Wang Chuanhong, Chen Xuefang, Yao Shimiao, Peng Fen, Xiong Lian, Guo Haijun, Zhang Hairong, Chen Xinde
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China.
Langmuir. 2024 Jun 18;40(24):12465-12474. doi: 10.1021/acs.langmuir.4c00863. Epub 2024 Jun 10.
Polymerization confined to the pore was first adapted for the nanoscale structure adjustment of adsorption resin. The self-cross-linked polymer (P-1) formed in the pore of hyper-cross-linked resin (HR) by the Friedel-Crafts reaction of p-dichloroxylene (p-DCX), occupying the macropore of the HR resin and bringing about an external micropore. Compared with the raw HR resin, the volume of the micropore of HR@P-1 in 0.4 < D < 1 nm increased but the volume of the macropore has obviously decreased. After the loading of P-1 in the nanopore of HR, HR@P-1 has better gas adsorption performance. At 298 and 100 KPa, the adsorption capacity of CO is almost 30% higher than that of HR, reaching 35.7 cm/g, due to the increase in the smaller micropore volume. Moreover, HR@P-1 has also been found to be the first CH-selective adsorption resin. The uptake of CH is up to 56 cm/g, and the IAST selectivity of CH/CH reaches 15.3. HR@P-1 can also separate syngas efficiently at ambient temperature and be regenerated by simple vacuum operation.
局限于孔内的聚合反应最初被应用于吸附树脂的纳米级结构调整。对二氯苯（p-DCX）通过傅-克反应在高交联树脂（HR）的孔内形成自交联聚合物（P-1），占据了HR树脂的大孔并产生了外部微孔。与原始HR树脂相比，HR@P-1在0.4<D<1nm范围内的微孔体积增加，但大孔体积明显减小。在HR的纳米孔中负载P-1后，HR@P-1具有更好的气体吸附性能。在298K和100kPa下，由于较小微孔体积的增加，CO的吸附容量比HR高出近30%，达到35.7cm/g。此外，HR@P-1还被发现是第一种对CH具有选择性吸附的树脂。CH的吸附量高达56cm/g，CH/CH的IAST选择性达到15.3。HR@P-1在常温下也能高效分离合成气，并可通过简单的真空操作进行再生。
