克伦特罗分子印迹聚合物吸附性能研究

选用分子印迹技术,以克伦特罗为印迹分子,α-甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,合成克伦特罗分子印迹聚合物,研究其吸附性能。结果表明,与组成相同的非印迹聚合物相比,克伦特罗印迹聚合物有较大的吸附性能,有望在克伦特罗分离分析中作为固相萃取的材料。     

马尿酸分子印迹聚合物的合成及性能研究

以马尿酸为模板分子,2-乙烯基吡啶为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,在甲醇溶液中制备了马尿酸分子印迹聚合物。该聚合物对模板分子具有良好的亲和性和选择性,用作液谱固定相可将其与结构类似物酪氨酸快速基线分离,并对功能单体种类进行了选择。     

沉淀聚合法制备Boc-L-苯丙氨酸印迹聚合物

以Boc-L-苯丙氨酸为模板分子,应用沉淀聚合法制备了对Boc-L-苯丙氨酸具有特异性吸附的分子印迹聚合物。通过平衡吸附和高效液相色谱的方法对印迹聚合物进行评价,结果表明印迹聚合物具有高吸附效率和选择性,实现了消旋混和物的快速基线分离。     

药物柳胺酚分子印迹聚合物的制备及识别性能研究

采用分子印迹技术合成了对药物柳胺酚有高选择性的印迹聚合物,通过平衡吸附及高效液相色谱的方法对聚合物进行了评价。结果表明,制备的印迹聚合物对模板分子有很强的吸附能力和良好的选择性,可以很好的分离模板分子及其结构类似物。     

糠醛分子印迹聚合物的制备及吸附性能研究

以糠醛为模板分子,采用本体聚合法制备了对糠醛具有高特异吸附性的糠醛分子印迹聚合物。利用扫描电镜和红外光谱对聚合物进行表征分析,并利用动态吸附、静态吸附和选择性吸附实验考察糠醛印迹聚合物的吸附性能。结果表明,所制备的糠醛分子印迹聚合物对糠醛呈现出较好的特异性吸附能力,有望作为固相萃取材料应用于食品中糠醛残留的分离、富集和检测。     

糠醛分子印迹聚合物的制备及吸附性能研究

以糠醛为模板分子,采用本体聚合法制备了对糠醛具有高特异吸附性的糠醛分子印迹聚合物。利用扫描电镜和红外光谱对聚合物进行表征分析,并利用动态吸附、静态吸附和选择性吸附实验考察糠醛印迹聚合物的吸附性能。结果表明,所制备的糠醛分子印迹聚合物对糠醛呈现出较好的特异性吸附能力,有望作为固相萃取材料应用于食品中糠醛残留的分离、富集和检测。     

香草醛分子印迹聚合物的制备及其性能研究

以香草醛为模板分子,二甲基丙烯酸乙二醇酯(EDMA)为交联剂,甲基丙烯酸(MAA)为功能单体,采用悬浮聚合法和本体聚合法制备了香草醛分子印迹聚合物。利用扫描电镜、平衡吸附实验、选择性吸附实验等,探讨了两种聚合方法制备出的分子印迹聚合物的性能。结果表明,悬浮聚合法制备的分子印迹聚合物粒径分布更均匀,选择吸附性能更好,更适用于分离材料。     

原花青素分子印迹聚合物的制备及其吸附性能研究

目的制备原花青素分子印迹聚合物,研究其吸附性能。方法以原花青素为目标分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯(EGDMA)为交联剂,偶氮二异丁腈(AIBN)为引发剂合成分子印迹聚合物。研究结果表明吸附溶剂选择水溶液为最佳溶剂,吸附时间在120min时可达吸附平衡,分子印迹聚合物对原花青素分子的吸附性能和非分子印迹聚合物相比增加显著,且具有很高的选择性。结论分子印迹聚合物能选择性地吸附原花青素,结果满意。     

磁性甲磺隆分子印迹聚合物的制备及性能研究

以四氧化三铁为内核,在其表面包覆二氧化硅,采用表面印迹技术制备了磁性甲磺隆分子印迹聚合物(MIPs)。采用磁强计(VSM)对产物的磁性进行了表征。研究了溶液pH对印迹聚合物吸附容量的影响。通过动态平衡结合法研究了分子印迹聚合物的吸附能力。结果表明,准二级动力学模型很好地拟合了吸附动力学,相关系数r达到0.999 6,吉布斯自由能变化值为-8.481 kJ/mol。与非分子印迹聚合物相比,制备的MIPs表现出高吸附容量和快速的吸附动力学。特异性吸附实验表明分子印迹聚合物对甲磺隆具有高选择性吸附。     

