Nanoporous films of polydiacetylenes for visual sensing of volatile organic compounds

用于挥发性有机化合物视觉传感的聚二乙炔纳米多孔薄膜

基本信息

批准号：
267083402
负责人：
Professor Dr. Si Wu
金额：
--
依托单位：
Max-Planck-Institut für Polymerforschung
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2015
资助国家：
德国
起止时间：
2014-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/267083402?language=en
关键词：
Nanoporous films polydiacetylenes visual sensing

项目摘要

Many volatile organic compounds (VOCs) are harmful to human health and the environment. Simple and efficient methods are urgently needed to detect and discriminate various low-concentration VOCs in air. Polydiacetylenes are promising sensing materials for VOCs because their color can change by exposure to VOCs which can easily be observed. Crucial problems in the development of polydiacetylene-based VOC sensors are: A long response time due to the slow diffusion of VOCs in polydiacetylene films and unsufficiently known relationships between chemical structures and their colorimetric responses to VOCs. To solve the problem of long response time, I plan to develop nanoporous films of polydiacetylenes to quickly detect and discriminate various VOC vapors. To overcome the slow diffusion, we will synthesize block copolymers consisting of a diacetylene-containing block, a poly(ethylene oxide) block and a cleavable junction between the two blocks. Nanoporous polydiacetylene sensor films will be prepared by microphase separation of the block copolymers, removal of the poly(ethylene oxide) block and subsequent photopolymerization of the diacetylene-containing block. We expect that the nanoporosity of polydiacetylene films facilitates the penetration and accumulation of VOC molecules, which speeds up the detection of VOCs. We will vary the morphology of nanoporous polydiacetylene films by chemical modifications and study its impact on sensitivity and response time of VOC detection. To improve understanding of relationships between chemical structures of polydiacetylenes and their colorimetric response to VOCs, I plan to compare colorimetric response of different polydiacetylenes with theoretically predicted color changes. Improved basic understanding of such structure-property relations will enable polydiacetylene sensor arrays with good selectivity to different VOCs which are suitable for visual detection.

许多挥发性的有机化合物（VOC）对人类健康和环境有害。迫切需要简单有效的方法来检测和区分空气中的各种低浓度VOC。聚乙烯乙烯是VOC的有前途的传感材料，因为它们的颜色可以通过暴露于很容易观察到的VOC来改变。基于聚二乙烯的VOC传感器的发展中的关键问题是：由于VOC在聚乙烯乙烯膜中的缓慢扩散以及化学结构与其对VOC的比色性响应之间的较长响应时间。为了解决较长响应时间的问题，我计划开发纳米多孔膜的聚丙烯烯烯，以快速检测和区分各种VOC蒸气。为了克服缓慢的扩散，我们将合成由含二乙烯的块，聚乙烷氧化物块和两个块之间可切合的连接组成的块共聚物。纳米多孔聚乙二醇传感器膜将通过块共聚物的微相分离，去除（氧化乙烷）块以及随后的含二乙烯二乙烯块的光聚糖化来制备。我们预计聚二乙烯膜的纳米质量有助于VOC分子的渗透和积累，从而加快了VOC的检测。我们将通过化学修饰来改变纳米多孔聚二乙烯膜的形态，并研究其对VOC检测的敏感性和响应时间的影响。为了提高对聚乙烯烯的化学结构及其对VOC的比色响应之间的关系，我计划比较不同聚乙烯基烯的比色响应与理论上预测的颜色变化。对这种结构特性关系的基本理解的改进将使对适合视觉检测的不同VOC具有良好选择性的聚二乙烯传感器阵列。