High surface area polypyrrole scaffolds for tunable drug delivery

Area of Science:

• Materials Science
• Biomedical Engineering
• Polymer Chemistry

Background:

• Intrinsically conducting polymers, like polypyrrole (PPy), are promising for drug delivery due to electrically tunable release rates.
• Controlled drug release systems are crucial for effective therapeutic outcomes, especially for implantable devices.

Purpose of the Study:

• To fabricate 3D ordered macroporous PPy inverse opal thin films.
• To evaluate the in vitro viability of these PPy films for controlled drug delivery.
• To investigate the effect of electrical stimulus on drug release profiles.

Main Methods:

• Fabrication of PPy inverse opal thin films via electropolymerization through a poly(methyl methacrylate) colloidal crystal template.
• Creation of macroporous PPy scaffolds by chemical etching of the template.
• Loading of model drug (risperidone) and entrapment with a PPy overlayer.
• Characterization using SEM and FTIR spectroscopy.
• In vitro drug release studies with and without electrical stimulation.

Main Results:

• Successful fabrication of 3D macroporous PPy inverse opal thin films.
• Enhanced drug loading and release capabilities of PPy inverse opal scaffolds compared to non-porous PPy films.
• Electrical stimulus modulated drug release profiles through film actuation.
• Demonstrated potential for implantable drug delivery devices.

Conclusions:

• 3D macroporous PPy inverse opal films are viable platforms for controlled drug delivery.
• The porous structure enhances drug loading and release efficiency.
• Electrical tunability of drug release offers personalized therapeutic potential for implantable devices.