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Polyurethane Fibers Bearing Nanoparticles of Polyacrylic Acid Graftedwith Oleylamine and Zwitterion
아르바나 무하메드,이운형,남진우,티안쿤,박주현 한국고분자학회 2024 폴리머 Vol.48 No.2
We developed a novel organic polymer using zwitterion from 1-(3-aminopropyl)imidazole and 1,3-propane sultone to fabricate NPs. Zwitterion was added to polyacrylic acid-grafted oleylamine (PAA-g-OA) by COOH activation and amidation to produce PAA-g-OA (zwitterion). Thereafter, the NPs were prepared using microemulsion methods and distributed in the polyurethane (PU) fibers via a wet-spinning process. The stretchable fiber structure of PU@PAA-g-OA (zwitterion) was demonstrated by the high elongation at break (600%). Also, the hydrophobic surface properties of fibers were modified to hydrophilic ones. These results suggest a novel approach that uses functional polymer nanoparticles to alter surface chemistry and enhance mechanical characteristics in textile applications.
전예지,박주현,이다빈,알렉스,팜티투이동,아르바나,신용훈,임기환,오경화 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
Ferroelectric polymers have been widely studied for piezoelectric applications because of their advantages including facile shaping process and surfaces at low cost. In this study, we present the influence of self-heating on the properties of piezoelectric sensors, using representative ferroelectric polymer poly(vinylidene fluoridetrifluoroethylene) (PVDF-TrFE). As capacitance is proportional to the permittivity, and in the case of PVDF-TrFE, the dielectric constant is proportional to temperature below 120 Celsius degrees. Due to facile orientation of dipoles, one can expect a significant increase in capacitance of devices. We prepared conjugated polymer nano-particles (CPNs) that efficiently harvest sunlight energy and release the energy as heat, and fabricated capacitors based on the composite films of PVDF-TrFE and CPNs. We characterize the structural variation and morphology of the films and investigate how the photothermal CPNs influences on capacitance under light irradiation.