Synthesis and performance of different polyurethane foams as oil sorbents

Abstract

Oil sorption (g g 21 ) through different polyurethane foams has been investigated in this study. Polyurethane foams were synthesized with different additives: glycerol, propylene glycol, polyethylene glycol 400, and 1-dodecanol. All foams were applied as sorbents of diesel, motor oil, gasoline, kerosene, and crude oil. The foams were characterized using Fourier transform infrared spectroscopy, thermogravimetry and differential scanning calorimetry, compressive resistance at 10% deformation and the elastic modulus, scanning electron microscopy, and apparent density. The best performance of oil sorption was achieved with PUF-3, which has the greatest amount of the chain extender polyethylene glycol 400 and lowest density of all the evaluated foams. The sorption capacities (g g 21 ) of PUF-3 were 16.8 (diesel), 15.7 (gasoline), 20.7 (oil motor), 25.4 (kerosene), and 29.8 (crude oil) and 100% removal of diesel from water was achieved, approximately. The foams with chain extenders and lower density values performed better as oil sorbents.

Facile fabrication of zeolitic imidazolate framework hollow fibre membranesviaa novel scalable continuous fluid circulation process

“…[17][18][19] In regards to oil/water mixtures, separation efficiency is usually optimised by exploiting the membrane surface wettability to achieve the selective removal of oil molecules from the aqueous phase. [20][21][22][23][24] Besides, the specific membrane surface area is considered crucial for separation performance, improving the availability of interactive sites on the surface. [25][26][27] To satisfy these unique demands, membrane functionalisation with carboxyl, hydroxyl or amino groups or membrane decoration with various nanomaterials such as metal-organic frameworks (MOFs) have been shown to be effective on surface modification.…”

Biomedical applications of polyurethane materials and coatings

“…Hydrogen bonds can also form between N -H and C = O groups, either within hard segments, soft segments or bridging the two. 33 Hydrogen bonding in the hard phase between the urethane bonds creates a physical crosslinking point, preventing polymer deformation due to chain slippage. Three-dimensional crosslinking can be achieved when multifunctional components such as triisocyanates or branched hydroxyl polyols are used.…”

Recyclable porous polyurethane sponge for highly efficient oil–water separation

“…[11][12][13] Due to their excellent overall performance, porous TPU materials have been prepared using the thermally induced phase separation method and freeze-drying technology, and are widely used in the field of oil/water separation. 14 However, the freedrying process is usually time-consuming. In this article, TPU sponge was fabricated using the thermally induced phase separation method and selective dissolution of PEG components without the need of free-drying process (Figure 1).…”