Fabrication of surface skinless membranes of epoxy resin-based mesoporous monoliths toward advanced separators for lithium ion batteries

Abstract

In this article, we propose a versatile method to prepare epoxy resin-based monolith membrane without any surface skin layer through polymerization induced spinodal type phase separation using a poly(vinyl alcohol) sacrificial film, where the monolith is a porous material with a bicontinuous skeletal structure.

Lubrication Characteristics of Epoxy Resin‐Based Monolithic Thin Films with a Well‐Defined Porous Morphology

“…Further, it is important to verify whether or not a skin layer had formed on the monolithic film. The FE‐SEM image of the thick sample (Figure a) suggests the formation of a skin layer, as was expected considering the lower surface tension of the epoxy resin than that of the PEG . Therefore, before mechanical and tribological measurements, the skin layer was removed by polishing the surface with abrasive paper in water without damaging the monolithic framework.…”

“…The epoxy resin‐type polymer monolith possesses high mechanical strength derived from the epoxy resin frame itself and the fine network, in addition to having a high liquid‐holding capacity, owing to its high porosity (≈60%). We have expanded their applications by controlling their macroscopic shapes to form membranes and particles . Most importantly, these monolithic materials have been prepared with special care to prevent the formation of a nonporous polymeric surface (a “skin” layer), thus enabling the permeability of liquids.…”

Morphology Control and Metallization of Porous Polymers Synthesized by Michael Addition Reactions of a Multi-Functional Acrylamide with a Diamine

“…Various types of porous polymers have been prepared by polymerization-induced phase separation (vinyl type monomers , click type polymerizations such as epoxyamine reaction [23][24][25][26][27][28][29][30][31][32][33][34], epoxy-thiol reaction [35][36][37], thiol-ene/yene [38][39][40][41][42][43][44], thiol-(meth) acrylate [45][46][47]) and temperature induced phase transfer . Applications of the porous polymers have been developing in various fields, for examples separation columns for liquid chromatography [1,2,[4][5][6][7][8][10][11][12][13][14][15][16][17][18]24,25,[27][28][29][30]32,…”

Thermal Degradation Behavior and Kinetics of 3D Porous Polycarbonate Monoliths

“…Additionally, they can also keep high stability in both a dry and wet states, excellent tolerance to a wide range of PH conditions . Based on the above advantages, porous polymer monoliths have been widely used in the fields of thermally responsive devices, adsorption separation, catalyst carriers, sensors, gas/liquid chromatography, molecular recognition, biological detection, separators for lithium ion battery, and so on. However, the weak thermal properties of polymers, which would have been further deteriorated by the porous structure polymer monoliths, such as low heat distortion temperature and thermal degradation temperature, severely restricted their applications in high temperature environment, including flame‐retardant materials, catalytic reaction, and oil pollution treatment .…”