Differences of filtration performances between PTFE filter material and rGO filter material

Indoor environment has become a top priority for people under the context of increasingly serious air pollution and normalization of epidemic prevention and control. In this work, the comprehensive performances of the reduced graphene oxide filter material (rGO) are compared with the existing PTFE electrets material. The results demonstrated that: the filtration efficiency of PTFE material decreased with the increase of filtration velocity at the initial experiment, while the filtration efficiency of rGO/non-woven materials showed the opposite trend. With the increased of filtration velocity, the filtration efficiency of rGO/non-woven material was gradually higher than that of PTFE material. The filtration efficiency of rGO/non-woven material for PM10, PM2.5was 15.86% and 4.45% higher than that of PTFE material respectively at the filtration velocity was 0.25m/s. However, the improvement of filtration efficiency was accompanied by the increase of filtration resistance for rGO/non-woven material.Therefore, it should be reasonable select and use the air filters in using. This comparative experiment provides a data reference and basis for the synthesis and practical application of new filter materials in the future, and also has a certain significance.