scholarly journals Effect of Silica Nanoparticles on the Local Segmental Dynamics in Polyvinylacetate

2008 ◽  
Author(s):  
R. B. Bogoslovov ◽  
C. M. Roland ◽  
A. R. Ellis ◽  
A. M. Randall ◽  
C. G. Robertson ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Segmental Dynamics

scholarly journals Calorimetric and Dielectric Study of Renewable Poly(hexylene 2,5-furan-dicarboxylate)-Based Nanocomposites In Situ Filled with Small Amounts of Graphene Platelets and Silica Nanoparticles

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1239 ◽  
Author(s):  
Olawale Monsur Sanusi ◽  
Lazaros Papadopoulos ◽  
Panagiotis A. Klonos ◽  
Zoi Terzopoulou ◽  
Nourredine Aït Hocine ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Food Packaging ◽  
Dielectric Study ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Gas Barrier ◽  
Segmental Dynamics ◽  
Fumed Silica Nanoparticles ◽  
Strongly Connected

Poly(hexylene 2,5 furan-dicarboxylate) (PHF) is a relatively new biobased polyester prepared from renewable resources, which is targeted for use in food packaging applications, owing to its great mechanical and gas barrier performance. Since both properties are strongly connected to crystallinity, the latter is enhanced here by the in situ introduction in PHF of graphene nanoplatelets and fumed silica nanoparticles, as well as mixtures of both, at low amounts. For this investigation, we employed Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), X-ray diffraction (XRD) and dielectric spectroscopy (BDS). The fillers were found to improve crystallization in both the rate (increasing Tc) and fraction (CF), which was rationalized via the concept of fillers acting as crystallization agents. This action was found stronger in the case of graphene as compared to silica. BDS allowed the detection of local and segmental dynamics, in particular in PHF for the first time. The glass transition dynamics in both BDS (α relaxation) and DSC (Tg) are mainly dominated by the relatively high CF, whereas in the PHF filled uniquely with silica strong spatial confinement effects due to crystals were revealed. Finally, all samples demonstrated the segmental-like dynamics above Tg, which screens the global chain dynamics (normal mode).

scholarly journals Effect of Silica Nanoparticles on the Local Segmental Dynamics in Poly(vinyl acetate)

2008 ◽  
Vol 41 (4) ◽  
pp. 1289-1296 ◽  
Author(s):  
R. B. Bogoslovov ◽  
C. M. Roland ◽  
A. R. Ellis ◽  
A. M. Randall ◽  
C. G. Robertson
Keyword(s):  
Silica Nanoparticles ◽  
Vinyl Acetate ◽  
Segmental Dynamics

Microscopy study on the interaction of silica nanoparticles with lung epithelial cells

Pneumologie ◽  
2013 ◽  
Vol 67 (12) ◽  
Author(s):  
H Peuschel ◽  
T Ruckelshausen ◽  
C Cavelius ◽  
A Kraegeloh
Keyword(s):  
Epithelial Cells ◽  
Silica Nanoparticles ◽  
Microscopy Study ◽  
Lung Epithelial Cells ◽  
Lung Epithelial

New Synthesis of Isoindolo[2,1–b]isoquinolines. Preparation and Aqueous Bioavailability of its Silica Nanoparticles Hybrid System

2015 ◽  
Vol 19 (13) ◽  
pp. 1292-1300 ◽  
Author(s):  
Amelia Diaz ◽  
J. Manuel Lopez–Romero ◽  
Rafael Contreras-Caceres ◽  
Manuel Algarra ◽  
Rodrigo Rico ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Hybrid System ◽  
New Synthesis

Synthesis and Characterization of Ibandronate-Loaded Silica Nanoparticles and Collagen Nanocomposites

2015 ◽  
Vol 16 (7) ◽  
pp. 661-667 ◽  
Author(s):  
Gisela Alvarez ◽  
Maria Echazu ◽  
Christian Olivetti ◽  
Martin Desimone
Keyword(s):  
Silica Nanoparticles ◽  
Synthesis And Characterization

Sodium Chloride Modified Silica Nanoparticles as a Non-Viral Vector with a High Efficiency of DNA Transfer into Cells

2003 ◽  
Vol 3 (3) ◽  
pp. 273-279 ◽  
Author(s):  
Yuxiang Chen ◽  
Zhigang Xue ◽  
Duo Zheng ◽  
Kun Xia ◽  
Yanzhong Zhao ◽  
...  
Keyword(s):  
Sodium Chloride ◽  
Silica Nanoparticles ◽  
High Efficiency ◽  
Viral Vector ◽  
Dna Transfer ◽  
Modified Silica ◽  
Modified Silica Nanoparticles
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