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

2021 ◽  
Author(s):  
Tao Liu ◽  
Chenchen Cai ◽  
Ruijia Ma ◽  
Yongfei Deng ◽  
Lingyun Tu ◽  
...  
Keyword(s):  
Cellulose Nanofiber ◽  
Air Filter ◽  
Highly Efficient ◽  
Humidity Resistance

Flexible hydroxyapatite ultralong nanowire-based paper for highly efficient and multifunctional air filtration

2017 ◽  
Vol 5 (33) ◽  
pp. 17482-17491 ◽  
Author(s):  
Zhi-Chao Xiong ◽  
Ri-Long Yang ◽  
Ying-Jie Zhu ◽  
Fei-Fei Chen ◽  
Li-Ying Dong
Keyword(s):  
Pressure Drop ◽  
Filter Paper ◽  
Low Pressure ◽  
Air Filtration ◽  
Air Filter ◽  
Highly Efficient ◽  
Removal Efficiencies

Ultralong hydroxyapatite nanowire-based air filter paper with a low pressure drop and high removal efficiencies for PM2.5 and PM10 has been developed.

scholarly journals PVP-Assisted Shellac Nanofiber Membrane as Highly Efficient, Eco-Friendly, Translucent Air Filter

2021 ◽  
Vol 11 (23) ◽  
pp. 11094
Author(s):  
Shanshuai Lu ◽  
Congling Li ◽  
Rui Liu ◽  
Aifeng Lv
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Light Transmittance ◽  
Liquid Droplets ◽  
Air Filtration ◽  
Nanofiber Membrane ◽  
Air Filters ◽  
Air Filter ◽  
Highly Efficient ◽  
Pm2.5 And Pm10

Particulate matter (PM), composed of tiny solids and liquid droplets in polluted air, poses a serious threat to human health. Traditional air filters usually cause secondary pollution due to their poor degradability. Here, shellac, as an environmentally friendly natural organic material, was successfully applied to fabricate biodegradable air filters. Since pure shellac fiber shows poor mechanical properties and bad light transmittance, we then introduced a small amount of polyvinylpyrrolidone (PVP) in the shellac solution to prepare highly efficient air filter membranes by the electrospinning method. The prepared PVP-assisted shellac nanofiber membrane (P-Shellac FME) demonstrated improved filtration efficiencies as high as 95% and 98% for PM2.5 and PM10, respectively. The P-Shellac FME also showed good stability, with filtration efficiencies still above 90% and 95% for PM2.5 and PM10 even after six hours of air filtering under high PM concentrations. The pressure drop going through the filter was only 101 Pa, which is also comparable to the value of 76 Pa obtained using commercial polypropylene nanofibers (PP nanofibers, peeled off from the surgical mask), indicating good air permeability of P-Shellac FME. Additionally, P-Shellac FME also showed the advantages of translucence, biodegradability, improved mechanical properties, and low cost. We believe that the P-Shellac FME will make a significant contribution in the application of air filtration.

scholarly journals Preparation of Fibrillated Cellulose Nanofiber from Lyocell Fiber and Its Application in Air Filtration

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1313 ◽  
Author(s):  
Jin Long ◽  
Min Tang ◽  
Yun Liang ◽  
Jian Hu
Keyword(s):  
Pressure Drop ◽  
Filter Paper ◽  
Figure Of Merit ◽  
Cellulose Nanofibers ◽  
Cellulose Nanofiber ◽  
Dramatic Improvement ◽  
Air Filtration ◽  
Air Filter ◽  
Lyocell Fiber ◽  
Filter Papers

Ambient particulate matter less than 2.5 μm (PM2.5) can substantially degrade the performance of cars by clogging the air intake filters. The application of nanofibers in air filter paper can achieve dramatic improvement of filtration efficiency with low resistance to air flow. Cellulose nanofibers have gained increasing attention because of their biodegradability and renewability. In this work, the cellulose nanofiber was prepared by Lyocell fiber nanofibrillation via a PFI-type refiner, and the influence of applying a cellulose nanofiber on filter paper was investigated. It was found that the cellulose nanofibers obtained under 1.00 N/mm and 40,000 revolutions were mainly macrofibrils of Lyocell fiber with average fiber diameter of 0.8 µm. For the filter papers with a different nanofiber fraction, both the pressure drop and fractional efficiency increased with the higher fraction of nanofibers. The results of the figure of merit demonstrated that for particles larger than 0.05 µm, the figure of merit increased substantially with a 5% nanofiber, but decreased when the nanofiber fraction reached 10% and higher. It was concluded that the optimal fraction of the cellulose nanofiber against PM2.5 was 5%. The results of the figure of merit were related to the inhomogeneous distribution of nanofibers in the fibrous structure. The discrepancy of the theoretical and measured pressure drop showed that a higher nanofiber fraction led to a higher degree of fiber inhomogeneity.

scholarly journals Highly Efficient, Flexible, and Recyclable Air Filters Using Polyimide Films with Patterned Thru-Holes Fabricated by Ion Milling

2019 ◽  
Vol 9 (2) ◽  
pp. 235 ◽  
Author(s):  
Sang-Jun Choi ◽  
Kyung Kim ◽  
Hyun Kim ◽  
Jun Yoon ◽  
Mi Lee ◽  
...  
Keyword(s):  
Tap Water ◽  
Electrostatic Force ◽  
Polyimide Film ◽  
Ion Milling ◽  
Polyimide Films ◽  
Environmental Application ◽  
Air Filter ◽  
Air Conditioners ◽  
Highly Efficient ◽  
High Work

We present the first demonstration of the environmental application of a polyimide film (Kapton) with patterned thru-holes as a novel, efficient, flexible, recyclable, and active particulate matter (PM) air filter. The Kapton air filter captures PM using micro-sized thru-holes and the strong electrostatic force because of its high work function. It is highly efficient, transparent, flexible, and heat-resistant. Furthermore, it can be recycled simply by washing it with tap water. The proposed PM filter is a promising candidate for use as a highly efficient and economical recyclable air filter for home appliances, such as air-purifiers, air-conditioners, and humidifiers, as well as industrial filtration systems.

Highly Efficient Capillary Photoelectrochemical Water Splitting Using Cellulose Nanofiber-Templated TiO2Photoanodes

2014 ◽  
Vol 26 (14) ◽  
pp. 2262-2267 ◽  
Author(s):  
Zhaodong Li ◽  
Chunhua Yao ◽  
Yanhao Yu ◽  
Zhiyong Cai ◽  
Xudong Wang
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Cellulose Nanofiber ◽  
Highly Efficient

Highly Efficient Oxidative Desulfurization Catalyzed by a Polyoxometalate/Carbonized Cellulose Nanofiber Composite

2019 ◽  
Vol 34 (1) ◽  
pp. 778-786
Author(s):  
Mengxiang Gan ◽  
Guoqing Yang ◽  
Zhihan Wang ◽  
Xiaofeng Sui ◽  
Yu Hou
Keyword(s):  
Oxidative Desulfurization ◽  
Cellulose Nanofiber ◽  
Nanofiber Composite ◽  
Highly Efficient
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