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以硅胶为基体,聚烯丙基胺(PAA)为表面修饰剂,ECH为交联剂,制备了铜表面印迹材料IIP-PAA/SiO2。考察了印迹条件对印迹材料吸附性能的影响,结果为:n(Cu2+):n(N)为0.5,n(ECH):n(N)为0.6,印迹温度323K,时间3h,甲醇为反应介质。合成的IIP-PAA/SiO2材料对Cu(Ⅱ)的吸附性能明显优于PAA/SiO2和NIP材料。在相同条件下,印迹材料的铜吸附量达到0.631mmol·g-1,铜锌选择性系数为56.3,相对选择性系数为26.0。另外印迹材料具有再生吸附性能,经过5次吸附-解吸循环后,其吸附容量维持在90.2%以上。
Using silica gel as substrate, polyallylamine (PAA) as surface modifier and ECH as crosslinking agent, IIP-PAA / SiO2 was prepared on copper surface. The effects of imprinting conditions on the adsorption properties of the imprinted material were investigated. The results showed that the optimal conditions were as follows: n (Cu2 +): n (N) 0.5, n (NCH) 0.6, imprinting temperature 323K, . The adsorption properties of the synthesized IIP-PAA / SiO2 for Cu (Ⅱ) are obviously better than those of PAA / SiO2 and NIP. Under the same conditions, the copper adsorption capacity of the imprinted material reached 0.631 mmol · g-1, the Cu-Zn selectivity coefficient was 56.3, and the relative selectivity coefficient was 26.0. In addition, the imprinted material possesses regenerative adsorption ability, and after 5 adsorption-desorption cycles, its adsorption capacity is maintained above 90.2%.