Thermal, electrical and mechanical properties of graphene foam filled poly(methyl methacrylate) composite prepared by in situ polymerization

Acetylation and in situ polymerization are two typical chemical modifications that are used to improve the dimensional stability of bamboo. In this work, the combination of chemical modification of vinyl acetate (VA) acetylation and methyl methacrylate (MMA) in situ polymerization of bamboo was employed. Performances of the treated bamboo were evaluated in terms of dimensional stability, wettability, thermal stability, chemical structure, and dynamic mechanical properties. Results show that the performances (dimensional stability, thermal stability, and wettability) of bamboo that was prepared via the combined pretreatment of VA and MMA (VA/MMA-B) were better than those of raw bamboo, VA single-treated bamboo (VA-B), and MMA single-treated bamboo (MMA-B). According to scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) analyses, VA and MMA were mainly grafted onto the surface of the cell wall or in the bamboo cell lumen. The antiswelling efficiency and contact angle of VA/MMA-B increased to maximum values of 40.71% and 107.1°, respectively. From thermogravimetric analysis (TG/DTG curves), the highest onset decomposition temperature (277 °C) was observed in VA/MMA-B. From DMA analysis, the storage modulus (E’) of VA/MMA-B increased sharply from 15,057 Pa (untreated bamboo) to 17,909 Pa (single-treated bamboo), and the glass transition temperature was improved from 180 °C (raw bamboo) to 205 °C (single-treated bamboo).

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

Carbon ◽

10.1016/j.carbon.2011.02.023 ◽

2011 ◽

Vol 49 (8) ◽

pp. 2615-2623 ◽

Cited By ~ 159

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

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

Molecules ◽

10.3390/molecules23112747 ◽

2018 ◽

Vol 23 (11) ◽

pp. 2747 ◽

Cited By ~ 1

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.

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Preparation of silanized graphene/poly(methyl methacrylate) nanocomposites in situ copolymerization and its mechanical properties

Composites Science and Technology ◽

10.1016/j.compscitech.2014.03.019 ◽

2014 ◽

Vol 97 ◽

pp. 6-11 ◽

Cited By ~ 37

Author(s):

Xinjun Hu ◽

Enqi Su ◽

Bochao Zhu ◽

Junji Jia ◽

Peihong Yao ◽

...

Keyword(s):

Mechanical Properties ◽

Methyl Methacrylate ◽

Poly Methyl Methacrylate ◽

In Situ Copolymerization

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Influence of Graphene Oxide on the Tribological and Electrical Properties of PMMA Composites

Journal of Nanomaterials ◽

10.1155/2013/846102 ◽

2013 ◽

Vol 2013 ◽

pp. 1-5 ◽

Cited By ~ 6

Author(s):

Jiale Song ◽

Jiaoxia Zhang ◽

Chunling Lin

Keyword(s):

Graphene Oxide ◽

Electrical Properties ◽

Methyl Methacrylate ◽

In Situ Polymerization ◽

Raw Materials ◽

Frictional Coefficient ◽

Natural Graphite ◽

Poly Methyl Methacrylate ◽

Hummers Method

The graphene oxide (GO) was obtained by Hummers' method using natural graphite as raw materials. Then, the GO/poly(methyl methacrylate) (PMMA) nanocomposites were prepared by in situ polymerization. The tribological and electrical properties of nanocomposites were studied. As a result, the frictional coefficient of GO/PMMA nanocomposites was prominently improved with the content of the graphene oxide increasing. The electrical properties of nanocomposites were slightly increased when adding the graphene oxide.

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Synthesis of Poly(Methyl Methacrylate) Reinforced by Graphene Nanoplates

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.897.63 ◽

2021 ◽

Vol 897 ◽

pp. 63-70

Author(s):

Elif Kocacinar ◽

Nilgun Baydogan

Keyword(s):

Mechanical Properties ◽

Methyl Methacrylate ◽

In Situ Polymerization ◽

Technical Problem ◽

Test Method ◽

X Ray Diffraction ◽

Sem Images ◽

Poly Methyl Methacrylate ◽

Superior Mechanical Properties ◽

Dispersion Problem

Graphene nanoplatelets (GNPs) was used as a nanofiller in Poly(methyl methacrylate) (PMMA) synthesized by the Atom Transfer Radical Polymerization (ATRP) method. The first step in the synthesis of the PMMA/GNPs was the dispersion of GNPs in the PMMA liquid monomers by combining the solutions so that GNPs had superior mechanical properties, thermal stability, and electrical conductivity also lower density of mass. Then the crosslinked PMMA/GNPs nanocomposite samples were synthesized by using the in-situ polymerization method. However, there was a challenging technical problem in the application of GNPs (at a large amount) in the polymer. For the purpose of benefiting from the advantageous properties of GNPs (especially in bulk quantities) at PMMA, the major problem at the synthesis of PMMA/GNPs nanocomposite was the GNPs dispersion in the polymer matrix. This research has focused on solving that dispersion problem with the aim of enhancing the mechanical properties of the nanocomposite by utilizing the ATRP method as the effective production technic. The structural characterization of PMMA/GNPs nanocomposite was performed for the examination of the integration of GNPs in PMMA. The surface morphology of the nanocomposite was analyzed using SEM images. X-Ray Diffraction (XRD) as a non-destructive test method was used to examine the changes in the crystalline properties of the nanocomposite structure with the rise of the GNPs amount in PMMA. The bonding interactions with each other were investigated by using Raman analysis.

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