本文選題：超疏水 + 自修復�。� 參考：《陜西科技大學》2017年碩士論文

【摘要】：超疏水表面具有優(yōu)異的自清潔性、防污性、防結冰、抗腐蝕等性能而引起了人們的關注。但是,目前限制超疏水表面實際應用的一個最關鍵因素是涂層的耐用性不佳。賦予表面超疏水性能的自修復性是解決涂層牢度的一種有效途徑。本課題基于制備超疏水表面的兩個基本條件進行設計,分別通過低表面能物質的遷移以及微納粗糙結構的重現實現表面超疏水性能的自修復。(1)利用十八胺(ODA)的微觀結構組裝作用構筑微納粗糙結構,采用溶液浸漬法,將聚二甲基硅氧烷(PDMS)和ODA的共混液一步涂覆到聚對苯二甲酸乙二酯(PET)纖維表面,實現超疏水PET織物的制備。采用場發(fā)射掃描電鏡對織物表面形貌進行觀察;采用氧等離子體刻蝕技術破壞涂層低表面能性質,用水滴接觸角測量儀檢測超疏水性能的自修復性和穩(wěn)定性。研究表明,制備的涂層表面的超疏水性具有優(yōu)異的耐酸堿、耐水洗以及耐摩擦穩(wěn)定性。同時,經氧等離子體刻蝕使得表面失去超疏水性后,通過室溫放置或加熱等條件即可使涂層通過內部PDMS/ODA分子鏈段的遷移恢復到原始的超疏水狀態(tài)。(2)采用硬模板法制備中空介孔SiO_2納米顆粒(HMSNs),以聚苯乙烯(PS)為模板,十六烷基三甲基溴化銨(CTAB)為致孔劑,正硅酸乙酯為硅源,水解縮合后得到PS/SiO_2核殼顆粒,再經煅燒去除PS及CTAB后獲得HMSNs。將十二烷基三甲氧基硅烷負載于顆粒內部,與PDMS先后連續(xù)噴涂于玻璃基材表面,實現超疏水表面的構筑。涂層耐磨性研究表明,在連續(xù)摩擦的過程中,涂層表面的HMSNs會暴露空腔結構而形成新的粗糙結構,從而使其通過微納粗糙結構重現結合涂層中低表面能物質的顯露實現表面超疏水性能的自修復。本課題分別利用低表面能物質PDMS/ODA的遷移,以及HMSNs在摩擦過程中微納粗糙結構重現的原理,實現了自修復超疏水表面的制備。該研究對延長超疏水表面的使用壽命,推進其在實際工業(yè)中的應用奠定了一定的理論和實驗基礎。
[Abstract]:Superhydrophobic surfaces have attracted much attention due to their excellent self-cleaning, anti-fouling, anti-icing and anti-corrosion properties. However, one of the key factors limiting the practical application of superhydrophobic surfaces is the poor durability of the coatings. Self-repairing of surface superhydrophobic property is an effective way to solve the coating fastness. This subject is based on two basic conditions of preparing superhydrophobic surface. The self-repair of surface superhydrophobicity is realized by the migration of low surface energy material and the reconstruction of micro-nano rough structure. (1) the micro-nano rough structure is constructed by using octadecylamine (ODA) microstructure assembly, and the solution impregnation method is used. Poly (dimethylsiloxane) (PDMS) and ODA blends were coated on the surface of poly (ethylene terephthalate) (PET) fiber in one step to prepare superhydrophobic PET fabric. The surface morphology of the fabric was observed by field emission scanning electron microscope (SEM), the low surface energy property of the coating was destroyed by oxygen plasma etching technique, and the self-repair and stability of superhydrophobic properties were tested by water drop contact angle measuring instrument. The results show that the superhydrophobicity of the coating has excellent resistance to acid and alkali, washing and friction. At the same time, after oxygen plasma etching, the surface loses its hydrophobicity. The transfer of PDMS / ODA molecular segments into the original superhydrophobic state can be restored by room temperature or heating conditions. (2) Hollow mesoporous SiOStack2 nanoparticles (HMSNs) were prepared by hard template method, and polystyrene (PS) was used as template. Cetyltrimethylammonium bromide (CTAB) was used as pore-forming agent and ethyl orthosilicate as silicon source. PS- / SiO-2 core-shell particles were obtained by hydrolysis and condensation. HMSNs were obtained by calcination of PS and CTAB. Dodecyl trimethoxysilane was loaded inside the particles and then continuously sprayed with PDMS on the glass substrate surface to realize the construction of superhydrophobic surface. The wear resistance of the coating shows that the HMSNs on the coating surface will expose the cavity structure and form a new rough structure during continuous friction. Thus, the self-repair of superhydrophobic properties of the coating can be realized by micro-nano rough structure reconstruction combined with the exposure of the low surface energy material of the coating. In this paper, the self-repairing superhydrophobic surface was prepared by using the migration of PDMS / ODA and the principle of micro-nano rough structure reconstruction of HMSNs during friction. This study has laid a theoretical and experimental foundation for prolonging the service life of superhydrophobic surface and promoting its application in practical industry.
【學位授予單位】：陜西科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O647

【參考文獻】

相關期刊論文 前1條

1 江雷;從自然到仿生的超疏水納米界面材料[J];化工進展;2003年12期

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本文編號：2100276