Double-sided environmental sensor for high-efficiency particulate air filter

Vilmi, Pauliina; Śliz, Rafal; Fabritius, Tapio

doi:10.1109/i2mtc43012.2020.9128647

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…In our previous work [15] we proposed a concept based on a double-sided capacitive sensor element, to monitor a dust or lint accumulation onto an air filter. Those experiments were done in non-realistic conditions by adding the lint manually on the filter without an airflow, which is present in all air filtering applications.…”

Section: Introductionmentioning

confidence: 99%

Dust accumulation sensing system with a screen-printed interdigitated sensor

Vilmi

Schuss

Hannila

et al. 2022

2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Regardless of the importance of air filtering, there are quite few technologies to observe the purity of a filter. Optimizing the filter replacement cycle is necessary from the cost efficiency and the ecological point of view, being a motive for sensor technology development. In this paper, we propose and demonstrate a concept for that purpose. A capacitive sensor element is screen-printed directly onto the filter surface and assembled in 3D printed frame to observe the particle accumulation while the filter is in use. An additional sensor element is printed to the back side of the filter to act as a reference. That reference sensor improves the sensitivity of the system by enabling the compensation of the temperature and humidity fluctuations. The sensor was placed inside a robot vacuum cleaner and its performance was demonstrated and evaluated by repeated cleaning cycles in a controlled environment. By measuring the difference between the two capacitances of the sensors, an increase of up to 1.55 pF was observed, which equals +9.3% of sensor's initial capacitance value. After cleaning the sensor area, a permanent increase of 0.4 pF was measured, which equals +2.4% of the initial capacitance value.

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Section: Introductionmentioning

confidence: 99%

Dust accumulation sensing system with a screen-printed interdigitated sensor

Vilmi

Schuss

Hannila

et al. 2022

2022 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Field-Assisted Efficient Capturing and Analysis of Airborne Nanoparticulate Matter Using a Multifunctional Nanoporous Membrane

Kim,

Ryu,

Chang

et al. 2024

ACS Appl. Mater. Interfaces

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As the potential adverse health and environmental effects of nanoscale pollutants have garnered significant attention, the demand for monitoring and capturing ultrafine particulate matter has been growing. With the rise in ultrafine dust emissions, this issue has become increasingly important. However, submicron particles require advanced strategies to be captured because of their limited inertial effect. For example, electrostatic air filters have been investigated for their improved performance in the fine particle regime. On the other hand, Raman spectroscopy was proposed as a promising analytical strategy for aerosol particles because it can be used to conveniently detect analytes in a label-free manner. Thus, the synergistic integration of these strategies can open new applications for addressing environment-related challenges. This study presents a multifunctional approach for achieving both air filtration and surface-enhanced Raman scattering (SERS) for analyte identification. We propose a nanoporous membrane composed of a thin gold layer, copper, and copper oxide to provide the desired functions. The structures are produced by performing scalable electrodeposition and subsequent electron-beam evaporation, attaining an excellent filtration efficiency of 95.9% with an applied voltage of 5 kV for 300 nm KCl particles and a pressure drop of 121 Pa. Raman intensity measurements confirm that the nanodendritic surface of the membrane intensifies the Raman signals and allows for the detection of 10 μL of nanoplastic particle dispersion with a concentration of 50 μg/mL. Rhodamine 6G aerosol stream with an approximate particle deposition rate of 0.040 × 106 mm–2·min–1 is also identified in a minimum detectable time of 50 s. The membrane is shown to be recyclable owing to its structural robustness in organic solvents. In addition, the fatigue resistance of the structure is evaluated through 22,000 iterative loading cycles at a pressure of 177 kPa. No performance degradation is observed after the fatigue loading.

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Double-sided environmental sensor for high-efficiency particulate air filter

Cited by 2 publications

References 6 publications

Dust accumulation sensing system with a screen-printed interdigitated sensor

Dust accumulation sensing system with a screen-printed interdigitated sensor

Field-Assisted Efficient Capturing and Analysis of Airborne Nanoparticulate Matter Using a Multifunctional Nanoporous Membrane

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