CAJ | 학술논문

用巯丙基硅氧烷对磁性介孔硅胶改性，并通过烯丙基官能化离子液体的双键与巯基之间的自由基加成反应将具有不同侧链烷基的离子液体负载到磁性介孔硅胶表面，制备了磁性介孔硅胶负载碱性离子液体催化剂。采用红外光谱分析、X射线衍射、有机元素分析、氮气物理吸附/脱附分析和样品振动磁强计对催化剂的结构和磁性能进行了表征，最后通过催化三油酸甘油酯与甲醇酯交换反应对其催化性能进行了评价。结果表明，随着离子液体侧链烷基碳个数的增多，磁性介孔硅胶负载离子液体催化剂的离子液体负载量降低，比表面积和孔体积降低。当离子液体侧链烷基为辛基、十二烷基或十六烷基时，油酸甲酯产率均高于95%，并且反应3次后油酸甲酯产率依然高于90%。
용구병기규양완대자성개공규효개성，병통과희병기관능화리자액체적쌍건여구기지간적자유기가성반응장구유불동측련완기적리자액체부재도자성개공규효표면，제비료자성개공규효부재감성리자액체최화제。채용홍외광보분석、X사선연사、유궤원소분석、담기물리흡부/탈부분석화양품진동자강계대최화제적결구화자성능진행료표정，최후통과최화삼유산감유지여갑순지교환반응대기최화성능진행료평개。결과표명，수착리자액체측련완기탄개수적증다，자성개공규효부재리자액체최화제적리자액체부재량강저，비표면적화공체적강저。당리자액체측련완기위신기、십이완기혹십륙완기시，유산갑지산솔균고우95%，병차반응3차후유산갑지산솔의연고우90%。
Magnetic mesoporous silica was modified with 3-mercaptopropyl trimethoxysilane, and then ionic liquid with different alkyl chains was immobilized on magnetic mesoporous silicavia free radical addition reaction between sulfydryl group and double bond. The catalysts were characterized with FTIR, XRD, elemental analysis and vibrating sample magnetometer. Finally, the catalytic activity of the catalyst was evaluated through catalytic transesterification reaction of glycerol trioleate with methanol. Ionic liquid loading, specific surface area and pore volume of the catalyst decreased with the increase of alkyl chain of ionic liquid. When the alkyl chain of ionic liquid was octyl group, dodecyl group or hexadecyl group, the yield of methyl oleate was higher than 95%, and after three cycles, the yield of methyl oleate was still higher than 90%.