本論文研究方向是以聚己內酯（PCL）及聚丁二酸已二酸丁二醇酯（PBSA）為主要材料，竹子纖維（BF）及聚麩胺酸（PGA）為填充材來製造三種複合材料，分別進行機械性質、熱性質、表面型態、結構分析及生物降解性等特性分別進行檢測，藉此得到具備良好特性之最佳混合比例。本論文共分為三大部分：
第一部份：本研究針對聚己內酯與竹子纖維複合材之機械性質、熱性質及表面型態進行研究。其中接枝馬來酸酐之聚己內酯/竹子纖維複合材具有其較佳之相容性，因此在機械性質上有較顯著之提昇。由於接枝馬來酸酐之聚己內酯上的酸酐基與竹子纖維上的羥基反應而產生支鏈與交聯巨分子結構；並發現竹子纖維在接枝馬來酸酐之聚己內酯基材中的表面型態分析中，有其較佳界面接著性。又在土壤試驗下，發現聚己內酯/竹子纖維複合材之降解性大於接枝馬來酸酐之聚己內酯/竹子纖維複合材，其相差約3-8 wt%左右，差異並不明顯。最後發現聚己內酯/竹子纖維複合材中，在竹子纖維含量為10 wt% 時具有較佳之拉伸強度與加工特性。
第二部份：本研究針對聚丁二酸已二酸丁二醇酯與竹子纖維複合材之結構分析、生物降解性及表面型態進行研究。其中接枝丙烯酸之聚丁二酸已二酸丁二醇酯/竹子纖維複合材，由於接枝丙烯酸之聚丁二酸已二酸丁二醇酯上的羧基與竹子纖維上的羥基反應而產生鍵結作用，其具有較佳之相容性。並發現竹子纖維在接枝丙烯酸之聚丁二酸已二酸丁二醇酯基材中的表面型態分析中，有其較佳界面接著性。在熔融流動試驗中，顯示接枝丙烯酸之聚丁二酸已二酸丁二醇酯/竹子纖維複合材比聚丁二酸已二酸丁二醇酯/竹子纖維複合材扭力低，流動高較易於加工。最後發現在生物Acinetobacter baumannii菌進行生物降解試驗下，發現聚丁二酸已二酸丁二醇酯/竹子纖維複合材表面型態觀測中，可得知在20天後，在薄膜表面上發現有明顯嚴重的龜裂現象，其降解率可達至80 wt%以上。並在降解試驗的物性分析中，發現接枝丙烯酸之聚丁二酸已二酸丁二醇酯/竹子纖維複合材之降解性低於聚丁二酸已二酸丁二醇酯/竹子纖維複合材且具有較低分子量及黏度。
第三部份：生物可降解性聚己內酯/聚麩胺酸複合材經由熔融混煉方式，將聚己內酯及聚麩胺酸製成複合材料。在本研究中所使用之聚麩胺酸是由菌株Bacillus subtilis DYU1所自製培養而成。且在本研究中利用改變不同自製聚麩胺酸比例含量及接枝丙烯酸於聚己內酯上，觀察其聚己內酯/聚麩胺酸複合材料之變化情況。再由上述之不同變數，製成之聚己內酯/聚麩胺酸複合材，再以傳立葉轉換紅外線光譜儀與核磁共振儀分析，測其複合材之結構，並用以熱式插卡掃描儀分析其結晶行為，掃描式電子顯微鏡測量表面型態；最後再以萬能試驗機測其機械性質的變化及生物可分解試驗測得分解速率。由結果發現，接枝丙烯酸之聚己內酯/聚麩胺酸複合材較聚己內酯/聚麩胺酸複合材抗張強度高，流動高較易於加工。且在含水與含浸生物可分解試驗中，發現聚己內酯/聚麩胺酸複合材之含水及降解性大於接枝丙烯酸之聚己內酯/聚麩胺酸複合材，其相差分別約2-6 wt %與2-10 wt %左右，差異並不明顯。

In this study, bamboo fiber (BF) and poly(glutamic acid) (PGA) were blended with polycaprolactone (PCL) or poly(butylene succinate adipate) (PBSA) to measure the mechanical, thermal, morphological, structure, and biodegradability properties,and then the best blending ratio wewe found. The presented work was divided into three parts:
In the first part, the mechanical, thermal, and morphological properties of polycaprolactone (PCL) and bamboo fiber (BF) composites were evaluated. Composites containing maleic anhydride-grafted PCL (PCL-g-MA/BF) exhibited noticeably improved mechanical properties due to better compatibility between the two components. The dispersion of BF in the PCL-g-MA matrix was significantly more homogeneous due to the creation of branched and cross-linked macromolecules via reactions between carboxyl groups in PCL-g-MA and hydroxyl groups in BF. In a soil environment, the PCL/BF composite has a higher value of biodegradation (about 3-8 wt%) than the PCL-g-MA/BF one. Finally, the tensile strength and elongation at break of PCL-g-MA/BF were nearly constant up to 10 wt% BF and exhibited properties conducive to easy processing.
In the second part, the structure, biodegradability, and morphological properties of composite materials composed of poly(butylene succinate adipate) (PBSA) and bamboo fiber (BF) were evaluated. Composites containing acrylic acid-grafted PBSA (PBSA-g-AA/BF) exhibited noticeably enhanced compatibility due to the ester formation between the carboxyl groups of PBSA-g-AA and hydroxyl groups in BF. In addition, the PBSA-g-AA/BF composite was more easily processed due to a lower melt viscosity. Each composite was subjected to biodegradation tests in an Acinetobacter baumannii compost. Morphological observations indicated severe disruption of film structure after 20 days of incubation, and both the PBSA and the PBSA-g-AA/BF composite films were degraded more than 80 wt%. The PBSA-g-AA/BF films were more biodegradable than those made of PBSA and exhibited a lower molecular weight and intrinsic viscosity.
In the last part, Biodegradable polycaprolactone/poly(glutamic acid) (PCL/PGA) were blended by a melt blending method. Additionally, acrylic acid-grafted polycaprolactone (PCL-g-AA) was studied as an alternative to PCL. Bacillus subtilis DYU1 (GenBank nucleotide sequence accession number is EF442670) was chosen for further study. The composites were characterized chemically using Fourier-transform infrared spectrometry (FTIR), nuclear magnetic resonance (NMR), and differential scanning calorimetry (DSC), and morphologically using scanning electron microscopy (SEM). Finally, the samples were measured mechanical properties by instron mechanical tester and biodegradation by soil test. Because of poor compatibility between PCL and PGA, the tensile strength of PCL-g-AA/PGA was higher than PCL/PGA, and easy processing for lower viscosity. In the water and soil environment test, the PCL-g-AA/PGA had higher values of water absorption and biodegradation (2-6 wt% and 2-10 wt%) than PCL/PGA

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