2.3.6. Dynamic absorption test (DAT)In this test, a drop of liquid is applied to the sample and theimage of the spreading droplet is recorded as a function of timeusing an automated digital camera. In order to measure the contactangle, both treated and untreated CNF networks were prepared byvacuum filtration using Whatman filter paper. The networks weredried at room temperature followed by hot plate at 60◦C for 48 h.The contact angle measurements were performed in laboratory