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Immobilization of Polymeric Luminophor on Nanoparticles Surface.

Bolbukh Y, Podkoscielna B, Lipke A, Bartnicki A, Gawdzik B, Tertykh V - Nanoscale Res Lett (2016)

Bottom Line: Obtained results confirm the chemisorption of luminophor on the nanotubes and silica nanoparticles at the elaborated synthesis techniques.The microstructure of 2,7-NAF.DM molecules after chemisorption was found to be not changed.The elaborated modification approach allows one to obtain nanoparticles uniformly covered with polymeric luminophor.

View Article: PubMed Central - PubMed

Affiliation: Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine. yu_bolbukh@yahoo.com.

ABSTRACT
Polymeric luminophors with reduced toxicity are of the priorities in the production of lighting devices, sensors, detectors, bioassays or diagnostic systems. The aim of this study was to develop a method of immobilization of the new luminophor on a surface of nanoparticles and investigation of the structure of the grafted layer. Monomer 2,7-(2-hydroxy-3-methacryloyloxypropoxy)naphthalene (2,7-NAF.DM) with luminophoric properties was immobilized on silica and carbon nanotubes in two ways: mechanical mixing with previously obtained polymer and by in situ oligomerization with chemisorption after carrier's modification with vinyl groups. The attached polymeric (or oligomeric) surface layer was studied using thermal and spectral techniques. Obtained results confirm the chemisorption of luminophor on the nanotubes and silica nanoparticles at the elaborated synthesis techniques. The microstructure of 2,7-NAF.DM molecules after chemisorption was found to be not changed. The elaborated modification approach allows one to obtain nanoparticles uniformly covered with polymeric luminophor.

No MeSH data available.


Related in: MedlinePlus

Thermal stability of raw materials and composites. a Differential mass loss curves (DTG). b DTA curves. c TG, DTG and DSC curves (artificial air). d DSC curves (nitrogen). The curves are marked as materials represented in Table 1. 2 The polymer 2,7-NAF.DM; 5 the mechanical mixture of carbon nanotubes with the poly2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 6 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 7 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:40; black line indicates the neat MWCNTs (c, d); grey line indicates the vinylated MWCNTs (d) that were obtained by liquid-phase modification with the vinyl trialkoxysilane
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Fig3: Thermal stability of raw materials and composites. a Differential mass loss curves (DTG). b DTA curves. c TG, DTG and DSC curves (artificial air). d DSC curves (nitrogen). The curves are marked as materials represented in Table 1. 2 The polymer 2,7-NAF.DM; 5 the mechanical mixture of carbon nanotubes with the poly2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 6 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 7 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:40; black line indicates the neat MWCNTs (c, d); grey line indicates the vinylated MWCNTs (d) that were obtained by liquid-phase modification with the vinyl trialkoxysilane

Mentions: The thermooxidation process of polymer mechanically milled with modified VTES carbon nanotubes (Table 1, sample 5) occurs in three stages with maxima of weight loss rates at 223, 340 and 404 °C with total mass loss of 96 % (Fig. 3a). It should be noted that for oxidized nanotubes, the starting decomposition temperature is 470 °C and the total mass loss is 99 % [29]. After nanotubes modification with silanes, the total mass loss was close to 96–98 % (Fig. 3c). A low content of a residual pitch after thermooxidation of modified with silane nanotubes was due to relatively low temperature of siloxane chains and attached silane oligomer degradation that occurs at temperatures below the nanotubes’ structural benzene ring destruction (closely to 250–320 °C) [30].Fig. 3


Immobilization of Polymeric Luminophor on Nanoparticles Surface.

Bolbukh Y, Podkoscielna B, Lipke A, Bartnicki A, Gawdzik B, Tertykh V - Nanoscale Res Lett (2016)

Thermal stability of raw materials and composites. a Differential mass loss curves (DTG). b DTA curves. c TG, DTG and DSC curves (artificial air). d DSC curves (nitrogen). The curves are marked as materials represented in Table 1. 2 The polymer 2,7-NAF.DM; 5 the mechanical mixture of carbon nanotubes with the poly2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 6 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 7 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:40; black line indicates the neat MWCNTs (c, d); grey line indicates the vinylated MWCNTs (d) that were obtained by liquid-phase modification with the vinyl trialkoxysilane
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835396&req=5

Fig3: Thermal stability of raw materials and composites. a Differential mass loss curves (DTG). b DTA curves. c TG, DTG and DSC curves (artificial air). d DSC curves (nitrogen). The curves are marked as materials represented in Table 1. 2 The polymer 2,7-NAF.DM; 5 the mechanical mixture of carbon nanotubes with the poly2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 6 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:10; 7 carbon nanotubes with the polymeric layer obtained via in situ grafted polymerization of the monomer 2,7-NAF.DM. The MWCNTs/polymer ratio was 1:40; black line indicates the neat MWCNTs (c, d); grey line indicates the vinylated MWCNTs (d) that were obtained by liquid-phase modification with the vinyl trialkoxysilane
Mentions: The thermooxidation process of polymer mechanically milled with modified VTES carbon nanotubes (Table 1, sample 5) occurs in three stages with maxima of weight loss rates at 223, 340 and 404 °C with total mass loss of 96 % (Fig. 3a). It should be noted that for oxidized nanotubes, the starting decomposition temperature is 470 °C and the total mass loss is 99 % [29]. After nanotubes modification with silanes, the total mass loss was close to 96–98 % (Fig. 3c). A low content of a residual pitch after thermooxidation of modified with silane nanotubes was due to relatively low temperature of siloxane chains and attached silane oligomer degradation that occurs at temperatures below the nanotubes’ structural benzene ring destruction (closely to 250–320 °C) [30].Fig. 3

Bottom Line: Obtained results confirm the chemisorption of luminophor on the nanotubes and silica nanoparticles at the elaborated synthesis techniques.The microstructure of 2,7-NAF.DM molecules after chemisorption was found to be not changed.The elaborated modification approach allows one to obtain nanoparticles uniformly covered with polymeric luminophor.

View Article: PubMed Central - PubMed

Affiliation: Chuiko Institute of Surface Chemistry of National Academy of Sciences of Ukraine, 17 General Naumov Str., 03164, Kyiv, Ukraine. yu_bolbukh@yahoo.com.

ABSTRACT
Polymeric luminophors with reduced toxicity are of the priorities in the production of lighting devices, sensors, detectors, bioassays or diagnostic systems. The aim of this study was to develop a method of immobilization of the new luminophor on a surface of nanoparticles and investigation of the structure of the grafted layer. Monomer 2,7-(2-hydroxy-3-methacryloyloxypropoxy)naphthalene (2,7-NAF.DM) with luminophoric properties was immobilized on silica and carbon nanotubes in two ways: mechanical mixing with previously obtained polymer and by in situ oligomerization with chemisorption after carrier's modification with vinyl groups. The attached polymeric (or oligomeric) surface layer was studied using thermal and spectral techniques. Obtained results confirm the chemisorption of luminophor on the nanotubes and silica nanoparticles at the elaborated synthesis techniques. The microstructure of 2,7-NAF.DM molecules after chemisorption was found to be not changed. The elaborated modification approach allows one to obtain nanoparticles uniformly covered with polymeric luminophor.

No MeSH data available.


Related in: MedlinePlus