Silver nanoparticles stabilized by crosslinked poly(vinyl pyrrolidone) and its application for facilitated olefin transport

Kang, Sang Wook; Kang, Yong Soo

doi:10.1016/j.jcis.2010.09.033

Cited by 26 publications

(21 citation statements)

References 17 publications

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“…In the present work, PVP was selected as polymeric surfactant. Capping the surface of nanoparticles with PVP during chemical synthesis in order to ensure colloidal stability and prevent the aggregation is a well‐known technique used for synthesis of CdS, Cu, Ag, and many other nanoparticles. Therefore, performing the reduction of GO in the presence of PVP was expected to be more effective way of rGO stabilization.…”

Section: Resultsmentioning

confidence: 99%

Comparison of the Emulsion Mixing and In Situ Polymerization Techniques for Synthesis of Water‐Borne Reduced Graphene Oxide/Polymer Composites: Advantages and Drawbacks

Arzac

Leal

Fajgаr

2014

Part & Part Syst Charact

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Water‐borne reduced graphene oxide (rGO)/polymer composites have been synthesized by emulsion mixing and in situ polymerization. The main challenge is to synthesize colloidally stable hybrid latexes that are able to produce composite films by water evaporation at standard atmospheric conditions for their possible application as electrically conductive coatings. The selected polymer system is composed from poly(methyl metacrylate/butyl acrylate) in 50/50 wt% ratio in order to obtain glass transition temperature of the final film lower than the room temperature. The polymer is joined with rGO stable dispersions, which are prepared by reduction of GO in the presence of polyvynil pyrrolidone (PVP). The latex blends are composed of weakly bonded rGO platelets with polymer particles by the presence of PVP, whereas the covalent bonds between the polymers and the rGO in the in situ hybrid latexes are established. Both procedures result in stable hybrid latexes, from which layered composites are obtained by slow water evaporation. The composite blends present better self‐organization of rGO, tendency of segregated network formation, and electrically conductive properties. The in situ composites present decreased aggregation of rGO, uniformly distributed rGO in the polymeric matrix and lower conductivity.

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Section: Resultsmentioning

confidence: 99%

Comparison of the Emulsion Mixing and In Situ Polymerization Techniques for Synthesis of Water‐Borne Reduced Graphene Oxide/Polymer Composites: Advantages and Drawbacks

Arzac

Leal

Fajgаr

2014

Part & Part Syst Charact

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“…These clusters are very small in size and have extremely high surface energy, which drives them to aggregate into larger particles. In many cases, a surfactant is added into the synthesis system to stabilize these nanoparticles and prevent them from further aggregating [1,15,23,24]. Intriguingly, the reduction reaction in this experiment occurred in the nylon 6 solution.…”

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confidence: 92%

Nylon 6–Gold Nanoparticle Composite Fibers for Colorimetric Detection of Urinary 1-Hydroxypyrene

