Polymeric composite particles are provided that can be used for the storage and delivery of various biologically active agent. The polymeric composite particles contain a porous polymeric core and a coating layer around the porous polymeric core. The porous polymeric composite particles typically further include a biologically active agent positioned within the porous polymeric core but not covalently bonded to the porous polymeric core. The biologically active agent can be released from the polymeric composite particle by diffusing out of the porous polymeric core through the coating layer.
