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Gaseous flow through thin carbon films
Biomaterials, Medical Devices, and Artificial Organs
|January 1, 1980
Summary
Thin carbon films act as effective barriers, showing low gas permeability comparable to impermeable nuclear graphites. This research measured carbon film permeability to carbon dioxide (CO2) at room temperature.
Area of Science:
- Materials Science
- Biomedical Engineering
Background:
- Thin carbon films are crucial coatings for prosthetic devices, requiring barrier properties against gases and physiological fluids.
- Ensuring the impermeability of these films is vital for prosthetic device longevity and patient safety.
Purpose of the Study:
- To measure the gas permeability of thin carbon films.
- To evaluate their potential as effective barriers in prosthetic applications.
Main Methods:
- Carbon films with thicknesses ranging from 200 to 500 angstroms (Å) were tested.
- Carbon dioxide (CO2) gas permeability was measured at room temperature.
Main Results:
- The average permeability constant for 21 carbon films was determined to be 1.91 (+/- 1.02) x 10^-12 cm³-cm/cm²-sec-mmHg.
- This measured permeability is comparable to or lower than that of nuclear graphites.
Conclusions:
- Thin carbon films exhibit excellent gas barrier properties.
- These findings support the use of thin carbon films as effective coatings for prosthetic devices.