沉淀聚合法制备磺胺二甲嘧啶分子印迹聚合物

以磺胺二甲嘧啶为模板分子,采用沉淀聚合法制备了分子印迹聚合物,并对其选择性和吸附性能进行了研究.等温静态平衡实验结果表明,该印迹聚合物与相应的空白聚合物相比具有高的选择性和亲和性;Scatchard模型分析结果表明,该印迹聚合物对印迹分子存在一种均匀的结合位点,最大表观结合量为31.866 mg/g.     

沉淀聚合法制备烟酰胺分子印迹聚合物微球

以烟酰胺为模板分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,乙腈为溶剂,采用沉淀聚合法制备了烟酰胺分子印迹聚合物,通过静态平衡吸附和色谱分析对印迹聚合物进行表征,结果表明,印迹聚合物对烟酰胺分子具有很好的吸附能力和特异识别性。     

沉淀聚合法合成尿素分子印迹聚合物及其表征

分子印迹聚合物由于具有与天然抗体相似的识别性能和与高分子同样的抗腐蚀性能的双重优点,因而被广泛应用于生物工程、临床医学、环境监测、食品工业等众多领域的研究中[16].合成了尿素分子印迹聚合物(尿素MIP),研究了尿素分子印迹聚合物对尿素的吸附能力,探讨了不同介质对吸附的影响.尿素分子印迹聚合物在乙腈中对尿素分子的识别能...     

沉淀聚合法制备咖啡因分子印迹聚合物微球

以咖啡因为印迹分子,甲基丙烯酸为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,采用沉淀聚合法在乙腈溶液中制备了针对咖啡因的分子印迹聚合物微球。对沉淀聚合中单体、引发剂、溶剂用量的比例关系进行探索,并利用平衡结合实验研究了聚合物对印迹分子的吸附性能,结果表明该印迹聚合物微球呈现出较好的结合能力。     

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。     

邻苯二甲酸二丁酯分子印迹聚合物的制备及性能研究

以邻苯二甲酸二丁酯(DBP)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(EGD-MA)为交联剂,采用沉淀聚合法制备了分子印迹聚合物。通过静态平衡结合法和Scatchard分析法,研究了分子印迹聚合物的识别性能和结合能力。结果表明,该分子印迹聚合物对模板分子DBP具有较强的吸附特性和很好的选择性,其识别因子可达4.19。Scatchard分析表明,印迹聚合物微球存在2类不同的结合位点。高结合位点的平衡离解常数Kd1=0.078 mg/L,最大表观结合量Qmax1=53.03 mg/g;低结合位点的离解常数Kd2=0.023 mg/L,最大表观结合量Qmax2=33.95 mg/g。     

乙酰水杨酸分子印迹聚合物微球的制备及性能研究

以乙酰水杨酸为模板分子,采用沉淀聚合的方式制备了对乙酰水杨酸具有高选择性和亲和性的分子印迹聚合物微球。通过紫外光谱分析法考察了模板分子与功能单体作用规律,优选了功能单体与配合比例。等温吸附实验的结果显示,与相应的空白聚合物相比,印迹聚合物对模板分子具有更高的亲和性;Scatchard数学模型分析的结果表明,印迹聚合物中主要存在一类亲和性质相同的结合位点,其最大表观结合量为37.97 mg/g。选择性吸附实验表明,制备的印迹聚合物对模板分子具有良好的选择性识别能力。     

苏丹红分子印迹聚合物的合成及吸附性能研究

以苏丹红为模板分子,丙烯酰胺为功能单体,乙二醇二甲基丙烯酸酯为交联剂,偶氮二异丁腈为引发剂,在乙腈中采用沉淀聚合法制备分子印迹聚合物。研究了模板分子与功能单体的相互作用和最佳比例,探讨了超声波/离心提取工艺对分子印迹聚合物洗脱的影响,对合成的分子印迹聚合物进行静态吸附实验、吸附动力学实验以及Scatchard分析。结果表明,在相同条件下,与非印迹聚合物相比,分子印迹聚合物对苏丹红有良好的吸附性能。     

醚菌酯分子印迹聚合物的制备及表征

[方法]以醚菌酯为模板分子、甲基丙烯酸(MAA)为功能单体、乙二醇二甲基丙烯酸酯(EDMA)为交联剂、偶氮二异丁腈(AIBN)为引发剂,用沉淀聚合法制备了醚菌酯分子印迹聚合物。[结果]红外光谱分析表明模板分子已洗脱完全。平衡吸附实验及Scatchard分析可知MIPs最大表观结合量为97.11 mg/g。用固相萃取实验富集分离土壤中的醚菌酯,与Florisil柱相比,分子印迹固相萃取柱净化更彻底,减少了杂质对分析的干扰。[结论]沉淀聚合法制备的MIP吸附性较好,具有一定的应用价值。     

