键合法制备高亲水性光化学pH传感器敏感膜及性能研究  

Preparation of High Hydrophilic Optical Chemical pH Sensitive Membranes via Covalent Immobilization Method and Its Performance

作　　者：罗发亮[1,2] 陈天禄[2] 

机构地区：[1]宁夏大学宁夏能源化工重点实验室,银川750021 [2]中国科学院长春应用化学研究所,高分子物理与化学国家重点实验室,长春130022

出　　处：《分析化学》2010年第11期1609-1614,共6页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.50273037)资助项目

摘　　要：采用丙烯酰胺为偶合剂,以Fe2+/H2O2为引发剂,将邻甲酚红通过表面接枝聚合固定于交联聚乙烯醇膜表面,制备了一种可用于光化学pH传感器的pH敏感膜。性能测试表明,此膜具有pH响应范围宽(pH7.97～12.26)、响应时间快(<25s)、耐盐性好、可逆重复性及光和贮存稳定性良好,制备方法简单的优点。实验表明,此膜可用于光化学pH传感器。An optical chemical pH sensitive membrane for optical chemical pH sensors has been developed by covalently immobilizing cresol red on optical transparent cross-linked polyvinyl alcohol （ PVA） membrane surfaces by using acrylamide as couple agent and Fe2 ＋ /H2O2 as initiator. The performance of the pH sensitive membrane was investigated. The results showed that the pH sensitive membrane had some excellent features. Firstly,the sensitive membrane still held two pH response intervals and the two response intervals were expanded from pH 0. 15 1. 18 and pH 7. 33 8. 94 of cresol red solution to 0. 1 5 mol/L [H ＋]and pH = 7. 97 12. 26. Secondly,the optical chemical pH sensitive membrane had rapid response time （ 25 s） , good reproducibility,reversibility,excellent optical and storage stability. Lastly,the typical feature of the optical chemical pH sensitive membrane was easiness of fabrication. All of these show that the pH sensitive membrane is suitable to be used as a sensitive layer for optical pH sensor.

关 键 词：邻甲酚红 光导pH传感器 聚乙烯醇 薄膜 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]