

Provided that the correct acknowledgement is given and it is not used for commercial purposes. This article in other publications, without requesting further permission from the RSC, Nanofiltration filter paper based on multi-walled carbon nanotubes and cellulose filter papersĬreative Commons Attribution-NonCommercial 3.0 Unported Licence. Based on the change in the filter paper properties after impregnation, the optimal filter paper strength index and filtration performance were observed at a solid PF content of 8.4%. The PF on the fiber surfaces and at the junction of the fibers covered the MWCNTs. After impregnation with PF, the mechanical properties of the air filter paper were significantly enhanced.

Compared with the cellulose fibers (CFs), the average pore diameter of the 0.1% MWCNT–CF filter paper was reduced by 8.05%, the filtration efficiency was increased by 0.64%, and the physical properties were slightly enhanced. The optimum impregnation concentration of the MWCNT was 0.1%. The results showed that MWCNTs were present on the surfaces of the fibers and between the pores, which increased the specific surface area of the fibers and enhanced the effective interception of the particles. The filter paper was prepared by impregnation with multi-walled carbon nanotubes (MWCNTs) and phenol-formaldehyde (PF). We report a nanofiltration paper that is based on wood fiber filter paper with good mechanical properties and a three-dimensional network structure. Air filter paper with a high filtration efficiency that can remove small-size pollutant particles and toxic gases is vital for human health and the environment.
