聚(羥基丁酸酯-共-羥基己酸酯)之纖維膜製備與性質分析

Fabrication and Characterization of Poly(hydroxybutyrate-co-hydroxyhexanoate) Membranes via Electrospinning Process

林志忠(Chih-Chung Lin)

指導教授 ： 孫一明

元智大學/工程學院/化學工程與材料科學學系/碩士(2006年)

摘要

本研究是利用電紡絲法(electrospinning)製備聚(羥基丁酸酯-共-羥基己酸酯) (PHBHx)之纖維，並探討纖維膜之結晶型態。
經由調整溶液組成和操作參數，製備出平滑、直徑小的纖維。當高分子溶液濃度為3 wt%，共溶劑為CHCl3/DMF時，隨著加入的DMF含量增加，造成高分子溶液的導電度增加，使得原本的珠狀纖維漸漸轉變為平滑，且纖維直徑往下降(PHBHx3.9: 650~460 nm ; PHBHx8.3: 1000~430 nm)。溶液流量的減小有助於平滑纖維的形成；環境溫度的上升則是會造成纖維直徑變大(PHBHx3.9: 460~610 nm ; PHBHx8.3: 430~910 nm)；PHBHx3.9和PHBHx8.3都會隨著電壓的增高，纖維直徑往下降(PHBHx3.9: 610~340 ; PHBHx8.3: 530~430 nm)。
本研究還利用熱式差分析儀(DSC)和廣角度X光繞射(WAXD)，分析所製備出之纖維膜的結晶型態，並與溶鑄膜(cast membrane)做比較。 發現，纖維膜的結晶度都比溶鑄膜來的低，且由於纖維膜的尺寸較小，會限制結晶的生成。 而纖維膜經過退火處理之後，結晶峰和結晶度都會成長，表示纖維膜尺寸雖小，卻還是有空間能供結晶生長。

關鍵字

聚(羥基丁酸酯-共-羥基己酸酯) ； 電紡絲

並列摘要

Biodegradable poly(hydroxybutyrate-co-hydroxyhexanoate) (PHBHx) fibers were continuously electrospun from PHBHx solution in chloroform (CHCl3)/dimethylformamide (DMF). The mixed solvents can overcome the problem of blocking at the spinneret. Increasing the solution conductivity could reduce the formation of beads in fibers and decrease fiber diameters(PHBHx3.9: 650~460 nm ; PHBHx8.3: 1000~430 nm). The fiber diameters of PHBHx3.9 and PHBHx8.3 decreased by increasing the applied voltage from 9 to 21 kV (PHBHx3.9: 610~340 ; PHBHx8.3: 530~430 nm). Fiber diameters increased with temperature (PHBHx3.9: 460~610 nm ; PHBHx8.3: 430~910 nm) and decreased with low feedrate. The DSC and WAXD analysis showed that the crystallinity and the area of crystalline peaks of the electrospun membranes were smaller than those of the cast membranes. Although the size effect of electrospun fibers would restrain the growth of crystalite, annealing at 75 oC would increase the crystallinity and the area of crystalline peaks. It indicated that the crystallinity of the electrospun fibers still could be induced.

並列關鍵字

poly(hydroxybutyrate-co-hydroxyhexanoate) ； electrospun

參考文獻

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