scholarly journals One-Step Bark-Like Imitated Polypropylene (PP)/Polycarbonate (PC) Nanofibrous Meltblown Membrane for Efficient Particulate Matter Removal

Polymers ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1307 ◽  
Author(s):  
Ting-Ting Li ◽  
Xixi Cen ◽  
Hai-Tao Ren ◽  
Fei Sun ◽  
Qi Lin ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Fiber Diameter ◽  
Average Fiber Diameter ◽  
Efficient Removal ◽  
Filtration Performance ◽  
Innovative Method ◽  
High Efficient ◽  
One Step ◽  
The Cost ◽  
Pm Removal

A bark-like imitated polypr opylene (PP)/polycarbonate (PC) nanofibrous membrane was constructed by one-step meltblown technique for efficient particulate matter (PM) removal. The effects of PC content (0%, 1%, 3%, 5%, and 7%) on membrane thermal stability, microscopic characteristics, filtration performance, hydrophilicity, and water vapor transmission were investigated. The results demonstrated that using facile design of incompatibility and viscosity difference between PC and PP polymers decreases average fiber diameter, creating a bark-like groove appearance and increasing surface potential, making a new PP/PC membrane with high filtration performance. The resultant PP/PC membrane had finer average fiber diameter of 0.63 μm, which was nearly 89.41% lower than PP membranes (5.95 μm), and its quality factor (0.036 Pa−1) was nearly 2.12 times than that of PP membranes (0.017 Pa−1) with the die hole diameter of 0.5 mm. This fabrication technique of a special meltblown filter membrane saves the cost of die retrofitting and post-processing, which provides an innovative method for particulate efficient removal of high efficient filters.

Submicron aerosol filtration performance of centrifugally spun nanofibrous polyvinylpyrrolidone media

2019 ◽  
pp. 152808371986504
Author(s):  
Gungor Melike ◽  
Mehmet D Calisir ◽  
Yasin Akgul ◽  
Sule Selcuk ◽  
Demir Ali ◽  
...  
Keyword(s):  
Produced Water ◽  
Fiber Diameter ◽  
Cross Linking ◽  
Average Fiber Diameter ◽  
Filter Media ◽  
Air Filter ◽  
Filter Efficiency ◽  
Filter Performance ◽  
Filtration Performance ◽  
Centrifugal Spinning

In this study, polyvinylpyrrolidone-based nanofibrous air filter media were produced via centrifugal spinning and subsequently stabilized by thermal cross-linking process. Samples were produced using solutions with three different polymer concentrations (5, 10 and 20 wt.%) and three different rotational speeds (4000, 6000 and 8000 r/min). After obtaining the optimum web structure with the lowest average fiber diameter and the most uniform distribution, the webs were later thermally cross-linked in order to stabilize polyvinylpyrrolidone against the degradative effects of water. In addition, the webs were subjected to dissolvability tests to see the efficacy of cross-linking treatment. Morphological, structural and chemical characterizations of the polyvinylpyrrolidone webs were performed by SEM, XRD and FTIR, respectively. Finally, filter efficiency and pressure drop were measured to assess filter performance. The results have shown that the lowest average fiber diameter is obtained at the highest rotational speeds. Subsequent thermal cross-linking treatment has been found to prevent fibers from dissolving in water. The produced water-resistant, environmentally friendly polyvinylpyrrolidone nanofibrous filter media has had a satisfactory filtration performance with a high filter efficiency of 99.995% and a high quality factor of 0.39 mm H2O−1.

High-efficient removal of U(VI) from aqueous solution by self-assembly pomelo peel/palygorskite composite

2021 ◽  
Author(s):  
Xiaofeng Huang ◽  
Qiulin Deng ◽  
Xingzhang Wang ◽  
Hongquan Deng ◽  
Tinghong Zhang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Self Assembly ◽  
Efficient Removal ◽  
Pomelo Peel ◽  
High Efficient

One-step preparation of polyimide-inlaid amine-rich porous organic block copolymer for efficient removal of chlorophenols from aqueous solution

2019 ◽  
Vol 78 ◽  
pp. 215-229 ◽  
Author(s):  
Yanyang Liu ◽  
Haijian Ou ◽  
Shangqing Li ◽  
Qingliang You ◽  
Huixian Liu ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Block Copolymer ◽  
Efficient Removal ◽  
One Step

Triboelectric nanogenerator enhanced multilayered antibacterial nanofiber air filters for efficient removal of ultrafine particulate matter

Nano Research ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 4090-4101 ◽  
Author(s):  
Guang Qin Gu ◽  
Chang Bao Han ◽  
Jing Jing Tian ◽  
Tao Jiang ◽  
Chuan He ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Triboelectric Nanogenerator ◽  
Efficient Removal ◽  
Air Filters ◽  
Ultrafine Particulate Matter
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