壓克力/二氧化矽混成材料超疏水電紡絲纖維之製備與性質探討

Preparation, Characterization and Superhydrophobic Properties of Electrospun PMMA-silica Hybrid Sol-gel Fibers

蘇芳玉(Fun-Yu Sn)

指導教授 ： 葉瑞銘

中原大學/理學院/化學研究所/碩士(2011年)

https://doi.org/10.6840/cycu201100976

摘要

本論文主要是利用電紡絲技術製備具超疏水表面之有機無機複合多孔纖維薄膜。 首先，以傳統自由基聚合法合成有機/無機高分子poly(MMA-co-MSMA)做為溶膠凝膠反應的前驅物(precursor)，再導入methyl triethoxysilane (MTEOS)進行酸催化之溶膠-凝膠反應，經水解及縮合反應後產生壓克力-二氧化矽混成材料，利用FTIR與EDS來鑑定複合材料poly(MMA-co-MSMA)/SiO2形成Si-O-Si的化學鍵，確認已成功的製備出poly(MMA-co -MSMA) /SiO2混成材料。 進一步將所合成材料利用電紡絲的方式在適當的電紡絲的參數(紡液濃度、黏度、應用電壓、集板距離與注射速率)下製備出微米級直徑的多孔纖維薄弱。 實驗結果顯示，溶液的黏度範圍介於60 - 80 Cp，針頭內徑0.16 mm，流速為0.02 ml/min，應用電壓為15 KV，針尖離收集板的距離為12公分時具有最佳紡絲效果。 由SEM觀察得到: 經由參數控制，電紡纖維直徑約由最細的 700 nm 到最粗2300 nm。 另外，透過接觸角的量測，本實驗形成的粗糙表面，其最佳水滴接觸角可大於150∘此為一超疏水表面。 因此，可利用電紡絲技術及二氧化矽材質的導入來製備超疏水表面。 在物性量測方面，利用TGA與DSC來量測複合材料的熱性質，顯示導入二氧化矽材質可提高多孔複合薄膜之熱分解溫度。 在介電性質方面，多孔性電紡絲薄膜相較於相同材質之緻密性薄膜，能夠有效的降低膜材介電常數。

關鍵字

混成材料 ； 壓克力/二氧化矽 ； 電紡絲 ； 超疏水

並列摘要

In this study, an electro-spun fiber mats with super-hydrophobic surface was prepared by electro-spinning PMMA-silica hybrid materials have been successfully presented. First of all, sol-gel precursor (i.e., poly(MMA-co-MSMA)) with specific content of MSMA was synthesized through conventional free radical polymerization with benzoyl peroxide (BPO) as initiator, followed by performing the acid-catalyzed sol-gel reaction (i.e., hydrolysis and condensation) reactions of as-prepared copolymer and methyl triethoxysilane (MTEOS). The as-prepared hybrid materials are then characterized by FTIR and EDS. Effect of electro-spinning parameters (such as solution concentration, viscosity, applied voltage, flying distance and feeding rate) on the fiber diameter of electro-spun of hybrid material fiber mat has also been systematically investigated. The result indicated the best processing parameter of electro-spinning with feeding rate of 0.02 ml/min; applied voltage of 15 kV and tip collector distance of 12 cm. Morphology of as-prepared electro-spun hybrid fiber mats was observed by SEM, indicating that the average diameter of fiber can be ranged as low as 700 nm and as high as 2300 nm. It should be noted that the water contact angle (CA) of electro-spun hybrid fiber mats with 10wt% loading of MTEOS was found to reveal water CA higher than 150°, indicating that the super-hydrophobic surface can be fabricated by integrating the electro-spinning technique and incorporation of SiO2 content into polymer matrix. For the physical property studies, thermal stability of electro-spun hybrid materials was found to be higher than that of neat electro-spun PMMA based on the DSC and TGA measurements. The electro-spun hybrid maters were found to show lower dielectric constant as compared to their counterpart, as measuring by dielectric constant analyzer.

並列關鍵字

hybrid ； PMMA-sillica ； superhydrophobicity ； Electro-spinning

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