In particular, by rational designing topological structure of block copolymers, mesoporous materials with grafted polymers on the pore walls can be prepared. For instance, for ABC triblock terpolymer with a degradable end-block, mid-block-grafted mesopores is able to be prepared by removing end-block after selectively etching. For example, Hillmyer and co-workers reported the preparation of hydrophilic mesoporous materials using polylactide-b-poly(N,N-dimethylacrylamide)-b-polystyrene (PLA- PDMA-PS). Also, Ndoni and co-workers reported nanoporous materials with hydrophilic pore walls from polydimethylsiloxane-b-poly(tert-butyl acrylate)-bpolystyrene (PDMS-PtBA-PS). In addition to the chemical properties of the pore walls, the tortuosity and continuity of the pores in mesoporous materials also play a crucial role in their performance. Self-assembly of block copolymers can lead to various morphologies, including alternating lamellar (L), hexagonally packed cylindrical (HC), and spherical (S) structures. Furthermore, self-assembly of block copolymers can also lead to three distinct structurally continuous cubic geometries: double gyroid (G), double diamond (D), and plumber's nightmare (P). The transport efficiency of mesoporous materials prepared from block copolymers can be quantified using the morphology factor (ƒ).