溶膠-凝膠法製備超疏水環氧樹脂薄膜; Preparation of superhydrophobic epoxy films by sol-gel process

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题名:	溶膠-凝膠法製備超疏水環氧樹脂薄膜;Preparation of superhydrophobic epoxy films by sol-gel process
作者:	武冠宇;Guan-yu Wu
贡献者:	材料科學與工程研究所
关键词:	溶膠-凝膠法;蓮花效應;超疏水;環氧樹脂;sol-gel;epoxy;superhydrophobic;lotus effect
日期:	2009-06-04
上传时间:	2009-09-21 11:29:19 (UTC+8)
出版者:	國立中央大學圖書館
摘要:	本論文主要為製備超疏水之環氧樹脂薄膜。首先在帶有疏水官能基(甲基)之矽氧烷偶合劑MTMOS的溶膠-凝膠反應液中導入環氧樹脂，以製備疏水環氧樹脂薄膜。再藉由導入二氧化矽粉體來增加表面粗糙度，接著添加PET纖維和提高硬化溫度來提升薄膜本身之機械性質以及薄膜與基材之間的接著性。薄膜特性可由接觸角、百格測試、SEM圖、AFM結果分析之。實驗結果顯示，當MTMOS的莫耳分率由0增加至0.4時，接觸角可由77°上升至98°；而附著力測試後的殘留面積皆可維持在100%。接著藉由添加二氧化矽粉體來增加表面粗糙度，進而提升疏水性。當添加量為30wt%時接觸角可從98°上升至149°；但是其薄膜經由附著力測試後的殘留面積只剩下85%。進一步添加PET纖維以提升薄膜與基材之間的接著性。PET纖維添加量僅要0.05wt%以上就可將殘留面積提升至95%；此外由於粗糙度的增加，最大接觸角可達到153°。最後提高硬化溫度進一步改善接著性。將硬化溫度控制在130˚C到160˚C，其薄膜經由附著力測試後的殘留面積可達到100%。此外，將薄膜塗佈至鋁片上進行簡單的腐蝕試驗。結果顯示塗佈薄膜後的鋁片其腐蝕面積明顯縮小，開始產生腐蝕的時間相較裸鋁片而言亦可延長為原來的18倍。 In this study, the superhydrophobic epoxy-based thin film was prepared by mixing epoxy polymer solution and MTMOS solution first, and then the silica powder and PET fibers were added into the mixing solution to increase the roughness and improve the adhesion of the hybrid film, respectively. The characteristic of the film was analyzed by contact angles, adhesion test, SEM images, and AFM results. The experimental result indicated that when the mole fraction of MTMOS increased from 0 to 0.4, the contact angle of the film also increased from 77° to 98°. And no matter the mole fraction of MTMOS was 0 or even 0.4, the remaining area of the films after the adhesion test were all 100%. To increase the surface roughness of the film, the coating solution was prepared by mixing the solution with silica powder. When the ratio of silica powder was 30wt%, the contact angle could be increased from 98° to 149°, but remaining area of the film decreased to 85% in the contrary. Furthermore, to improve the adhesion between the film and substrate, the coating solution was prepared by mixing the above solution with PET fibers. The remaining area after the adhesion test could be promoted to 95% as long as the addition of PET fibers was only 0.05wt%. In addition, the contact angle was also increased to 153° because of the increase of the roughness. In the other hand, the remaining area after the adhesion test could be increased to 100% while the curing temperature was increased to the range of 130˚C and 180˚C. Moreover, the corrosion test result showed that the corrosion area on the aluminum substrate was reduced obviously after coating the superhydrophobic film on it.
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