摘要
通过烷基化反应和简单的一锅法将醇胺离子液体(TEA)嫁接到氯甲基聚苯乙烯(PS-Cl)微球上,将形成的嫁接型离子液体催化剂(PS-[TEA]I)用于催化CO2和环氧化物生成环状碳酸酯的反应.采用傅里叶变换红外光谱(FT-IR)和扫描电子显微镜(SEM)表征催化剂的结构和形貌,采用X射线光电子能谱(XPS)、元素分析(EA)和热重分析(TGA)研究了醇胺离子液体的嫁接量和热稳定性.在环加成反应中,该催化剂无需溶剂和助催化剂,在催化剂用量为0.10 g、温度为120℃、CO_(2)压力为2 MPa以及反应时间为4 h的条件下,碳酸丙烯脂(PC)的产率达到93.30%,并且反应后容易分离,可重复使用.最后提出了羟基形成的氢键可激活环氧化物和I-亲核进攻促进开环的反应机理.
The alcohol amine ionic liquid(TEA)was grafted onto chloromethyl polystyrene(PS-Cl)microspheres through alkylation reaction and the simple one-pot method and the resulting ionic liquid-supported catalyst(PS-[TEA]I)was used to catalyze the formation of cyclic carbonates from carbon dioxide and epoxides.The structure and morphology of the catalyst were characterized with the Fourier transform infrared spectroscopy(FT-IR)and the scanning electron microscope(SEM).The grafting amount and the thermal stability of alcohol amine ionic liquids were studied with the X-ray photoelectron spectroscopy(XPS),the elemental analysis(EA)and the thermogravimetric analysis(TGA).In the cycloaddition reaction,the catalyst did not require solvents and co-catalysts.Under the experimental conditions of catalyst dosage of 0.10 g,120℃temperature,2 MPa CO_(2) pressure and 4 h reaction time,the yield of propylene carbonate(PC)reached 93.30%.It was easy to separate after the reaction and could be reused.The reaction mechanism of hydrogen bond formed with hydroxyl activating epoxide and I-nucleophilic attack to promote ring opening was finally proposed.
作者
卢金凯
张梦
初秉宪
金理健
肖健泽
李斌
董丽辉
范闽光
LU Jinkai;ZHANG Meng;CHU Bingxian;JIN Lijian;XIAO Jianze;LI Bin;DONG Lihui;FAN Minguang(School of Chemistry and Chemical Engineering, Guangxi University∥Guangxi Key Laboratory of Petrochemical Resources Processing and Process Intensification Technology, Nanning 530004, China)
出处
《华南师范大学学报（自然科学版）》
CAS
北大核心
2021年第6期43-49,共7页
Journal of South China Normal University(Natural Science Edition)
基金
国家自然科学基金项目(21968002)
广西石化资源加工及过程强化技术重点实验室项目(2019k006)。
关键词
二氧化碳的固定
醇胺离子液体
非均相催化
聚苯乙烯
环状碳酸酯
carbon dioxide fixation
alcohol amine ionic liquid
heterogeneous catalysis
polystyrene
cyclic carbonate
作者简介
通信作者:范闽光,Email:fanmg@gxu.edu.cn.
