新穎性生質系彈性體之靜電紡絲奈米纖維形態與智慧型過濾膜研究

本篇文章，將新穎性生質系高分子之彈性體材料，利用靜電紡絲技術，製備成智慧型奈米纖維過濾膜。一般市售過濾材纖維直徑較粗及分佈不均勻，且回收性較低。此生質系高分子材料，部分單體來自天然植物，可減少石油能源耗損,其質地柔軟兼具彈性，利用靜電紡絲技術，藉由調控不同的操作參數，以及溶劑DMF/CHCl3比例、溶液濃度、加熱溫度，厚度控制，製得多樣化形態與纖維細度範圍400~2000nm的奈米纖維過濾膜，探討不同纖維直徑以及型態,對過濾測試比較以及解決上述問題。在本研究中，調配不同溶劑比例使纖維直徑低於500nm時，由於比表面積非常高且纖維細度極低，有效阻擋住大部分的懸浮顆粒，經SPMS過濾系統測試，微粒平均穿透率在30%左右。而經加熱處理後，當溫度增加60℃與加熱時間增長90分鐘後，推測因到達材料本身Tm點，纖維表面會有熔融現象,纖維直徑變粗微粒不易穿透，平均穿透率隨之由30%下降到4%左右。並且調控不同濾材厚度(0.005mm與0.02mm)進行過濾比較，發現當纖維過濾膜溶劑濃度較低以及厚度較厚時,因纖維直徑較細並且有液珠形態存在，使得整體孔隙變小，有效阻擋微粒，使平均穿透率可降低至0.8%，壓降方面也降低許多，因此過濾品質則有較大提升，致其可當做一高效能具彈性的綠色環保之智慧溫感過濾材。在未來將可應用於綠色環保型之高效能奈米纖維過濾膜、空氣清淨機、汙水處理器，日常衣服、或口罩應用上，並且與其他廠商合作，創造此綠色材料最大的經濟效益。

關鍵字

靜電紡絲；奈米纖維；聚酯高分子；過濾膜；生物可分解

並列摘要

In this study, the high-performance of nonwoven-nanofiber filters of renewably sourced bio-based polyester polymer were successfully fabricated by electrospinning (ES) technique. In general, the dimension of commercial nonwoven filters is thick, uneven distribution, and less recovery. The texture of bio-based polymers made from raw plant material is soft and elastic. Over 75% of this polyester was renewably sourced. It was observed that the variation of morphologies on different operated conditions from SEM, by tuning the operated parameters of ES process and different ratio of DMF/CHCl3 solvent. We could produce various kinds of ES nanofibers with uniform fiber diameter ranging from 400 to 2000 nm, which result in enhancing the filter efficiency and overcoming the past defects in the filter application. The SPMS filtration system tested through the nanofiber filters by sodium chloride (NaCl) aerosol particles ranged from 30 to 300nm. These nanofiber filters with the diameter below 500nm could effectively resist the majority of suspended particles due to their high specific surface area/volume ratio and the lower fiber diameter. On the other hand, the average penetration decreased from 30% to 4% with increasing heating temperature and annealing time. In addition, the ES fibers with bead-form morphology with thicker in thickness have the average penetration below 0.8% and lower pressure drop, which enhanced the filter quality of factor and single fiber efficiency. Hence, we successfully prepared the thermo-sensitive, flexible and high performance of novel filtration from green polymers, which could be applied in the industrial application.

並列關鍵字

electrospinning ； nanofiber ； polyester ； filter

參考文獻

1. Yin, G.B., et al., The Electrospun Polyamide 6 Nanofiber Membranes Used as High Efficiency Filter Materials: Filtration Potential, Thermal Treatment, and Their Continuous Production. Journal of Applied Polymer Science, 2013. 128(2): p. 1061-1069.

2. Chiu, Y.-C., et al., Synthesis, Morphology, and Sensory Applications of Multifunctional Rod–Coil–Coil Triblock Copolymers and Their Electrospun Nanofibers. ACS Applied Materials & Interfaces, 2012. 4(7): p. 3387-3395.

3. Thorvaldsson, A., et al., Development of Nanofiber-Reinforced Hydrogel Scaffolds for Nucleus Pulposus Regeneration by a Combination of Electrospinning and Spraying Technique. Journal of Applied Polymer Science, 2013. 128(2): p. 1158-1163.

4. Chen, J.-Y., et al., Manipulation on the Morphology and Electrical Properties of Aligned Electrospun Nanofibers of Poly(3-hexylthiophene) for Field-Effect Transistor Applications. Macromolecules, 2011. 44(8): p. 2883-2892.

5. Patel, A.C., et al., In Situ Encapsulation of Horseradish Peroxidase in Electrospun Porous Silica Fibers for Potential Biosensor Applications. Nano Letters, 2006. 6(5): p. 1042-1046.

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新穎性生質系彈性體之靜電紡絲奈米纖維形態與智慧型過濾膜研究

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