Noninvasive assessment of microbial activity by realtime monitoring degradation of cellulose acetate via electrochemical impedance measurement

Waimin, Jose; Jiang, Hongjie; Detwiler, David A.; Jiménez-Castañeda, Martha E.; Mutlu, Zeynep; Çakmak, Mükerrem; Filley, Timothy R.; Rahimi, Rahim

doi:10.1016/j.sna.2021.112543

Cited by 8 publications

(8 citation statements)

References 31 publications

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“…In addition, the non-biodegradability of these polymers will also lead to environmental pollution and negative effects on human and animal health. Cellulose acetate as a derivative material of cellulose, its degradability has been confirmed by many studies [14,15].…”

Section: Introductionmentioning

confidence: 81%

Biodegradable and Reusable Cellulose-Based Nanofiber Membrane Preparation for Mask Filter by Electrospinning

Wang

Liu

et al. 2021

Membranes

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Environmentally friendly face masks with high filtration efficiency are in urgent need to fight against the COVID-19 pandemic, as well as other airborne viruses, bacteria and particulate matters. In this study, coaxial electrospinning was employed to fabricate a lithium chloride enhanced cellulose acetate/thermoplastic polyurethanes (CA/TPU-LiCl) face mask nanofiber filtration membrane, which was biodegradable and reusable. The analysis results show that the CA/TPU-LiCl membrane had an excellent filtration performance: when the filtration efficiency reached 99.8%, the pressure drop was only 52 Pa. The membrane also had an outstanding reusability. The filtration performance maintained at 98.2% after 10 test cycles, and an alcohol immersion disinfection treatment showed no effect on its filtration performance. In summary, the CA/TPU-LiCl nanofiber membrane made in this work is a promising biodegradable and reusable filtration material with a wide range of potential applications, including high-performance face mask.

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Section: Introductionmentioning

confidence: 81%

Biodegradable and Reusable Cellulose-Based Nanofiber Membrane Preparation for Mask Filter by Electrospinning

Wang

Liu

et al. 2021

Membranes

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“…As the plot shows, the wet etched LC resonant sensor on a PCB had the lowest sensitivity (−2.6 kHz RH −1 ) which can be explained by the low water vapor absorption sites on the active sensing area on the FR‐4 plastic substrate. [ 53 ] However, the laser‐ablated single inductor and LC resonant sensor on the WPLP showed a higher sensitivity to changes in RH with an average sensitivity of −19.1 and −87 kHz RH −1 , respectively. As expected, the high surface area of the laser‐induced Al 2 O 3 nanoparticles provided considerably higher water vapor adsorption sites, which in turn resulted in a greater humidity sensing performance.…”

Section: Resultsmentioning

confidence: 99%

Wireless Humidity Sensor for Smart Packaging via One‐step Laser‐Induced Patterning and Nanoparticle Formation on Metallized Paper

Gopalakrishnan

Sedaghat

Krishnakumar

et al. 2022

Adv Elect Materials

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In this work, a scalable and rapid process is developed for creating a low‐cost humidity sensor for wireless monitoring of moisture levels within packaged goods. The sensor comprises a moisture‐sensitive interdigitated capacitor connected to a planar spiral coil, forming an LC circuit whose resonant frequency is a function of environmental humidity. The sensor is fabricated on a commercially available metallized parchment paper through selective laser ablation of the laminated aluminum (Al) film on the parchment paper substrate. The laser ablation process provides a unique one‐step patterning of the conductive Al layer on the paper while simultaneously creating high surface area Al2O3 nanoparticles within the laser‐ablated regions. The intrinsic humidity‐responsive characteristics of the laser‐induced Al2O3 nanostructures provide the wireless sensor with a tenfold higher sensitivity to humidity than a similar LC resonant sensor prepared by conventional photolithography‐based processes on FR‐4 substrates. The frequency change of the sensor is observed to be a linear function within the range of 0−85% RH, providing an average sensitivity of −87 kHz RH−1 with good repeatability and stable performance. Furthermore, the employment of scalable laser fabrication processes using commercially available inexpensive materials renders these technologies viable for roll‐to‐roll manufacturing of low‐cost wireless sensors for smart packaging applications.

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“…In this process, polyethylene terephthalate (PET) sheets were used as a substrate due to their low cost and flexibility. To improve the adhesion and spreading of the composite polymer, the screen-printed electrodes were plasma treated using a PE-25 plasma etching system operated at 50 kHz frequency and 200 W power for 45 s (Figure (a-iii)). Immediately after plasma treatment, 50 μL of each PEDOT PSS/PVA composite was cast onto the interdigitated area of the electrodes and dried under ambient conditions (19 ± 2 °C and 40% RH) (Figure (a-iv)).…”

Section: Methodsmentioning

confidence: 99%

Printed Low-Cost PEDOT:PSS/PVA Polymer Composite for Radiation Sterilization Monitoring

et al. 2022

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During the γ-radiation sterilization process, the levels of radiation exposure to a medical device must be carefully monitored to achieve the required sterilization without causing deleterious effects on its intended physical and chemical properties. To address this issue, here we have demonstrated the development of an all-printed disposable low-cost sensor that exploits the change in electrical impedance of a semi-interpenetrating polymer network (SIPN) composed of poly(vinyl alcohol) (PVA) and poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) as a functional polymer composite for radiation sterilization monitoring applications. Specifically, the PEDOT:PSS acts as the electrically conductive medium, while the PVA provides the ductility and stability of the printed sensors. During irradiation exposure, chain scission and cross-linking events occur concurrently in the PEDOT:PSS and PVA polymer chains, respectively. The concurrent scissoring of the PEDOT polymer and cross-linking of the PVA polymer network leads to the formation of a stable SIPN with reduced electrical conductivity, which was verified through FTIR, Raman, and TGA analysis. Systematic studies of different ratios of PEDOT:PSS and PVA mixtures were tested to identify the optimal ratio that provided the highest radiation sensitivity and stability performance. The results showed that PEDOT:PSS/PVA composites with 10 wt % PVA produced sensors with relative impedance changes of 30% after 25 kGy and up to 370% after 53 kGy (which are two of the most commonly used radiation exposure levels for sterilization applications). This composition showed high electrical impedance stability with less than ±5% change over 18 days after irradiation exposure. These findings demonstrate the feasibility of utilizing a printing technology for scalable manufacturing of low-cost, flexible radiation sensors for more effective monitoring of radiation sterilization processes.

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Noninvasive assessment of microbial activity by realtime monitoring degradation of cellulose acetate via electrochemical impedance measurement

Cited by 8 publications

References 31 publications

Biodegradable and Reusable Cellulose-Based Nanofiber Membrane Preparation for Mask Filter by Electrospinning

Biodegradable and Reusable Cellulose-Based Nanofiber Membrane Preparation for Mask Filter by Electrospinning

Wireless Humidity Sensor for Smart Packaging via One‐step Laser‐Induced Patterning and Nanoparticle Formation on Metallized Paper

Printed Low-Cost PEDOT:PSS/PVA Polymer Composite for Radiation Sterilization Monitoring

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