富羟基超交联聚合物的制备及其对吡啶的吸附性能

Preparation and adsorption properties of hydroxyl riched hypercrosslinked polymers

水热条件下,采用浓盐酸作催化剂,对苯二酚与甲醛一步缩聚,制备富羟基超交联聚合物(HRHCPs)(比表面积852. 03 m2/g,孔径分布集中于2 nm左右,酚羟基含量6. 173 mmol/g),测定了不同温度下HRHCPs和XAD-4对水溶液中吡啶的吸附性能,并用Langmuir和Freundlich方程进行了拟合。结果表明,HRHCPs对吡啶具有较大的吸附量和较快的吸附速率,其吸附过程是自发进行的吸热过程。

Hydroxyl riched hypercrosslinked polymers(HRHCPs)were prepared by the polycondensation of hydroquinone and formaldehyde,with hydrochloric acid as catalyzer under hydrothermal conditions.The specific surface area of HRHCPs can reach 852.03 m 2/g,the pore size is concentrated at 2 nm,and the content of phenolic hydroxyl is 6.173 mmol/g.The adsorption properties of HRHCPs and XAD-4 for pyridine in aqueous solution were measured at different temperatures,the Langmuir and Freundlich equations are used to fit it.The results show that HRHCPs has a larger adsorption capacity and faster adsorption rate for pyridine,the adsorption process is a spontaneous endothermic process.