polymeric particles
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2022 ◽  
Vol 58 (4) ◽  
pp. 138-146
Author(s):  
Alina Crina Muresan ◽  
Lidia Benea

In this study different type of composite coatings was obtained by electrodeposition using zinc as matrix and polymeric particles as disperse phase in zinc sulphate electrolyte. The effects of some electrodeposition parameters on the thickness and morphology of obtained composite coatings were analysed by optical microscopy, Scanning Electron Microscopy (SEM) and Energy-Dispersive X-Ray Spectroscopy (EDX) methods. Polymeric particles inclusion into zinc matrix was correlated with imposed electrodeposition parameters. It was observed that the thickness of the coatings is influenced by electrodeposition parameters. From the morphology of the coatings, it could be concluded that pure zinc has a regular surface with hexagonal crystals, while the composite coatings have fine surface structure. Also, the electrodeposition parameters influence the inclusion of the dispersed phase into metallic matrix that will influence further the different properties of the composite materials.


Author(s):  
Daniela Ap dos Santos ◽  
Adriano M. Oliveira ◽  
Natália N.P. Cerize ◽  
Kelly C. Manhani ◽  
Douglas da S. Santos ◽  
...  

2021 ◽  
Author(s):  
Alina E. Sandu ◽  
Aurica P. Chiriac ◽  
Alina g. Rusu ◽  
Alexandru M. Serban ◽  
Loredana E. Nita ◽  
...  

Molecules ◽  
2021 ◽  
Vol 26 (22) ◽  
pp. 6864
Author(s):  
Vladimir Burilov ◽  
Diana Mironova ◽  
Elsa Sultanova ◽  
Ramila Garipova ◽  
Vladimir Evtugyn ◽  
...  

A new polymeric NHC carrier was synthesized by sequential supramolecular self-assembly and copper-catalyzed azide-alkyne cycloaddition (CuAAC) of amphiphilic imidazolium calix[4]arenes with octyl lipophilic fragments. Obtained polytriazole-imidazolium particles were found as monodisperse submicron particles, with the average diameter of 236 ± 34 nm and average molecular weight of 1380 ± 96 kDa. Successful CuAAC polymerization has been proved using IR spectroscopy and high-resolution ESI mass spectrometry. Polymeric particles, as well as aggregates made from precursor macrocycles, were decorated by Pd clusters (2 nm) for further catalytic investigations. Pd nanoclusters, supported on the polymeric surface, were found highly catalytically active in the model reduction of p-nitrophenol, giving reaction rates an order of magnitude higher compared to literature examples. The reaction was recycled using the same catalyst five times without any loss of activity.


2021 ◽  
Vol 16 (12) ◽  
pp. 1057-1072
Author(s):  
Milad Roshani ◽  
Nasim Kiaie ◽  
Rouhollah Mehdinavaz Aghdam

By introducing biomaterials and stem cells into Parkinson’s disease (PD), therapeutic approaches have led to promising results due to facilitating brain targeting and blood–brain barrier permeation of the drugs and genes. Here, after reviewing the most recent drug- and gene-delivery vehicles including liposomes, exosomes, natural/synthetic polymeric particles/fibers, metallic/ceramic nanoparticles and microbubbles, used for Parkinson’s disease treatment, the effect of stem cells as a reservoir of neurotrophic factors and exosomes is provided.


2021 ◽  
Vol 24 ◽  
pp. 101097
Author(s):  
David Sonnleitner ◽  
Natascha Schäfer ◽  
Annalena Wieland ◽  
Lena Fischer ◽  
Patrick Pasberg ◽  
...  

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