Preparation Sensitive Materials Of Fiber Optic Oxygen Sensor By Thermo-polymerization Method And Their Properties,Application Research

The detection of the dissolved oxygen and the gaseous oxygen is very important in many fields such as medicine, industrial analysis and environmental monitoring. Therefore, the researches of fiber optical oxygen sensors have gotten attention of people in recent years. Fiber optic oxygen sensor have many advantages such as intrinsic safety and high sensitivity, high detection precision, quick response, anti-disturbance of electromagnetism, and it can be used for long-distance, successive and on-line monitoring of dissolved oxygen and the gaseous oxygen in dangerous environment. In this thesis, the oxygen sensitive materials and glucose sensitive materials had been developed by thermo-polymerization method including carrier covalence method and carrier covalence-cross linking method, and the properties had been investigated using the detection experiment of oxygen and spectrophotometer, at the mean time, the applications of oxygen sensitive materials in fiber optical gaseous oxygen sensor and fiber optical dissolved oxygen sensor, and that of biology sensitive materials in fiber optical dextrose sensor had been studied in this paper. Major content of this work includes five aspects as follows: (1). Oxygen sensitive materials had been prepared by carrier covalence method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(2). Oxygen sensitive materials had been prepared by carrier covalence-cross linking method, and the preparation mechanism of the materials had been investigated by FI-IR, SEM, and the detection experiment of oxygen. Then through the detection of oxygen and spectrophotometer, the sensitivity and stability had been estimated, and it was studied that the properties of materials would be affected by the various factors.(3). For the detection of gaseous oxygen, the fiber optical sensor on basis of oxygen sensitive materials had a respond time of 10s, detection limit of 5ppmand detection precision of 0.5%. The sensor had good repeatability and stability, a less delay and at least 1 year life-span. And at the same time, the sensor could be used in various environments for the detection of gaseous oxygen.(4). The application of oxygen sensitive materials in fiber optical dissolved oxygen sensor was studied: The respond time is 20s and the repeatability and stability are excellent. The detection of the sensor is not affected by pH value, but is influenced by the temperature of solution, and only could be used in low-temperature solution for detection.(5). Glucose oxidase glass micro-pearls, the biology sensitive materials was prepared based on oxygen sensitive materials made by thermo-polymerization method, and could be utilized to detected the concentration of glucose in solution.