【摘要】：磁性納米材料兼具磁性材料和納米材料的雙重特性,基于其易功能化的表面,在數(shù)據(jù)存儲(chǔ)、生物醫(yī)藥及環(huán)境治理等很多領(lǐng)域具有非常廣闊的應(yīng)用前景。本文以磁性納米球?yàn)槟０?將不同結(jié)構(gòu)的緩蝕劑分子裝載于磁性納米球,制備具有緩釋能力的磁性納米材料,進(jìn)而將其分散于有機(jī)涂層中,使之在環(huán)境刺激下釋放出緩蝕劑,實(shí)現(xiàn)對(duì)金屬的防腐和自修復(fù),并利用磁性納米球在聚合物涂層中的納米結(jié)構(gòu)制備一類(lèi)疏水、粗糙性表面而展現(xiàn)涂層的抗污能力。本文采用溶劑熱法制備了尺寸約為100 nm、結(jié)構(gòu)疏松的Co Fe2O4磁性納米球。將苯并三唑(BTA)以共價(jià)結(jié)合的方式裝載至其表面,得到Co Fe2O4/BTA納米球。利用聚乙烯亞胺(PEI)對(duì)Co Fe2O4納米球進(jìn)行表面改性,進(jìn)而與聚天冬氨酸鈉(PASP)靜電結(jié)合,得到Co Fe2O4/PEI/PASP納米球。同樣采用靜電結(jié)合法將聚丙烯酸鈉(PAAS)和咪唑啉季銨鹽(IQAS)依次裝載至Co Fe2O4/PEI表面,得到Co Fe2O4/PEI/PAAS/IQAS納米球,這四種納米球在室溫下均具有超順磁性,飽和磁化強(qiáng)度依次為70.0 emu/g、65.0 emu/g、59.5 emu/g和45.4 emu/g。將Co Fe2O4/BTA、Co Fe2O4/PEI/PASP和Co Fe2O4/PEI/PAAS/IQAS納米球分別摻雜在SBS中成膜,得到了表面平整、致密的有機(jī)涂層。測(cè)試結(jié)果表明,摻雜了磁性納米球的涂層可以有效抑制銅片的陽(yáng)極極化,增大樣品阻抗,降低腐蝕電流,從而抑制銅片的腐蝕。Co Fe2O4/PEI/PAAS/IQAS由于負(fù)載了兩層緩蝕劑,具有雙重防護(hù)作用,因而防腐性能最優(yōu)。將Co Fe2O4/PEI/PAAS/IQAS磁性納米球摻雜于SBS涂層中,劃痕后進(jìn)行測(cè)試,結(jié)果表明,磁性納米球表面裝載的緩蝕劑只在腐蝕環(huán)境刺激下,打破與磁性納米球之間的靜電力而釋放,從而抑制金屬的進(jìn)一步腐蝕,具有明顯的自修復(fù)功能。通過(guò)對(duì)玻片表面進(jìn)行piranha溶液和硅烷化處理,將SEBS基層和結(jié)構(gòu)層緊密涂覆在玻片表面,然后將摻雜了Co Fe2O4/PEI/PAAS/IQAS磁性納米球的PS-PDMS-PVMS涂層涂覆于其上,得到一種疏水性、納米級(jí)粗糙的表面。測(cè)試結(jié)果表明,該防污涂層比較粗糙,且為疏水性表面,水接觸角為114.5°,SEBS涂層樣品在浸泡于BSA-FITC蛋白質(zhì)溶液過(guò)程中會(huì)不斷吸附蛋白質(zhì),而摻雜了磁性納米球的PS-PDMS-PVMS涂層幾乎不吸附蛋白質(zhì),具有明顯的防污能力。
[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 擄. 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.
【學(xué)位授予單位】：武漢理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TB383.1

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