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Kinetic characterization of swelling of liquid crystalline phases of glyceryl monooleate

Abstract

Research in this paper focuses on the kinetic evaluation of swelling of the liquid crystalline phases of glyceryl monooleate (GMO). Swelling of the lamellar and cubic liquid crystalline phases of GMO was studied using twoIn vitro methods, a total immersion method and a Franz cell method. The swelling of the lamellar phase and GMO having 0 %w/w initial water content was temperature dependent. The swelling ratio was greater at 20°C than 37°C. The water uptake increased dramatically with decreasing initial water content of the liquid crystalline phases. The swelling rates obtained using the Franz cell method with a moist nylon membrane to mimic buccal drug delivery situation were slower than the total immersion method. The swelling was studied by employing first-order and second-order swelling kinetics. The swelling of the liquid crystalline phases of GMO could be described by second-order swelling kinetics. The initial stage of the swelling (t < 4 h) followed the square root of time relationship, indicating that this model is also suitable for describing the water uptake by the liquid crystalline matrices. These results obtained from the current study demonstrate that the swelling strongly depends on temperature, the initial water content of the liquid crystalline phases and the methodology employed for measuring the swelling of GMO.

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Correspondence to Jaehwi Lee.

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Lee, J., Choi, SU., Yoon, MK. et al. Kinetic characterization of swelling of liquid crystalline phases of glyceryl monooleate. Arch Pharm Res 26, 880–885 (2003). https://doi.org/10.1007/BF02980036

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  • DOI: https://doi.org/10.1007/BF02980036

Key words

  • Glyceryl monooleate
  • Liquid crystalline phases
  • Cubic phase
  • Lamellar phase
  • Swelling