Study of the incorporation of microchannels in PDMS

Renata Diehl


The use of masks has been used to combat the new coronavirus in preventing the spread of the disease. In addition to the necessary use of masks by those infected with the virus, health professionals were the main victims of this pandemic, and it is possible to observe that at the end of long periods they had bruises and dermatitis caused by this protective equipment on their faces. The I9MASKS project sought alternatives so that such problems could be remedied, giving more comfort to people and professionals.

One of the problems encountered in the constant use of masks is related to the misting and condensation of water droplets expelled during breathing, requiring a study of alternatives to solve such adversity. In this context, the work developed was based on the study of the incorporation of microchannels in the PDMS, so that there was a region of air circulation.

The work developed is based on a mold printed on a 3D printer in the format of channels and in Poysmooth material that were later incorporated into the manufacture of the PDMS with a 10: 1 ratio, which after curing was subjected to a bath in isopropyl alcohol, which provided the removing the Polysmooth filament through degradation.

At the end of this study we will try to demonstrate that it is possible to solve problems of condensation and breathability through micro-holes incorporated in the mask manufactured with the combination of 3D printing and degradation.