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Multilayer track-etched membrane-based electroosmotic pump for drug delivery.

Qian YangZebo ZhangJunshu LinBoyu ZhuRongying YuXinru LiBin SuBo Zhao
Published in: Electrophoresis (2023)
Herein, we report an electroosmotic pump (EOP) based on a multilayer track-etched polycarbonate (PC) membrane. A remarkable increase of maximum backpressure (198.2-2400 mmH 2 O) of a fundamental pump unit was obtained at 0.8 mA, when the number of PC membranes was increased from 1 to 10. Meanwhile, the corresponding flow rate was increased from 80.3 to 111.7 µL/min. Furthermore, multiple pump units were assembled in series to obtain a multistage EOP. For a three-stage EOP (EOP-3), the operating voltage and power can be decreased significantly by 52%-72% under different driving currents, with a minimum power of 26.7 µW. Thus, EOP-3 can run stably over 35 h at a pulse current of 0.1 mA without the generation of gas bubbles. The pump was further integrated into a miniature device, which was successfully used to decrease the blood glucose level of diabetic rats by subcutaneous delivery of fast-acting insulin. This work brings a facile and efficient strategy to enhance the backpressure and lower the operating voltage and power of EOPs, which may find promising applications in drug delivery.
Keyphrases
  • drug delivery
  • blood glucose
  • diabetic rats
  • oxidative stress
  • glycemic control
  • blood pressure
  • quantum dots
  • drug release
  • skeletal muscle
  • insulin resistance
  • reduced graphene oxide