scholarly journals Surface Functionalization of an Aluminum Alloy to Generate an Antibiofilm Coating Based on Poly(Methyl Methacrylate) and Silver Nanoparticles

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2747 ◽  
Author(s):  
Lisa Muñoz ◽  
Laura Tamayo ◽  
Miguel Gulppi ◽  
Franco Rabagliati ◽  
Marcos Flores ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Aluminum Alloy ◽  
Methyl Methacrylate ◽  
In Situ Polymerization ◽  
Polymerization Reaction ◽  
Experimental Protocol ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer

An experimental protocol was studied to improve the adhesion of a polymeric poly(methyl methacrylate) coating that was modified with silver nanoparticles to an aluminum alloy, AA2024. The nanoparticles were incorporated into the polymeric matrix to add the property of inhibiting biofilm formation to the anticorrosive characteristics of the film, thus also making the coating antibiocorrosive. The protocol consists of functionalizing the surface through a pseudotransesterification treatment using a methyl methacrylate monomer that bonds covalently to the surface and leaves a terminal double bond that promotes and directs the polymerization reaction that takes place in the process that follows immediately after. This results in more compact and thicker poly(methyl methacrylate) (PMMA) coatings than those obtained without pseudotransesterification. The poly(methyl methacrylate) matrix modified with nanoparticles was obtained by incorporating both the nanoparticles and the methyl methacrylate in the reactor. The in situ polymerization involved combining the pretreated AA2024 specimens combined with the methyl methacrylate monomer and AgNps. The antibiofilm capacity of the coating was evaluated against P. aeruginosa, with an excellent response. Not only did the presence of bacteria decrease, but the formation of the exopolymer subunits was 99.99% lower than on the uncoated aluminum alloy or the alloy coated with unmodified poly(methyl methacrylate). As well and significantly, the potentiodynamic polarization measurements indicate that the PMMA-Ag coating has a good anticorrosive property in a 0.1-M NaCl medium.

Characterization of Wood-Polymer Composite prepared by Muchelia macclurei Wood and Methyl Methacrylate Monomer

2011 ◽  
Vol 311-313 ◽  
pp. 177-180
Author(s):  
Yong Feng Li ◽  
Yun Lin Fu ◽  
Hua Wei Huang ◽  
Yi Xing Liu
Keyword(s):  
Methyl Methacrylate ◽  
Polymer Composite ◽  
Wood Cell Wall ◽  
In Situ Polymerization ◽  
Wood Polymer ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer ◽  
Wood Polymer Composite

Michelia macclurei wood with moderate strength is a fast-growing wood in South China. However, it has not been fully utilized. We first prepared it into wood-polymer composite with purpose of good performance by impregnating methyl methacrylate monomer (MMA) into wood pores and following in-situ polymerization. The micro structure of wood-polymer composite, and the morphology and reaction of polymer in wood were characterized by SEM, FTIR and XRD. The SEM observation showed that the MMA monomer polymerized into polymer under the employed conditions and filled up wood cell cavity. FTIR analysis indicated that the monomer rarely reacted with wood cell wall during its polymerization. XRD characterized that the polymer from MMA monomer mainly physically existed in wood pores and remained as an amorphous form.

In-Situ Polymerization of Poly (Methyl Methacrylate)/MgAl Layer Double Hydroxides Nanocomposites with High Dispersion and Enhanced Physics Properties

2006 ◽  
Vol 942 ◽  
Author(s):  
Tsung-Yen Tsai ◽  
Shau-Wen Lu ◽  
Fu-Shou Li
Keyword(s):  
Methyl Methacrylate ◽  
In Situ Polymerization ◽  
Mechanical Analysis ◽  
High Dispersion ◽  
Scanning Calorimetry ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Layer Double Hydroxides ◽  
Double Hydroxides

