摘要
通过红外、元素分析对2种不同类型的膦酸化合物改性氧化锆的改性条件和改性机理进行了研究,结果表明:十二烷基膦酸(DPA)通过Lewis酸碱作用改性,室温浸泡即可达到满意的吸附量;而具有螯合结构的十二胺-N,N-二亚甲基膦酸(DDPA)与氧化锆结合时存在较强的络合作用,最佳改性条件为酸性条件下加热回流。2种膦酸改性氧化锆固定相都具有较好的疏水性,但由于吸附方式的不同,DDPA-ZrO2具有较强的阳离子交换作用和阴离子屏蔽作用,能更有效地用于极性化合物的分离。
Two phosphonic acids: dodecylamine-N,N-dimethylenephosphonic acid(DDPA) and dodecylphosphonic acid(DPA),were used to modify zirconia stationary phase in this paper.The result of FTIR and element analysis indicated that DPA adsorbed on zirconia with Lewis acid-base interaction;however,DDPA adsorbed mainly with chelating effect.Apart from the hydrophobicity,DDPA-ZrO 2 had cation-exchange and anion-repellent interaction which was useful for the separation of polar compounds.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2008年第3期8-10,27,共4页
Journal of Wuhan University of Technology
