• Title/Summary/Keyword: poly(ethylene glycol) diacrylate

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Gas Permeation Properties of $CO_2$ Through Poly(ethylene Glycol) Diacrylate/Poly(Propylene Glycol) Diacrylate Membrane (Poly(ethylene glycol)diacrylate/poly(propylene glycol)diacrylate 막의 이산화탄소 기체 투과특성에 관한 연구)

  • Rhim Ji Won;Nam Sang Yong;Lee Sun Yong;Yun Tae Il
    • Membrane Journal
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    • v.14 no.3
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    • pp.250-257
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    • 2004
  • PEG(poly(ethylene glycol)) acrylate/PPG(poly(propylene glycol)) acrylate (PEG/PPG) was prepared using UV induced photopolymerization method to investigate gas permeation properties of the membrane. The effect of PPG content on the solubility, diffusivity, and permeability of $CO_2$, $O_2$, and $N_2$ in PEG/PPG membrane is reported at $25^{\circ}C$ and $35^{\circ}C$. PEG/PPG (9:1) membrane exhibits $CO_2$ permeability coefficient of 28.9 barrer and $CO_2$/$N_2$ pure gas selectivity of 57.9 at $25^{\circ}C$. Permeability coefficient of increased with increasing with PPG content in the membrane. PEG/PPG (5:5) membrane shows $CO_2$ permeability coefficient of 78.9 barrer and $CO_2$/$N_2$ pure gas selectivity of 33.2 at $25^{\circ}C$.

Velume Phase Transition of Poly (N-isopropylacrylamide-co-sodium methacrylate) Hydrogel Crosslinked with Poly(ethylene glycol) diacrylate (Poly(ethylene glyco1) diacrylate로 가교된 Poly(N-isopropylacrylamide) Hydrogel의 부피 상전이 특성)

  • 김선아;한영아;손성옥;지병철
    • Polymer(Korea)
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    • v.26 no.5
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    • pp.653-660
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    • 2002
  • The volume phase transition of poly(N-isopropylacrylamide) (PNIPAAm) and poly (N-isopropylacrylamide-co-sodium methacrylate) (P (NIPAAm-co-SMA)) hydrogels crosslinked with poly (ethylene glycol) diacrylate (PEGDA) was investigated in consideration of water content and surface area. The volume phase transition temperature of hydrogel was not affected by the concentration of crosslinking agent, which increased over 40$\^{C}$ by incorporating a small amount of SMA. Higher volume phase transition temperature was obtained when PEGAD was used as a crosslinking agent, suggesting that the chain length of crosslinking agent had a significant effect on the volume phase transition temperature. The surface area of PNIPAAm and P (NIPAAm-co-SMA) gels fell off around the volume phase transition temperature, resulting from the fact that the size of pores reduced remarkably in the course of the volume phase transition. Hence, the surface area and the pore size were considered to be important factors indicating the volume phase transition.

Studies on the Michael Addition Reaction between Secondary Amino Groups on the Silica Surface with Poly(ethylene glycol) Diacrylates (실리카 나노입자 표면에 결합된 2차 아미노기와 Poly(ethylene glycol) Diacrylate의 마이클 부가반응에 대한 연구)

  • Jeon, Ha Na;Ha, KiRyong
    • Polymer(Korea)
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    • v.36 no.6
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    • pp.822-830
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    • 2012
  • We used dipodal type bis[3-(trimethoxysilyl)propyl]amine (BTMA) silane coupling agent to modify silica nanoparticles to introduce secondary amino groups on the silica surface. These N-H groups were reacted with three different molecular weights (M.W. = 258, 575, and 700) of poly(ethylene glycol) diacrylates to introduce different attached layer thicknesses on the silica surface by Michael addition reaction. After Michael addition reaction, we used several analytical techniques such as fourier transform infrared spectroscopy (FTIR), elemental analysis (EA) and solid state $^{13}C$ cross-polarization magic angle spinning (CP/MAS) nuclear magnetic resonance spectroscopy to characterize introduced structures. We found almost complete Michael addition reaction of both two acrylate groups of PDGDA with N-H groups of BTMA modified silica to form ${\beta}$-amino acid esters. Between equimolar ratio of pure BTMA and pure PEGDA reaction, only one acrylate group of two acrylate groups of PEGDA reacted with N-H groups of pure BTMA to form ${\beta}$-amino acid ester and the other remaining acrylate group can be used to form a polymer later.

