Chloromethyl-zirconium oligo-polystyrenyl-phosphonatephosphate was used as the support of salen Mn(Ⅲ) which was synthesized by statistical method.The chloromethyl group of the support reacted with the free hydroxy of...Chloromethyl-zirconium oligo-polystyrenyl-phosphonatephosphate was used as the support of salen Mn(Ⅲ) which was synthesized by statistical method.The chloromethyl group of the support reacted with the free hydroxy of salen,and then with Mn(OAc)2·4H2O,so a new type of salen Mn(Ⅲ) catalyst supported on zirconium oligo-polystyrenyl-phosphonate-phosphate was synthesized.The catalyst was characterized by IR,SEM,element analysis and BET surface area.展开更多
以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),将丙烯酰胺接枝到CMCPS树脂表面,制得了新型聚丙烯酰胺树脂(PAM-CMCPS),并且用元素分...以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),将丙烯酰胺接枝到CMCPS树脂表面,制得了新型聚丙烯酰胺树脂(PAM-CMCPS),并且用元素分析、扫描电镜和红外光谱对其进行了表征。考察了此树脂对2,4-二氯苯氧乙酸的吸附性能、动力学和热力学参数。结果表明,此树脂对2,4-二氯苯氧乙酸的吸附量随溶液初始浓度和温度的升高而增加,当初始浓度为8 mmol/L时吸附效果最佳,树脂的静态饱和吸附容量为111.0 mg/g,Langmuir和Freundlich方程都呈现良好的拟合度。热力学平衡方程计算得ΔG<0,ΔH=268.2 k J/mol,ΔS>0,表明此吸附过程是一个自发、吸热、熵增加的过程。动力学研究表明,准二级动力学方程能较好拟合动力学实验结果,该过程符合准二级动力学模型。此PAM-CMCPS树脂应用于柑橘样品中2,4-二氯苯氧乙酸的吸附,取得了较满意的结果。展开更多
文摘Chloromethyl-zirconium oligo-polystyrenyl-phosphonatephosphate was used as the support of salen Mn(Ⅲ) which was synthesized by statistical method.The chloromethyl group of the support reacted with the free hydroxy of salen,and then with Mn(OAc)2·4H2O,so a new type of salen Mn(Ⅲ) catalyst supported on zirconium oligo-polystyrenyl-phosphonate-phosphate was synthesized.The catalyst was characterized by IR,SEM,element analysis and BET surface area.
文摘以氯甲基化交联聚苯乙烯树脂(CMCPS)为载体和大分子引发剂,溴化亚铜/2,2'-联吡啶为催化剂体系,采用了表面引发原子转移自由基聚合技术(SI-ATRP),将丙烯酰胺接枝到CMCPS树脂表面,制得了新型聚丙烯酰胺树脂(PAM-CMCPS),并且用元素分析、扫描电镜和红外光谱对其进行了表征。考察了此树脂对2,4-二氯苯氧乙酸的吸附性能、动力学和热力学参数。结果表明,此树脂对2,4-二氯苯氧乙酸的吸附量随溶液初始浓度和温度的升高而增加,当初始浓度为8 mmol/L时吸附效果最佳,树脂的静态饱和吸附容量为111.0 mg/g,Langmuir和Freundlich方程都呈现良好的拟合度。热力学平衡方程计算得ΔG<0,ΔH=268.2 k J/mol,ΔS>0,表明此吸附过程是一个自发、吸热、熵增加的过程。动力学研究表明,准二级动力学方程能较好拟合动力学实验结果,该过程符合准二级动力学模型。此PAM-CMCPS树脂应用于柑橘样品中2,4-二氯苯氧乙酸的吸附,取得了较满意的结果。
