辐射聚合法制备噻吩类分子印迹聚合物及印迹共混膜

发布时间：2018-03-20 01:14

  本文选题：分子印迹聚合物　切入点：中空双模板　出处：《天津工业大学》2017年硕士论文　论文类型：学位论文

【摘要】：分子印迹聚合物(MIPs)作为一种功能高分子材料,以其独特的特异识别性和高效选择性被应用于各个领域。本文依据表面分子印迹的原理,以Si02为固相载体基质,并通过3-(甲基丙烯酰氧)丙基三甲氧基硅烷(MPS)对其表面进行乙烯基改性,以甲基丙烯酸(MAA)为功能单体,无需加入引发剂,而是采用辐射引发聚合的方法制备出苯并噻吩(BT)、二苯并噻吩(DBT)双模板分子印迹聚合物,最后用氢氟酸去除Si02内核得到具有中空结构的聚合物(H-MIP)。实验中考察了辐射剂量对聚合物微球形态的影响,并通过FT-IR、SEM、TEM、TGA对其结构进行了表征,测试印迹聚合物的吸附性能与选择性能。结果表明,H-MIP比MIPs表现出更高的吸附性能和更好的选择性能,对BT与DBT吸附容量分别为195μmol/g和203μmol/g。为石油行业中燃油脱硫提供了一个很好的方法。基于膜材料成本低、能耗少、效率高、识别性好、制备过程简单、后处理容易的特点,本文又以PSF为成膜材料,N,N二甲基甲酰胺为铸膜液,MIPs为填充物,采用溶液相转换法合成了印迹共混膜。实验过程中探究了成膜材料、凝固浴温度及膜浓度对膜结构的影响,并利用膜性能评价装置和扫描电子显微镜考察了成膜性能,研究了共混膜的选择吸附能力。结果表明,PSF的含量在25%,凝固浴温度在35℃时最适宜平板刮膜,并且对目标物有很高的吸附量,从而可实现对结构类似物的初步分离。
[Abstract]:As a functional polymer, molecularly imprinted polymer (MIP) has been applied in various fields for its unique specificity and high selectivity. According to the principle of surface molecular imprinting, Si02 is used as solid matrix. The surface of 3-( methacrylol) propyl trimethoxysilane (MPS) was modified by vinyl group, and MAA was used as functional monomer without adding initiator. Instead, two template molecularly imprinted polymers of benzothiophene (BTN) and dibenzothiophene (DBT) were prepared by radiation-initiated polymerization. In the end, the hollow structure of Si02 core was obtained by removing hydrofluoric acid. The effect of radiation dose on the morphology of polymer microspheres was investigated, and the structure of the polymer was characterized by FT-IRN SEMMA-TEMGA-TGA. The adsorption and selective properties of imprinted polymers were tested. The results showed that the adsorption and selectivity of H-MIP were higher than those of MIPs. The adsorption capacities of BT and DBT are 195 渭 mol/g and 203 渭 mol / g, respectively, which provide a good method for oil desulfurization in petroleum industry. Based on the characteristics of low cost of membrane material, low energy consumption, high efficiency, good recognition, simple preparation process and easy post-treatment, In this paper, the imprinted blend films were synthesized by using PSF as the film-forming material and dimethylformamide as the filling material. The effects of the film forming material, coagulation bath temperature and membrane concentration on the membrane structure were investigated. The film forming performance was investigated by means of membrane performance evaluation device and scanning electron microscope. The selective adsorption capacity of the blend membrane was studied. The results showed that the content of PSF was 25 and the solidification bath temperature was 35 鈩，

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