以废塑料为基材的大孔型离子交换树脂的制备、表征和吸附性能

Preparation, characterization and adsorption properties of macroporous ion exchange resin based on waste plastics

以废旧电视机外壳(WTVS)为原料,通过磺化反应和溶胀-渗透方法来制备大孔型离子交换树脂(SMD001),并将其作为CO2吸附材料的载体,采用N2吸附-脱附、傅里叶变换红外光谱(FT-IR)、热重分析(TGA)、扫描电镜(SEM)、压汞法等手段对大孔型离子交换树脂(SM-D001)进行表征。考察了不同正庚烷的量、不同乙醇/水质量比和不同致孔时间下制备的SM-D001对CO2吸附能力的影响。结果表明,当致孔剂正庚烷的量为25 g,乙醇/水质量比为90∶10,致孔时间为5 h时,制备的离子交换树脂对CO2的平衡吸附量达到1.87mmol·g^-1。以SM-D001为载体,五乙烯六胺(PEHA)为改性剂,采用配位法制备的固态胺吸附剂对CO2的吸附能力达到3.61 mmol·g-1,并对其进行吸附动力学研究。上述研究结果为进一步证明固态胺吸附剂对CO2吸附过程是物理吸附和化学吸附共同作用的结论提供参考。

The macroporous ion exchange resin(SM-D001)was prepared by a sulfonation reaction and a swelling-infiltration method using a waste television shell(WTVS)as a raw material,and as a carrier of a CO2 adsorption material,the SM-D001 were characterized by nitrogen adsorption-desorption,fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TGA)techniques,scanning electron microscopy(SEM)and mercury injection.The effects of SM-D001 prepared with different amounts of n-heptane,different ethanol/water mass ratios and different pore-forming times on CO2 adsorption capacity were investigated.The results showed that when the amount of pore-forming agent n-heptane was 25 g,the ethanol/water mass ratio was 90:10,and the pore-forming time was 5 h,the equilibrium adsorption capacity of the prepared ion exchange resin for CO2 reached 1.87 mmol·g^-1.The solid amine adsorbents were prepared by using coordination method with SM-D001 as carrier and with penta ethylene hexamine(PEHA)as modifier,and the maximum CO2 adsorption capacity is 3.61 mmol·g^-1,and adsorption kinetics was studied to providing reference for further proving that the adsorption process of solid amine adsorbent on CO2 was a combination of physical adsorption and chemical adsorption.