本文選題：聚多巴胺　切入點(diǎn)：模板合成　出處：《北京科技大學(xué)》2017年博士論文

【摘要】：聚多巴胺作為一種多聚物材料,具有在任意固體材料表面成膜、易修飾和生物兼容性好等優(yōu)異特性。近年來,該多聚物在涉及固體材料表面修飾的諸多領(lǐng)域都備受關(guān)注。因此,對其理化性質(zhì)和應(yīng)用方向的研究具有重要意義。本論文工作中,研究了基于聚多巴胺的模板法用于二氧化錳陣列納米管的合成;之后,為進(jìn)一步探索聚多巴胺薄膜材料的離子滲透性問題,設(shè)計(jì)了基于普魯士藍(lán)的電化學(xué)探針,研究了薄膜厚度和環(huán)境pH等因素對聚多巴胺薄膜離子滲透性的影響,并討論了其中涉及的機(jī)理;最后,在此基礎(chǔ)上,進(jìn)一步研究了普魯士藍(lán)電極表面聚多巴胺薄膜的修飾對該電極電化學(xué)性能的影響。(1)基于聚多巴胺薄膜的模板法制備二氧化錳陣列納米管的研究本工作使用水熱法在石英玻璃片表面合成了氧化鋅納米棒,以其做為模板,在其表面生成聚多巴胺薄膜,并與高錳酸鉀反應(yīng),合成了二氧化錳陣列納米管。研究發(fā)現(xiàn),所制備的二氧化錳為非晶型,該二氧化錳納米管形態(tài)良好,在基底表面的附著能力強(qiáng)。由于氧化鋅模板具有易合成、易去除且納米形態(tài)易于控制的特點(diǎn);同時(shí),聚多巴胺薄膜的合成方法也簡便易行,這使得該二氧化錳陣列納米管的合成方法具有簡便和適用性廣等特性。該合成方法也對二氧化錳新形態(tài)納米結(jié)構(gòu)材料的構(gòu)建具有一定的啟示作用。(2)基于普魯士藍(lán)電極的聚多巴胺薄膜離子滲透性的電化學(xué)研究聚多巴胺薄膜離子滲透性的研究對該材料在涉及物質(zhì)擴(kuò)散和滲透的吸附、分離、催化以及電化學(xué)分析等方面的應(yīng)用具有重要意義。本工作利用普魯士藍(lán)做為電極,利用其對離子(鉀離子)作為探針,研究了聚多巴胺薄膜的離子滲透性。通過循環(huán)伏安和電化學(xué)交流阻抗等手段,研究了厚度約為23、60和113 nm的聚多巴胺薄膜在不同pH環(huán)境中的離子滲透性變化,系統(tǒng)地總結(jié)了薄膜厚度與環(huán)境pH對聚多巴胺薄膜離子滲透性的影響,并討論了其中涉及的過程和機(jī)理。(3)聚多巴胺薄膜對普魯士藍(lán)電極電化學(xué)性能的影響及相關(guān)電分析應(yīng)用的研究本工作中,在上一章研究基礎(chǔ)上,進(jìn)一步研究了聚多巴胺薄膜的修飾對普魯士藍(lán)電極電化學(xué)性能的影響。研究發(fā)現(xiàn),聚多巴胺薄膜在普魯士藍(lán)電極表面的修飾可有效地提高普魯士藍(lán)在中性溶液中的電化學(xué)穩(wěn)定性,同時(shí),也不影響該電極對過氧化氫的電化學(xué)催化。此外,聚多巴胺薄膜還可有效地阻擋對過氧化氫電化學(xué)檢測過程中常見干擾物(如L-半胱氨酸、抗壞血酸和尿酸等)的電化學(xué)信號,起到較好的抗干擾效果�；诖�,該電極可應(yīng)用于活細(xì)胞過氧化氫的釋放監(jiān)測。
[Abstract]:As a kind of polymer material, polydopamine has many excellent properties such as forming film on any solid material, easy to modify and good biological compatibility. In recent years, the polymer has attracted much attention in many fields involving surface modification of solid materials. In this paper, we studied the template method based on polydopamine for the synthesis of MNO _ 2 nanotubes. In order to further explore the ion permeability of poly (dopamine) thin films, an electrochemical probe based on Prussian blue was designed to study the effects of film thickness and environmental pH on the ion permeability of polydopamine films. Finally, on the basis of this, the mechanism involved is discussed. Further study on the influence of Polydopamine Film Modification on the Surface of Prussian Blue electrode on the Electrochemical Properties of the electrode. (1) preparation of Manganese dioxide Array Nanotubes by template method based on Poly (dopamine) thin Film. Zinc oxide nanorods were synthesized on the surface of quartz glass. Using it as a template, the polydopamine film was formed on the surface and reacted with potassium permanganate to synthesize manganese dioxide array nanotubes. It was found that the prepared manganese dioxide was amorphous, and the manganese dioxide nanotube had good morphology. Because the zinc oxide template is easy to synthesize, easy to remove and easy to control the nano-morphology, at the same time, the synthesis method of the polydopamine film is also simple and feasible. This makes the synthesis method of MNO _ 2 array nanotubes simple and applicable to a wide range of properties. This synthesis method also has a certain enlightenment on the construction of new manganese dioxide nanostructured materials. (2) based on Prussian Blue, the synthesis method of MNO _ 2 nanotubes is based on Prussian Blue. Electrochemical study on the Ion permeability of Poly (dopamine) Film the adsorption of the material on the diffusion and permeation of the material. In this work, Prussian blue is used as electrode and para-ion (potassium ion) as probe. The ion permeability of poly (dopamine) films was studied by cyclic voltammetry and electrochemical impedance spectroscopy. The ion permeability of polydopamine films with thickness of 23 ~ 60 nm and 113 nm was studied in different pH conditions. The effects of film thickness and environmental pH on the ion permeability of polydopamine films were systematically summarized. The effect of polydopamine thin film on the electrochemical performance of Prussian blue electrode and the application of related electrical analysis were discussed. In this work, based on the previous chapter, the effect of polydopamine film on the electrochemical performance of Prussian blue electrode was discussed. The effect of modification of polydopamine film on the electrochemical performance of Prussian blue electrode was further studied. The modification of polydopamine film on the surface of Prussian blue electrode can effectively improve the electrochemical stability of Prussian blue in neutral solution, but also does not affect the electrochemical catalysis of hydrogen peroxide on the electrode. Poly (dopamine) films can also effectively block the electrochemical signals of common interfering substances (such as L-cysteine, ascorbic acid, uric acid, etc.) in the electrochemical detection of hydrogen peroxide. The electrode can be used to monitor the release of hydrogen peroxide from living cells.
【學(xué)位授予單位】：北京科技大學(xué)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2017
【分類號】：TB383.1;O657.1

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本文編號：1697280