A drug controlled release transdermal microneedle system with magnetocaloric effect and its preparation method and application
A technology of drug controlled release and magnetocaloric effect, which is applied in the field of medicine, can solve problems such as being easily affected by diet, difficult to control drug release behavior, and difficult absorption of macromolecular drugs, so as to improve drug delivery and release efficiency and reduce drug storage capacity. Control and improve the effect of drug therapy
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Embodiment 1
[0032] The drug controlled release transdermal microneedle system provided in this embodiment includes Fe embedded in the PCL. 3 o 4 Nanoparticles and the Mimetic Drug Rhodamine B. The preparation method of the drug controlled release transdermal microneedle system comprises the following steps:
[0033] Step 1, prepare the slurry: take 0.4g of PCL (polycaprolactone, a biopolymer material) and add it to an appropriate amount of chloroform, and seal it at room temperature for 4 hours to completely dissolve it in chloroform, and add 0.1g of Fe to the above solution 3 o 4 nanoparticles, stirred in a fume hood for 1-2h to make Fe 3 o 4 The nanoparticles are fully dispersed in the chloroform solution, and the solution is adjusted to an appropriate viscosity (5000~8000mPa.s).
[0034] Step 2, centrifugal casting molding: Add 0.2mL of the slurry in step 1 to the PDMS mold, centrifuge in a centrifuge at 4000rpm for 15min, take it out, then add 0.2mL of the slurry to the mold agai...
Embodiment 2
[0044] The drug controlled release transdermal microneedle system provided in this example is a drug controlled release transdermal microneedle system added with a low melting point monomer TMC to adjust the release performance on the basis of Example 1, and its preparation method is as follows:
[0045] Step 1, configure the slurry: take an appropriate amount of 0.3g PCL and add it to an appropriate amount of chloroform, and leave it sealed at room temperature for 4 hours to completely dissolve in chloroform, add 0.1g of TMC (trimethylene carbonate) and 0.1 g of Fe 3 o 4 Nanoparticles and drug Rhodamine B (2.5mg), stirred in a fume hood for 1-2h to make TMC and Fe 3 o 4 The nanoparticles are fully dispersed in the chloroform solution, and the solution is adjusted to an appropriate viscosity (5000~8000mPa.s);
[0046] Step 2, centrifugal casting molding: add 0.2mL of the slurry in step 1 to the PDMS mold, centrifuge in a centrifuge at 4000rpm for 15min, take it out; then ad...
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