銀錯合物凝膠之製備與性質

STUDIES ON THE PREPARATION AND PROPERTIES OF THE SILVER COMPLEX HYDROGELS

黃昱誠(Yu-Chen Huang)

指導教授 ： 李文福

大同大學/工程學院/化學工程學系所/碩士(2006年)

摘要

摘要
一系列具奈米銀粒子之抗菌型高吸水性凝膠，藉由丙烯酸鈉(SA)、1-vinyl-2-pyrrolidinone含銀離子之錯合物(VP-Ag＋)與N, N’- methylene-bis-acrylamide (NMBA)所製備，採用的聚合方法為逆向懸浮聚合法。凝膠中的奈米銀粒子由維他命C所還原，採用的方法是用in situ 還原法。討論高吸水性凝膠中之錯合物濃度於對吸水性、膨潤行為與白色念珠球菌抗菌效果之影響。結果顯示，SA-co-VP (SV) 凝膠在去離子水中吸水力約1000 (g H2O/g gel)；而在SV-Ag系列之凝膠中，當增加凝膠中的奈米銀粒子時，吸水力則下降。另外在抗菌方面結果顯示，增加凝膠中的銀濃度(1~10 ppm)則抗菌效果越好。
在N-isopropylacrylamide (NIPAAm), 1-vinyl-2-pyrrolidone/ silver ion 錯合物 (VP-Ag+) 與 N, N’-methylene-bis-acrylamide (NMBA) 自由基反應聚合中，於實際的時間下檢測光學穿透度。探討在成膠聚合反應過程中，vinyl pyrrolidinone-silver 錯合物的濃度與聚合的溫度對於光學穿透度與成膠時間的影響。結果顯示在聚合過程中，當提高錯合物濃度或聚合溫度時，成膠時間則會縮短。當提高錯合物濃度或聚合溫度時，膠體活化能則會降低。在膠體中增加銀濃度時，則膨潤度會降低。在本文中，膠體的型態被檢測於SEM。

關鍵字

銀錯合物

並列摘要

ABSTRACT
A series of antibacterial superabsorbents containing silver nanoparticles based on sodium acrylate (SA), 1-vinyl-2-pyrrolidinone-silver ion complex (VP-Ag＋) and N, N’- methylene-bis-acrylamide (NMBA) were prepared by inverse suspension polymerization. The silver nanoparticles in the gels were reduced to use ascorbic acid (vitamin C) as reductant through in situ reduction method. The influence of the concentration of (VP-Ag＋) complex in the superabsorbents on the water absorbency, swelling behavior, and antibacterial effect of Candida albicans was investigated. Results showed that the water absorbency for sodium acrylate and VP copolymeric gel (SV gel) in deionized water was 1,016 g H2O/g gel, but the water absorbency for SV-Ag series gel decreased when the silver nanoparticle was added. Results also showed that the antibacterial effect of the superabsorbents increased with an increase of the silver concentration (1~10 ppm).
Opitcal transmittance was monitored in real time during the free radical crosslinking polymerization of N-isopropylacrylamide (NIPAAm), 1-vinyl-2-pyrrolidone/ silver ion complex (VP-Ag+) and N, N’-methylene-bis-acrylamide (NMBA). The effect of the concentration of vinyl pyrrolidinone-silver complex and polymerization temperature on the optical transmittance and gelation time for the gel polymerization was investigated. Results showed that the gelation time decreased as the complex concentration or polymerization temperature increased during polymerization. The gelation activation energy in the gel polymerization decreased as the complex concentration or polymerization temperature increased. The swelling ratios of the present gels decreased with the increase of the silver ion concentration in the copolymeric gels. SEM morphologies of the copolymeric gels were examined in this article.

並列關鍵字

complex ； gel

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