ИСТИНА

Composite aerogels based on reduced graphene oxide (rGO) and polytetrafluoroethylene (PTFE) have been synthesized at various ratios rGO/PTFE. The “sessile” method revealed that the outer surface of the body is superhydrophobic with water contact angles of 166 - 170°. The internal porous structure of these bodies was studied by the method of standard contact porosimetry. The porometric curves for octane and water intersect in the region of small pores, which corresponds to the fact that the specific surface area of aerogel in water is much higher than in octane, despite the fact that, as is known, octane wets almost all materials perfectly. This phenomenon, called superhydrophilicity, is explained by the swelling of the sample in water in the mesopore region due to the hydration of the -CO and -COH surface groups identified by IR spectroscopy. Thus, rGO/PTFE composite aerogels, which are superhydrophobic on the outside, are superhydrophilic on the inside in the area of small pores, which is a unique phenomenon. It was also found that the degree of superhydrophilicity decreases with an increase in the proportion of PTFE in the aerogel. The reasons for the superhydrophobicity of the outer surface of aerogel particles are considered.