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Synthesis of Curcumin/Polyrhodanine nanoparticle with microbial disinfection property
국준원,이준영,김중현 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
Curcumin (natural antimicrobial agent) became used in Indian traditional medicine and it is one of the three curcuminoids present in turmeric. Polyrhodanine (PRd, antimicrobial polymer) has attracted considerable attention in various application fields such as anticorrosion, antibacterial, and antihistaminic agents. In this study, we synthesized curcumin/ PRd nanoparticle with microbial disinfection property to release control by the encapsulation of natural antimicrobial agent and antimicrobial polymer. The size and morphology of curcumin/PRd nanoparticle were analyzed by DLS and FE-SEM(average 200 nm). The thermal stability of curcumin/PRd nanoparticle was confirmed by TGA. The release bahavior and synthetic mechanism of curcumin/PRd nanoparticle was demonstrated by UV-vis, HPLC(high performance liquid chromatography), FT-IR and XRD(X-ray diffraction).
국준원,조원석,이준영,김중현 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Herein, we describe an encapsulation process that improves these properties, using a polyrhodanine shell material synthesized by oxidative polymerization. In this study, we synthesized and characterized curcumin/polyrhodanine nanocapsules (CPR-NCs) prepared with varying H2O2 amounts. By changing the rhodanine monomer ratio, the CPR-NC shell thickness, as observed by transmission electron microscopy, could be controlled. Release behavior of curcumin was characterized by UV-vis spectrometer. In according to the time, the absorbance of curcumin was gradually increased at 400nm(-1). And we were able to confirm that release concentration of curcumin over the six days in 67.33 %. For microbial disinfection test of curcumin, polyrhodanine, and CPR-NC, it was to conduct the analysis the Minimal Inhibition Concentration(MIC).
조원석,국준원,이승모,고원건,김중현 한국고분자학회 2016 Macromolecular Research Vol.24 No.6
Phase change material-polystyrene (PCM-PSt) nanocapsules were prepared via a modified resin-fortified miniemulsion (RFME) polymerization process using an alkali soluble resin (ASR). Poly(styrene-co-acrylic acid) (SAA), which is a functional amphiphilic polymer, was used as the surfactant for the resin-fortified emulsion polymerization. A co-surfactant and a crosslinker were adopted to improve the PCM encapsulation efficiency. The average particle size and heat capacity of the optimized PCM-PSt nanocapsules were about ~280 nm as measured by dynamic light scattering (DLS) and ~110 J/g as measured by differential scanning calorimetry (DSC), respectively. The morphology and the inner structure of the nanocapsules were investigated using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The synthesized nanocapsules showed good adhesive and thermal storage properties, and were amenable for processing by dip-coating methods.
Fabrication of Transparent anti-fogging and non-dripping coating on greenhouse film
주성환,국준원,이준영 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Transparent polymer materials such as thermoplastic PE play an essential role in our daily life. However, due to the unavoidable condensation of water vapor on solid surfaces, these materials undergo fogging under normal operating conditions. Specially, The hydrophobic surface of PE causes poor wettability and poor adhesion in practical applications. The condensed water forms spherical droplets to minimize the contact area between the water and the film. These droplets reduce the light transmission and due to gravity will often fall down inside the greenhouse resulting in physical damage to plants as well as increasing the risk of disease. Herein, we developed facile super-hydrophilic coating by using polymer and additives. In our super-hydrophilic coating achieved high durable anti-fogging and self-cleaning properties.