The electrospun polyamide 6 nanofiber membranes used as high efficiency filter materials: Filtration potential, thermal treatment, and their continuous production

2012 ◽  
Vol 128 (2) ◽  
pp. 1061-1069 ◽  
Author(s):  
Yin Guibo ◽  
Zhao Qing ◽  
Zhao Yahong ◽  
Yuan Yin ◽  
Yang Yumin
Keyword(s):  
Thermal Treatment ◽  
High Efficiency ◽  
Continuous Production ◽  
Polyamide 6 ◽  
Filter Materials ◽  
Nanofiber Membranes

scholarly journals Tannic acid-functionalized HEPA filter materials for influenza virus capture

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Subin Kim ◽  
Jinhyo Chung ◽  
Sang Hyun Lee ◽  
Jeong Hyeon Yoon ◽  
Dae-Hyuk Kweon ◽  
...  
Keyword(s):  
Influenza Virus ◽  
Tannic Acid ◽  
High Efficiency ◽  
Influenza Viruses ◽  
Capture Efficiency ◽  
Protective Equipment ◽  
Filter Materials ◽  
Washing Process ◽  
Pathogenic Viruses ◽  
Cost Efficient

AbstractInfluenza, one of the most contagious and infectious diseases, is predominantly transmitted through aerosols, leading to the development of filter-based protective equipment. Though the currently available filters are effective at removing submicron-sized particulates, filter materials with enhanced virus-capture efficiency are still in demand. Coating or chemically modifying filters with molecules capable of binding influenza viruses has received attention as a promising approach for the production of virus-capturing filters. For this purpose, tannic acid (TA), a plant-derived polyphenol, is a promising molecule for filter functionalization because of its antiviral activities and ability to serve as a cost-efficient adhesive for various materials. This study demonstrates the facile preparation of TA-functionalized high-efficiency particulate air (HEPA) filter materials and their efficiency in influenza virus capture. Polypropylene HEPA filter fabrics were coated with TA via a dipping/washing process. The TA-functionalized HEPA filter (TA-HF) exhibits a high in-solution virus capture efficiency of up to 2,723 pfu/mm2 within 10 min, which is almost two orders of magnitude higher than that of non-functionalized filters. This result suggests that the TA-HF is a potent anti-influenza filter that can be used in protective equipment to prevent the spread of pathogenic viruses.

scholarly journals Formation and characterization of polytetrafluoroethylene nanofiber membranes for high-efficiency fine particulate filtration

RSC Advances ◽  
2019 ◽  
Vol 9 (24) ◽  
pp. 13631-13645 ◽  
Author(s):  
Huan Xu ◽  
Wangyong Jin ◽  
Feng Wang ◽  
Guojin Liu ◽  
Chengcai Li ◽  
...  
Keyword(s):  
High Temperature ◽  
High Efficiency ◽  
Porous Membranes ◽  
Fine Particulate ◽  
Nanofiber Membranes ◽  
Particulate Filtration

Polytetrafluoroethylene (PTFE) porous membranes are widely used for high-temperature filtration.

scholarly journals Enhancement of co-production of lutein and protein in Chlorella sorokiniana FZU60 using different bioprocess operation strategies

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Ruijuan Ma ◽  
Zhen Zhang ◽  
Zhuzhen Tang ◽  
Shih-Hsin Ho ◽  
Xinguo Shi ◽  
...  
Keyword(s):  
High Efficiency ◽  
Continuous Production ◽  
Nitrogen Deficiency ◽  
Batch Cultivation ◽  
Chlorella Sorokiniana ◽  
Economic Feasibility ◽  
Commercial Application ◽  
Fed Batch ◽  
Two Stage ◽  
Microalgal Culture

AbstractCo-production of multiple compounds is an efficient approach to enhance the economic feasibility of microalgae-based metabolites production. In this study, Chlorella sorokiniana FZU60 was cultivated under different bioprocess strategies to enhance the co-production of lutein and protein. Results showed that both lutein and protein content (7.72 and 538.06 mg/g, respectively) were highest at the onset of nitrogen deficiency under batch cultivation. Semi-batch III strategy, with 75% microalgal culture replacement by fresh medium, obtained similar content, productivity, and yield of lutein and protein as batch cultivation, demonstrating that it can be used for stable and continuous production. Fed-batch II strategy, feeding with 1/3 modified BG11 medium, achieved super-high lutein and protein yield (28.81 and 1592.77 mg/L, respectively), thus can be used for high-output production. Besides, two-stage strategy, combining light intensity shift and semi-batch cultivation, gained extremely high lutein and protein productivity (15.31 and 1080.41 mg/L/day, respectively), thereby is a good option for high-efficiency production. Moreover, the fed-batch II and two-stage strategy achieved high-quality lutein and protein, thus are promising for the co-production of lutein and protein in C. sorokiniana FZU60 for commercial application.

