發(fā)布時間：2018-08-13 12:13

【摘要】：液相沉積法是制備聚合物涂層的重要方法,在科學(xué)研究和實際應(yīng)用中都發(fā)揮著重要作用。有序多孔膜具有孔徑均一、結(jié)構(gòu)規(guī)整的特點,在精密過濾、模板材料、細(xì)胞培養(yǎng)等多個領(lǐng)域有著重要的價值。利用液相沉積法在有序多孔膜表面形成聚合物涂層,并且通過后反應(yīng)的方法,可以賦予有序多孔膜新的性能,如超疏水性和可控黏附性等。本文以呼吸圖法制備的有序多孔膜為研究對象,著重研究了有序多孔膜在沉積多巴胺后的浸潤性和黏附性能,并且探索了低黏與高黏有序多孔膜在液滴操控等領(lǐng)域的應(yīng)用。另一方面,受核桃青皮黏附性質(zhì)的啟發(fā),我們考察了核桃青皮中的活性物質(zhì)—胡桃醌作為液相沉積前驅(qū)分子的可行性。胡桃醌是僅含有一個酚羥基的物質(zhì),這與多巴胺和單寧酸等含有鄰苯二酚基團(tuán)不同。這種黏附性與分子結(jié)構(gòu)的獨特性促使我們研究它的沉積行為,以期可以在有序多孔膜表面上形成聚合物涂層并帶來新的性質(zhì)。主要取得了以下兩個方面的研究結(jié)果:1.采用呼吸圖法制備了蜂窩狀和針墊狀有序多孔膜,然后在蜂窩狀和針墊狀有序多孔膜表面構(gòu)建聚多巴胺涂層,還原硝酸銀生成銀納米粒子后與1H,1H,2H,2H-全氟癸硫醇反應(yīng),分別得到了具有高黏附和較低黏附性能的超疏水表面,實現(xiàn)了對有序多孔膜表面黏附性能的可控調(diào)節(jié)。具體考察了多巴胺沉積時間和還原硝酸銀的量對有序多孔膜表面浸潤性的影響,并對膜表面形貌和化學(xué)組成進(jìn)行了表征。研究了蜂窩狀與針墊狀有序多孔膜對水滴的黏附性能,并在蜂窩狀有序多孔膜表面制備了針墊狀結(jié)構(gòu)的圖案。利用圖案化的有序多孔膜表面實現(xiàn)了液滴的無損轉(zhuǎn)移、收集與定向運動等應(yīng)用;2.探索了胡桃醌在不同類型基底表面,如聚合物、金屬/金屬氧化物、礦物表面的沉積行為。提出了胡桃醌的單獨沉積具有基底選擇性。進(jìn)一步發(fā)現(xiàn)胡桃醌的基底選擇性可以通過共沉積來改變,即胡桃醌與單氨基共沉積體系可以保持其基底選擇性;與多氨基分子的共沉積則有助于在所有種類的基底上形成具有高穩(wěn)定性的通用涂層。
[Abstract]:Liquid deposition is an important method for preparing polymer coatings, which plays an important role in scientific research and practical application. The ordered porous membrane has the characteristics of uniform pore size and regular structure. It has important value in many fields, such as precision filtration, template material, cell culture and so on. Polymer coatings were formed on the surface of ordered porous films by liquid phase deposition, and new properties such as superhydrophobicity and controllable adhesion could be given to the ordered porous membranes by post-reaction method. In this paper, the ordered porous membrane prepared by breathing graph method was used as the research object. The wettability and adhesion of the ordered porous membrane after dopamine deposition were studied, and the applications of low viscosity and high viscosity ordered porous membrane in droplet manipulation were explored. On the other hand, inspired by the adhesive properties of walnut green peel, we investigated the feasibility of using walnut quinone as a precursor of liquid deposition. Walnut quinone is a substance containing only one phenolic hydroxyl group, which is different from dopamine and tannic acid containing catechol groups. This kind of adhesion and the unique molecular structure urge us to study its deposition behavior in order to form polymer coating on the surface of ordered porous film and bring about new properties. Mainly obtained the following two aspects of the research results: 1. Honeycomb and needle matted ordered porous membranes were prepared by respiration method. Then polydopamine coatings were prepared on the honeycomb and needle matted ordered porous membranes. Silver nanoparticles were reduced to silver nanoparticles and reacted with 1H ~ (-1) H ~ (-1) H ~ (2) H _ (2) H _ (2) H _ (2) H _ (2) H _ (fluoro) -decyl mercaptan. The superhydrophobic surfaces with high adhesion and low adhesion properties were obtained, and the adhesion properties of the ordered porous films were controlled. The effects of dopamine deposition time and amount of reducing silver nitrate on the surface wettability of ordered porous membranes were investigated. The surface morphology and chemical composition of the films were characterized. The adhesion properties of honeycomb and needle cushion ordered porous membranes to water droplets were studied and the patterns of needle cushion structure were prepared on the surface of honeycomb ordered porous membranes. Using patterned ordered porous membrane surface to realize the lossless transfer of droplets, collection and directional movement and other applications. The deposition behavior of walnut quinone on different substrates, such as polymer, metal / metal oxide and mineral surface, was investigated. It is suggested that the sole deposition of walnut quinone has substrate selectivity. It is further found that the substrate selectivity can be changed by co-deposition, that is, the substrate selectivity can be maintained by the co-deposition system of pectin and monoamino. Co-deposition with polyamines helps to form general coatings with high stability on all kinds of substrates.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TB306

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相關(guān)期刊論文 前3條

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本文編號：2180958