- 學位論文
連續式高孔隙率聚丙烯微孔膜之製備與開發
Establishment of High Porosity Micro-Porous Polypropylene Membrane by Using Continuous Stretching Operation
摘要
隨著近來科技的發展，經過不斷開發發展，薄膜科技已被廣泛應用於半導體、機械、民生、光電、能源、環保及生醫等產業，薄膜的製程包含薄膜押出、退火、冷延伸及熱延伸。 本論文利用數顆不同轉速滾輪延伸薄膜，建立連續式薄膜延伸系統。首先將薄膜押出，接著固定退火溫度，以不同的退火時間(15min、30min、60min)，觀察退火時間對於結晶度的影響。第二部分探討不同冷延伸倍率(20%、40%、60%、80%、100%)及不同冷延伸速率(100mm/min、250mm/min、500mm/min、1000mm/min、1500mm/min)對於孔洞的影響。第三部分不同熱延伸倍率(20%、40%、60%、80%)及熱延伸溫度(40℃、60℃、80℃、100℃) 對於孔洞的影響。 研究結果發現退火60min後結晶度增加5.15%；隨著冷延伸倍率的提高孔徑也愈來愈大，倍率100%時，孔徑分佈在10~30nm，平均孔徑為22.12nm；隨著冷延伸速率的增快孔徑也愈來愈大，但空洞的數量卻減少。適當的熱延伸倍率可以增加孔洞孔徑，倍率80%時，孔徑提高了75%，孔隙率提高了4.08%；較高的熱延伸溫度能使孔洞在較低的熱延伸倍率更容易被拉開，使熱延伸倍率不用太大，降低熱延伸時薄膜受力，使薄膜的孔洞更容易被控制，100℃時，孔徑提高165%、孔隙率提高了8.08%。
並列摘要
In recent years, membrane technology has been used widely on semiconductor, people's livelihood, photoelectric, energy, environmental, biomedical, and other industries. The process comprises extrusion, annealing, cold, and hot stretching. The purpose of this study is to establish the micro-porous polypropylene with continuous, high porosity by using stretching operation. First, using different annealing time (15 min, 30 min, and 60 min) was to observe the effect of crystallization. Second, the process continued using different parameters, such as cold-stretching ratio (20%, 40%, 60%, 80%, and 100%), cold-stretching speed (100 mm/min, 250 mm/min, 500 mm/min, 1000 mm/min, and 1500 mm/min). Finally, it used different parameters, such as hot-stretching ratio (20%, 40%, 60%, and 80%) and hot-stretching temperature (40 ℃, 60 ℃, 80 ℃, and 100 ℃). The results show the crystallization increases 5.15% when annealing time is 60 min. The increase in cold-stretching ratio increases the pore size. When the ratio is 100%, the pore size distribution is 10~30 nm and average pore diameter is 22.12 nm. The increase in cold-stretching speed also increases the pore size, but the number of pore decreases. The pore diameter can be increased at the appropriate hot-stretching ratio. When the ratio is 80%, the pore diameter increases 75%, and the porosity increases 4.08%. The pore is easy to extend during the hot stretching with high temperature. That makes the membrane easy to control with small hot-stretching ratio, and the membrane avoids bearing too much force. When the temperature is 80 ℃, the pore diameter increases 165%, and the porosity increases 8.08%.