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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 Mass loss curves. b Differential mass loss curves. c DTA curves. 1 The silica modified with vinyl trialkoxysilane; 2 the polymer 2,7-NAF.DM; 3 the mechanical mixture of the vinylated silica and the poly2,7-NAF.DM with the silica/polymer ratio 2:1 (sample 3 in Table 1); 4 the silica with chemisorbed polymeric layer obtained via in situ grafted polymerization of monomer 2,7-NAF.DM on the vinylated silica surface. Polymerization was carried out in toluene solution of the monomer in the presence of the dispersed silica and was initiated by AIBN during sonication with following heating at 80 °C for 24 h. The silica/polymer ratio in the composite was 2:1 (sample 4 in Table 1)
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Fig1: Thermal stability of raw materials and composites. a Mass loss curves. b Differential mass loss curves. c DTA curves. 1 The silica modified with vinyl trialkoxysilane; 2 the polymer 2,7-NAF.DM; 3 the mechanical mixture of the vinylated silica and the poly2,7-NAF.DM with the silica/polymer ratio 2:1 (sample 3 in Table 1); 4 the silica with chemisorbed polymeric layer obtained via in situ grafted polymerization of monomer 2,7-NAF.DM on the vinylated silica surface. Polymerization was carried out in toluene solution of the monomer in the presence of the dispersed silica and was initiated by AIBN during sonication with following heating at 80 °C for 24 h. The silica/polymer ratio in the composite was 2:1 (sample 4 in Table 1)

Mentions: The polymer thermal decomposition goes through three mass loss stages with the total weight loss of 99 % (Fig. 1a). The first stage at 90–150 °C corresponded to solvent removal; the second stage at 150–300 °C was attributed to decomposition of terminal groups and ungrafted monomer evaporation; and the stage at 300–450 °C is coursed by main chain and benzene ring decomposition (Fig. 1b) [25–27]. The modified VTES silica has the total mass loss of 16 %. Decomposition process consists of a residual solvent removal (98 °C), alkoxy group and terminal vinyl group thermal oxidative destruction (130–250 °C) and degradation of the attached organosilicon layer (250–350 °C) (Fig. 1a, b).Fig. 1


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 Mass loss curves. b Differential mass loss curves. c DTA curves. 1 The silica modified with vinyl trialkoxysilane; 2 the polymer 2,7-NAF.DM; 3 the mechanical mixture of the vinylated silica and the poly2,7-NAF.DM with the silica/polymer ratio 2:1 (sample 3 in Table 1); 4 the silica with chemisorbed polymeric layer obtained via in situ grafted polymerization of monomer 2,7-NAF.DM on the vinylated silica surface. Polymerization was carried out in toluene solution of the monomer in the presence of the dispersed silica and was initiated by AIBN during sonication with following heating at 80 °C for 24 h. The silica/polymer ratio in the composite was 2:1 (sample 4 in Table 1)
© Copyright Policy - OpenAccess
Related In: Results  -  Collection

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

Fig1: Thermal stability of raw materials and composites. a Mass loss curves. b Differential mass loss curves. c DTA curves. 1 The silica modified with vinyl trialkoxysilane; 2 the polymer 2,7-NAF.DM; 3 the mechanical mixture of the vinylated silica and the poly2,7-NAF.DM with the silica/polymer ratio 2:1 (sample 3 in Table 1); 4 the silica with chemisorbed polymeric layer obtained via in situ grafted polymerization of monomer 2,7-NAF.DM on the vinylated silica surface. Polymerization was carried out in toluene solution of the monomer in the presence of the dispersed silica and was initiated by AIBN during sonication with following heating at 80 °C for 24 h. The silica/polymer ratio in the composite was 2:1 (sample 4 in Table 1)
Mentions: The polymer thermal decomposition goes through three mass loss stages with the total weight loss of 99 % (Fig. 1a). The first stage at 90–150 °C corresponded to solvent removal; the second stage at 150–300 °C was attributed to decomposition of terminal groups and ungrafted monomer evaporation; and the stage at 300–450 °C is coursed by main chain and benzene ring decomposition (Fig. 1b) [25–27]. The modified VTES silica has the total mass loss of 16 %. Decomposition process consists of a residual solvent removal (98 °C), alkoxy group and terminal vinyl group thermal oxidative destruction (130–250 °C) and degradation of the attached organosilicon layer (250–350 °C) (Fig. 1a, b).Fig. 1

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