The invention discloses an amphiphilic ternary
polymer brush and a nano
capsule. The amphiphilic ternary
polymer brush has the following general formula, wherein A is
polymer main chain, B is lipophilic polymer
side chain, C is photo-crosslinked polymer
side chain, D is hydrophilic polymer
side chain, and the side chains B, C and D are randomly grafted onto the main chain A; and the nano
capsule is prepared through dispersing the amphiphilic ternary
polymer brush into an oil-water two-phase
system, and then performing light crosslinking reaction or reaction initiated by light. The amphiphilic ternary
polymer brush solves the difficulty that the particle size of the
capsule can not be adjusted and controlled effectively by using the conventional segmented copolymers, and the size of the prepared photo-crosslinked nano capsule is easily adjusted and controlled; the nano capsule prepared by the
emulsion self-
assembly method is simple in operation and easy to use in large-scale preparation; the prepared hollow nano capsule is large in
casting quantity; the photo-crosslinked nano capsule provided by the invention is stable, and according to the light crosslinking method, nontoxicity and safety are reliazed, and the
environmental protection is realized. The amphiphilic ternary
polymer brush has the following general formula: A-g-(B-r-C-r-D).