Electrochemical Characterization and Mechanical Properties of PEO-like Solid Polymer Electrolyte Based on Bisphenol A Ethoxylate Diacrylate (Bisphenol A ethoxylate diacrylate를 가교제로 사용한 PEO계 고분자 전해질의 전기화학적 특성 및 물성)

  • Kim, Seok-Koo;Kang, Yong-Ku;Rhee, Hee-Woo;Lee, Chang-Jin
    • Polymer(Korea)
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    • v.25 no.4
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    • pp.568-574
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    • 2001
  • PEO-like solid polymer electrolytes based on bisphenol A ethoxylate acrylate were synthesized and their electrochemical properties and mechanical stability were studied. Low molecular weight poly(ethylene glycol) dimethyl ether (PEGDMe) was added to increase the conductivity of the electrolyte. The maximum conductivity of the resulting polymer electrolyte was found to be 1.0 ${\times}$ 10$^{-3}$ S/cm [Bisphenol A ethoxylate diacrylate ([EO]/[phenol]= 15), PEGDMe250 80 wt%, LiCF$_3SO_3$] at 30$^{\circ}$C. Tensile strength of the free standing polymer electrolyte films was measured to be in the range of 0.4 ~ 5 MPa and these polymer electrolyte films did not show a crack even in 90$^{\circ}$ and 180$^{\circ}$ bending against ${\phi}$=3 mm bar. These electrolytes showed oxidation stability up to 4.5 V vs. lithium reference electrode.

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Photolithographic Fabrication of Poly(Ethylene Glycol) Microstructures for Hydrogel-based Microreactors and Spatially Addressed Microarrays

  • Baek, Taek-Jin;Kim, Nam-Hyun;Choo, Jae-Bum;Lee, Eun-Kyu;Seong, Gi-Hun
    • Journal of Microbiology and Biotechnology
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    • v.17 no.11
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    • pp.1826-1832
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    • 2007
  • We describe the fabrication of poly(ethylene glycol) diacrylate (PEG-DA) hydrogel microstructures with a high aspect ratio and the use of hydrogel microstructures containing the enzyme ${\beta}$-galactosidase (${\beta}$-Gal) or glucose oxidase (GOx)/horseradish peroxidase (HRP) as biosensing components for the simultaneous detection of multiple analytes. The diameters of the hydrogel microstructures were almost the same at the top and at the bottom, indicating that no differential curing occurred through the thickness of the hydrogel microstructure. Using the hydrogel microstructures as microreactors, ${\beta}$-Gal or GOx/HRP was trapped in the hydrogel array, and the time-dependent fluorescence intensities of the hydrogel array were investigated to determine the dynamic uptake of substrates into the PEG-DA hydrogel. The time required to reach steady-state fluorescence by glucose diffusing into the hydrogel and its enzymatic reactions with GOx and HRP was half the time required for resorufin ${\beta}$-D-galactopyranoside (RGB) when used as the substrate for ${\beta}$-Gal. Spatially addressed hydrogel microarrays containing different enzymes were micropatterned for the simultaneous detection of multiple analytes, and glucose and RGB solutions were incubated as substrates. These results indicate that there was no cross-talk between the ${\beta}$-Gal-immobilizing hydrogel micropatches and the GOx/HRP-immobilizing micropatches.

Synthesis of Electroactive PAAc/PVA/PEG Hydrogel Soft Actuator by Radiation Processing and Their Dynamic Characteristics (방사선을 이용한 전기 활성 PAAc/PVA/PEG 하이드로겔 소프트 액추에이터의 제조 및 구동 특성 분석)

  • Shin, Yerin;Kim, So Yeon
    • Applied Chemistry for Engineering
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    • v.30 no.6
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    • pp.698-706
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    • 2019
  • Over the last few decades, there have been a lot of efforts to develop soft actuators, which can be external stimuli-responsive and applied to the human body. In order to fabricate medical soft actuators with a dynamic precision control, the 3D crosslinked poly(acrylic acid) (PAAc)/poly(vinyl alcohol) (PVA)/poly(ethylene glycol) (PEG) hydrogels were synthesized in this study by using a radiation technique without noxious chemical additives or initiators. After irradiation, all hydrogels showed high gel fraction over 75% and the ATR-FTIR spectra indicated that PAAc/PVA/PEG hydrogels were successfully synthesized. In addition, the gel fraction, equilibrium water content, and compressive strength were measured to determine the change in physical properties of PAAc/PVA/PEG hydrogels according to the irradiation dose and content ratio of constituents. As the irradiation dose and amount of poly(ethylene glycol) diacrylate (PEGDA) increased, the PAAc/PVA/PEG hydrogels showed a high crosslinking density and mechanical strength. It was also confirmed that PAAc/PVA/PEG hydrogels responded to electrical stimulation even at a low voltage of 3 V. The bending behavior of hydrogels under an electric field can be controlled by changing the crosslinking density, ionic group content, applied voltage, and ionic strength of swelling solution.

