The aerogels in Section 2.1 are used to develop hydrophobic recycled cellulose aerogels.
For hydrophobic coating, two different coating methods: physical and chemical, are used.
In the physi-cal coating method, a commercial water repellent spray (ReviveX®Nubuck) is used to spray onto the dried aerogel from a distanceof 15 cm and then left to dry for one day at room temperature.