用喷墨打印塑化聚合物复合材料检测芳香化合物的近室温检测
Mohammad Mahdi Kiaee1, Tomas Maeder1, Juergen Brugger1
1Microsystem Laboratory, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
ACS sensors
|March 13, 2024
概括
这项研究使用可塑剂来增强化学抵抗性气体传感器,以显著加快响应时间并提高在室温附近检测挥发性有机化合物 (VOC) 的灵敏度.
科学领域:
- 材料科学 材料科学 材料科学
- 化学传感器 化学传感器
- 纳米技术纳米技术
背景情况:
- 使用聚合物导电填充复合材料的化学阻力气体传感器提供低功耗和高灵敏度的挥发性有机化合物 (VOC) 检测.
- 这些传感器的响应时间缓慢通常是由于聚合物玻璃过渡温度 (Tg) 超过工作温度,阻碍了分析物扩散.
- 增塑剂可以降低聚合物Tg以匹配工作温度,从而加速传感器响应.
研究的目的:
- 为了研究二乙烯甘醇二酸盐 (DEGDB) 作为增塑剂对聚乙烯 (PS) -碳黑 (CB) 复合传感器的传感性能的影响.
- 优化油墨配方和喷墨打印参数,以使用实验设计 (DoE) 方法进行增强的VOC传感器制造.
- 开发具有成本效益,高度灵敏和快速响应的VOC传感器,在室温附近运行.
主要方法:
- 使用按需喷墨打印来制造PS-CB复合膜,以控制形态和可重复性.
- 将二乙烯甘醇二酸盐 (DEGDB) 作为增塑剂纳入PS-CB矩阵.
- 实验设计 (DoE) 方法的应用,以优化油墨组成和打印参数.
主要成果:
- 使用DEGDB制造的传感器的响应时间增加了30倍,有效灵敏度提高了25倍,与无可塑化剂的同行相比.
- 在接近室温 (27°C) 的操作下,传感器的最佳性能得到了实现.
- 开发的传感器对芳香碳化合物 (多,,乙) 具有很高的选择性,检测极限 (LoD) 低于10ppm,对湿度的反应最小.
结论:
- 加入DEGDB作为增塑剂有效地减少了PS-CB化学阻抗传感器的响应时间.
- 优化的PS-DEGDB-CB复合材料是选择性,具有成本效益,接近室温的VOC检测的有希望的候选材料.
- 喷墨印刷与能源部相结合,为可扩展的制造先进的气体传感材料提供了可行的途径.
相关概念视频
Gas Chromatography: Types of Detectors-II
369
In gas chromatography, different detectors are employed to meet specific analytical needs. These detectors are often categorized based on their detection mechanisms and the types of compounds they are best suited to analyze. Thermal Conductivity Detectors (TCD), Flame Ionization Detectors (FID), and Electron Capture Detectors (ECD) represent common categories, each with unique operating principles and applications. However, beyond these, several other detectors are designed for more specialized...
369
Gas Chromatography: Types of Detectors-I
421
There are different types of detectors used in gas chromatography, each with its own specific properties that make it suitable for detecting certain types of analytes. The most commonly used detectors in GC are thermal conductivity detector (TCD), flame ionization detector (FID), and electron capture detector (ECD).
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
TCD is the earliest and most widely used detector that operates by measuring the changes in the thermal conductivity of the carrier gas. When a sample compound enters the detector,...
421
High-Performance Liquid Chromatography: Types of Detectors
553
The role of the detectors in High-Performance Liquid Chromatography (HPLC) is to analyze the solutes as they exit from the chromatographic column. The detector recognizes the solute's property and generates corresponding electrical signals, which are converted into a readable graph of the detector's response versus elution time called a chromatogram at the computer. There are several types of HPLC detectors, each with its own advantages and limitations, depending on the analyte...
553
Photoluminescence: Applications
393
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
393