ABSTRACTPoly(methyl methacrylate)/MgAl layer double hydroxides (PMMA/MgAl LDH) nanocomposites were prepared by in situ free radical polymerization with the organic modified MgAl-K2 LDH in the methyl methacrylate monomer and initiator of benzoyl peroxide. The morphology of MgAl-K2 LDH and PMMA/MgAl-K2 LDH nanocomposites were investigated by transmission electron microscopy (TEM) and powder X-ray diffraction, indicated that the MgAl-K2 LDH were dispersed in PMMA matrix to form PMMA/MgAl-K2 LDH nanocomposites with heterogeneous morphology comprising both exfoliated and intercalated PMMA/MgAl-K2 LDH nanocomposites . The thermal and mechanical characterization were carried out by thermogravimetric analysis (TGA) ¡Bdifferential scanning calorimetry (DSC) and dynamic mechanical analysis (DMA). The properties of PMMA/MgAl-K2 LDH nanocomposites exhibit the better thermal and mechanical properties.

scholarly journals Effect of Ferocene Concentration on the Percent Conversion and Molecular Weight of Poly(Methyl Methacrylate) Homopolymers

2017 ◽  
Vol 14 (2) ◽  
pp. 311-319
Author(s):  
Baghdad Science Journal
Keyword(s):  
Molecular Weight ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Radical Polymerization ◽  
Free Oxygen ◽  
Poly Methyl Methacrylate ◽  
Methacrylate Monomer ◽  
Percent Conversion ◽  
Methyl Methacrylate Monomer

This research is addressing the effect of different ferrocene concentration (0.00, 2.15x10-3, 4.30x10-3, 8.60x10-3, and 12.9x10-3) on the bulk free radical polymerization of methyl methacrylate monomer in benzene using benzoyl peroxide as initiator. The polymerization was conducted at 60º C under free oxygen atmosphere. The resulting polymers were characterized by FTIR. The results were compared with the presence and absence of ferrocene at 10% conversion. The %conversion was 3.04% with no ferrocene present in the polymerization medium and its increase to 9.06 with a first lowest ferrocene concentration added, i.e. 2.15 x10-3mol/l. This was positively reflected on the poly(methyl methacrylate) molecular weight measured by viscosity technique, especially in the presence of ferrocene.

Thermomechanical properties of chemically modified graphene/poly(methyl methacrylate) composites made by in situ polymerization

Carbon ◽  
2011 ◽  
Vol 49 (8) ◽  
pp. 2615-2623 ◽  
Author(s):  
Jeffrey R. Potts ◽  
Sun Hwa Lee ◽  
Todd M. Alam ◽  
Jinho An ◽  
Meryl D. Stoller ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
In Situ Polymerization ◽  
Thermomechanical Properties ◽  
Poly Methyl Methacrylate ◽  
Chemically Modified ◽  
Modified Graphene

Graphene-Poly(Methyl Methacrylate) Composites Prepared by Two Methods

2011 ◽  
Vol 335-336 ◽  
pp. 49-53 ◽  
Author(s):  
Lin Lei ◽  
Jian Hui Qiu ◽  
Xue Li Wu ◽  
Yang Zhao ◽  
Eiichi Sakai
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Methyl Methacrylate ◽  
Graphite Oxide ◽  
Graphene Nanosheet ◽  
Poly Methyl Methacrylate ◽  
Transmission Electron ◽  
Methacrylate Monomer ◽  
Methyl Methacrylate Monomer ◽  
Scanning Electron

Graphene-poly(methyl methacrylate) (GNS-PMMA) composites were prepared by two methods. Graphite oxide nanosheet-poly(methyl methacrylate) (GO-PMMA) composites were prepared of methyl methacrylate monomer and the presence of graphite oxide (GO). Then the GO-PMMA composites were reduced to graphene nanosheet-poly(methyl methacrylate) by using hydrazine hydrate. The obtained composites were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and Transmission electron microscopy (TEM). The composite exhibited conductivities in the 1.58×10-9-4.21 S/cm range, depending on the amounts of graphite oxide and PMMA.

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