Two saturated fatty acids, namely palmitic acid (PA) and lauric acid (LA) were incorporated with glycidoxypropyl methoxy silane (GPTMS) into the nonwoven viscose fabric (NWVF) via chemical refluxation methodology. FE-SEM, EDS, and XPS analysis portray the existence of siloxane polymeric functionality on the fabric's surface. The 29Si solid-state NMR results reveal that the comprehensive peak position at −60.9 ppm attributed to the silicone atom of T3 structural unit [C–Si(OSi)3] and −54.9 ppm ascribed to the T2 unit [C–Si(OR)(OSi)2] which enrich the properties of fabrics towards the depletion of oil/organic solvents contamination from water. The modified viscose fabric surface showed outstanding superhydrophobic behavior with the respective WCA of 173 ± 2° for PA-GPTMS coated NWVF and 167 ± 2° for LA-GPTMS coated NWVF. Further, the constructed fabrics displayed high superoleofilicity to the oil and solvents with a contact angle of 0° distinctly. Thus, the chemically modified fabrics were inherently applied for the separation of the oil-water mixture and organic solvents. Surprisingly, it showed excellent separation efficiency for oil about 99 %, and organic solvents around 97 % respectively. The oil absorption capacity studies also demonstrated a high absorption volume of 14 g/g (18 ml/g) for PA-GPTMS-coated NWVF, and 13 g/g (17 ml/g) for LA-GPTMS-coated NWVF materials. The surface-modified materials were investigated for sustainability and lifespan. Remarkably, the PA-GPTMS-coated NWVF material showed admirable results of superhydrophobic/superoleophilic behavior retained (WCA >150°) in a harsh environment (70 h at 120 °C) and oil-water separation over 30 recycles. The above results suggested that the chemically modified nonwoven viscus fabrics would be a suitable potential candidate for the industrial-scale separation of immiscible oils/organic solvent contamination in water.