Modified porous composite structure, method for manufacturing the same and method for absorbing organic liquid

A method for manufacturing a modified porous composite structure, comprising:

• providing a functionalized melamine sponge, wherein the functionalized melamine sponge has a repeat unit represented by Formula (i):
• wherein each of G1, G2, G3 independently represents a monovalent organic group comprising alkenyl groups or alkynyl groups;
• providing a porous organic framework source, wherein the porous organic framework source comprises a porous organic framework or a precursor of the porous organic framework, the porous organic framework and the precursor of the porous organic framework comprise a plurality of first ligands, and each of the first ligands comprises at least one tetrazine group;
• conducting a connecting step, wherein at least one of the G1, the G2, and the G3 is reacted with the tetrazine group, so that the functionalized melamine sponge and the porous organic framework are connected, whereby the porous composite structure is obtained;
• and
• conducting a modifying step, wherein the porous composite structure is mixed with a modifying group donor, the modifying group donor comprises a reactive group and a modifying group, the reactive group is covalently connected to the modifying group, and the reactive group is an alkenyl group, an alkynyl group, an aldehyde group, a ketone group or a combination thereof, the reactive group is reacted with one of the tetrazine groups, so that the modifying group is connected to the porous composite structure to obtain the modified porous composite structure.