基于壳聚糖的分子印迹聚合物的制备和应用

壳聚糖具有良好的生物相容性和独特的分子结构,基于其制备的分子印迹聚合物因亲和性和选择性高、应用范围广等特点引起了广泛的关注。本文首先总结了壳聚糖和改性壳聚糖在分子印迹聚合物制备中的作用,然后介绍了壳聚糖分子印迹聚合物在环境污染治理、医药、蛋白质分离与识别、手性物质分离以及吸附功能成分等方面的应用,分析了壳聚糖分子印迹聚合物在各个应用领域的优缺点及发展方向。最后,从发展绿色分子印迹技术以及分子印迹技术与电化学传感器结合等层面对壳聚糖分子印迹聚合物的应用前景进行了展望。     

Preparation and evaluation of a molecularly imprinted polymer for tolazoline

A uniformly sized molecularly imprinted polymer for the peripheral vasodilator drug tolazoline (T‐MIP) was prepared, and a nonimprinted polymer (NIP) was also synthesized in the same way but in the absence of the template. The T‐MIP was prepared with methylacrylic acid as functional monomer and ethylene glycol dimethacrylate as crosslinker by a multistep swelling and polymerization method. These imprinted materials were characterized by scanning electron microscopy, nitrogen adsorption, and static adsorption experiments. Binding studies were also performed to evaluate the uptake of T‐MIP and NIP with the results that T‐MIP had a significantly higher binding capacity for tolazoline (T) than did NIP. The maximum static adsorption capacities of T‐MIP and NIP for T were 78.9 and 38.8 μmol/g, respectively. The T‐MIPs and NIPs were used as stationary phases of solid‐phase extraction (SPE), and a relative selectivity coefficient (k′) value of 5.21 was obtained, which showed that the T‐MIP sorbent had higher selectivity than the NIP sorbent. The method was applied to the determination of T in urine samples. The prepared polymer sorbent showed promise for SPE for gas chromatography determination of T in urine samples. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2010     

Side chain functionality dominated the chromatography of N‐protected amino acid on molecularly imprinted polymer

Molecularly imprinted polymer (MIP) with N^α‐protected amino acid as the print molecule was prepared and used as the stationary phase for the chromatographic study of molecular recognition. Particles of MIP were prepared by photopolymerization of 4‐vinylpyridine in the presence of tert‐butyloxycarbonyl‐L ‐tyrosine (Boc‐L ‐Tyr) and packed into a column for the chromatographic resolution of Boc‐L ‐Tyr and tert‐butyloxycarbonyl‐L ‐phenylalanine (Boc‐L ‐Phe). These two N^α‐protected amino acids that differ from each other in the side chain with one hydroxyl group on the benzene ring could be well separated on the MIP. A separation factor of about two was achieved by using a mixture of acetonitrile (99.5 v/v %) and acetic acid (0.5 v/v %) as the mobile phase. Results suggest that the interaction between hydroxyl group in the side chain of amino acid and pyridine in the polymer dominated the selective adsorption of print molecule on the MIP. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2007     

舒必利分子印迹聚合物的制备及其吸附性能

以舒必利(SUL)为模板分子,甲基丙烯酸(MAA)为功能单体,乙二醇二甲基丙烯酸酯为交联剂,采用本体聚合法合成了舒必利的分子印迹聚合物(MIP),采用静态平衡和等温吸附实验研究了影响MIP性能的各种因素及吸附机理. 结果表明,当SUL为0.3 mmol时,制备其MIP的优化条件为：乙腈溶剂用量6 mL, SUL与MAA的摩尔比为1:4,以甲醇-乙酸(9:1, j)溶液为洗脱剂洗脱;该聚合物结构均匀、疏松,对SUL具有较好吸附性能,最大吸附容量为79.12 mmol/g,印迹因子为3.76;初步认为其吸附机理是SUL分子结构中的N-甲基吡咯烷、酰胺和苯磺酰胺基团上的氨基与MAA自组装形成的吸附识别位点空穴;该MIP能识别SUL及其结构类似物阿米舒必利和泰必利,特异性吸附率分别为68.35%, 66.72%和58.8%.     

以混旋的头孢拉定为模板的分子印迹聚合物的制备及拆分性能研究

以混旋的头孢拉定为模板分子与合成的（S）-（1-苯乙基）-甲基丙烯酰胺作为功能单体制备分子印迹聚合物,并用高效液相色谱法对印迹聚合物的选择性进行了考察。实现了对混旋的头孢拉定的拆分。同样的方法分别制备了3种混旋的氨基酸衍生物的分子印迹聚合物,未能实现对其混旋物质的分离。对比得出结论：对混旋物质的直接印迹需要模板分子应具有4个以上的作用位点。     

Preparation,characterization and adsorption performance of molecularly imprinted microspheres for erythromycin using suspension polymerization

