Preparation of bi‐continuous poly(acrylonitrile‐co‐methyl acrylate) microporous membranes by a thermally induced phase separation method

Abstract

Poly(acrylonitrile-co-methyl acrylate) [P(AN-MA)] flat microfiltration membranes were successfully prepared via the thermally induced phase separation (TIPS) method, by using low polar caprolactam (CPL) and methoxypolyethylene glycol 550 (MPEG 550) as the mixed diluent. In this work, P(AN-MA) membranes exhibit bi-continuous networks, porous surfaces, high porosity, and big pore size, when membrane fabricated from a high MPEG 550 content, low P(AN-MA) concentration, and small cooling rate, it can be dry state preservation and do not need to be impregnated by any solvent. When the ternary system was composed of 15 wt % P(AN-MA), 12.5 wt % CPL, and 87.5 wt % MPEG 550, formed at 25 8C air bath, membrane has the highest water flux of 4420 L m 22 h 21 . The obtained P(AN-AN) membrane displays a high carbonic black ink rejection ranging from 83.7 to 98.5 wt %. Moreover, P(AN-MA) polymer not only retains the advantages of PAN but also reduces the polar component from 16.2 to 10.77 MPa 0.5. It can be used membrane matrix to obtain pore structure and excellent mechanical property membrane via TIPS. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46173.

The Photocatalysis-Enhanced TiO2@HPAN Membrane with High TiO2 Surface Content for Highly Effective Removal of Cationic Dyes

“…In detail, an amount of core–shell SiO 2 @TiO 2 was first made, where the shell silica (SiO 2 ) acted as a shield. Second, the mixture of SiO 2 @TiO 2 nanoparticles and a PAN-based copolymer was used as raw materials to form a porous membrane via TIPS . Finally, the blend membrane was hydrolyzed in 10% sodium hydroxide (NaOH) solution for a while when a portion of nitrile (−CN) side groups on PAN molecules was converted into carboxyl (−COOH groups) or hydroxyl (−OH groups).…”

“…Second, the mixture of SiO 2 @TiO 2 nanoparticles and a PANbased copolymer was used as raw materials to form a porous membrane via TIPS. 28 Finally, the blend membrane was hydrolyzed in 10% sodium hydroxide (NaOH) solution for a while 29 when a portion of nitrile (−CN) side groups on PAN molecules was converted into carboxyl (−COOH groups) or hydroxyl (−OH groups). Meanwhile, the shell SiO 2 dissolved, and the cores TiO 2 , getting rid of the restriction from the outer shell, immigrated to the membrane surface.…”

Thermal Expansion Behavior of Thermally Expandable Microspheres Prepared by Suspension Polymerization Using P(AN‐MMA‐MAA) Core/Shell

“…Thermally expandable microspheres (TEMs) were developed by Dow Chemicals in the early 1970s 1 and since then, they have been used for diverse industrial applications. [2][3][4][5][6] TEMs are used in inks to obtain 3D patterns such as lightweight fillers and wallpaper, textiles and braille printings. They are used in automobiles for tire weight reduction and car body coatings and are also used for making disposable pumps or valves for microfluidic systems.…”

“…Thermally expandable microspheres (TEMs) were developed by Dow Chemicals in the early 1970s and since then, they have been used for diverse industrial applications . TEMs are used in inks to obtain 3D patterns such as lightweight fillers and wallpaper, textiles and braille printings.…”

Preparation And Characterizations Of Poly(vinyl butyral)/Caprolactam/Polyethylene Glycols Hydrophilic Flat‐sheet Membrane Through Thermally Induced Phase Separation

“…used CPL as a diluent to produce PVDF membrane with desirable bicontinuous structures. Lin et al . use CPL and methoxypolyethylene glycol 550 as the mixed diluent successfully prepare Poly(acrylonitrile‐co‐methyl acrylate)[P(AN‐MA)] microporous membranes, which membrane exhibit bicontinuous networks, high porosity and high water flux.…”