Chae, Jihye Park, Sejoon Kim, Dong Young Joh, Han-Ik Kim, Jong Man Lee, Sungho Jo, Seong Mu 2024-01-19T23:02:55Z 2024-01-19T23:02:55Z 2021-09-03 2018-04 2073-4360 https://pubs.kist.re.kr/handle/201004/121541 To construct a polyetherimide (PEI)-reinforced polyvinylidene fluoride (PVdF) composite membrane with multicore-shell structure, a ternary solution was prepared and electrospun by single-nozzle electrospinning. A theoretical prediction was made for the feasibility of complete distinction of two phases. The diameters of the membrane fibers and the PEI multi-core fibrils varied with the PEI ratio and the spinning time, respectively. The tensile strength and modulus were improved to 48 MPa and 1.5 GPa, respectively. The shrinkage of the membrane was only 6.6% at 180 degrees C, at which temperature the commercial PE separator melted down. The reinforcement in mechanical and thermal properties is associated with multiple PEI nanofibrils oriented along the fiber axis. Indeed, the unique morphology of self-assembled multicore-shell fibers plays an important role in their properties. All in all, PEI/PVdF membranes are appropriate for a lithium-ion battery application due to their high mechanical strength, excellent thermal stability, and controllable textural properties. English MDPI Reinforced PEI/PVdF Multicore-Shell Structure Composite Membranes by Phase Prediction on a Ternary Solution Article 10.3390/polym10040436 1 POLYMERS, v.10, no.4 POLYMERS 10 4 N scie scopus 000435087400094 2-s2.0-85045419397 Polymer Science Polymer Science Article FIBROUS POLYMER ELECTROLYTES POLY(ETHER IMIDE) BATTERY FIBERS BLENDS SYSTEM THERMODYNAMICS PERFORMANCE SEPARATION electrospinning multicore-shell polymer blend membrane Flory-Huggins theory