2015

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A one-step in situ synthesis of nylon 6 nanofi bers fi lled with gold nanoparticles for the colorimetric probe of 1-hydroxypyrene, a biomarker associated with the largest class of cancer-causing chemical compounds polycyclic aromatic hydrocarbons (PAHs) is proposed in this study. The gold nanoparticles (AuNPs) were successfully embedded on the surface of the nylon 6 fi bers where the gold particles were chemisorbed onto the amide groups in the nylon 6 backbones. By electrospinning the nylon 6/gold nanocomposite, the gold nanoparticles were uniformly dispersed on the polymer fi bers to give a photostable reddish white fi ber which turned purple/blue when brought in contact with a standard solution of the biomarker. The TEM revealed the formation of spherical AuNPs with an average diameter of 8 nm well arrayed within the nanofi bers, but no signifi cant change in the morphology of the nanofi bers was observed. The thermal properties of the composite fi bers were greatly improved compared to the electrospun nylon 6 fi ber. The developed method described herein is simple, effective, requires no post-treatments, and is highly sensitive (100 ng/ ml) hence the nanocomposite fi bers can be employed as a test strip for the colorimetric detection of 1-hydroxypyrene in human urine or other diagnostic probe biosensors.Introduction. Metal nanoparticles are of great scientifi c interest as they are effectively a bridge between bulk materials and atomic/molecular structures. Nanoparticles often have unexpected visible properties because they are small enough to confi ne their electrons and produce quantum confi nement effect [1][2][3][4]. Their high surface activity and freely moving electrons can bring about the enhanced Raman scattering effect and agglomeration [1,[5][6][7][8]. The high surface area to volume ratio reduces their incipient melting temperature. They often possess high molar extinction values, which makes them far more sensitive and stable than other conventional colorimetric probes [2]. A prominent spectroscopic feature of the noble metal nanoparticles is surface plasmon resonance (SPR), which arises from the collective resonance oscillations of the free electrons of the conduction band of the metal and often gives rise to a sharp and intense absorption band in the visible range [5,[9][10][11][12]. A combination of these unique properties makes the metal nanoparticles highly promising as the ultimate miniature devices with potential applications in optometrics [1,2,5,13], sensing (biological colorimetric probes) [2, 13-16], catalysis [14,15], labeling, pharmacy (controlled drug release, therapeutic) and modern medicine [2,[14][15][16][17].A gold nanoparticle (AuNP) is one of the few metal nanoparticles that are increasingly drawing huge scientifi c attention as colorimetric probes due to their unique physical and chemical properties. Beside the numerous applications of the AuNPs in catalysis, diagnostics (biomarkers), photo thermal cancer therapy, antibacterials, biology [17][18][19][20], they exhibit an observ...

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“…Among these fields, the membrane method using the facilitated transport concept has been increasingly utilized. [10,[20][21][22]. Ag ions could coordinate reversibly with olefins such as propylene and were known as an effective olefin carrier [23,24].…”

Section: Introductionmentioning

confidence: 99%

Correlation between Functional Group and Formation of Nanoparticles in PEBAX/Ag Salt/Al Salt Complexes for Olefin Separation

2020

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poly ether-block-amide (PEBAX)-2533/metal salt/Al salt membranes were prepared for mixed olefin/paraffin separation. PEBAX-2533 with 80% ether group and 20% amide group was suggested as the polymer matrix for comparison of separation performance according to the functional group ratio in copolymer PEBAX. In addition, Al salts were used to stabilize metal ions for a long time as additives. High permeance was expected with the proportion of high ether groups, since these functional groups provided relatively permeable regions. As a result, the PEBAX-2533 composite membrane showed a selectivity of 5 (propylene/propane) with 10 GPU. However, the permeance of membrane was not unexpectedly improved and the selectivity was reduced. The result was analyzed by using SEM, RAMAN and thermogravimetric analysis (TGA), including Fourier transform infrared (FTIR). The reduction in separation performance was determined by using FT-IR. Based on these results, in order to stabilize the metal ions interacting with the polymer through Al(NO 3 ) 3 , it was concluded that a specific ratio of the amide group was needed in PEBAX as a polymer matrix.

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Silver nanoparticles stabilized by crosslinked poly(vinyl pyrrolidone) and its application for facilitated olefin transport

Cited by 26 publications

References 17 publications

Comparison of the Emulsion Mixing and In Situ Polymerization Techniques for Synthesis of Water‐Borne Reduced Graphene Oxide/Polymer Composites: Advantages and Drawbacks

Comparison of the Emulsion Mixing and In Situ Polymerization Techniques for Synthesis of Water‐Borne Reduced Graphene Oxide/Polymer Composites: Advantages and Drawbacks

Nylon 6–Gold Nanoparticle Composite Fibers for Colorimetric Detection of Urinary 1-Hydroxypyrene

Correlation between Functional Group and Formation of Nanoparticles in PEBAX/Ag Salt/Al Salt Complexes for Olefin Separation

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