Fabrication of superhydrophobic and superoleophilic polybenzoxazine-based cotton fabric for oil–water separation

Octadecyltrichlorosilane‐Modified Superhydrophobic‐Superoleophilic Stainless Steel Mesh for Oil‐Water Separation

“…The separation efficiency (γ) was calculated by using followed formula: Separation efficiency , where V 0 and V 1 are represent volume of the oil, after and before the separation process. [ 24 ] The low viscosity oil revealed separation efficiency 97 ± 1% due to their high flow rate though mesh. Conversely, high viscous vegetable and coconut oil could not completely pass out through mesh, which showed low separation efficiency ( Table 1 ).…”

Synthesis of Nontoxic Pyrazolidine-Based Benzoxazine-Coated Cotton Fabric for Oil–Water Separation

“…The sliding contact angle value observed for poly(PYBP-oda) is almost equivalent to that of the bisphenol Abased polybenzoxazine coated fabric (9°) reported earlier. 30 Poly(PYBP-oda) prepared in the present work can be used as a better coating material and can modify the surface of cotton fabrics with superhydrophobic characteristics. 3.9.…”

“…The separation efficiency observed for the poly(PYBP-oda)-coated fabric is almost equivalent to those of reported cotton fabrics coated with bisphenol A-based polybenzoxazine. 30 Thus, the synthesized pyrazolidine-based benzoxazines provide an insight that the benzoxazine substituted with heterocycles can be an alternative for bisphenol derivatives.…”

“…Among the technical textiles, cotton fabrics have received great attention and have been used in wide multifunctional applications such as anti-corrosion, anti-fogging/frosting, anti-bioadhesion, and water–oil separation. − In order to explore the technical applications, the post-functionalization of cotton fabrics with different chemical additives was carried out. , Functionalized cotton fabrics coated with different materials are found to possess a superhydrophobic behavior with higher values of water contact angle (WCA) and can be used for water–oil separation . Conventional polybenzoxazine and its hybrid materials have been recently employed over different filtration media in order to separate an oil–water mixture. − However, no significant focus has been paved toward the design and development of nontoxic benzoxazine monomers with a superior hydrophobic behavior.…”

Flame-Retardant Silanized Boron Nitride Nanosheet-Infused Superhydrophobic Sponges for Oil/Water Separation

“…Oily wastewater caused by an oil tanker accident in the operation, seabed oil production, and petrochemical plant, has brought devastating disasters to the environment. − For example, the explosion of “Front Altair” tanker caused by a torpedo has given rise to a massive spill of crude oil. Accordingly, seeking a technology that can separate oil/water mixtures effectively is urgently required. − Tremendous efforts have been devoted to develop green and safe oil/water separation materials (eg., fiber, copper mesh, molecular sieve, sponge, woven, etc.). Among them, three-dimensional (3D) porous commercial melamine sponge with the merits of low cost, lightweight, environment friendly, and intrinsic microlevel porous structure is promising for large scale oily wastewater treatment. , However, the melamine sponge with instinct hydrophilicity and lipophilicity always absorbs the water and oil simultaneously, which could reduce the separation efficiency and the sponge could become a flammable secondary pollutant. − Hence, the prerequisite to improve the oil/water mixtures separation efficiency of a sponge is to enhance its selectivity, for example, developing a superhydrophobic/superlipophilic sponge. , Meanwhile, the flame retardant property of the sponge is also crucial, as the sponge is inevitably exposed to the risk of fire and explosion when absorbing flammable crude oil and organic solvents. , In addition, most of the sponges with flexible segments are unstable in harsh environments, which could limit their large-scale application .…”