Improvement of Air Filters by Nanocelluloses

Nemoto, Junji; Soyama, Toshihiko; Saito, Tsuguyuki; Isogai, Akira

doi:10.2524/jtappij.70.1072

Cited by 5 publications

(2 citation statements)

References 23 publications

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“…Xiong et al prepared a biodegradable CNFs air filter with a high filtration capacity using a freeze-drying technique, and a high efficiency of 94.6% for PM 0.3 removal was achieved while maintaining a relatively low pressure drop of 174.2 Pa. This excellent biodegradable high-performance cellulose-based aerogel air filtration material will provide a new direction for the application of CNFs in air filtration …”

Section: Introductionmentioning

confidence: 99%

“…This excellent biodegradable high-performance cellulose-based aerogel air filtration material will provide a new direction for the application of CNFs in air filtration. 9 However, air filters are common control technologies of atmospheric pollutants that can be operated under different environments. 10 Operating conditions include different temperatures and relative humidity (RH).…”

Section: ■ Introductionmentioning

confidence: 99%

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Super-hydrophobic Cellulose Nanofiber Air Filter with Highly Efficient Filtration and Humidity Resistance

Liu

Cai

et al. 2021

ACS Appl. Mater. Interfaces

122

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High-air humidity, especially condensation into droplets under the influence of temperature, can pose a serious threat to air purification filters. This report introduces the use of methyltrimethoxysilane (MTMS) for the silanization hydrophobic modification of cellulose nanofibers (CNFs) and obtains an air filter with super-hydrophobicity (CA = 152.4°) and high-efficiency filtration of particulate matter (PM) through the freeze-drying technology. The antihumidity performance of CNFs filters that undergo hydrophobic modification in high-humidity air is improved. Especially in the case of high-humidity air forming condensed water droplets, the increase in the rate of filtration resistance of the hydrophobically modified CNFs filter is much lower than that of the unmodified filter. In addition, the water-vapor-transmission rate of the hydrophobically modified filter is improved. More importantly, adding MTMS can regulate the porous structure of CNFs filters and improve the filtration performance. The specific surface area and the porosity of the filter are 26.54 m2/g and 99.21%, respectively, and the filtering effects of PM1.0 and PM2.5 reach 99.31 and 99.75%, respectively, while a low-filtration resistance (42 Pa) and a quality factor of up to 0.122 Pa–1 are achieved. This work has improved the application potential of high-performance air-purification devices to remove particulate pollution and may provide useful insights to design next-generation air filters suitable for application in high-air humidity.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%