TY  - EJOU
AU  - Liu, Yongchun 
AU  - Qiao, Ni 
AU  - Yang, Yanli 
AU  - Li, Yanchun 
AU  - He, Chunxiao 
AU  - Wang, Siyang 
AU  - Liu, Chengcheng 
AU  - Lei, Ruixia 
AU  - Li, Wang 
AU  - Gao, Wenwen 

TI  - Characterization of Flame Retardancy and Oil-Water Separation Capacity of Superhydrophobic Silylated Melamine Sponges
T2  - Fluid Dynamics \& Materials Processing

PY  - 2024
VL  - 20
IS  - 2
SN  - 1555-2578

AB  - A silylated melamine sponge (SMS) was prepared by two simple steps, namely, immersion and dehydration of a melamine sponge coated with methyltrichlorosilane. The silylated structure of SMS was characterized by FT-IR (Fourier-transform infrared) spectroscopy, SEM (Scanning electron microscopy) and in terms of water contact angles. Its oil-water absorption and separation capacities were measured by FT-IR and UV-visible spectrophotometry. The experimental results have shown that oligomeric silanol covalently bonds by Si−N onto the surface of melamine sponge skeletons. SMS has shown superhydrophobicity with a water contact angle exceeding 150° ± 1°, a better separation efficiency with regard to diesel oil (by 99.31% (wt/wt%) in oil-water mixture and even up to 99.99% (wt/wt%) for diesel oil in its saturated aqueous solution. Moreover, SMS inherited the intrinsic flame retardancy of the melamine sponge. In general, SMS has shown superhydrophobicity, high porosity, excellent selectivity, remarkable recyclability, and better absorption capacity for various oils and organic solvents, and a high separation efficiency for oil in saturated aqueous solutions.
KW  - Methyltrichlorosilane; silylated melamine sponge (SMS); superhydrophobicity; absorption capacity; oil-water separable efficiency; flame retardancy

DO  - 10.32604/fdmp.2023.041928