title: Controlled transdermal iontophoresis of sulfosalicylic acid from polypyrrole/poly(acrylic acid) hydrogel.
abstract: A conductive polymer-hydrogel blend between sulfosalicylic acid-doped polypyrrole (PPy) and poly(acrylic acid) (PAA) was used as a carrier/matrix for the transdermal drug delivery under applied electrical field. PAA films and the blend films were prepared by solution casting with ethylene glycol dimethacrylate (EGDMA) as a cross-linking agent, followed by the blending of PPy particles and the PAA matrix. The effects of cross-linking ratio and electric field strength on the diffusion of the drug from PAA and PPy/PAA hydrogels were investigated using a modified Franz-diffusion cell with an acetate buffer of pH 5.5 and at 37 degrees C, for a period of 48h. The diffusion coefficient of the drug is calculated using the Higuchi equation, with and without an electric field, at various cross-linking ratios. The drug diffusion coefficient decreases with increasing drug size/mesh size ratio, irrespective of the presence of the conductive polymer as the drug carrier. The diffusion coefficient, at the applied electric field of 1.0V, becomes larger by an order of magnitude relative to those without the electric field.
authors: Center of Petroleum Petrochemicals and Advanced Materials, Chulalongkorn University, Bangkok, Thailand.
authors: Phithupha
authors: P
authors: Chansai
authors: Anuvat
authors: A
authors: Sirivat
authors: Sumonman
authors: S
authors: Niamlang
authors: Datchanee
authors: D
authors: Chotpattananont
authors: Kwanchanok
authors: K
authors: Viravaidya-Pasuwat
mesh_terms: D000180:Acrylic Resins / Q000138:chemical synthesis / Q000737:chemistry*; D000279:Administration, Cutaneous; D000465:Algorithms; D000700:Analgesics / Q000008:administration & dosage* / Q000032:analysis / Q000737:chemistry / Q000493:pharmacokinetics; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D001557:Benzenesulfonates; D003432:Cross-Linking Reagents; D004058:Diffusion; D016503:Drug Delivery Systems; D004553:Electric Conductivity; D020100:Hydrogels / Q000138:chemical synthesis / Q000737:chemistry*; D007478:Iontophoresis; D008567:Membranes, Artificial; D008855:Microscopy, Electron, Scanning; D010316:Particle Size; D011758:Pyrroles / Q000138:chemical synthesis / Q000737:chemistry*; D012459:Salicylates / Q000008:administration & dosage* / Q000737:chemistry / Q000493:pharmacokinetics; D013053:Spectrophotometry; D017550:Spectroscopy, Fourier Transform Infrared; D044366:Transition Temperature; D014867:Water / Q000032:analysis; D000099166:Polyacrylamides
chemical_list: D000180:Acrylic Resins; D000700:Analgesics; D000894:Anti-Inflammatory Agents, Non-Steroidal; D001557:Benzenesulfonates; D003432:Cross-Linking Reagents; D020100:Hydrogels; D008567:Membranes, Artificial; D011758:Pyrroles; D012459:Salicylates; D014867:Water; C500827:polyacrylamide-polypyrrole; D000099166:Polyacrylamides; C003366:sulfosalicylic acid