中国石油大学学报（自然科学版）2024，Vol.48Issue(2)：194-199,6.DOI:10.3969/j.issn.1673-5005.2024.02.022
表面活性剂改性制备负载型聚苯乙烯磺酸催化剂
Preparation of supported polystyrene sulfonate catalyst modified by surfactant
摘要
Abstract
The modification of silica gel carrier by surfactant can avoid the agglomeration of polystyrene on the surface of the carrier,and then the supported organic sulfonate solid acid catalyst was obtained by sulfonation.The obtained catalyst was characterized by specific surface area detection(BET),thermogravimetric analysis(TG),NH3 temperature programmed de-sorption(NH3-TPD),scanning electron microscopy(SEM)and elemental analysis.The preparation conditions of the cata-lyst were optimized and the performance in the synthesis of tributyl citrate was investigated.The deactivation mechanism of the catalyst was discussed as well.The results show that the polystyrene molecules are effectively dispersed on the surface of silica gel under the action of cetyltrimethylammonium chloride(CTAC),which is beneficial to the sulfonation process and the number of sulfonic acid groups increases.Under the optimum reaction conditions,the yield of tributyl citrate can reach 88.1%.The catalytic activity did not decrease significantly after six consecutive cycles,exhibiting good stability.The pre-pared catalyst has the same deactivation reason with the resin catalyst,which is caused by the loss of sulfonic acid group a-lone,and the loss of sulfonic acid groups in the prepared catalyst is much lower than that in the resin catalyst.关键词
硅胶/表面活性剂/聚苯乙烯/固体酸/柠檬酸三丁酯Key words
silica/surfactant/polystyrene/solid acid/tributyl citrate分类
化学工程引用本文复制引用
高强,祁娟,张明锦,邓晓明,徐永强,商红岩,刘晨光..表面活性剂改性制备负载型聚苯乙烯磺酸催化剂[J].中国石油大学学报（自然科学版）,2024,48(2):194-199,6.基金项目
教育部"春晖计划"合作科研项目(202200313) （202200313）
青海省自然科学基金项目(2024-ZJ-995) （2024-ZJ-995）
