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溶膠－凝膠法製備聚乳酸/金屬氧化物奈米複合材料之特性研究 = Prepa...

國立高雄大學化學工程及材料工程學系碩士班

溶膠－凝膠法製備聚乳酸/金屬氧化物奈米複合材料之特性研究 = Preparation and Characterization of the Poly(l-lactic acid)/Metallic Oxide Nanocomposites by the Sol-gel Processing

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Preparation and Characterization of the Poly(l-lactic acid)/Metallic Oxide Nanocomposites by the Sol-gel Processing
作者:	廖述權,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	2009[民98]
面頁冊數:	176面圖、表 : 30公分;
標題:	二氧化矽
標題:	Sol-Gel processing
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/19356276407574188733
附註:	指導教授：蘇進成
附註:	參考書目：面
摘要註:	本研究主要利用微分掃描熱卡計 (DSC)、偏光顯微鏡 (POM)、傅立葉紅外線光譜儀 (FT-IR)、穿透式電子顯微鏡 (TEM)、化學分析電子光譜儀 (ESCA)與廣角X-光繞射儀 (WAXD)來探討以溶膠－凝膠法製備聚乳酸/二氧化矽與聚乳酸/二氧化鈦奈米複合材料之熱行為與型態等特性。經由DSC分析結果此兩系統皆具有使結晶速率上升之趨勢，顯示二氧化矽與二氧化鈦的加入可形成晶核，改善聚乳酸結晶性質。研究中以TEM觀察無機粒子於混成材料中分布情形。偏光顯微鏡 (POM)觀察聚乳酸/二氧化矽與聚乳酸/二氧化鈦球晶型態，兩系統球晶成長速率也具有明顯之提升，於聚乳酸/二氧化鈦混成材料中，更可觀察到球晶呈現原PLLA不具有的消光環 (ring-band)型態，顯示TiO2與PLLA產生一特殊作用力，造成球晶型態改變。傅立業紅外線光譜 (FT-IR)進行分析，結果顯示聚乳酸/二氧化鈦混成材料中產生新官能基Ti-O-C吸收峰，此作用力與混成材料中之聚乳酸與二氧化鈦之相對組成量有關。由化學分析電子光譜儀 (ESCA)進一步驗證此作用力化學鍵結之變化，證實造成此作用力發生之反應機制為交酯化反應。研究中輔以廣角X-光繞射儀 (WAXD)證實混成材料因交酯化反應使原聚乳酸分子鏈斷鏈，改變結晶方式，其結晶吸收峰減弱且部分結晶吸收峰被破壞。 Characterization of the poly(l-lactic acid)/silica and poly(l-lactic acid)/titania nanocomposites by using the sol-gel processing was investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), electron spectroscopy for chemical analysis (ESCA) and wide-angle x-ray diffraction (WAXD). The result of DSC analysis confirmed that the crystallization rate increased by adding silica and titanium oxide which can form nuclei to improve the PLA crystallization. Inorganic particle distribution of composites was observed by TEM. Spherulites of Poly(l-lactic acid)/silica and poly(l-lactic acid)/titania were observed by POM, and the growth rate of spherulite is also significantly upgraded in the two systems. In particular, the ring-band in which the original PLLA spherulite does not exist, could be observed in the poly(l-lactic acid)/titanium oxide composites. As a result, titanium oxide and PLLA have a special interaction force, resulting in changes in spherulite patterns. The FTIR analysis showed that poly(l-lactic acid)/titanium oxide composites generate new functional groups in the Ti-O-C absorption peak, resulting from the interaction force between polylactic acid and titanium oxide. ESCA further verifies the binding force of the changes in chemical bonds as a result of the occurrence of the reaction mechanism for the transesterification. In addition, WAXD showed that the chemical interaction which resulted the diffraction of PLLA crystallization decreased due to the transesterification between PLLA and titanium complexes.

溶膠－凝膠法製備聚乳酸/金屬氧化物奈米複合材料之特性研究 = Preparation and Characterization of the Poly(l-lactic acid)/Metallic Oxide Nanocomposites by the Sol-gel Processing
廖, 述權

溶膠－凝膠法製備聚乳酸/金屬氧化物奈米複合材料之特性研究 = Preparation and Characterization of the Poly(l-lactic acid)/Metallic Oxide Nanocomposites by the Sol-gel Processing / 廖述權撰 - [高雄市] : 撰者, 2009[民98]. - 176面 ; 圖、表 ; 30公分.
指導教授：蘇進成參考書目：面.
二氧化矽Sol-Gel processing

溶膠－凝膠法製備聚乳酸/金屬氧化物奈米複合材料之特性研究 = Preparation and Characterization of the Poly(l-lactic acid)/Metallic Oxide Nanocomposites by the Sol-gel Processing
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