MEMBRANE COMPRISING SELF-ASSEMBLED BLOCK COPOLYMER AND PROCESS FOR PRODUCING THE SAME BY SPIN COATING (IA)

• Main Authors: SHI, SELINA, AAMER, KHALED ABDEL-HAKIM HELMY
• Format: Patent
• Language: English; French
• Published: 04.09.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING-UP

The present invention takes advantage of the ability of the block copolymers having thermodynamically incompatible blocks to undergo phase separation and self-assemble into nanostructures, thereby creating membranes having uniform porosity. A diblock copolymer of the formula (I): is provided, wherein R1 is a C1-C22 alkyl group optionally substituted; R2 to R4 are C6-C20 aryl group or a heteroaryl group, optionally substituted. The method of making involves dissolving the diblock copolymer in a solvent system to obtain a polymer solution; spin coating the polymer solution onto a substrate; annealing the coating obtained to obtain a self-assembled structure; and soaking the self-assembled structure in a solvent or mixture of solvents to obtain a porous membrane. (see above formula)