硅球表面制备荧光分子印迹聚合物检测高效氟氯氰菊酯的研究

采用沉淀聚合法制备了以高效氟氯氰菊酯(Beta-cyhalothrin,BC)为模板分子的荧光分子印迹聚合物。以甲基丙烯酸甲酯为功能单体,三羟甲基丙烷三甲基丙烯酸酯作为交联剂。通过红外光谱、紫外光谱、扫描电镜、透射电镜、热重分析证明已成功地合成荧光分子印迹聚合物微球,并且具有良好的球形形貌(微球粒径约为200 nm,印迹层厚度约为20nm)、良好的单分散性和卓越的热稳定性。通过荧光检测实验可知,荧光强度与BC的浓度呈线性关系并建立了线性回归方程:I0/I-1=0.004 1c-0.018 6,R2=0.983 7,检出限为13.251 nmol/L。通过选择性实验说明,荧光分子印迹聚合物对BC具有较好的特异性识别性能。     

二氯喹啉酸分子印迹聚合物微球的制备

采用改进的分散聚合方法制得的纳米级聚苯乙烯微球(PS)为种球,以二氯喹啉酸(quinclorac)为模板分子,通过单步溶胀聚合法在水相中制备了单分散分子印迹聚合物微球(MIPs)。通过红外光谱分析MIPs的结合位点;利用紫外光谱研究了MIPs的结合机理和识别特性;用扫描电镜观察了微球的形貌。结果表明,PS微球的粒径分布100～150nm,MIPs的粒径分布为200～300nm;Scatchard分析表明,MIPs在识别二氯喹啉酸过程中存在两类结合位点:高亲和性位点的解离常数KD1=0.0488mmol/L;低亲和性位点的解离常数KD2=0.423mmol/L。     

烯酰吗啉分子印迹聚合物的合成及固相萃取研究

以烯酰吗啉为名义模板,甲基丙烯酸(MAA)为功能单体,二甲基丙烯酸乙二醇酯(EDMA)为交联剂,在制孔剂三氯甲烷中制备了烯酰吗啉的分子印迹聚合物。优化的模板、MAA及EDMA间的配比为1∶4∶20。采用本体聚合和悬浮聚合两种聚合方法进行MIP的制备,探讨两种聚合方法的不同及优缺点。研究还以分子印迹聚合物作为固相萃取的填料,制备固相萃取柱,对其应用性能进行评价。     

分子印迹聚合物材料在手性药物分离和药物检测中的应用

分子印迹聚合物材料是近几年来发展起来的一种新型吸附与分离材料,具有预定选择性、专一识别性、高度稳定性等优点。本文对分子印迹聚合物材料的制备、在手性药物分离和药物检测中的应用进行了讨论和评述,并对该领域今后的发展趋势进行了展望。     

分子印迹聚合物在分离技术中的研究进展

由于分子印迹聚合物 (MIP)所具有的独特的预定选择性 ,它在分离技术中的应用研究已受到了普遍关注 ,本文将从MIP的基本概念、制备方法及其在分离技术中的应用等方面对MIP在分离技术中的研究进行简单的评述。引用文献 40篇     

可逆加成-断裂链转移沉淀聚合法制备噻菌灵分子印迹聚合物

采用可逆加成-断裂链转移（RAFT）聚合技术与沉淀聚合技术相结合的方法合成了噻菌灵分子印迹聚合物。该聚合物微粒具有更好的分散性,其印迹效果比传统沉淀聚合法得到的分子印迹聚合物更好。为从复杂的农药残留中富集和分离噻菌灵提供了可能。     

Deep-Eutectic-Solvent-Based Mesoporous Molecularly Imprinted Polymers for Purification of Gallic Acid from Camellia spp. Fruit Shells

