Modifying the Fiber Structure and Filtration Performance of Polyester Materials Based on Two Different Preparation Methods

Abstract

How to build a satisfactory indoor environment has become increasingly important. In this paper, the synthesis and improvement of the most widely used polyester materials in China were carried out based on two different preparation methods, and the structures and filtration performances were tested and analyzed. The results showed that a carbon black coating was wrapped on the surfaces of the new synthetic polyester filter fibers. Compared with the original materials, the filtration efficiencies of PM10, PM2.5, and PM1 were increased by 0.88–6.26, 1.68–8.78, and 0.42–4.84%, respectively. The best filtration velocity was 1.1 m/s, and the new synthetic polyester materials with direct impregnation demonstrated superior filtration performance. The filtration efficiency of the new synthetic polyester materials was improved on the particulates with sizes of 1.0–5.0 μm. The filtration performance of G4 was better than that of G3. The filtration efficiencies of PM10, PM2.5, and PM1 were improved by 4.89, 4.20, and 11.69%, respectively. The quality factor value can be used to assess the comprehensive filtration performance of air filters in practical applications. It could provide reference values for the selection of synthetic methods of new filter materials.

Distribution and Fractal Characteristics of Outdoor Particles in High-Rise Buildings Based on Fractal Theory

“…The atmosphere in Xi'an is mainly composed of fine particles. This conclusion is consistent with the results presented in the relevant literature [45], which supports the results presented in this paper. These small particles pose a more serious threat [46]; therefore, there is an urgent need to remove them from the atmosphere.…”

Experimental Study of the Factors Influencing the Regeneration Performance of Reduced Graphite Oxide Filter Materials under Water Cleaning

“…where η 1 is cleanliness (%); m is the mass of residual dust in the filter material after cleaning (g); and M is the initial mass of the clean filter material (g). The air filters' filtration efficiency was calculated using Equation (2) [8,19].…”

“…where η is the filtration efficiency of air filters (%); C 1 is the concentration of particulate matter before filtration (µg/m 3 ); and C 2 is the concentration of particulate matter after filtration (µg/m 3 ). The air filters' filtration resistance was calculated using Equation (3) [8,19].…”

“…The repeatability was 5%. The average concentrations over 5 min before and after testing air filter materials were recorded [8]. Data were analyzed using mean values to reduce experimental error.…”

“…Air filters have been widely used as an effective method to address indoor pollutants [8]. As air filters are more frequently used on a large scale in the context of normalized epidemic prevention and control, they are also more frequently replaced [9].…”