中文摘要：

为了拓展微结构聚合物光纤（MPOF）在化学传感领域内的应用研究以及对MPOF孔道内壁功能化修饰技术的深入研究,首先对36孔的MPOF孔道内壁进行酸催化水解处理,随后采用化学键合的方式将荧光探针曙红通过偶联剂负载于MPOF孔道内壁,从而制成用于pH值测定的传感探头。该传感探头被修饰后的多个孔道可以容纳微量的待测溶液,待测物与孔道内壁的荧光探针作用后,光信号将可以沿光纤传输,并被检测。整个化学反应的传感过程是在孔道内进行的,传导的光束能够和敏感材料相重叠,利于微量分析同时避免了对敏感膜的损坏。实验结果显示pH值在2.0～4.4范围内与荧光强度呈线性关系,该传感探头的重现性良好,并且采用此修饰方法制备的MPOF传感探头对于荧光探针的固定性比较好,无明显泄漏。

英文摘要：

The side wall of the Microstructured Polymer Optical Fiber（MPOF） was firstly treated with acid catalyzed hydrolysis of PMMA surfaces and then fluorescence indictor eosin was loaded on the surface of the inner wall of the MPOF by covalent bond.Therefore,a pH probe was made based on the modified MPOF.The trace liquid could be hold in the MPOF.After the fluorescence indictor reacted with the analyte,the changed fluorescence intensity could be transmitted by the fiber and get into the detection.Since the sensing process was carried out in the air holes,a significant portion of the guided light could overlap with sensing materials,microanalysis was possible,and simultaneously damage to the sensing layers could be avoided.The calibration graph of fluorescence intensity versus hydrogen peroxide concentration is linear in a concentration range of 2.0 ～4.4.The reproducibility of the probe is good without evidently dye leaking.