工學院: 高分子科學與工程學研究所指導教授: 鄭如忠呂志聖Lu, Chih-ShengChih-ShengLu2017-03-032018-06-292017-03-032018-06-292016http://ntur.lib.ntu.edu.tw//handle/246246/274283微米或奈米級尺度的表面微結構對於材料表面的潤濕與親疏水性質表現有很大的影響，很多系統利用微結構的調控來做到控制表面潤濕性質。近年來，科學家透過設計表面微結構而達到”超疏水”或是”超疏油”等等的表面。 許多研究對形狀記憶材料的表面微結構進行控制，改變了表面親疏水性，再透過材料可逆的形狀固定與形狀回復特性，表面還能夠達到不同程度的粗糙度；傳統製造表面微結構的方法大部分都是利用上而下(Top-down)的方式，包括模具成型，熱雕紋或是其他後加工的方式達到，成本較高且步驟繁複。 在此研究中，透過分子工程設計與製程改良，設計出下而上(buttom-up)的方式製造形狀記憶材料表面的微結構。利用實驗室特有的雙親性樹枝狀高分子與具有形狀記憶性質的聚氨酯，輔以改良的direct breath figure方法於聚氨酯表面自組裝(self-assembly)排列成規則蜂窩狀孔洞，製造出表面的微米尺度微結構，同時具有形狀記憶的性質，可以經由拉伸來使孔洞伸長，再藉由升溫使孔洞回復成原來的形狀，不同形狀的孔洞就有不同的表面粗糙度，達到不同的親疏水性。 利用自組裝行為的方法相較於其他後來加工的方式有著(1)較簡化的製程，(2)得到規則孔洞並，同時保有形狀記憶行為的優勢。此外，透過聚氨酯側鏈上的反應性官能基azetidine-2,4-dione，與交聯劑1,6-己二胺進行開環交聯反應來更進一步加強形狀記憶性質與高溫下的機械性質，最後證實形狀拉伸與回復造成表面微結構的變化，可以調控表面的親疏水性。Micro-/nano structure of surface has a significant effect on wetting regimes. There are many different models to deal with surface wettibility through topography. This approach has been used to create superhydrophobic, or superoleophobic surfaces. Concerning active surface topography, some examples of patterned surfaces from shape memory materials, and the shape recovery of patterned structure has also been demonstrated. However, these surface patterns are made by replica molding, thermal embossing lithography or other dry processes, which cost more and are more complicated. In this research, by molecule design and process improvement, we designed a “buttom-up” method to pattern the surface of shape memory material. We took advantage of self-assembling of amphiphilic dendrons to pattern the shape memory polyurethane surface by modified direct breath figure(DBF) method, achieving microstructure on surface with shape memory behavior. Through this methodology, we can (1) simpilify the fabrication process and (2) achieve uniform surface microstructure and good mechenical properties simultaneously. Moreover, by the crosslinking reaction between azetidine-2,4-dione on the side-chain of pokyurethane and 1,6-diaminohexane, the mechanical properties and shape memory characteristics can be enhanced. Consequently, the change of wettibility by microstructure deformation is achieved by heating the material to the switching temperature.8335360 bytesapplication/pdf論文公開時間: 2019/8/24論文使用權限: 同意有償授權(權利金給回饋學校)Breath figure形狀記憶聚胺酯自組裝交聯親疏水breath figureshape memorypolyurethaneself-assemblingcrosslinkingwettabilitythesis10.6342/NTU201601952http://ntur.lib.ntu.edu.tw/bitstream/246246/274283/1/ntu-105-R03549026-1.pdf