- 學位論文
具奈米孔洞之PTFE薄膜上PVA塗佈層之撕裂測試與透濕量測
The Peel Test and Water-Vapor Permeability Measurement of A PVA-Coated Film on A Nano-Porous PTFE Membrane
摘要
本研究針對具奈米孔洞之PTFE薄膜上之PVA(聚乙烯醇)塗佈層，或聚乙烯醇/聚乙烯亞胺(PVA/BPEI)混和塗佈層，做180度撕裂測試(Peel Test)，與透濕量測 (Measurement of Water-Vapor Permeability, WVP)。目的為找出最佳PVA配方，以期PTFE膜及PVA膜的複合膜能有最大透濕量與PVA膜的最大黏著力。最佳製膜的條件為，10wt%的PVA/BPEI(2/1) 溶於85℃ 水中，塗佈於PTFE膜上之後，120 ~ 180℃乾燥10min為最佳條件。PVA/BPEI(2/1)混合膜在黏著力以及透濕能力的表現，都比PVA (pure) 製膜佳。在200℃乾燥PVA膜的黏著力，比120℃乾燥的PVA膜來的大，經全反射型-傅立葉轉換-紅外線光譜儀 (Attenuated Total Reflection – Fourier Transform Spectrometers, ATR-FTIR) 的分析，發現在高溫下乾燥時，會游離PVA分子中的羥基基團（-OH），並與碳原子建立新的COC鍵，以改善黏著性。
並列摘要
This study investigated the adhesion force and the water vapor permeability (WVP) of a PVA or PVA/BPEI film coated on a nano-porous PTFE membrane. The preparation formula of PVA was optimized to obtain the best adhesion and the maximal permeability of water vapor between PTFE and PVA films. The PVA/BPEI(2/1)-blended mixture with a concentration of 10wt%, dissolved in 85℃ water, and dried at 120 ~180℃ for 10 min was concluded the optimal condition. Its performance in adhesion force and WVP was better than that of pure PVA film. The experimental results also indicated that the PVA film dried at 200℃ possessed an adhesion force higher than that dried at 120℃. Analyzed by the FTIR-ATR, such a drying at a high temperature could dissociate hydroxyl group (-OH) in the PVA molecules and build new C-O-C bonds with carbon atoms to improve the adhesive property.