A paper-based oxygen generating platform with spatially defined catalytic regions

Ochoa M., Rahimi R., Huang T. L., Alemdar N., Khademhosseini A., Dokmeci M. R., ...Daha Fazla

SENSORS AND ACTUATORS B-CHEMICAL, cilt.198, ss.472-478, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 198
  • Basım Tarihi: 2014
  • Doi Numarası: 10.1016/j.snb.2014.02.021
  • Dergi Adı: SENSORS AND ACTUATORS B-CHEMICAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.472-478
  • Anahtar Kelimeler: Oxygen generation, Parchment paper, Wound healing, Hydrogen peroxide, Manganese dioxide, HYDROGEN-PEROXIDE SOLUTIONS, ENDOTHELIAL GROWTH-FACTOR, HYPERBARIC-OXYGEN, DECOMPOSITION, THERAPY, MECHANISM
  • Marmara Üniversitesi Adresli: Hayır

Özet

A flexible, parchment paper/PDMS based platform for local wound oxygenation is fabricated and characterized. The platform consists of a PDMS microfluidic network bonded to a parchment paper substrate. Generation of oxygen occurs by flowing H2O2 through the channels and chemically decomposing it via a catalyst embedded in laser-defined regions of the parchment paper. PDMS is bonded to parchment paper using partially cured PDMS followed by a brief air plasma treatment, resulting in a strong bond. For pressures below 110 Torr the parchment paper is observed to be impermeable to water and hydrogen peroxide. The oxygen permeability of parchment paper is measured to be 1.42 mu L/(Torr mm(2) min). Using a peroxide flow rate of 250 mu L/min, oxygen generation in the catalyst spots raises the oxygen level on the opposite side of the parchment paper from atmospheric levels (21%) to 25.6%, with a long-term (30 h) generation rate of 0.1 mu L O-2/min/mm(2). This rate is comparable to clinically proven levels for adequate healing. Device and material in vitro biocompatibility is confirmed with NIH 3T3 fibroblast cells via alamar blue assays. (C) 2014 Elsevier B.V. All rights reserved.