Controlled preparation of nanocolorants via a modified miniemulsion polymerization process

2007 ◽  
Vol 104 (5) ◽  
pp. 3036-3041 ◽  
Author(s):  
Z. K. Hu ◽  
M. Z. Xue ◽  
Q. Zhang ◽  
Q. R. Sheng ◽  
Y. G. Liu
Keyword(s):  
Miniemulsion Polymerization ◽  
Polymerization Process ◽  
Controlled Preparation

Preparation of Polyurethane/Acrylic Hybrid Nanoparticles via a Miniemulsion Polymerization Process

2005 ◽  
Vol 38 (10) ◽  
pp. 4183-4192 ◽  
Author(s):  
Mei Li ◽  
Eric S. Daniels ◽  
Victoria Dimonie ◽  
E. David Sudol ◽  
Mohamed S. El-Aasser
Keyword(s):  
Miniemulsion Polymerization ◽  
Hybrid Nanoparticles ◽  
Polymerization Process

scholarly journals Hybrid Latex Particles: Preparation with Miniemulsion Polymerization

2018 ◽  
Vol 149 ◽  
pp. 01035 ◽  
Author(s):  
F. Bouanani
Keyword(s):  
Miniemulsion Polymerization ◽  
Melt Processing ◽  
Montmorillonite Clay ◽  
Polymerization Process ◽  
Surfactant Mixture ◽  
Clay Particles ◽  
Transmission Electron ◽  
Nonionic Surfactant Mixture ◽  
Polymerization Method ◽  
Hybrid Latex

This research developed a novel poly(trifluoropropylmethylsiloxane) (PTMS)/montmorillonite nanoparticles, for technologic applications. PTMS /MMT nanoparticles were prepared by the miniemulsion polymerization method. Montmorillonite clay was encapsulated within a fluorinated cyclosiloxane (1,3,5-tris(trifluoropropylmethyl)cyclotrisiloxane) to give stable water based nanocomposite latex, using miniemulsion polymerization technique. The resulting composite latex was characterized by transmission electron microscopy (TEM), dynamic light scattering (DLS) and RX diffraction. The particles stability was investigated by sedimentation and surface tension measurements. An efficient cationic/nonionic surfactant mixture was used in order to achieve the best compatibility with the monomer. TEM and RX data revealed the partial embedding of montmorillonite in the spherical polymer based nanoparticles. According to DLS measurements, the encapsulated clay particles conserve their size throughout the polymerization process. The melt processing of poly(trifluoropropylmethylsiloxane) matrix to encapsulate the montmorillonite clay was also carried out for comparison purposes.

Antimicrobial Activity of the Sodium Lauryl Sulphate Used as Surfactant in the Polymeric Encapsulation Processes

2020 ◽  
Vol 1012 ◽  
pp. 500-505
Author(s):  
Pâmela Fagundes ◽  
Thaís Karoline Carniel ◽  
Lais Regina Mazon ◽  
Josiane Maria Muneron de Mello ◽  
Lucinao Luiz Silva ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Antimicrobial Activity ◽  
Miniemulsion Polymerization ◽  
Sodium Lauryl Sulphate ◽  
Polymerization Process ◽  
Residual Concentration ◽  
Solid Media ◽  
The Many ◽  
Polymeric Encapsulation

Miniemulsion polymerization process is a very versatile technique used for the polymeric encapsulation of the many essential oils. In this process some surfactant compounds are used to define the capsules characteristics, as an example the Sodium Lauryl Sulphate (SLS) that is one of the most used surfactants. But, after the miniemulsion polymerization synthesis the residual amount of SLS can manifest an antimicrobial action that can improve or to prejudice the final properties of the encapsulated products, depending of its percentual concentrations. In this sense, the objective of this work was to evaluate the antimicrobial activity of polycaprolactone (PCL) capsules synthesized with different residual concentrations of the SLS surfactant after the miniemulsion polymerization processes. The antimicrobial evaluations demonstrated from solid media diffusion test that the PCL microcapsules are microbiologically inactive for the bacteria Staphylococcus aureus and Escherichia coli when are synthetized with residual concentrations of SLS below 0.0125%. The minimum inhibitory concentration (MIC) of residual SLS for the bacteria Staphylococcus aureus is 0.0146% and for the bacteria Escherichia coli the complete bacterial inhibition not was detected at the maximum residual concentration studied of 0.1167%.

scholarly journals Assessing the Effect of CeO2 Nanoparticles as Corrosion Inhibitor in Hybrid Biobased Waterborne Acrylic Direct to Metal Coating Binders

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 848
Author(s):  
Edurne González ◽  
Robin Stuhr ◽  
Jesús Manuel Vega ◽  
Eva García-Lecina ◽  
Hans-Jürgen Grande ◽  
...  
Keyword(s):  
Polymer Film ◽  
Electrochemical Impedance ◽  
Water Solution ◽  
Miniemulsion Polymerization ◽  
Ceo2 Nanoparticles ◽  
Polymerization Process ◽  
Homogeneous Distribution ◽  
Waterborne Coatings ◽  
Anticorrosion Performance ◽  
Steel Substrates

CeO2 nanoparticles were incorporated in waterborne binders containing high biobased content (up to 70%) in order to analyze the anticorrosion performance for direct to metal coatings. Biobased binders were synthesized by batch miniemulsion polymerization of 2-octyl acrylate and isobornyl methacrylate monomers using a phosphate polymerizable surfactant (Sipomer PAM200) that lead to the formation of phosphate functionalized latexes. Upon the direct application of such binders on steel, the functionalized polymer particles were able to interact with steel, creating a thin phosphatization layer between the metal and the polymer and avoiding flash rust. The in situ incorporation of the CeO2 nanoparticles during the polymerization process led to their homogeneous distribution in the final polymer film, which produced outstanding anticorrosion performance according to the Electrochemical Impedance Spectroscopy measurements. In fact, steel substrates coated with the hybrid polymer film (30–40 µm thick) showed high barrier corrosion resistance after 41 days (~1000 h) of immersion in NaCl water solution and active inhibition capabilities thanks to the presence of the CeO2 nanoparticles. This work opens the door to the fabrication of sustainable hybrid anticorrosion waterborne coatings.

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