2008-08-012024-05-14https://scholars.lib.ntu.edu.tw/handle/123456789/657691摘要：近年來為了解決日益嚴重的塑膠廢棄物問題，許多研究單位皆積極開發環保性固態材料。澱粉為價格便宜、產量穩定、且具備塑膠高分子加工特性之大宗穀物原料，適合作為環保性材料之來源。雖然在乾燥環境下，澱粉材料具有良好之氣體阻隔性及機械強度，但是親水性的澱粉分子結構卻使得材料性質容易受到環境相對濕度影響而不穩定，限制了澱粉材料的應用。隨著奈米科技的進步，奈米技術廣泛地被應用於不同的領域，而奈米塗覆為其中新穎的材料表面改質之方法。利用正負電荷分子相互層層吸附自組裝排列於材料表面，形成奈米級厚度之薄膜而提升材料性質或使材料表面達到特定之功能。此類技術之研究與發展目前主要應用於光電元件、感測器、生醫材料及藥物釋放，而以奈米塗覆改變環保性材料表面性質之相關文獻則相當缺乏，但此研究方向極具有發展成為克服環保性材料親水性之有效方法之潛力。因此，本前瞻性研究計畫目標之主要目的分為(1)製備適合作為奈米塗覆之正電澱粉溶液、(2)探討正電澱粉與負電介面活性劑以層自組裝形成奈米尺度之薄膜結構及性質、(3)評估及開發此奈米塗料披覆於環保性澱粉材料於食品及非食品之未來應用之可能性。<br> Abstract: Recently, many research groups have devoted in the field of development of the environmental-friendly solid-state materials due to the un-degradable waste is becoming a global environmental problem. Starch is considered as one of the most promising biomaterials because it is abundant and relatively inexpensive, and possesses thermoplastic property of plastics. Although the materials made from starch are good with gas permeability and mechanical strength when the materials are in a dry state, the materials are sensitive to moisture, and their structures and properties are easily changed with surrounding humidity, which results in their limited applications. With the advances in nanotechnology, the nano-scale materials has been used in a vast array of industrial and consumer products and nanocoating is one of the novel surface modification methods. The oppositely charged polyelectrolytes sequentially deposit on surfaces of materials to create nano-scale thin films with the desired function. The recent development and application of the technology is mainly focused on optical/electric devices, sensors, bio-implants, and drug delivery. However, studies on the synthesis and properties of nanocoating on environment-friendly materials have not been explored to any significant extent and it has a highly potential application in these materials. Thus, the aims of this project are (1) optimizing of preparation conditions for obtaining the cationic starch solution which is desired for nanocoating, (2) investigating the structure and properties of thin films synthesized from layer-by-layer assembly of cationic starch and negative-charged surfactant, and (3) establishing the application methods of the nanocoating on environment-friendly starch-based materials for food and non-food applications.澱粉奈米塗覆逐層組裝生物材料生物可分解starchnanocoatinglayer-by-layer assemblybiomaterialsbiodegradable