To produce antioxidant substances from agricultural waste Camellia spp. fruit shells before their further utilization, gallic acid from five kinds of Camellia spp. fruit shells was separated on specific recognition by deep eutectic solvent molecularly imprinted polymers (DES@MIPs), which were prepared by bulk polymerization using gallic acid as the template and deep eutectic solvents (α-methylacrylic acid and choline chloride) as functional monomers. The optimized DES@MIPs were characterized by scanning electron microscopy, particle size analysis, nitrogen sorption porosimetry, elemental analysis, Fourier transform infrared spectroscopy, and thermal gravimetric analysis. The adsorptive behavior of gallic acid on DES@MIPs was also investigated. The results indicated that DES@MIPs were successfully prepared as mesoporous materials with average pore diameter of 9.65 nm and total pore volume of 0.315 cm³ g⁻¹, and the adsorption behavior was multilayer adsorption and pseudo-second-order kinetics with the saturation adsorptive capacity of gallic acid reaching 0.7110 mmol g⁻¹. Although the content of gallic acid in five fruit shells was quite different, the purification recovery of gallic acid was high, ranging from 87.85–96.75% with a purity over 80%. Thus, the purification of gallic acid from Camellia spp. fruit shells could be realized feasibly using DES@MIPs with favorable economic and environmental benefits.     

Molecularly Imprinted Polymers Based on Chitosan for 2,4-Dichlorophenoxyacetic Acid Removal

The development of low-cost and eco-friendly materials for the removal of pollutants from water is one of the main modern challenges. For this purpose, molecularly imprinted polymers were prepared under optimized conditions starting from chitosan (CS), chemically or ionically modified with glycidyl methacrylate (GMA) or itaconic acid (ITA), respectively. 2,4-Dichlorophenoxyacetic acid (2,4-D) was used as a template, obtaining the CS_GMA and CS_ITA series. The influence of the template concentration on the MIPs’ (molecularly imprinted polymers) morphology, thermal behaviour and swelling ability, as well as on the 2,4-D removal capacity, were analyzed. The amount of the template used for the imprinting, together with the different permeability of the matrices, were the key factors driving the analyte uptake process. Despite the good performance shown by the non-imprinted CS_GMA sample, the best results were obtained when CS_GMA was imprinted with the highest amount (5%) of template (CS_GMA_5). This system was also more efficient when consecutive adsorption experiments were carried out. In addition, CS_GMA_5 had a desorption efficiency of 90–100% when a low pesticide concentration was used. These findings suggest that the presence of imprinted cavities could be useful in improving the performance of sorbent materials making CS_GMA_5 a possible candidate for 2,4-D removal.     

Sorption of Phthalates on Molecularly Imprinted Polymers

Porous beads of styrene divinylbenzene copolymer, S-co-DVB, imprinted with dimethyl phthalate, DMP, were obtained. Two solvents were applied for the formation of pores: n-hexane and n-octane. The sorbents were prepared by membrane emulsification of monomer mixtures containing DMP followed by suspension polymerization. The average diameters of the synthesized beads were 40 µm for beads obtained from mixtures with n-octane, and 30 µm for preparations with n-hexane as solvent. It was shown that almost all monodispersive sorbents were obtained; their SPAN parameter was as small as 0.7–0.9. Sorption properties of evaluated samples varied in relation to the kind of applied reaction mixture. Generally, imprinted materials showed higher sorption capacity towards DMP than their off-template analogues. For the sorbent obtained in the presence of n-octane and with 3 wt.% of DMP, sorption of dimethyl phthalate took the highest value - 89 mg/g. The sorbents imprinted with DMP were checked for sorption of diethyl phthalate, DEP, and dibuthyl phthalate, DBP also. It was shown that sorbability of synthesized materials towards other phthalates was much smaller than for DMP and was not related to the presence of dimethyl phthalate foot prints.     

Nanopore Molecularly Imprinted Polymer Membranes for Environmental Usage: Selective Separation of 2,4-Dichlorophenoxyacetic Acid as a Toxic Herbicide from Water

Nanopore molecularly imprinted polymers and membranes for selective separation of 2,4-dichlorophennoxyacetic acid were prepared using 2,4-dichlorophennoxyacetic acid as a template molecule, methacrylic acid as a functional monomer and trimethylolpropane trimethacrylate as a cross linker. Recognition properties of molecularly imprinted membranes were evaluated by performing binding experiments with analog phenoxyacetic acid. Flux, permeability, and permselectivity of the membranes as well as their properties were studied. Molecularly imprinted membrane-2 showed the equilibrium binding capacity of 34.57 mg/g and a selectivity factor of 12.96 toward 2,4-dichlorophennoxyacetic acid at 500 mg/l concentration. Permeability experiments indicated that molecularly imprinted membrane can recognize and absorb 2,4-dichlorophennoxyacetic acid from aqueous solutions’ selectively.