通过聚苯的磺化和碳化制备酸性树脂-碳复合材料

Preparation of Acidic Resin-Carbon Composite Material through the Sulfonation and Carbonization of Polyphenyl

用浓硫酸在170oC下处理聚苯,发生了磺化和碳化过程,生成了一种酸性树脂-碳复合材料.其比表面积为14m2/g,与磺酸基相关的强酸量为1.2mmol/g,氨吸附量热测定的起始吸附热较高,表明表面磺酸基没有形成焦硫酸根;部分磺酸基在400oC以上才开始分解,表现出很高的热稳定性.该强酸性复合材料在异戊烯与甲醇醚化生成甲基叔戊基醚的反应中显示出较高的催化活性,优于用葡萄糖碳化和磺化得到的强酸性碳材料.

Treatment of polyphenyl in concentrated H2SO4 at 170 oC resulted in its sulfonation and carbonization,leading to the formation of acidic resin-carbon composite material with the surface area of about 14 m2/g and strong acid sites of about 1.2 mmol/g related to-SO3H groups.The microcalorimetric adsorption of ammonia showed the high initial adsorption heat,indicating that the formation of pyrosulfuric groups from the sulfonic groups on the surface was unlikely.In addition,it was found that some of the sulfonic groups on such composite material were highly stable since they began to decompose only at a temperature higher than 400 oC.Such acidic composite material was also found to be highly active for the etherification of isopentene with methanol to produce tert-amyl methyl ether.In fact,it was more active for the etherification than the acidic carbon prepared from the sulfonation and carbonization of glucose.