Phase inversion in reusable baths (PIRBs): A new polymer membrane fabrication method as applied to EVOH

Abstract

A flexible version of the phase inversion variety of porous membrane fabrication that employs cold solvent as a solidification bath is presented. A nonsolvent is included both in the dope and in the bath, and the liquid compositions are such that the bath is reusable; the concept is demonstrated for the water/dimethyl sulfoxide/poly(ethylene‐co‐vinyl alcohol) system. The effects of the reusable bath (RB) temperature and the bath strength on membrane morphologies are explored. From the pure water flux measurements, it is found that membranes prepared from RB possess higher permeation fluxes than those from other baths. Filtration against blue dextran (2000 kDa) indicates that those membranes precipitated from RB at 5 °C exhibit the highest rejection (98%) at the permeation flux of 14.56 L m−2 h−1. In addition, it is found that the composition of the RB remains unchanged after 240 applications of the new process. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48193.

Structure and catalytic performance relationship of ionic liquids as recyclable alcoholysis catalysts for green preparation of ethylene‐vinyl alcohol copolymer

“…Ethylene-vinyl alcohol (EVOH) copolymers are an important category of barrier materials that have been used in many applications such as packaging of food, cosmetics, and fuel tanks owing to their excellent barrier properties, nontoxicity, good chemical resistance, thermal stability, and processability. [1][2][3][4][5][6][7][8] Recently, the significant growth of green packing demand as well as their great potential for innovation fields including battery separator, 9,10 protein separation, 11,12 and drug release 13,14 have led to a resurgence of interest of these materials in both academia and industry. The current industrial production involves radical copolymerization of ethylene and vinyl acetate to give the precursor ethylene-vinyl acetate (EVA) copolymer, which is subjected to alcoholysis with methanol to afford EVOH.…”

Zeolite Composite Nanofiber Mesh for Indoxyl Sulfate Adsorption toward Wearable Blood Purification Devices

“…Therefore, we immobilized them within a poly(ethylene-co-vinyl alcohol) (EVOH) nanofiber mesh to improve the biocompatibility of zeolites and prevent outflow. EVOH is commonly used as a hemodialysis membrane due to its blood compatibility and biocompatibility; thus, the immobilization on an EVOH nanofiber mesh is expected to reduce the toxicity of zeolites because it can prevent zeolites from direct interaction with blood cells [22,23].…”

Shape-stabilized composite phase change film with good reversible thermochromic properties fabricated via phase inversion-assisted impregnation

“…In view of the shortcomings of manufacturing methods such as safety, complicated manufacturing processes and high cost, phase inversion has attracted people's attention as an alternative method for preparing high porosity cellulose lms. 36 Cellulose lms with clear channels and high porosity is a good choice for preparing the thermal insulation material. Composite PCMs with thermal insulation properties can alleviate temperature uctuations in closed environments and reduce the cost of temperature regulation, which may be a potential functional material for thermal management.…”