半互穿型網狀結構體的聚N-異丙基丙烯醯胺/聚丙烯酸鈉吸濕材之製備及性質研究

Preparation and Characterization of Sodium Polyacrylate Semi-IPN Poly(N-isopropylacrylamide) Adsorbent

吳宏毅(Horng-Yih Wu)

指導教授 ： 許克瀛

中原大學/工學院/化學工程研究所/碩士(2006年)

https://doi.org/10.6840/cycu200600550

摘要

摘 要

本研究利用自由基聚合法製備親水性聚N-異丙基丙烯醯胺和半互穿型網狀結構體(semi IPN)的N-異丙基丙烯醯胺/丙烯酸鈉聚合物，此種聚合物具有溫度和酸鹼敏感性質。經由實驗，尋求以N-異丙基丙烯醯胺為單體、APS為起始劑、BIS為交聯劑及TEMED為催化劑，摻合的聚丙烯酸鈉為一線性聚合體，使N-異丙基丙烯醯胺聚合過程中，聚丙烯酸鈉均勻的存在水相中與N-異丙基丙烯醯胺形成半互穿型網狀結構，經由聚丙烯酸鈉及交聯劑用量的改變，溶劑酸鹼值及溫度的改變，探討聚合反應條件對吸水性質的影響，並經由吸水率、吸濕實驗及DSC測試來鑑定此水膠的吸水、吸濕性質及其溫度與酸鹼值敏感度。
實驗結果得知，在溫度敏感性質方面，此semi-IPN水膠在水溶液中隨著溫度上升，於到達臨界溫度時會產生一不連續的體積變化，以DSC量測得此溫度約在33.6℃左右。在酸鹼敏感性質方面，水膠在酸性條件下呈現疏水性質，在鹼性條件下呈現親水性質，在吸水率方面，隨著交聯劑含量增加，吸水率下降，聚丙烯酸鈉含量增加，吸水率上升；在除濕的應用方面，聚丙烯酸鈉的含量愈高，水膠吸濕量也隨之上升，且50℃下再生1~1.5小時，即可達到良好的再生效果。

關鍵字

丙烯酸鈉 ； 吸濕材料 ； N-異丙基丙烯醯胺 ； 臨界溫度（LCST） ； 半互穿型網狀結構體

並列摘要

Abstract

In this study, N-isopropylacrylamide and N-isopropylacrylamide / Sodium Polyacrylate were polymerized into semi-Interpenetrating Polymer Network(semi-IPN) by using free radical polymerization. The polymer possesses thermo-sensitive and pH induced properties. From the experimental runs, a polymerization system an condition so that the Sodium Polyacrylate can be well mixed in the polymerization system was found. Effects of the amount of Sodium Polyacrylate and closslink、 pH values and temperature of the solution, There polymers were characterized for their temperature-sensitive and pH-responsive behavior by swelling and adsorbent experiment, and differential scanning calorimetry.
The swelling ratio of the semi-IPN polymer as function of temperature and pH value. A transition temperature of approximately 33.6℃ is obtained. Under the pH value of solution is up to 7 or more, the polymer is more hydrophile. At low pH value, the polymer is more hydrophobic. The equilibrium swelling ratio decrease as the BIS content increase. The adsorbed amount of semi-IPN polymer in the adsorption-dehumidification systems was increased as Sodium Polyacrylate content increased. And heated 1~1.5 hours under 50℃ can reach a good efficacy of regeneration.

並列關鍵字

Lower c ； Semi-Interpenetrating Polymer Network

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