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Journal articles on the topic 'Poly(vinyl amine-co-vinyl amide) (PVAm)'

Author: Grafiati
Published: 4 June 2021
Last updated: 4 February 2022

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1

Seifert, Susan, Frank Simon, Giesela Baumann, Michael Hietschold, Andreas Seifert, and Stefan Spange. "Adsorption of Poly(vinyl formamide-co-vinyl amine) (PVFA-co-PVAm) Polymers on Zinc, Zinc Oxide, Iron, and Iron Oxide Surfaces." Langmuir 27, no. 23 (2011): 14279–89. http://dx.doi.org/10.1021/la203479n.

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2

Ashtiani, Saeed, Mehdi Khoshnamvand, Chhabilal Regmi, and Karel Friess. "Interfacial Design of Mixed Matrix Membranes via Grafting PVA on UiO-66-NH2 to Enhance the Gas Separation Performance." Membranes 11, no. 6 (2021): 419. http://dx.doi.org/10.3390/membranes11060419.

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In this study, defect-free facilitated transport mixed matrix membrane (MMM) with high loading amount of UiO-66-NH2 nanoparticles as metal–organic frameworks (MOFs) was fabricated. The MOFs were covalently bonded with poly (vinyl alcohol) (PVA) to incorporate into a poly (vinyl amine) (PVAm) matrix solution. A uniform UiO-66-NH2 dispersion up to 55 wt.% was observed without precipitation and agglomeration after one month. This can be attributed to the high covalent interaction at interfaces of UiO-66-NH2 and PVAm, which was provided by PVA as a functionalized organic linker. The CO2 permeabili
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3

Wittke, Ralph, Dierk Knittel, Robert Kaufmann, and Eckhard Schollmeyer. "Modification of Poly(ethylene terephthalate) Surfaces by Linear Poly(vinyl amine)." Zeitschrift für Naturforschung A 64, no. 9-10 (2009): 653–57. http://dx.doi.org/10.1515/zna-2009-9-1018.

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The feasibility of fixing linear poly(vinyl amine) (PVAm) onto the surface of a poly(ethylene terephthalate) (PET) foil is shown. Pretreatment of the PET foil for PVAm anchoring is UV irradiation generated by an excimer lamp (λ = 222 nm). Thereby newly formed COOH-groups are able to build up in situ an ionic double layer with PVAm by proton transfer. The properties of the modified PET foil like wetting performance and electric conductivity are significantly improved by this treatment.
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4

Sansatsadeekul, Jitlada, and Katanchalee Mai-Ngam. "Reversible Self-Assembling of Comb-Like Functionalized Dextran Surfactant Polymers as an SPR-Sensing Surfaces." Advanced Materials Research 747 (August 2013): 225–29. http://dx.doi.org/10.4028/www.scientific.net/amr.747.225.

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Novel surface plasmon resonance (SPR) sensing surfaces were developed from the perspective of reversible self-assembling of the mixed dextran surfactant polymers onto SPR gold chips. Two comb-like dextran surfactant polymers, which are different in their dextran molecular weight (MW) distribution and the presence of amine functional groups, and their characterization were synthesized. These structurally well-defined surfactant polymers include a bimodal amine dextran surfactant polymer and a monomodal dextran surfactant polymer. The bimodal one consists of poly (vinyl amine) (PVAm) backbone wi
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5

Schulze, Katja, Annette Koch, Alke Petri-Fink, et al. "Uptake and Biocompatibility of Functionalized Poly(vinylalcohol) Coated Superparamagnetic Maghemite Nanoparticles by Synoviocytes In Vitro." Journal of Nanoscience and Nanotechnology 6, no. 9 (2006): 2829–40. http://dx.doi.org/10.1166/jnn.2006.484.

