磁性纳米球的制备、性能及应用研究
发布时间：2019-05-12 13:13
【摘要】：磁性纳米材料兼具磁性材料和纳米材料的双重特性,基于其易功能化的表面,在数据存储、生物医药及环境治理等很多领域具有非常广阔的应用前景。本文以磁性纳米球为模板,将不同结构的缓蚀剂分子装载于磁性纳米球,制备具有缓释能力的磁性纳米材料,进而将其分散于有机涂层中,使之在环境刺激下释放出缓蚀剂,实现对金属的防腐和自修复,并利用磁性纳米球在聚合物涂层中的纳米结构制备一类疏水、粗糙性表面而展现涂层的抗污能力。本文采用溶剂热法制备了尺寸约为100 nm、结构疏松的Co Fe2O4磁性纳米球。将苯并三唑(BTA)以共价结合的方式装载至其表面,得到Co Fe2O4/BTA纳米球。利用聚乙烯亚胺(PEI)对Co Fe2O4纳米球进行表面改性,进而与聚天冬氨酸钠(PASP)静电结合,得到Co Fe2O4/PEI/PASP纳米球。同样采用静电结合法将聚丙烯酸钠(PAAS)和咪唑啉季铵盐(IQAS)依次装载至Co Fe2O4/PEI表面,得到Co Fe2O4/PEI/PAAS/IQAS纳米球,这四种纳米球在室温下均具有超顺磁性,饱和磁化强度依次为70.0 emu/g、65.0 emu/g、59.5 emu/g和45.4 emu/g。将Co Fe2O4/BTA、Co Fe2O4/PEI/PASP和Co Fe2O4/PEI/PAAS/IQAS纳米球分别掺杂在SBS中成膜,得到了表面平整、致密的有机涂层。测试结果表明,掺杂了磁性纳米球的涂层可以有效抑制铜片的阳极极化,增大样品阻抗,降低腐蚀电流,从而抑制铜片的腐蚀。Co Fe2O4/PEI/PAAS/IQAS由于负载了两层缓蚀剂,具有双重防护作用,因而防腐性能最优。将Co Fe2O4/PEI/PAAS/IQAS磁性纳米球掺杂于SBS涂层中,划痕后进行测试,结果表明,磁性纳米球表面装载的缓蚀剂只在腐蚀环境刺激下,打破与磁性纳米球之间的静电力而释放,从而抑制金属的进一步腐蚀,具有明显的自修复功能。通过对玻片表面进行piranha溶液和硅烷化处理,将SEBS基层和结构层紧密涂覆在玻片表面,然后将掺杂了Co Fe2O4/PEI/PAAS/IQAS磁性纳米球的PS-PDMS-PVMS涂层涂覆于其上,得到一种疏水性、纳米级粗糙的表面。测试结果表明,该防污涂层比较粗糙,且为疏水性表面,水接触角为114.5°,SEBS涂层样品在浸泡于BSA-FITC蛋白质溶液过程中会不断吸附蛋白质,而掺杂了磁性纳米球的PS-PDMS-PVMS涂层几乎不吸附蛋白质,具有明显的防污能力。
[Abstract]:Magnetic nanomaterials have the dual characteristics of both magnetic materials and nanomaterials. Based on their functionalized surface, magnetic nanomaterials have a very broad application prospect in many fields, such as data storage, biomedicine and environmental treatment. In this paper, magnetic nanorods with different structures were loaded into magnetic nanosphers with different structures as templates, and magnetic nanomaterials with sustained release ability were prepared, and then dispersed in organic coatings to release corrosion inhibitors under environmental stimulation. The anticorrosion and self-repair of metal are realized, and a kind of hydrophobic and rough surface is prepared by using the nanostructure of magnetic nanosphere in polymer coating to show the antifouling ability of the coating. In this paper, Co Fe2O4 magnetic nanospheres with loose structure of about 100 nm, were prepared by solvothermal method. Benzotriazole (BTA) was loaded on its surface by covalent binding, and Co Fe2O4/BTA nanospheres were obtained. The surface of Co Fe2O4 nanoparticles was modified by polyethylene imine (PEI), and then the Co Fe2O4/PEI/PASP nanoparticles were obtained by electrostatic combination with polysodium aspartic acid (PASP). Sodium polyacrylic acid (PAAS) and Imidazolin quaternylammonium salt (IQAS) were loaded to the surface of Co Fe2O4/PEI in turn by electrostatic binding method to obtain Co Fe2O4/PEI/PAAS/IQAS nanosphors. all four kinds of nanoparticles were superparamagnetic at room temperature. The saturation magnetization is 70.0 emu/g,65.0 emu/g,59.5 emu/g and 45.4 emu/g., respectively. Co Fe2O4/BTA,Co Fe2O4/PEI/PASP and Co Fe2O4/PEI/PAAS/IQAS nanoparticles were doped into SBS to form films, and a smooth and dense organic coating was obtained. The test results show that the coating with magnetic nanosphere can effectively inhibit the anodic polarization of copper sheet, increase the impedance of the sample and reduce the corrosion current, thus inhibiting the corrosion of copper sheet. Co Fe2O4/PEI/PAAS/IQAS is loaded with two layers of corrosion inhibitor. It has double protective effect, so the anticorrosion performance is the best. The Co Fe2O4/PEI/PAAS/IQAS magnetic nanosphere was doping into SBS coating and tested after scratching. the results showed that the corrosion inhibitor loaded on the surface of magnetic nanosphere was released only by breaking the electrostatic force between the magnetic nanosphere and the magnetic nanosphere under the stimulation of corrosion environment. In order to inhibit the further corrosion of metals, it has obvious self-repair function. The SEBS base and structural layer were tightly coated on the slide surface by piranha solution and silanization treatment, and then the PS-PDMS-PVMS coating with Co Fe2O4/PEI/PAAS/IQAS magnetic nanosphere was coated on it. A hydrophobic, nanometer rough surface is obtained. The results show that the antifouling coating is rough and hydrophobic, and the water contact angle is 114.5 掳. The SEBS coating sample will absorb protein continuously in the process of soaking in BSA-FITC protein solution. However, the PS-PDMS-PVMS coating mixed with magnetic nanosphere almost does not adsorb protein and has obvious antifouling ability.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1
