薄膜科技應用層面相當廣泛,在民生需求上扮演極重要的角色,近數十年來發展後,已經被廣泛運用在化學、環保、能源、醫藥、食品以及電子等等工業上,現今的薄膜因膜技術的發展,使得膜具備微孔洞,可通稱為微孔膜。透過微孔膜將微粒分離,達到淨化、純化等工藝,將可以解決現代高科技所產生的廢溶液及工業廢水,將對地球的汙染及傷害減輕,增進綠能產業。 本論文利用聚丙烯材料探討押出成型製程條件,滾輪溫度(20℃、70℃)、模頭距離(0cm、5cm、10cm)、引取速度(80cm/min、100cm/min、120cm/min)。押出膜後使用差示掃描熱分析儀(DSC)、X光繞射儀(XRD)來探討微孔膜的材料性質的實驗結果,找尋出最佳造孔的微孔膜製程參數,進一步探討延伸至成參數,熱延伸速度(10 mm/min、50 mm/min、100 mm/min、200 mm/min、500mm/min)及熱延伸倍率(50%、100%、150%)。延伸製程中,利用場發式掃描電子顯微鏡(FESEM)、影像分析(Simple PCI),探討微孔膜的孔洞均勻性、孔徑分布及孔隙率;第三部分,作添加材料的比較,將PEO及NaCl分別以重量百分比5%加入PP裡,並使用熱重分析儀(TGA)及差示掃描熱分析儀(DSC)來討論混料對材料性質以及結晶程度的變化程度,延伸完後也利用場發式掃描電子顯微鏡(FESEM)來看觀察孔洞圖。
In recent years, membrane technology has being more extensive, and play an important role in the world. Using widely on chemical, environmental, energy, medical, food and also in electrical. This study were prepared to develop microporous membranes through melt extrusion followed by stretching. First, using different parameters such as roll temperature (20℃、70℃)、Die Distance (0cm、5cm、10cm)、Draw speed(80cm/min、100cm/min、120cm/min). The role of high molecular weightchains on the row-nucleated lamellar crystallization was investigated. The orientation of crystalline and amorphous phases was measured by X-Ray Diffractometer (XRD), crystallinity was measured by differential scanning calorimetry (DSC). Second, using the best parameter to develop the effect of second hot stretching, such as hot stretching speed (10 mm/min、50 mm/min、100 mm/min、200 mm/min、500mm/min) and hot stretching ratio (50%、100%、150%). Final, pick the best stretching parameter to develop different addition material. Compounded PP with water-soluble material, PEO and NaCl, each about 5%. The observations of SEM surface images and porosity of the membranes showed higher pore density, uniform pore size, and superior perme-ability for the ones obtained from the precursor films prepared under controlled parameters during extrusion and stretching stage.