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Superparamagnetic iron oxide nanoparticles (SPION) were coated with either Polyvinyl alcohol (PVA) or Vinyl alcohol/vinyl amine copolymer and further functionalized with the fluorochromes Cy3.5 or Texas Red. A colloidally stable suspension of nanoparticles was incubated on sheep synovial cells in vitro for 3, 24, 72, and 120 hours. Nanoparticle internalization into synoviocytes as well as biocompatibility was visualized using light, fluorescence and confocal microscopy and fluorochrome labeled cells were quantified by flow cytometry. Data were analyzed by ANOVA factorial tests. Amino-PVA-SPION
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6

Shu, Xiaobo, Liping Wan, and Mubai Duan. "Persistent inhibition performance of amine polymers to inhibit clay swelling." Journal of Polymer Engineering 38, no. 4 (2018): 323–31. http://dx.doi.org/10.1515/polyeng-2016-0428.

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AbstractClay hydration and swelling can cause shale instability in the drilling of oil and gas wells. The persistent inhibition performance of polyether amine (PEA) and poly(vinyl alcohol-g-dimethyl aminopropyl methacrylamide) (PVA-g-DMAPMA) as amine clay inhibitors has been investigated through hot rolling dispersion test, bulk hardness test, and bentonite inhibition test. The micro-mechanism has also been explained by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), scanning electron microscope (SEM), and X-ray diffraction (XRD) analyses. Through the interact
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7

Hassan, Mohammad, Ahmed Abukmail, Alaa Hassiba, Kenneth Mauritz, and Ahmed Elzatahry. "PVA/Chitosan/Silver Nanoparticles Electrospun Nanocomposites: Molecular Relaxations Investigated by Modern Broadband Dielectric Spectroscopy." Nanomaterials 8, no. 11 (2018): 888. http://dx.doi.org/10.3390/nano8110888.

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In this study, we used broadband dielectric spectroscopy to analyze polymer nanofibers of poly(vinyl alcohol)/chitosan/silver nanoparticles. We also studied the effect of incorporating silver nanoparticles in the polymeric mat, on the chain motion dynamics and their interactions with chitosan nanofibers, and we calculated the activation energies of the sub-Tg relaxation processes. Results revealed the existence of two sub-Tg relaxations, the first gets activated at very low temperature (−90 °C) and accounts for motions of the side groups within the repeating unit such as –NH2, –OH, and –CH2OH
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8

Hellstern, Daniel, Katja Schulze, Bernhard Schöpf, et al. "Systemic Distribution and Elimination of Plain and with Cy3.5 Functionalized Poly(vinyl alcohol) Coated Superparamagnetic Maghemite Nanoparticles After Intraarticular Injection in Sheep In Vivo." Journal of Nanoscience and Nanotechnology 6, no. 9 (2006): 3261–68. http://dx.doi.org/10.1166/jnn.2006.482.

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PVA coated and fluorescent dye (Cy3.5) functionalized vinyl alcohol/vinyl amine copolymer coated superparamagnetic iron oxide nanoparticles (SPION) were evaluated for systemic distribution and elimination after intraarticular injection in sheep. Observation was done at 3, 24, 72, and 120 hours after injection using light microscopy, fluorescent microscopy, and confocal microscopy. No pathologic influence of SPION on the tissue harvested could be seen. A significantly increased iron content could be identified in the kidneys, lymph nodes, and spleen after injection of SPION. No particles were d
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9

Sutekin, Semiha Duygu, Mehtap Sahiner, Selin Sagbas Suner, Sahin Demirci, Olgun Güven, and Nurettin Sahiner. "Poly(Vinylamine) Derived N-Doped C-Dots with Antimicrobial and Antibiofilm Activities." C 7, no. 2 (2021): 40. http://dx.doi.org/10.3390/c7020040.

