非传统方法制备聚合物图案及其碳管阵列生长应用研究

With the development of material science, solo monolith and thin film materials cannot meet the integrated and intelligent requirement. The advanced functions are realized by micro-pattern. Based on our previous preliminary research, the ordered structures on 2D and 3D can be realized. The structures can be easily adjusted and chemically modified. Starting from molecular design, a series of novel block copolymer are synthesized. Large-scale, defect-free and single domain micro-patterns are prepared on substrate with static breath figure and controlled mesoscopic dewetting process. Templating from the micro-patterned polymer films, inorganic micro-patterns are formed after UV cross-linking and sequent calcinations. The obtained inorganic micro-patterns are catalytically functionalized, which can initiate the growth of carbon nanotube (CNT) arrays by chemical vapor deposition. Ordered CNT arrays perpendicular to substrate are formed by selecting catalysts, modifying the substrate surface and adjusting pattern morphology. The CNT arrays have excellent field emission properties which can be further improved by etching or doping. The relationship between the morphology and field emission will investigated through.

随着材料科学的发展，单纯的体相材料或膜材料无法胜任高集成、高智能的需要，越来越多的材料需要通过微观图案化来实现更高级的功能。经过前期大量基础研究，我们可以方便地利用自下而上的方法制备二维、三维尺度上的有序结构。它们具有形貌可控可调、易于化学修饰等诸多优点。本研究拟从聚合物分子设计、合成出发，利用静态呼吸图法和溶剂受限挥发方法，精确调控聚合物/催化剂前驱体膜在基板上的形貌和多级结构，并实现大面积、无缺陷、单畴化。以此为模板，经过交联、热解等处理，得到预期结构的无机图案，以化学气相沉积法制备碳管阵列。通过形貌调控、催化剂的选择、基板表面改性、CVD工艺条件控制等多种方法在基板上实现高度取向、结构可控、规整碳管阵列。进一步以掺杂、刻蚀的方法优化场发射性质，并实现较好的重现性。系统研究结构形貌和多级结构与场发射强度与增强因子之间的关系，筛选出最优结构和形貌并实现器件化。

随着材料科学的快速发展，传统的膜材料无法满足智能化的需求，材料表面的微观图案化越来越受到重视。静态呼吸图法就是一种利用冷凝液滴为模板制备聚合物多孔阵列的方法。经过前期研究，我们可以实现了静态呼吸图法制备二维、三维尺度上的有序阵列。在对形态呼吸图阵列进行形貌可调和化学修饰的同时进一步地探究呼吸图的形成机理。本研究从聚合物分子设计和合成出发，利用呼吸图气氛调控多孔聚合物膜的阵列和孔结构并探讨呼吸图的形成机理。基于二维胶体晶体完成了纳米环制备和图案化碳纳米管生长等工作。结合超交联法制备了多级孔聚合物薄膜并对其性能进行优化，扩展了静态呼吸图法在聚合物图案化领域的应用。