本文選題：微納結構 + 微粒噴丸��； 參考：《廣東工業(yè)大學》2016年博士論文

【摘要】：微納多尺度結構對于制備超疏水表面,獲得自清潔性能、抗粘污性能,顯得至關重要。金屬的應用廣泛,使用較多。而鋼是應用較多的金屬之一。鋼因應用廣泛,不免會對表面超疏水性、抗粘污性等性能有要求。因此,鋼基表面微納結構的制備值得研究。本論文提出將微粒噴丸和陽極氧化結合的兩步法,旨在制備鋼基表面微納結構,探索了微粒噴丸構筑微米結構,陽極氧化構筑納米結構。對微納結構進行表征,并研究其潤濕性能、抗粘污性能�；谒苄宰冃卧�,提出了微粒噴丸制備45鋼表面微米結構的方法。利用宏觀和微觀形貌分析、表面輪廓分析、表面粗糙度分析等技術手段,研究所制備的表面微米結構的形貌特征。結果表明,微粒噴丸能夠在鋼基表面構筑凹凸有致的可控表面微米粗糙結構。噴丸壓力、彈丸大小和噴丸時間均對表面微米結構的構筑有影響。通過陽極氧化法,在45鋼表面構筑表面納米結構。探討表面預處理狀態(tài)對鋼陽極氧化的影響,探究噴丸處理對鋼陽極氧化的影響及機制。通過SEM、EDS、XPS、 XRD、Raman、IR等技術手段對陽極氧化膜進行表征,研究了其化學組成、形貌特征。同時對陽極氧化鋼進行了極化曲線測試。結果表明,陽極氧化能夠在45鋼表面構筑納米結構。噴丸預處理對45鋼的陽極氧化有促進作用。45鋼陽極氧化膜的外觀顏色為黃色,隨陽極氧化電流密度增大,顏色加深,在相同的電流密度條件下,隨著陽極氧化時間增加,顏色變深。陽極氧化膜主要含F(xiàn)e、O、C、F元素。Fe以三價形式存在。陽極氧化產物主要為α-Fe2O3,還有FeOOH。與未陽極氧化45鋼相比,陽極氧化45鋼的自腐蝕電位高,自腐蝕電流密度低,耐蝕性有所提升。通過兩步法,在45鋼表面制備微納多尺度結構。通過SEM、AFM等技術手段,對該微納結構進行研究,揭示其形貌特征。對兩步法制備的45表面微納結構的潤濕性進行研究,探索表面結構對潤濕性的影響以及表面化學修飾對潤濕性的影響。結果表明,微納結構的主要特征是納米結構疊加在微米結構之上。微米結構主要是凹凸起伏的紋理。納米結構是以花狀團簇為典型形貌特征。納米結構形貌受陽極氧化電流密度影響。表面結構能決定表面接觸角的大小。化學修飾前,具有多微納尺度粗糙結構的表面的接觸角最低。經化學修飾后,具有微納結構的表面接觸角最大,呈超疏水性。相比之下,全氟癸基三氯硅烷的修飾效果比硬脂酸的好。將兩步法制備的微納結構應用于抗粘污涂層中。通過兩步法制備出表面微納結構,并經化學修飾,制各出具有超疏水性的微納多尺度結構涂層,將該涂層應用于橡膠硫化模具抗粘污。對比研究結果表明,化學修飾降低了表面的自由能,起到了減少表面污染的作用。表面結構對防污染性能有影響。微納結構是一種多尺度結構,能“托起”污染物,減小了表面與污染物的真實接觸面積,使污染降低。
[Abstract]:The micro-nano-multi-scale structure is very important for the preparation of superhydrophobic surfaces to obtain self-cleaning and anti-fouling properties. Metals are widely used and are widely used. Steel is one of the metals that are widely used. Due to the wide application of steel, surface hydrophobicity, anti-fouling and other properties are required. Therefore, the preparation of steel-based surface microstructures is worth studying. In this paper, a two-step method combining particle peening and anodic oxidation was proposed to prepare the micro-nano structure of steel substrate, and to explore the micron structure of microparticle shot peening and nanostructure of anodic oxidation. The microstructures were characterized and their wettability and anti-fouling properties were studied. Based on the principle of plastic deformation, a method for fabricating microstructures on 45 steel surface by shot peening was proposed. By means of macro and micro morphology analysis, surface profile analysis and surface roughness analysis, the morphology characteristics of the prepared surface microstructures were studied. The results show that the micrometer rough structure of the controlled surface can be constructed by shot peening on the steel substrate. Shot peening pressure, shot size and shot peening time all influence the construction of surface micron structure. Surface nanostructures were constructed on the surface of 45 steel by anodic oxidation. The effect of surface pretreatment on anodic oxidation of steel and the mechanism of shot peening on anodic oxidation of steel were discussed. The anodic oxide films were characterized by means of SEM-EDSX XPS, XRD- Ramanhe IR, and their chemical composition and morphology were studied. At the same time, the polarization curve of anodized steel was measured. The results show that the anodic oxidation can construct nanostructures on the surface of 45 steel. Shot peening pretreatment can promote anodic oxidation of 45 steel. The appearance color of anodic oxide film of 45 steel is yellow. With the increase of anodizing current density, the color of anodic oxidation film deepens. At the same current density, the anodic oxidation time increases with the increase of anodic oxidation time. The color darkened. The anodic oxide film mainly contains Fe _ 2O _ C _ (F) element. Fe exists in the form of trivalent. The anodized products are mainly 偽 -Fe _ 2O _ 3 and FeOOH. Compared with 45 steel without anodizing, the corrosion resistance of 45 steel was improved with higher corrosion potential, lower corrosion current density and higher corrosion resistance. The micro-nano-multi-scale structure was prepared on the surface of 45 steel by two-step method. The microstructures were investigated by means of SEMMA-AFM, and the morphology of the microstructures was revealed. The wettability of 45 surface microstructures prepared by two-step method was studied to explore the effect of surface structure on wettability and the effect of surface chemical modification on wettability. The results show that the main feature of microstructures is that nanostructures are superimposed on micron structures. Micron structures are mainly ups and downs of the texture. The typical morphology of nanostructures is floral clusters. The morphology of nanostructures is affected by the current density of anodic oxidation. The surface structure can determine the contact angle of the surface. Before chemical modification, the surface with multi-micro-nano-scale rough structure has the lowest contact angle. After chemical modification, the surface contact angle with micro and nano structure is the largest and superhydrophobic. In contrast, perfluorodecyl trichlorosilane is more effective than stearic acid. The micro-nano structure prepared by two-step method was applied to anti-fouling coating. The surface micro-nano structure was prepared by two-step method. After chemical modification, micro-nano multi-scale structure coatings with super hydrophobicity were prepared. The coating was applied to rubber vulcanization mould to resist adhesion and fouling. The results show that chemical modification reduces the free energy of the surface and reduces the surface pollution. The surface structure has an effect on the anti-pollution performance. Micro-nano structure is a multi-scale structure, which can "lift" pollutants, reduce the real contact area between the surface and pollutants, and reduce the pollution.
【學位授予單位】：廣東工業(yè)大學
【學位級別】：博士
【學位授予年份】：2016
【分類號】：TG174.4
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本文編號：1850531