Surfaces and Interfaces, cilt.71, 2025 (SCI-Expanded, Scopus)
This study aims to produce three-dimensional (3D) boron nitride-coated highly hydrophobic sponges characterized by high mechanical strength, flame retardancy, and reusability for application as sorbent material in wastewater treatment. Boron nitride nanosheets (BNNSs) were synthesized using the facile liquid exfoliation method as a dipping solution in the coating process. The oil and organic material removal capability in wastewater treatment was assessed after coating sponges (melamine, polyurethane, cellulose) with varying pore sizes as 3D scaffolds with BNNSs via the layer-by-layer (LBL) deposition approach. Additionally, burning, mechanical strength, and reusability tests were conducted on the sponges. The morphological images of the sponges were determined using a scanning electron microscope (SEM) analysis. The surface area of the sponges was recorded using the Brunauer–Emmett–Teller (BET) method, while hydrophobicity was determined using a contact angle device. Functional groups in the structure of the sponges obtained by Fourier Transform Infrared (FT-IR). As a result of sorption tests, boron nitride silane-coated melamine and polyurethane sponges can absorb 32 times their own weight of pollutants with high reusability. At the same time, combustion tests revealed that the coated sponges exhibited combustion resistance for more than 180 s, whereas the uncoated sponges burned in 5 s. Compression tests showed that sponges coated with boron nitride retained their mechanical properties better than uncoated sponges under a 40 % compressive strain. The continuous sorption system confirmed that boron nitride-coated sponges are capable of efficiently cleaning water contaminated with organic solvents, facilitating the transition from the batch system to the pilot scale.