BACKGROUND: There are few reports on erythromycin molecularly imprinted polymers (MIPs) used as HPLC stationary phase and solid phase extraction matrices. These imprinted polymers are prepared by bulk polymerization, which is tedious and time‐consuming, and they are irregular and possess poor reproducibility and low binding capacity. In this study, molecularly imprinted microspheres for erythromycin were prepared by aqueous suspension polymerization for the first time. RESULTS: Imprinted microspheres for erythromycin were prepared using suspension polymerization in which 1.5% PVA‐water solution is used as continuous phase, and chloroform solution containing erythromycin, methacrylic acid and crosslinker is used as disperse phase. The composition of disperse phase is optimized, and the optimum molar ratio of erythromycin to methacrylic acid was 1:5. Selectivity analysis revealed that the imprinted microspheres can specifically recognize erythromycin from its structure analogues. The binding mechanism between erythromycin and methacrylic acid was investigated by UV‐Vis spectrophotometry. Adsorption kinetics and the adsorption isotherm of the imprinted microspheres indicate that erythromycin can be adsorbed rapidly by the imprinted microspheres and the maximum theoretical static binding capacity is 128.6110 mg g^?1. The imprinted microspheres were used to extract erythromycin from a milk sample and a high recovery rate was obtained. CONCLUSION: Molecularly imprinted microspheres for erythromycin were uniform and possess high adsorption capacity and excellent selectivity. They are therefore a promising extraction and chromatographic media. Copyright © 2011 Society of Chemical Industry     

The use of metal‐containing monomer in the preparation of molecularly imprinted polymer to increase the adsorption capacity

Molecular imprinting is an elegant approach to induce antibody like recognition ability in synthetic polymers. The technique of molecular imprinting has been used extensively in the preparation of tailor‐made stationary phases in chromatography, sorbents in solid phase extraction, sensor elements, etc. Though several of the reported molecularly imprinted polymers (MIPs) possess substrate selectivity comparable to antibodies, they are poor in adsorption capacity. The adsorption capacity could be improved presumably through enhanced interaction between the functionalities of the monomers and the print molecule. A simple approach to improve the interaction is perhaps the use of chemically modified monomers in the synthesis of the MIPs. This article explores this possibility by using a metal‐containing monomer in the synthesis of MIP. The data obtained using a copper acrylate based MIP and cholesterol as substrate indicates the adsorption capacity can be improved considerably through the simple chemical modification of the functional monomer. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2795–2799, 2001     

Computer simulation and preparation of molecularly imprinted polymer membranes with chlorogenic acid as template

A computational approach was developed for screening functional monomers for rational design of molecularly imprinted polymer (MIP) membranes. It was based on a comparison of the binding energy of complexes between a template and various functional monomers. According to the results of theoretical calculations, MIP membranes with chlorogenic acid as a template were prepared with a UV irradiation polymerization method, using 4‐vinylpyridine as a functional monomer and N,N′‐methylenebisacrylamide as a crosslinker, with poly(vinylidene fluoride) microfiltration membranes as the support. Membranes covered with a thin layer of imprinted polymer selective to chlorogenic acid were then obtained and tested using the equilibrium‐adsorption method. The high affinity of these synthetic membranes to chlorogenic acid, together with their straightforward and inexpensive preparation, provides a good basis for the development of applications of imprinted polymers in separation processes such as solid‐phase extraction. Copyright © 2011 Society of Chemical Industry     

溶胶-凝胶法制备鞣花酸表面分子印迹聚合物

采用溶胶-凝胶方法和表面分子印迹技术，以二氧化硅为载体，鞣花酸为模板分子，3-氨丙基三乙氧基硅烷为功能单体，四乙氧基硅烷为交联剂，在室温下合成鞣花酸分子印迹聚合物(MIPs)。通过扫描电镜表征了MIP的表面形貌。通过静态吸附实验评价了MIP对鞣花酸的吸附行为。结果显示，MIP对鞣花酸可在40 min内达到吸附平衡，印迹因子为2.68，饱和吸附容量可达70 mg/g；与非印迹聚合物相比，MIP对鞣花酸具有高选择性和特异识别性。对吸附数据进行非线性拟合结果显示，MIP对鞣花酸的吸附动力学较好地符合准二级动力学模型，MIP对鞣花酸的吸附等温线较好地符合Langmuir等温方程。另外，该材料在经过5次循环利用之后，对鞣花酸的吸附容量仍能保持在90%以上，表现了较好的重复利用性能。所合成的MIP能够作为一种良好的选择性吸附鞣花酸的功能材料，有望应用于复杂基质中鞣花酸的分离和纯化。     

分子印迹聚合物在高效液相色谱柱中的应用

综述了分子印迹聚合物的制备原理、制备方法,介绍了分子印迹聚合物作为高效液相色谱固定相在分子印迹整体色谱柱、分子印迹填充色谱柱中的应用现状及存在的问题。