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標題: | 靜電紡絲製備聚乳酸纖維與聚乳酸/聚乙二醇混摻纖維其纖維結構之研究 Preparation and Morphological Study of Electrospun PLA Fiber and PLA/PEG Hybrid Fiber |
作者: | Che-Kuan Lin 林哲寬 |
指導教授: | 廖文彬(Wen-Bin Liau) |
關鍵字: | 聚乳酸,靜電紡絲纖維,纖維結構, PLA,electrospinning fiber,fiber morphology, |
出版年 : | 2015 |
學位: | 碩士 |
摘要: | 本研究以靜電紡絲技術製作聚乳酸纖維,探討電紡絲操作環境的相對濕度、電紡絲溶液的濃度、混摻不同種類的高分子對聚乳酸纖維表面及內部結構的影響,並探討聚乳酸纖維表面及內部的顯微結構其形成機制,希望可以建立一個初步控制聚乳酸纖維結構的標準。 研究結果顯示,在固定環境溫度以及電紡絲溶液濃度下,改變電紡絲操作環境的相對濕度,從低相對濕度到高相對濕度,纖維表面平均的孔洞密度、表面孔洞平均半徑大小、纖維平均直徑均會提升,而纖維表面皮層平均厚度則無明顯變化,纖維內部結構由低相對濕度到高相對濕度會從固-液相分離的顆粒狀結構走向液-液相分離的結構。在固定電紡絲操作環境的溫度與相對濕度下,改變電紡絲溶液的濃度,從濃度低到濃度高,纖維表面的孔洞密度和表面孔洞平均直徑大小會降低,但纖維皮層厚度和纖維平均直徑則會升高,纖維內部結構會從液-液相分離的結構走向固-液相分離的顆粒狀結構。固定電紡絲操作環境相對濕度、電紡絲溶液濃度以及溫度下,混摻少量的PEG,PEG混摻比例由低至高,纖維表面的平均孔洞密度、纖維表層皮層厚度和纖維平均直徑大小均會降低,而纖維表面平均孔洞直徑大小則會增加,而從纖維截面的實驗結果可發現,PEG混摻的比例越高,其內部結構會越走向液-液相分離的結構。 We successfully fabricated the PLA fiber by electrospinning. Investigating the influence of environmental relative humidity, solution concentration and blending other kind of polymer on the surface morphology and interior structure of the PLA fiber, we hoped that we could figure out the formation mechanism of the PLA fiber. According to our experimental results, we found that the average surface pore density, average surface pore diameter, and average fiber diameter increased when relative humidity increased under constant temperature and polymer solution concentration. Besides, the average thickness of the skin do not change apparently when relative humidity increased. The fiber interior structure changed from the structure of solid-liquid phase separation to the structure of liquid-liquid phase separation when relative humidity increased. We also found that the average surface pore density and average surface pore diameter decreased, but the average thickness of the skin and average fiber diameter increased when the polymer solution concentration increased under constant temperature and relative humidity. The fiber interior structure changed from the structure of liquid-liquid phase separation to the structure of solid-liquid phase separation when the polymer solution concentration increased. Futhermore, we knew that the average surface pore density, average fiber diameter, and the thickness of the skin decreased, but average surface pore diameter increased when the blending ratio of PEG increased under constant temperature, polymer solution concentration and relative humidity. The fiber interior structure goes to the structure of liquid-liquid phase separation when the blending ratio of PEG increased. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/52166 |
全文授權: | 有償授權 |
顯示於系所單位: | 材料科學與工程學系 |
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