Joon Yong Yoon

Bio: Joon Yong Yoon is an academic researcher from Hanyang University. The author has contributed to research in topics: Cavitation & Pressure drop. The author has an hindex of 15, co-authored 42 publications receiving 613 citations.

Thermal, mechanical and rheological properties of poly (lactic acid)/epoxidized soybean oil blends

Abstract: Poly(lactic acid) (PLA) was melt blended with epoxidized soybean oil (ESO) in an internal mixer and thermal, mechanical and rheological properties of the blends were investigated by means of differential scanning calorimetry, dynamic mechanical analysis, tensile test and small amplitude oscillatory shear rheometry. ESO lowered glass transition temperature and increased the ability of PLA to cold crystallization. The blend exhibited improved elongation-at-break along with a plastic deformation. The plasticization effect by ESO was also manifested by the lowering of dynamic storage modulus and viscosity in the melt state of the blends compared with neat PLA.

Research progress in toughening modification of poly(lactic acid)

Abstract: Renewable poly(lactic acid) (PLA) exhibits high strength and stiffness PLA is fully biodegradable and has received great interest However, the inherent brittleness of PLA largely impedes its wide applications In this article, the recent progress in PLA toughening using various routes including plasticization, copolymerization, and melt blending with flexible polymers, was reviewed in detail PLA toughening, particularly modification of impact toughness through melt blending, was emphasized in this review Reactive blending was shown to be especially effective in achieving high impact strength The relationship between composition, morphology, and mechanical properties were summarized Toughening mechanisms were also discussed © 2011 Wiley Periodicals, Inc J Polym Sci Part B: Polym Phys, 2011

Nanoarchitectured metal–organic framework/polypyrrole hybrids for brackish water desalination using capacitive deionization

Abstract: New families of materials that may potentially replace dominant carbon electrodes have emerged as a major research hotspot in the field of capacitive deionization (CDI). Here, we report a metal–organic framework (MOF)/polypyrrole (PPy) hybrid, in which conductive PPy nanotubes that are running through each MOF particle have the potential to increase the overall bulk electrical conductivity, thus promoting such a system as a good CDI electrode material. Consequently, the MOF/PPy hybrid shows a high desalination capacity of 11.34 mg g−1, which is amongst those of state-of-the-art CDI electrodes. Moreover, the MOF/PPy hybrid also shows a superior desalination performance for brackish water and good cycling stability, far exceeding typical carbon-based benchmarks. This is the first example of CDI electrodes derived from direct MOF-based materials, highlighting the potential of these hybrid systems as promising materials beyond traditional carbon electrodes.