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Nitrogen-doped carbon dots (N-doped C-dots) was synthesized by using poly(vinyl amine) (PVAm) as a nitrogen source and citric acid (CA) as a carbon source via the hydrothermal method. Various weight ratios of CA and PVAm (CA:PVAm) were used to synthesize N-doped C-dots. The N-doped C-dots revealed emission at 440 nm with excitation at 360 nm and were found to increase the fluorescence intensity with an increase in the amount of PVAm. The blood compatibility studies revealed no significant hemolysis for N-doped C-dots that were prepared at different ratios of CA:PVAm for up to 500 μg/mL concent
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10

Arikibe, Joachim Emeka, Roselyn Lata, and David Rohindra. "Synthesis, Preparation and Characterization of Amine-Induced Bacterial Cellulose-Poly(Vinyl Alcohol) Semi-Interpenetrating Network Hydrogel." Key Engineering Materials 841 (May 2020): 238–42. http://dx.doi.org/10.4028/www.scientific.net/kem.841.238.

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Bacterial cellulose (BC) was synthesized using Gluconacetobacter xylinus (BCRC 14182). Synthesized BC was powdered and dissolved in Bis(ethylenediamine) copper (II) hydroxide (Cuen) solution to introduce the amine (NH2) group onto the BC network to yield modified BC (mBC) which was then blended with poly (vinyl alcohol) (PVA) and subsequently crosslinked with genipin (Gp). Pristine, modified and crosslinked hydrogels were studied using Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM) and swelling behavior in water. FTIR revealed a distortion on the BC network
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11

Setayeshmehr, Mohsen, Shahzad Hafeez, Clemens van Blitterswijk, Lorenzo Moroni, Carlos Mota, and Matthew B. Baker. "Bioprinting Via a Dual-Gel Bioink Based on Poly(Vinyl Alcohol) and Solubilized Extracellular Matrix towards Cartilage Engineering." International Journal of Molecular Sciences 22, no. 8 (2021): 3901. http://dx.doi.org/10.3390/ijms22083901.

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Various hydrogel systems have been developed as biomaterial inks for bioprinting, including natural and synthetic polymers. However, the available biomaterial inks, which allow printability, cell viability, and user-defined customization, remains limited. Incorporation of biological extracellular matrix materials into tunable synthetic polymers can merge the benefits of both systems towards versatile materials for biofabrication. The aim of this study was to develop novel, cell compatible dual-component biomaterial inks and bioinks based on poly(vinyl alcohol) (PVA) and solubilized decellulari
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12

Mazlan, Siti Zulaikha, Faszly Rahim, and Sharina Abu Hanifah. "Facile Synthesis of Magnetic Copolymer Microspheres Based on Poly(glycidyl methacrylate-co-N-isopropylacrylamide)/Fe3O4by Suspension Photopolymerization." International Journal of Polymer Science 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/591898.

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Magnetic copolymer based on poly(glycidyl methacrylate-co-N-isopropylacrylamide) microspheres was prepared by 2,2-dimethoxy-2-phenylacetophenone- (DMPP-) photo initiated and poly(vinyl alcohol)- (PVA-) stabilized single step suspension photopolymerization. The effect of chemical interaction, morphology, and thermal properties by adding 0.1% w/v Fe3O4in the copolymer was investigated. Infrared analysis (FTIR) showed that (C=C) band disappeared after copolymerization, indicating that the magnetic copolymer microspheres were successfully synthesized and two important bands at 908 cm−1and 1550 cm−
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13

Zhang, Peng, Jie Yin, and Xuesong Jiang. "Hyperbranched Poly(ether amine) (hPEA)/Poly(vinyl alcohol) (PVA) Interpenetrating Network (IPN) for Selective Adsorption and Separation of Guest Homologues." Langmuir 30, no. 48 (2014): 14597–605. http://dx.doi.org/10.1021/la502869n.

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14

Deng, Shujun, Hongjie Xu, Xuesong Jiang, and Jie Yin. "Poly(vinyl alcohol) (PVA)-Enhanced Hybrid Hydrogels of Hyperbranched Poly(ether amine) (hPEA) for Selective Adsorption and Separation of Dyes." Macromolecules 46, no. 6 (2013): 2399–406. http://dx.doi.org/10.1021/ma302330w.

