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Naturally occurring tubular halloysite is a potential drug carrier because of the significant deposit, unique mesoscopic (2-50 nm) or even macroscopic (>50 nm) lumen, and excellent biocompatibility.The drugs loaded on halloysite exhibited slow release under thediffusion limitation by the halloysite nanotube.However, due to the weak interaction between halloysite and guest, the loading capacity ofhalloysite was relatively low.This drawback severely limits the application of halloysite as carrier in pharrnaceutics.