接枝改性玉米芯的制备及性能研究

Preparation and discussion of grafting moeified corncob

以丙烯酰胺(AAm)、甲基丙烯酸(MAA)为混合单体,硫酸亚铁铵(FeAmSO4)-过氧化氢(H2O2)氧化还原体系为引发剂,对玉米芯进行接枝共聚改性。对接枝改性后的玉米芯进行表征,并考察对Cr3+吸附性能。结果表明:单体AAm与MAA成功接枝到玉米芯大分子上,接枝改性后玉米芯具有良好的热稳定性能,离子吸附能力得到明显改善。

Modified corncobs were prepared by graft copolymerization with acrylamide （AAm）/methacrylic acid （MAA） using ferrous ammonium sulphate/H2O2 as a redox initiator. The results showed that AAm and MAA were successfully grafted onto corncobs backbone, comparing with ungrafted corncobs, grafted corncobs＇ thermal stability was improved. The copolymer had a better adsorption property.