基于液相沉积法的有序多孔膜表面涂层构建及其性能研究

发布时间：2018-08-13 12:13

【摘要】：液相沉积法是制备聚合物涂层的重要方法,在科学研究和实际应用中都发挥着重要作用。有序多孔膜具有孔径均一、结构规整的特点,在精密过滤、模板材料、细胞培养等多个领域有着重要的价值。利用液相沉积法在有序多孔膜表面形成聚合物涂层,并且通过后反应的方法,可以赋予有序多孔膜新的性能,如超疏水性和可控黏附性等。本文以呼吸图法制备的有序多孔膜为研究对象,着重研究了有序多孔膜在沉积多巴胺后的浸润性和黏附性能,并且探索了低黏与高黏有序多孔膜在液滴操控等领域的应用。另一方面,受核桃青皮黏附性质的启发,我们考察了核桃青皮中的活性物质—胡桃醌作为液相沉积前驱分子的可行性。胡桃醌是仅含有一个酚羟基的物质,这与多巴胺和单宁酸等含有邻苯二酚基团不同。这种黏附性与分子结构的独特性促使我们研究它的沉积行为,以期可以在有序多孔膜表面上形成聚合物涂层并带来新的性质。主要取得了以下两个方面的研究结果:1.采用呼吸图法制备了蜂窝状和针垫状有序多孔膜,然后在蜂窝状和针垫状有序多孔膜表面构建聚多巴胺涂层,还原硝酸银生成银纳米粒子后与1H,1H,2H,2H-全氟癸硫醇反应,分别得到了具有高黏附和较低黏附性能的超疏水表面,实现了对有序多孔膜表面黏附性能的可控调节。具体考察了多巴胺沉积时间和还原硝酸银的量对有序多孔膜表面浸润性的影响,并对膜表面形貌和化学组成进行了表征。研究了蜂窝状与针垫状有序多孔膜对水滴的黏附性能,并在蜂窝状有序多孔膜表面制备了针垫状结构的图案。利用图案化的有序多孔膜表面实现了液滴的无损转移、收集与定向运动等应用;2.探索了胡桃醌在不同类型基底表面,如聚合物、金属/金属氧化物、矿物表面的沉积行为。提出了胡桃醌的单独沉积具有基底选择性。进一步发现胡桃醌的基底选择性可以通过共沉积来改变,即胡桃醌与单氨基共沉积体系可以保持其基底选择性;与多氨基分子的共沉积则有助于在所有种类的基底上形成具有高稳定性的通用涂层。
[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.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TB306

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