β-Cyclodextrin-PLA-PEG-PEI

The cyclodextrin molecule has a slightly conical hollow cylindrical three-dimensional ring structure. In its hollow structure, the outer upper end (larger open end) is composed of secondary hydroxyl groups of C2 and C3, and the lower end (smaller open end) is composed of primary hydroxyl groups of C6, which is hydrophilic, while the hydrophobic region is formed in the cavity due to the shielding effect of C-H bond. Poly(D,L-lactide)-Polyethylene glycol-Polyethylenimine is an ABC block copolymer, PLA-PEG-PEI is a cationicpolymer can be used for drug delivery systems, PEI can choose branch or linear.