The invention belongs to the field of microneedle patches, and particularly discloses a PEBA-based intelligent
insulin microneedle patch and a preparation method thereof.The PEBA-based intelligent
insulin microneedle patch comprises a three-layer bionic microneedle structure, and the three-layer bionic microneedle structure is formed by sequentially connecting a needle tip layer, a needle body layer and a flexible substrate; the needle tip layer is formed by wrapping
insulin and a PBA compound with PEBA, and the insulin contains a
trehalose-
sucrose protective agent; the needle body layer is formed by wrapping poly (lactic-co-
glycolic acid) (
PLGA) microspheres with PEBA, and basic insulin is loaded in the
PLGA microspheres; the flexible substrate is formed by packaging
gallium-
indium-
tin alloy through PEBA; space-time accurate delivery of insulin is achieved through a three-layer bionic structure, the needle point layer rapidly releases
medicine through glucose responsiveness of a PEBA-PBA compound, the needle body layer achieves long-acting slow release of basic insulin through
PLGA microspheres, the
liquid metal circuit of the flexible substrate
monitors blood glucose in real time and feeds back and regulates
voltage, and a'detection-decision-execution '
closed loop is formed.