时间:	2010-08-09 18:16:40 (UTC+8)
出版者:	Elsevier
摘要:	A stable colloid of nanosized PAA/titania hybrid has been successfully prepared, in which chelating bond was evidenced by FTIR spectra. Moreover, TGA curves indicated the degree of chelation to be increased with an increase of PAA content. SEM micrographs demonstrated that the size of hybrid aggregates would be smaller at increased ratio of PAA to titania, because the higher amount of PAA would decrease the degree of aggregation and inhibit the titania growth. A new sol–gel kinetic model for partially chelated titanium alkoxide by PAA has been proposed to simulate the experimental results. Based on this sol–gel kinetic model which takes into account the effect of chelation, the concentration of water, TiOR, TiOH, and (TiO)Ti bonds during sol–gel reaction could be calculated. The variation of number of particles at different reaction times could also be shown. Finally, the size of hybrid aggregates at different degrees of chelation could be qualitatively described. The simulated results from this model were in agreement with the observation from SEM micrographs.
關聯:	Ceramics International 34(3), pp.467-477
DOI:	10.1016/j.ceramint.2006.11.013
显示于类别:	[化學工程與材料工程學系暨研究所] 期刊論文

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