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

• Main Authors: Fun-Yu Sn, 蘇芳玉
• Other Authors: Jui-Ming Yeh
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/76309093023726382032

碩士 === 中原大學 === 化學研究所 === 99 === 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.