共查询到19条相似文献,搜索用时 218 毫秒
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以锆(Ⅳ)离子为印迹离子,磷酸三丁酯(TBP)为络合剂,4-乙烯基吡啶和苯乙烯为功能单体,二乙烯基苯为交联剂,采用本体聚合法制备了锆离子印迹聚合物(Zr-IIPs)和控制聚合物(CPs).用1∶1盐酸将锆离子印迹聚合物中的锆离子洗脱,释放出印迹空腔.对Zr-IIPs和CPs进行了FT-IR和XRD分析表征.研究了pH及... 相似文献
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In this article, the binding characteristics of the imprinted polymer P‐1[CoII(salen)] (salen: bis(2‐hydroxybenzaldehyde)ethylenediimine) to nitric oxide (NO) have been reported. P‐1[CoII(salen)] was characterized by Fourier transform infrared analysis, thermogravimetric analysis, and differential scanning calorimetry. Batch‐mode adsorption studies were carried out to investigate binding thermodynamics, kinetics, and selective recognition behavior of P‐1[CoII(salen)] to NO. The kinetics study indicates that binding of the polymer to NO fits the first‐order reaction kinetics with the rate constant k1 of 0.087 min?1. Langmuir and Freundlich equations were used to explain the equilibrium character of P‐1[CoII(salen)] binding to NO. The r2 and χ2 values suggest that total amount of NO bound by P‐1[CoII(salen)] can be best fitted by the Langmuir equation. The binding capacity (Bmax) of P‐1[CoII(salen)] was calculated to be 76.28 μmol/g, very close to the experimental value, 75 μmol/g. The thermodynamics and selectivity experiments showed that the affinity of P‐1[CoII(salen)] to NO was much higher than carbon dioxide (CO2) and oxygen (O2), suggesting that P‐1[CoII(salen)] is a promising functional material for NO storage and NO sensing. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013 相似文献
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以一种铀酰配合物为模板,制备了一种用于从水相选择性分离铀酰的新型印迹聚合物。用5-氯甲基水杨醛和3,4-二氨基苯甲酸合成四齿配体salophen,再合成铀酰与salophen的配合物铀酰-salophen。然后以甲基丙烯酸甲酯为功能单体,二甲基丙烯酸乙二醇酯为交联剂,铀酰-salophen为模板,合成铀酰的印迹聚合物。聚合物中的铀酰通过酸浸除去。用平衡吸附法研究了聚合物对铀酰的吸附性能和选择识别能力,且探讨了实验条件对印迹聚合物吸附性能的影响。结果表明,在竞争金属离子存在下,印迹聚合物对铀酰具有较高的吸附能力和选择识别能力,选择性系数大于200,且可以循环使用。 相似文献
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以Pb2+为模板,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EDMA)为交联剂,十二烷基苯磺酸钠(SDBS)为分散剂,采用乳液悬浮聚合法制备了铅离子印迹聚合物微球。通过静态平衡吸附实验和Scatchard分析法研究了聚合物微球的吸附性能和选择性。结果表明,铅离子印迹聚合微球能有效去除溶液中的铅离子,最大吸附容量为15.29 mg/g。在竞争离子Cd2+存在的溶液中,铅离子印迹聚合物微球呈现出对铅离子的高选择性。Pb2+/Cd2+的识别因子为19.01,结合位点的离解常数Kd=35.61 mg/L,最大表观结合量Qmax=25.19 mg/g。 相似文献
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Using nickel(II) acetate.-2,2'-dipyridyl complex as template and N-vinyl-2-pyrrolidone (NVP) as coordinate functional monomer,.a new kind of metal-compiexing template molecularly impnnted polymer (MIP) was prepared..The results of equilibri.um binding experiments in. aqueous solution showed that the MIP had higher'binding capacity for nickel( II )-2,2'-dipyridyl than the non-imprinted polymer with the same chemical composition. Theinfluences of metal ions and pHof solution on the recognition performance of MIP were investigated. The bindingcharacteristics of MIP were evaluated by the Scatchard analysis with one-site and two-site binding equations, respectively. The results on substrate selectivity of imprinted polymer revealed that MIP had better binding affinityfor template among thetested compounds. 相似文献
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利用冰冻凝胶(cryogel,简称冰胶)印迹聚合物实现了脂肪酶的固定化.在脂肪酶存在的条件下,以过硫酸铵/亚硫酸氢钠为引发剂,由丙烯酰胺、N,N-亚甲基双丙烯酰胺、丙烯酸、烯丙胺共聚而得到印迹聚合物固定化酶.通过催化三油酸甘油酯与甲醇的酯交换反应,发现冰胶固定化脂肪酶、常规凝胶固定化脂肪酶、游离脂肪酶具有相似的催化性能.冰胶固定化酶与相应的凝胶固定化酶显示出类似的稳定性,而传质方面则优于常规凝胶固定化酶,因此冰胶印迹聚合物固定化有望成为一种具有吸引力的酶固定化方法. 相似文献