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利用聚多巴胺改質奈米粒子及其應用 = Modification and ...

國立高雄大學化學工程及材料工程學系碩士班

利用聚多巴胺改質奈米粒子及其應用 = Modification and applications of metal oxide nanoparticles using polydopamine

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Modification and applications of metal oxide nanoparticles using polydopamine
作者:	黃靖淵,
其他團體作者:	國立高雄大學
出版地:	高雄市
出版者:	國立高雄大學;
出版年:	2013[民102]
面頁冊數:	99葉圖，表格 : 30公分;
標題:	勃姆石
標題:	Boehmite NPs (BNPs)
電子資源:	https://hdl.handle.net/11296/tp7em2
附註:	107年11月1日公開
附註:	參考書目：葉94-99
摘要註:	隨著環保意識抬頭和對塑料表面的抗刮要求，為了加強表面抗刮性，最簡單的方式為塗佈一層樹脂層在塑膠表面上，有許多鍍膜方法被研發應用，而最多人應用的為有機/無機溶膠-凝膠複合塗料，其方法為加入矽烷耦合劑耦合有機/無機相，由於矽烷偶合劑容易與水產水解反應，因此其溶劑通常都是醇類，為了改善有機溶劑的使用，在我們的研究裡使用溶膠-凝膠法，在一個低的溫度(80℃)，合成出平均粒徑為13nm、穿透度80%以上的奈米柱，均勻分散在水裡，而整個製程為水相製成。為了將有機(Epoxy)和無機(Boehmite NPs(BNPs))材料互相耦合，需要一個合適的水性改質劑，我們選擇一個水可溶性偶合劑-多巴胺。多巴胺被發現存在於人體和貽貝類裡，因此是一個對環境和人體無害的改質劑。在改質方面利用臭氧加速反應，使奈米顆粒表面可以包覆一層較薄的聚多巴胺層，由於胺根帶有正電荷，使其可以在pH值為4的溶液中均勻分散。然而實驗數據顯示，在與Epoxy混摻時會遇到酸鹼性變化的問題，導致粒子沉澱，因此導入雙性分子Dopamine sulfonate (DS)，從UV-Vis光譜顯示，使用DS改質前，BNPs穿透度在80%以上；改質後，穿透度可以達到90%。使用DS改質BNPs並與Epo-xy均勻混摻後，其薄膜之粒子含量為6.5wt%時，具有80%以上穿透度。從SEM照片觀察，使用未改質的粒子與Epoxy混摻鍍膜後，其表面有大面積的團聚，而使用DS改質之粒子與Epoxy混摻鍍膜後，其表面形貌較平坦，也較少粒子團聚。原本硬度在HB-H的PET基板在塗上Epoxy後硬度提升至H-2H，塗佈DS改質之粒子與Epoxy複合的複合薄膜，其粒子含量在6.5wt%~9wt%，硬度可達3H-4H。實驗顯示，多巴胺除了可以改質BNPs，也可改質金屬氧化物:如SiO2、TiO2，在TEM、Raman、ESCA等儀器鑑定下，可以證明我們成功地將多巴胺改質於表面，在未來的應用上，多巴胺可以應用在更多不同粒子在水相中的改質，藉而取代許多矽烷類的耦合劑。 With increasing demands for surface hardening treatment and eco-friendly coating on plastic devices, there are many studies developing better coating techniques. One of surface coatings is to enhance surface strength via coating some hardening organic/inorganic composites with scratch-resistant property on their surface. Most of coating composites using silicone-containing coupling agents are prepared by adding matured nanoparticles into polymer, with some organic solvents (alcohols in most cases) for dilution. In the study, we modified a water-based epoxy resin with addition of boehmite nanoparticles(BNPs), to improve mechanical properties of coating surfaces. BNPs nanorods were synthesized via sol-gel method at a low temperature (80℃) and in a water-based process, giving small size nanorods (13 nm diameter in average) with good transparency (greater than 80%) and stable for dispersion in water. Dopamine(Da) is founded in human's brainstem and mussels, a kind of water based coupling agent, human-friendly and eco-friendly. Water-based epoxy resin was used as the coating substrate for some benefits: solvent-free, human-friendly, environment-friendly features. We also firstly modified the boehmite surface using an water-borne modifier: dopamine (0.002 g/ml) with O3 catalyzed to improve dispersion stability of nanoparticles via positive charged surface in pH 4. While when we mixed BNPs@Da into Epoxy resin(pH=8~9) BNPs was precipitated because of different pH value. Dopamine Sulfonate(DS) was synthesized to solve pH value problem, BNPs was modified with DS. From TEM photos UV-Vis spectra and ESCA spectra we have successfully modified boehmite surface, the transparency of the DS modified boehmite was 90% higher than that of prime boehmite. SEM photographs showed the prime nanoparticles were agglomerated in the mixture of water-based epoxy resin; while DS-modified nanoparticles were dispersed well in epoxy resin. In pencil hardness test, DS-modified nanoparticle/epoxy film displayed a higher hardness as 3H-4H and higher transparency over 80%, compared to 1H of the original PET substrate, and 2H of prime epoxy coating. In addition to modify boehmite, metal oxides as SiO2 and TiO2 were able to be modified via dopamine according to analysis of TEM, Raman spectra, and ESCA. Dopamine shows its potential as a water-based modifier to replace some silane-based coupling agents using in aqueous state.

利用聚多巴胺改質奈米粒子及其應用 = Modification and applications of metal oxide nanoparticles using polydopamine
黃, 靖淵

利用聚多巴胺改質奈米粒子及其應用 = Modification and applications of metal oxide nanoparticles using polydopamine / 黃靖淵撰 - 高雄市 : 國立高雄大學, 2013[民102]. - 99葉 ; 圖，表格 ; 30公分.
107年11月1日公開參考書目：葉94-99.
勃姆石Boehmite NPs (BNPs)

利用聚多巴胺改質奈米粒子及其應用 = Modification and applications of metal oxide nanoparticles using polydopamine
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