臺灣博碩士論文加值系統

本研究主要是利用 N-isopropylacrylamide(NIPAAm) 和陽離子單體
trimethylacrylamidopropyl ammonium iodide(TMAAI), trimethyl
methacryloyloxyethylammonium iodide(TMMAI),3-methyl-1-
vinylimidazolium iodide(MVI) 進行交聯聚合反應而得一熱感應性膠體.
利用 NIPAAm 和 TMAAI, TMMAI, MVI 之不同的組成來探討溫度及在鹽類
水溶液中對膠體膨潤度之影響. 結果顯示加入陽離子單體愈多其膨潤度
愈大,而且膠體相轉移溫度也愈高. 在鹽類水溶液中,純 NIPAAm 膠體之膨
潤度在鹽類溶液中無明顯之變化,直到其鹽類水溶液濃度大於 0.1M 時才
有明顯下降. 另外,對於添加陽離子單體之膠體而言,膠體膨潤度會隨鹽類
溶液濃度的增加而減少. 在眾多的鹽類水溶液中,發現在相同陰離子不同
陽離子及相同陽離子不同陰離子下對膠體而言,其陰離子的效應大於陽離
子效應. 最後,我們也針對此膠體之可逆性做測試,膠體收縮與再膨潤會
受其周圍環境之溫 度影響甚大.周圍環境溫度在其膠體轉移溫度之上
下,所呈現之膠體收縮,再膨潤之行為大不相同,添加少量陽離子單體之膠
體具有較好的溫度可逆性.

A series of N-isopropylacrylamide/trimethyl acrylamidopropyle
ammonium iodide(NIPAAm/TMAAI),N-isopropylacrylamide/trimethyl
methacryloyloxyethyl ammonium iodide(NIPAAm/TMMAI),and N-
isopropylacrylamide/3-methyl-1-vinyl--imidazolium iodide(NIPAAm/
MVI) copolymeric gels areprepared from the various molar ratios
of NIPAAm, cationic monomer TMAAI,TMMAI,and MVI, and N,N''-
methylene bisacrylamide(NMBA)in this article. The influences of
the amount of the cationic monomers in the copolymeric gels on
the swelling behaviors in water,various saline solutions,and
various temperatures areinvestigated. Results show that tha
swelling ratios of copolymeric gels are significantly larger
than pure NIPAAm gel,and the more the monomer content,the
higherthe gel transition temperature. In the saline solution,
results show that the swelling ratio of pure NIPAAm gel has not
significantly changed withan increase of the salt concentration
until the salt concentration is larger than 0.1M. The swelling
ratios for the copolymeric gels are decreasedwith increasing of
the salt concentration. In various saline solution,results show
that the anionic effects are greater than cationic effectsin the
presence of common anion,different cations and common cation,
different anions for these hydrogels. Finally, we also test the
reversibility of the NIPAAm/TMMAI copolymericgels. The
deswelling and reswelling kinetics are depended on the
temperature which is below or above the gel transition
temperature. The gel with little TMMAI content has a good
reversibity.