The Effect of Crosslinker Type on Adhesion Properties of Transparent Acrylic Pressure Sensitive Adhesives for Optical Applications (가교제 변화에 따른 광학용 아크릴 점착제의 점착물성에 대한 연구)

  • Baek, Seung-Suk;Jang, Se-Jung;Hwang, Seok-Ho
    • Elastomers and Composites
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    • v.49 no.3
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    • pp.199-203
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    • 2014
  • Terpolymer syrups were photopolymerized from 2-ethylhexyl acrylate, 2-hydroxylethyl acrylate and isobornyl acrylate to prepare acrylic pressure sensitive adhesives (PSAs). After polymerization, various crosslinkers as 1,6-hexanediol diacrylate (HDDA), poly (ethylene glycol) diacrylate (PEGDA, Mn = 250, 575, and 700) were added and then UV-irradiated to prepare the semi-IPN type PSAs. Their adhesion performance and storage modulus (G') were strongly dependent on their chemical structure and molecular weight of the crosslinkers. Optical properties such as transmittance (> 92.5 %), haze (< 1.0 %) and color-difference (< 0.3) of PSAs samples were not affected by crosslinker types used in this study.

Preparation and Characterization of Biodegradable Hydrogels for Tissue Expander Application (조직 확장기용 생분해성 하이드로젤의 제조 및 특성분석)

  • Yuk, Kun-Young;Kim, Ye-Tae;Im, Su-Jin;Garner, John;Fu, Yourong;Park, Ki-Nam;Park, Jeong-Sook;Huh, Kang-Moo
    • Polymer(Korea)
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    • v.34 no.3
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    • pp.253-260
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    • 2010
  • In this study, we prepared and evaluated a series of biocompatible and biodegradable block copolymer hydrogels with a delayed swelling property for tissue expander application. The hydrogels were synthesized via a radical crosslinking reaction of poly(ethylene glycol) (PEG) diacrylate and poly(D,L-lactide-co-glycolide)-poly(ethylene glycol)-poly(D,L-lactide-co-glycolide)(PLGA-PEG-PLGA) triblock copolymer diacrylate as a swelling/degradation controller (SDC). For the synthesis of various SDCs that can lead to different degradation and swelling properties, various PLGA-PEG-PLGA triblock copolymers with different LA/GA ratios and different PLGA block lengths were synthesized and modified to have terminal acrylate groups. The resultant hydrogels were flexible and elastic even in the dry state. The in vitro degradation tests showed that the delayed swelling properties of the hydrogels could be modulated by varying the chemical composition of the biodegradable crosslinker (SDC) and the block ratio of SDC/PEG. The histopathologic observation after implantation of hydrogels in mice was performed and evaluated by macrography and microscopy. Any significant inflammation or necrosis was not observed in the implanted tissues. Due to their biocompatibility, elasticity, sufficient swelling pressure, delayed swelling and controllable degradability, the hydrogels could be useful for tissue expansion and other biomedical applications.

Synthesis, Properties and Permeation of Solutes through Hydrogels based on Poly(ethylene glycol)-co-Poly(lactones) diacrylate Macromers and Chitosan (UV 경화형 키토산/지방족 폴리에스터 Hydrogel IPN 제조 및 약물투과)

  • Cho, S.M.;Kim, S.Y.;Lee, Y.M.;Sung, Y.K.;Cho, C.S.
    • Proceedings of the KOSOMBE Conference
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    • v.1998 no.11
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    • pp.229-230
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    • 1998
  • Triblock copolymers from poly(ethylene glycol) (PEG) and D,L-lactide or $\varepsilon$-carprolactone were synthesized to prepare semi-interpenetrating polymer network (semi-IPN) with chitosan by U.V. irradiation method. Then, solute permeation through these semi-IPNs hydrogels were investigated. The structures of semi-IPNs were confirmed by FT-IR spectroscopy and wide angle X-ray diffractometer (WAXD). Equilibrium water content (EWC) of these hydrogels was in the range of 67-75%. The crystallinity, thermal properties and mechanical properties of semi-IPNs hydrogels were studied. All the hydrogels revealed a remarkable decrease in crystallinity as compared with PEG macromer itself. The tensile strengths of semi-IPNs hydrogels in dry state were rather high, but those of hydrogels in wet state decreased drastically. The permeabilities of solutes of hydrogels followed the swelling behaviors and were regulated by solute size.

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A Study on the Preparation and Characterization of Gel Polymer Electrolyte from Poly(ethylene glycol) Diacrylate in Sonic Liquid (폴리(에틸렌 글리콜) 디아크릴레이트/이온성 액체 젤형 고분자전해질의 제조 및 특성 연구)

  • Shin Bora;Cho Mi Suk;Kim Dukjoon;Sim Sang Jun;Kim Ji-Heung;Lee Dong Hyun;Nam Jae-Do;Lee Youngkwan
    • Polymer(Korea)
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    • v.29 no.2
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    • pp.216-220
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    • 2005
  • A new type of polymer gel electrolyte was prepared from poly(ethylene glycol) diacrylate(PEGDA) and 1-butyl-3-methylimidazolium bis((trifluorornethyl) sulfonyl) amide$(BuMeIm^+Tf_2N^-)$ ionic liquid. The effect of the ionic liquid on ionic conductivity of the gel polymer electrolyte was investigated. It was observed that the gel polymer electrolyte having the ionic liquid exhibited higher ionic conductivity $(ca.\;10^{-3}S/cm)$ as well as electrochemical stability than that using organic solvent.