有機無機改質劑對甲基丙醯酸羥乙酯水凝膠之含水性質影響

Effect of organic and inorganic modifiers on the water retention properties of poly(2-hydroxyethyl methacrylate)

鄭榮璽(Lung-Hsi Cheng)

指導教授 ： 洪信國

元智大學/工程學院/化學工程與材料科學學系/碩士(2009年)

摘要

本研究主要探討有機、無機改質劑成分對水凝膠之含水率、鍵結水、環境保濕度、機械性質的交互影響。以保濕結果，計算各膜材的擴散係數，膜材由示差掃描熱分析，計算出膜材內鍵結水所佔的比例，結果顯示配置之改質劑與單體成份相容性良好，藉由紫外光硬化反應於短時間即可成膜，膜材含水率因親水基濃度影響，受交聯劑增加而降低，機械性質之拉伸應變受起始劑增加而降低，配方添加改質劑可降低含水率，與提升膜材之保濕度，配方之鍵結水含量隨著配方之保濕度增加，但鍵結水含量達到70 %以上，增加趨勢即不顯著，膜材之水擴散係數約在1.5×10-12 m2/s上下，潮濕環境下與乾燥環境下有明顯差異，並隨鍵結水含量提升而降低，故配方之保濕度、鍵結水含量、及擴散係數三者相關。

關鍵字

水凝膠 ； 鍵結水 ； 含水率 ； 擴散係數 ； 保濕度

並列摘要

The effects of organic and inorganic modifiers on the interactions of water content, bounded water content, water retention, and mechanical properties of poly(2-hydroxyethyl methacrylate) hydrogel are studied using differential scanning calorimetry (DSC), Fourier transformed infrared spectroscopy, water evaporation measurement, and Instron mechanical tester. The innovative organic modifiers synthesized are compatible with modified hydrophilic siloxane and curable rapidly through radical polymerization. The water content and water retention are affected by hydrophilic and crosslinker contents in the formulation. The use of organic modifier can improve the water retention but decrease the water content of the cured film. The results of DSC indicate that the percentage of the bounded water in the specimen increases with the content of organic or inorganic modifiers. The water diffusion coefficients of formulate specimens are in the order of 10-12 m2/s. The addition of a small amount of organic modifiers would significantly decrease the diffusion coefficient of the hydrogel.

並列關鍵字

poly(2-hydroxyethyl methacrylate) ； hydrogel ； water retention ； bounded water ； diffusion coefficient

參考文獻

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