SiO2/P(SMA-co-MMA-co-BA)树脂的制备及氯代烃吸附性能

Synthesis and Chlorinated Hydrocarbon Adsorption Properties of SiO2/P(SMA-co-MMA-co-BA) Resin

摘要:

采用悬浮聚合法制备了一种二氧化硅/聚(甲基丙烯酸十八烷基酯-co-甲基丙烯酸甲酯-co-丙烯酸丁酯)〔SiO2/P(SMA-co-MMA-co-BA)〕树脂，用于水体中氯代烃的吸附去除。通过单因素实验法研究了未改性SiO2粒径和改性SiO2用量对树脂吸附性能的影响，并利用FTIR、界面参数、SEM和BET等对材料的结构进行表征。结果表明：树脂对氯代烃的吸附选择性强、吸附速率快，且当负载的未改性SiO2粒径为50 nm、改性SiO2用量为丙烯酸酯单体总质量的1.5%时，改性树脂在6 h内对CH2Cl2、CHCl3、CCl4和C2Cl4的最大吸附倍率分别可以达到49.10、56.41、46.50和43.45 g/g，与未经SiO2改性的树脂相比吸附能力分别提高了62.91%、49.23%、42.86%和54.08%；并且经过10次吸脱附循环后，改性树脂对CHCl3的吸附倍率仍有50.30 g/g，与未经SiO2改性的树脂相比其再生性能提高了42.21%。

Abstract:

A silica/poly (octadecyl methacrylate-co-methyl methacrylate-co-butyl acrylate) (SiO2/P(SMA-co-MMA-co-BA)) resin was synthesized by suspension polymerization method to adsorb chlorinated hydrocarbons from wastewater. The effects of particle size of unmodified SiO2 and the dosage of modified SiO2 on the adsorption properties of the resin were investigated by single factor experiment. The structure and surface morphology of the material were characterized by FT-IR, interface parameters, SEM and BET. The results showed that the resin had strong adsorption selectivity for chlorinated hydrocarbon, and when the particle size of the unmodified SiO2 is 50 nm, the dosage of modified SiO2 is 1.5% of the total mass of acrylate monomer, the modified resin within 6 h of CH2Cl2, CHCl3, CCl4 and C2Cl4 could achieved 49.10, 56.41, 46.50 and 43.45 g/g, which was 62.91%, 49.23%, 42.86% and 54.08% higher than that of the unmodified resin. After 10 cycles of adsorption and desorption, the adsorption capacity of the modified resin for CHCl3 is still 50.30 g/g, and the regeneration capacity of the modified resin was 42.21% higher than that of the unmodified resin.