2results about How to "Good formaldehyde removal effect" patented technology

The invention belongs to the field of modified activated carbon, and particularly relates to a design method of environment-friendly activated carbon modified amine impregnation liquid for efficiently removing formaldehyde. The design method comprises the following steps: constructing a group library of an impregnation liquid molecular structure; constructing a molecular structure and a property constraint condition of the steeping liquor molecular structure model; constructing a relational expression of the equilibrium adsorption capacity of the impregnation liquid molecules adsorbed on the activated carbon and a relational expression of the theoretical formaldehyde removal capacity of the modified activated carbon obtained after the impregnation liquid molecules are modified; gAMS software is adopted as analog calculation and impregnation liquid molecules are determined. According to the method disclosed by the invention, when the molecular structure and the property constraint condition are designed, the safety and the environmental performance of molecules of the impregnation liquid are considered, so that the obtained impregnation liquid has good safety and environmental properties, the prepared modified activated carbon has excellent formaldehyde removal performance, and the workload of screening the impregnation liquid in a traditional test is reduced.

This invention relates to the field of filter material technology and discloses a graphene filter material and its preparation method. The preparation method of the graphene filter material includes the following steps: (1) mixing graphene and a polymer carrier to obtain a mixture; (2) melting and extruding the mixture to obtain a melt, spinning the melt to obtain matrix fibers, and simultaneously intercalating graphene fibers into the matrix fibers to obtain the graphene filter material; wherein the intercalation speed is 2-50 m / s and the intercalation distance is 5-20 cm. This invention achieves uniform dispersion and embedding of graphene fibers in the matrix fibers by precisely controlling the intercalation speed and distance, avoiding local aggregation of graphene fibers, thereby increasing the graphene content in the filter product. The prepared graphene filter material has excellent filtration performance as well as antibacterial, antiviral and formaldehyde removal properties.