用热聚法固定指示剂的光纤氧气传感器研究  

Study on New Fiber Optic Oxygen Sensor with Immobilizing the Indicator by Thermo-polymerization Method

作　　者：姜德生[1] 陈兴[1] 黄俊[1] 

机构地区：[1]武汉理工大学光纤传感技术研究中心,武汉430070

出　　处：《化学学报》2003年第8期1281-1286,共6页Acta Chimica Sinica

基　　金：湖北省重大科技攻关项目 (No .2 0 0 1AA1 0 1A0 2 );湖北省自然科学基金项目 (No .2 0 0 1ABB0 74)资助

摘　　要：采用热聚法将甲叉双丙烯酰胺 (MBBA)聚合并共价交联在硅烷化的玻璃微珠上 ,同时将指示剂Ru(Ⅱ ) 邻啡咯啉配合物物理包埋于聚合物中 ,研制了一种基于荧光猝灭原理的光纤氧气传感器 .采用NaHSO3 O2 MnSO4体系引发MBBA水溶液热聚合反应 ,通过确定NaHSO3 ,MnSO4,MBBA和Ru(phen) 3 Cl2 的最佳反应浓度以及玻璃微珠的尺寸 ,优化了聚合反应条件 ,改善了指示剂的固定效果 ,制备了性能较好的传感器探头 .该传感器的检测下限为 5× 10 -6(V/V) ,响应时间为 10s .该传感器连续工作 5 0min ,重复性标准偏差为± 1% .A new fiber optic oxygen sensor based on the fluorescence quenching of Ru(phen)(3)Cl-2 has been fabricated by thermo-polymerization method. The ruthenium dye is immobilized in N,N-methylene bisacrylamide (MBBA) polymer by physically trapping while MBBA is covalently cross-linked on the glass micro-pearls by NaHSO3-O-2-MnSO4 initiator system. The immobilization stability of ruthenium dye and performance of the sensor are improved by the new polymerization system. The polymerization reactivity is enhanced by optimizing the concentration of NaHSO3, MnSO4, MBBA, Ru(phen)(3)Cl-2 and the best diameter of the glass micro-pearls. An absolute detection limit of 5 x 10(-6) (V/V) and the response time of 10 s can be achieved. The sensor is fully reversible and highly reproducible. The standard deviation of around +/- 1% within 50 min consecutive measurements has been observed for various oxygen concentrations.

关 键 词：热聚法 指示剂 光纤氧气传感器 荧光猝灭 共价交联 物理包理 氧气浓度 环境监测 甲叉双丙烯酰胺 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]