Process for preparing a polypropylene-based sponge-like porous thin film

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Process for preparing a polypropylene-based sponge-like porous thin film

  • US 11,883,792 B1

  • الصحة - Health

  • 2024

  • مكتب البراءات الأمريكي - US Patent Office

  • Saleem; Junaid (Al-Ahsa, SA), S K; Safdar Hossain (Al-Ahsa, SA), Moghal; Zubair Khalid Baig (Al-Ahsa, SA), McKay; Gordan (Al-Ahsa, SA)

  • Sponge-like porous polypropylene thin film, and a method for preparing a sponge-like porous polypropylene thin film. The method includes dissolving polypropylene in an organic solvent to form a solution under reflux condition; adding a cavity forming agent to the solution and mixing the solution until the cavity forming agent is well-dispersed therein; applying the well-dispersed solution onto the solid substrate through spin coating to form a thin film on the solid substrate; peeling the thin film off the solid substrate; extracting the cavity forming agent from the peeled thin film by washing the peeled thin film in an aqueous or nonaqueous solvent, thereby obtaining a sponge-like porous polypropylene thin film with cavities, macro-voids, and micropores. The sponge-like porous polypropylene thin film is used as an oil sorbent. The sponge-like porous polypropylene thin film has about 400 to about 700 swellable cavities per cm.sup.2.