| abstract |
The invention provides a filter material comprising a support layer; a first selection layer is located above the support layer; and a second selection layer is located on the first selection layer. Wherein the first selection layer is formed by interlacing a polyimine and an ionic polymer, wherein the polyimine has at least one repeating unit of the structure represented by the formula (I): wherein the A1 system □, or □; A2 is □, or □; R1 and R2 are independently -H, -CF3, -OH, -Br, -Cl, -F, C1-6 alkyl, or C1-6 alkoxy; And, X and Y are independently a single bond, -O-, -CH2-, -C(CH3)2-, or -NH-. |