pH对SiO2-ZrO2复合溶胶稳定性的影响
Effect of pH on Stability of SiO2-ZrO2 Composite Sol
刘春杰 1田妮 1王齐 1葛登文1
作者信息
- 1. 营口理工学院化学与环境工程学院,辽宁 营口 115014
- 折叠
摘要
以氧氯化锆(ZrOCl2·8H2O)和正硅酸四乙酯(TEOS)为前驱体,无水乙醇为溶剂,盐酸或氨水为催化剂,四乙基溴化铵(TEAB)和N,N-二甲基甲酰胺(DMF)为模板剂,采用溶胶凝胶法制备复合溶胶.重点考察pH与锆含量、模板剂对溶胶稳定性的影响规律.实验结果表明:盐酸催化的溶胶稳定性要优于氨水催化的溶胶;加入TEAB的溶胶稳定性要好于无模板剂和加入DMF的;随着pH的降低,溶胶陈化时间出现先上升后降低的趋势,pH在 3附近出现溶胶稳定性的最高极值;正交实验表明,各因素影响权重由大到小顺序为:pH、锆含量、乙醇含量、模板剂.
Abstract
The composite sol was prepared by sol-gel method using ZrOCl2·8H2O and TEOS as precursors,anhydrous ethanol as solvent,hydrochloric acid or ammonia as catalyst,tetraethyl ammonium bromide(TEAB)and N,N-dimethyl formamide(DMF)as template.The effects of pH,zirconium content and template on the stability of sol were investigated.The results showed that the stability of sol prepared with hydrochloric acid as catalyst was better than that prepared with ammonia water as catalyzst,the stability of sol prepared with TEAB as template was better than that prepared without template agent and with DMF as template.With the decrease of pH,the aging time of sol first rose and then decreased,and the maximum value of sol stability occurred around pH=3.The orthogonal experiment result showed that the order of influence weight of each factor from big to small was as follows pH,zirconium content,ethanol content,template.
关键词
pH/溶胶-凝胶法/陈化时间/复合溶胶/稳定性Key words
pH/Sol-gel method/Aging time/Composite Sol/Stability引用本文复制引用
出版年
2024
NETL
NSTL
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