本文编号：2475419
[Abstract]:Magnetic nanomaterials have the dual characteristics of both magnetic materials and nanomaterials. Based on their functionalized surface, magnetic nanomaterials have a very broad application prospect in many fields, such as data storage, biomedicine and environmental treatment. In this paper, magnetic nanorods with different structures were loaded into magnetic nanosphers with different structures as templates, and magnetic nanomaterials with sustained release ability were prepared, and then dispersed in organic coatings to release corrosion inhibitors under environmental stimulation. The anticorrosion and self-repair of metal are realized, and a kind of hydrophobic and rough surface is prepared by using the nanostructure of magnetic nanosphere in polymer coating to show the antifouling ability of the coating. In this paper, Co Fe2O4 magnetic nanospheres with loose structure of about 100 nm, were prepared by solvothermal method. Benzotriazole (BTA) was loaded on its surface by covalent binding, and Co Fe2O4/BTA nanospheres were obtained. The surface of Co Fe2O4 nanoparticles was modified by polyethylene imine (PEI), and then the Co Fe2O4/PEI/PASP nanoparticles were obtained by electrostatic combination with polysodium aspartic acid (PASP). Sodium polyacrylic acid (PAAS) and Imidazolin quaternylammonium salt (IQAS) were loaded to the surface of Co Fe2O4/PEI in turn by electrostatic binding method to obtain Co Fe2O4/PEI/PAAS/IQAS nanosphors. all four kinds of nanoparticles were superparamagnetic at room temperature. The saturation magnetization is 70.0 emu/g,65.0 emu/g,59.5 emu/g and 45.4 emu/g., respectively. Co Fe2O4/BTA,Co Fe2O4/PEI/PASP and Co Fe2O4/PEI/PAAS/IQAS nanoparticles were doped into SBS to form films, and a smooth and dense organic coating was obtained. The test results show that the coating with magnetic nanosphere can effectively inhibit the anodic polarization of copper sheet, increase the impedance of the sample and reduce the corrosion current, thus inhibiting the corrosion of copper sheet. Co Fe2O4/PEI/PAAS/IQAS is loaded with two layers of corrosion inhibitor. It has double protective effect, so the anticorrosion performance is the best. The Co Fe2O4/PEI/PAAS/IQAS magnetic nanosphere was doping into SBS coating and tested after scratching. the results showed that the corrosion inhibitor loaded on the surface of magnetic nanosphere was released only by breaking the electrostatic force between the magnetic nanosphere and the magnetic nanosphere under the stimulation of corrosion environment. In order to inhibit the further corrosion of metals, it has obvious self-repair function. The SEBS base and structural layer were tightly coated on the slide surface by piranha solution and silanization treatment, and then the PS-PDMS-PVMS coating with Co Fe2O4/PEI/PAAS/IQAS magnetic nanosphere was coated on it. A hydrophobic, nanometer rough surface is obtained. The results show that the antifouling coating is rough and hydrophobic, and the water contact angle is 114.5 掳. The SEBS coating sample will absorb protein continuously in the process of soaking in BSA-FITC protein solution. However, the PS-PDMS-PVMS coating mixed with magnetic nanosphere almost does not adsorb protein and has obvious antifouling ability.
【学位授予单位】：武汉理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB383.1
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