Encapsulation of methyl red pH-indicator into a sol-gel matrix

被引:15
作者
Zaggout, FR
El-Nahhal, IM
Zourab, SM
El-Ashgar, NM
El-Dawahedy, N
Motaweh, H
机构
[1] Al Azhar Univ, Dept Chem, Gaza, Israel
[2] Islam Univ Gaza, Dept Chem, Gaza, Israel
关键词
methyl red pH indicator; sol-gel encapsulation; immobilization of indicators; polysiloxanes;
D O I
10.1081/DIS-200057678
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Encapsulation of methyl red pH indicator into transparent monolithic silica matrices was made via the acid-catalyzed sol-gel reaction of tetraethylorthosilicate and methyl red indicator. The immobilized methyl red shows behavior similar to its solution counterpart. It retains its structure during the sol-gel reactions in terms of response to pH. Polarized light microscopy and the surface morphology indicated that methyl red molecules are strongly interacted within the host silica network.
引用
收藏
页码:629 / 633
页数:5
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