Scalable and efficient perovskite solar cells prepared by grooved roller coating

2019 ◽  
Vol 7 (4) ◽  
pp. 1870-1877 ◽  
Author(s):  
Chenguang Xin ◽  
Xin Zhou ◽  
Fuhua Hou ◽  
Yawen Du ◽  
Wei Huang ◽  
...  
Keyword(s):  
Solar Cells ◽  
High Efficiency ◽  
Continuous Production ◽  
Perovskite Solar Cells ◽  
High Utilization ◽  
Utilization Ratio

The scalability of perovskite solar cells (PSCs) is another major challenge for PSCs besides high efficiency and stability. The grooved roller coating (GRC) method here enables the scalable and continuous production of PSCs with high utilization ratio of materials.

Multifunctional CeO2/Co3O4@polyacrylonitrile nanofibers for high-efficiency air-pollutant removal

2021 ◽  
pp. 004051752110457
Author(s):  
Qi Wang ◽  
Tingting Hu ◽  
Wenqi Zhang ◽  
Zhenlin Jiang ◽  
Pinhua Rao
Keyword(s):  
Air Pollutants ◽  
High Efficiency ◽  
Air Pollutant ◽  
Pollutant Removal ◽  
Total Volatile ◽  
Pressure Drops ◽  
Volatile Organic ◽  
Nanofiber Membranes ◽  
Total Volatile Organic Compounds ◽  
Pan Nanofiber

As many countries in the world are paying increasing attention to air quality, reducing the concentration of pollutants in the air, protecting human health and improving the ecological environment have become problems that need to be solved urgently. This paper describes how ceria and cobalt tetroxide@polyacrylonitrile (CeO2/Co3O4@PAN) nanofiber membranes are produced using electrospinning technology, which have broad applications for the removal of air pollutants. Results show that CeO2/Co3O4@PAN has high electrostatic attraction to particulate matter (PM). CeO2/Co3O4@PAN membranes show better mechanical properties, thermal stability and air-purification performance than pure PAN membranes. Nanofiber membranes with 5 wt% of CeO2/Co3O4 have excellent removal efficiency: 93.4% and 94.5% for PM2.5 and PM10, respectively, and 96.2% and 98% for formaldehyde and total volatile organic compounds, respectively. They also show low pressure drops, high stability and good recyclability. This work shows that they are promising candidates as highly stable, recyclable and efficient agents for the removal of air pollutants.

Effects of Molecular Weight and Thermal Treatment on Wear Behavior of Polyamide 6

2000 ◽  
Vol 46 (1-2) ◽  
pp. 361-376 ◽  
Author(s):  
M. Schnoor ◽  
P. Kronewald ◽  
K. Friedrich ◽  
M. Evstatiev ◽  
S. Fakirov
Keyword(s):  
Molecular Weight ◽  
Thermal Treatment ◽  
Wear Behavior ◽  
Polyamide 6

Solution‐blow spun PLA/SiO 2 nanofiber membranes toward high efficiency oil/water separation

2020 ◽  
Vol 137 (37) ◽  
pp. 49103 ◽  
Author(s):  
Beirong Ye ◽  
Chao Jia ◽  
Ziwei Li ◽  
Lei Li ◽  
Qiang Zhao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Water Separation ◽  
Oil Water Separation ◽  
Nanofiber Membranes ◽  
Oil Water

scholarly journals Controlled Morphology of Porous Polyvinyl Butyral Nanofibers

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Daniela Lubasova ◽  
Lenka Martinova
Keyword(s):  
Applied Voltage ◽  
High Efficiency ◽  
Polymer Concentration ◽  
Polyvinyl Butyral ◽  
Solution Concentration ◽  
Solvent Mixture ◽  
Electrospinning Process ◽  
Filter Materials ◽  
One Step ◽  
Poor Solvent

A simple and effective method for the fabrication of porous nanofibers based on the solvent evaporation methods in one-step electrospinning process from the commercial polyvinyl butyral (PVB) is presented. The obtained nanofibers are prevalently amorphous with diameters ranging from 150 to 4350 nm and specific surface area of approximately 2–20 m2/g. Pore size with irregular shape of the porous PVB fibers ranged approximately from 50 to 200 nm. The effects of polymer solution concentration, composition of the solvents mixture, and applied voltage on fiber diameter and morphology were investigated. The theoretical approach for the choice of poor and good solvents for PVB was explained by the application Hansen solubility parameter (HSP) and two-dimensional graph. Three basic conditions for the production of porous PVB nanofibers were defined: (i) application of good/poor solvent mixture for spinning solution, (ii) differences of the evaporation rate between good/poor solvent, and (iii) correct ratios of good/poor solvent (v/v). The diameter of prepared porous PVB fibers decreased as the polymer concentration was lowered and with higher applied voltage. These nanofiber sheets with porous PVB fibers could be a good candidate for high-efficiency filter materials in comparison to smooth fibers without pores.

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