人体呼出气体中的丙酮是糖尿病一个重要生理标志物，对丙酮的气敏检测可供发展新型无创糖尿病诊断技术。鉴于当前对糖尿病诊断方式便携化的需求，极为必要研发一种新型简单、低廉、小型化和即时在线测量的丙酮气敏传感器。本研究基于分子筛膜和WO3气敏传感膜复合结构，提出以高湿度背景为丙酮气敏检测环境，同时将开展：(1)高湿度条件下，通过WO3改性工艺获得高灵敏性丙酮气敏材料，同时阐明高湿度条件下WO3的丙酮气敏响应机理及材料改性增敏机制；(2)借助对分子筛材料的改性获得具有强丙酮气敏选择性的分子筛膜，同时探索复合型气敏传感器的丙酮响应机理及分子筛膜的丙酮气敏选择性原理；(3)优化分子筛膜/WO3复合型气敏传感器结构，同时验证气敏传感器在实际呼吸气氛中的应用效果，对其中可能存在的问题加以探讨和解决。通过本研究，力争为研发新型、便携化、低廉和即时在线的糖尿病辅助诊断用气敏传感器提供技术和理论支持。

Acetone in the human breath is an important marker for noninvasive diagnosis of diabetes. In the great demand of portable diagnose of diabetes, an easy, low cost, miniaturized and on-line gas sensor of acetone is highly required. In this research, a sensing mode under a highly humid background was proposed by using a composite structure of zeolite film and WO3 sensing film with these following steps: (1) with the modifications of WO3, the response of acetone was enhanced under humid atmosphere, in the meantime the mechanisms of acetone sensing and the enhancement of response with modifications of material were investigated under the humid atmosphere; (2) the selectivity was improved by using a modified zeolite film, at the same time the sensing mechanism of composite gas sensor and the selective sensing of acetone for zeolite film was studied; (3) the composite structure was optimized and then the sensing performance of zeolite film/WO3 gas sensor was examined under the real working conditions to justify the utility and issuers existed will be discussed. In general, this work will provide theoretical and experimental data to develop new generation, portable, low cost, on-line gas sensor of acetone for the diagnosis of diabetes.