IRIDESCENT PHENOMENA AND POLYMERIZATION BEHAVIORS OF AMPHIPHILIC MONOMERS IN LAMELLAR LIQUID-CRYSTALLINE PHASE
IRIDESCENT PHENOMENA AND POLYMERIZATION BEHAVIORS OF AMPHIPHILIC MONOMERS IN LAMELLAR LIQUID-CRYSTALLINE PHASE
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DOI：
10.1021/j100173a066
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发表时间：
1991-10-03
影响因子：
--
通讯作者：
TSUJII, K
中科院分区：
文献类型：
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作者：
NAITOH, K;ISHII, Y;TSUJII, K
已发现两亲性单体衣康酸正十二烷基甘油酯 (DGI) 在稀溶液（1-2 wt%）中，在少量离子表面活性杂质存在的情况下显示出彩虹色。 光反射光谱测量结果表明虹彩溶液由具有亚微米间距的层状液晶相组成。 该溶液的结构与迄今为止已知的其他虹彩表面活性剂溶液的结构相同。 彩虹色是由双层膜的周期性结构反射的光的干涉产生的。 通过使用 H2O2 作为光聚合引发剂，DGI 分子可以在平面双层膜内聚合。 通过这种聚合反应，溶液的层状结构本身保持不变。 然而，彩虹色在聚合过程中显示出显着的红移。 这种红移现象被解释为表明在聚合过程中双层膜之间的间距变大，因为聚合DGI分子的占据面积比单体分子的占据面积小，因此双层膜的面积因聚合而减小。 DGI 与丙烯酰胺和亚甲基双（丙烯酰胺）的共聚也已完成，以将虹彩结构固定在水凝胶内。
The amphiphilic monomer n-dodecyl glyceryl itaconate (DGI) has been found to show iridescent color in dilute (1-2 wt %) aqueous solutions in the presence of a small amount of ionic surface active impurities. The results of reflection spectrum measurement of light indicate that the iridescent solutions consist of lamellar liquid crystalline phases having submicrometer spacing distances. This structure of the solutions is the same as those of other iridescent surfactant solutions known so far. The iridescent color results from the interference of light reflected from the periodic structure of bilayer membranes. The DGI molecules can be polymerized inside the planar bilayer membranes by using H2O2 as an initiator of photopolymerization. The lamellar structure itself of the solutions has been kept unchanged by this polymerization. The iridescent color, however, shows the remarkable red shift during the polymerization processes. This red-shift phenomenon is interpreted as showing that the spacing distance between bilayer membranes becomes larger in polymerization processes, since the area of bilayer membranes is reduced by polymerization owing to the smaller occupied area of polymerized DGI molecules than of monomeric ones. Copolymerization of DGI with acrylamide and methylenebis(acrylamide) has been also done to immobilize the iridescent structure inside the hydrogels.