月桂酸
催化作用
甲醇
化学
碳纳米管
甲酸钠
高分子化学
聚合
磺酸
单体
核化学
材料科学
有机化学
聚合物
脂肪酸
纳米技术
作者
Xiaohong Zhang,Qianqian Tang,Dong Yang,Weiming Hua,Yinghong Yue,Beidi Wang,Xiaohuan Zhang,Jianhua Hu
标识
DOI:10.1016/j.matchemphys.2010.11.021
摘要
▶ Poly( p -styenesulfonate acid)-grafted multi-walled carbon nanotubes (PSSA- g -MWCNTs) were successfully prepared by a facile in situ polymerization strategy. ▶ The PSSA- g -MWCNTs showed high catalytic activity in the esterification of lauric acid with methanol, and could be easily separated from the product by filtration. ▶ The catalytic activity of PSSA- g -MWCNTs showed no detectable change even after recycling after being used for three times. Poly( p -styenesulfonate acid)-grafted multi-walled carbon nanotubes (PSSA- g -MWCNTs) were prepared by in situ polymerization of sodium p -styrenesulfonate in the presence of MWCNTs, followed by refluxing with concentrated hydrochloric acid. In this reaction system, sodium p -styrenesulfonate served not only as the reaction monomer but also as an amphiphilic dispersant to disperse pristine MWCNTs in water, which is critical for the grafting PSSA onto MWCNTs. Due to the existence of copious sulfonic groups (–SO 3 H), PSSA- g -MWCNTs could be stably dispersed in polar solvents, such as water and methanol. This is favorable to the application of PSSA- g -MWCNTs as a solid-acid catalyst in a heterogeneous catalytic reaction. The PSSA- g -MWCNTs showed high catalytic activity in the esterification of lauric acid with methanol, and could be easily separated from the product by filtration. The catalytic activity of PSSA- g -MWCNTs showed no detectable change even after recycling after being used for three times.
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