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15

Ceja, Israel, Karla Josefina González-Íñiguez, Alejandra Carreón-Álvarez, et al. "Characterization and Electrical Properties of PVA Films with Self-Assembled Chitosan-AuNPs/SWCNT-COOH Nanostructures." Materials 13, no. 18 (2020): 4138. http://dx.doi.org/10.3390/ma13184138.

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Nanostructured films with electrical conductivity in the semiconductor region were prepared in a polymeric matrix of poly(vinyl alcohol) (PVA) with nanostructures of chitosan-gold nanoparticles (AuNPs)/single-wall carbon nanotubes carboxylic acid functionalized (SWCNT-COOH) (chitosan-AuNPs/SWCNT-COOH) self-assembled. Dispersion light scattering (DLS) was used to determine the average particle sizes of chitosan-AuNPs, z-average particle size (Dz) and number average particle size (Dn), and the formation of crystalline domains of AuNPs was demonstrated by X-ray diffraction (XRD) patterns and obse
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16

Imtiaz, Naila, Muhammad Bilal Khan Niazi, Fehmida Fasim, et al. "Fabrication of an Original Transparent PVA/Gelatin Hydrogel: In Vitro Antimicrobial Activity against Skin Pathogens." International Journal of Polymer Science 2019 (March 14, 2019): 1–11. http://dx.doi.org/10.1155/2019/7651810.

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The design of actively efficient and low-toxicity formulations against virulent bacterial strains causing skin infections remains a challenging task. The aim of the present study was to develop and evaluate in vitro a hydrogel impregnated with a known plant extract for topical applications against major skin bacteria. A poly(vinyl alcohol) (PVA)/gelatin hydrogel, namely HG, was prepared by esterification following the solution casting method. The gelling process was realized by cross-linking the synthetic polymer PVA and the biopolymer gelatin in the presence of hydrochloric acid (HCl). A crud
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17

Kanhegaokar, Shivkalyan A. "Charge transport and conductivity measurement in polyaniline-poly(vinyl acetate) blends." e-Polymers 7, no. 1 (2007). http://dx.doi.org/10.1515/epoly.2007.7.1.756.

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AbstractPoly(vinyl acetate) (PVAc) is used extensively in coatings, adhesives and films. The carbonyl group (C=O) in the structure of PVAc forms hydrogen bonding with amine and hydroxyl groups and this may also enhance miscibility with polyaniline. Hence, PVAc has been chosen for blending with PANI. Further, PVAc can be used in moisture sensors and after blending with PANI its conductivity would be in semi conducting range with moisture response, which will be suitable for easy measurement. It was expected that, the given blend may give higher conductivity because 1) PVAc and PANI solubility p
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18

Hofmann, Katja, Ingolf Kahle, Frank Simon, and Stefan Spange. "Chromo- and fluorophoric water-soluble polymers and silica particles by nucleophilic substitution reaction of poly(vinyl amine)." Beilstein Journal of Organic Chemistry 6 (July 22, 2010). http://dx.doi.org/10.3762/bjoc.6.79.

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Novel chromophoric and fluorescent carbonitrile-functionalized poly(vinyl amine) (PVAm) and PVAm/silica particles were synthesized by means of nucleophilic aromatic substitution of 8-oxo-8H-acenaphtho[1,2-b]pyrrol-9-carbonitrile (1) with PVAm in water. The water solubility of 1 has been mediated by 2,6-O-β-dimethylcyclodextrin or by pre-adsorption onto silica particles. Furthermore, 1 was converted with isopropylamine into the model compound 1-M. All new compounds were characterized by NMR, FTIR, UV–vis and fluorescence spectroscopy. The solvent-dependent UV–vis absorption and fluorescence emi
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