scholarly journals Flexible Polyaniline/Poly(methyl methacrylate) Composite FibersviaElectrospinning and In Situ Polymerization for Ammonia Gas Sensing and Strain Sensing

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Xian-Sheng Jia ◽  
Cheng-Chun Tang ◽  
Xu Yan ◽  
Gui-Feng Yu ◽  
Jin-Tao Li ◽  
...  
Keyword(s):  
Methyl Methacrylate ◽  
Electrical Resistance ◽  
In Situ Polymerization ◽  
Composite Fiber ◽  
Strain Sensing ◽  
Composite Fibers ◽  
High Concentration ◽  
Ammonia Gas ◽  
Poly Methyl Methacrylate

Conducting polyaniline (PANI) was in situ polymerized at the surface of electrospun poly(methyl methacrylate) (PMMA) fibers to obtain flexible composite fibers. The electrical conductivity of an individual PANI/PMMA composite fiber was estimated to be 2.0 × 10−1 S cm−1at room temperature. The ammonia sensing properties of the samples were tested by impedance analysis. The PANI/PMMA fibers could obviously respond to low concentration of ammonia at ppb level and could respond to relatively high concentration of ammonia at 10 ppm level quickly. In addition, the sensitivity exhibited a good linear relationship to the ammonia concentration. Particularly, the flexible PANI/PMMA fibers showed a reversible change in electrical resistance with repeated cycles of bending and relaxing, and the electrical resistance decreased with the increase of curvature. These results indicate that the flexible PANI/PMMA composite fibers may be used in toxic ammonia gas detection, strain sensing, and flexible electronic devices.

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

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.

Electrical Properties and Morphological Structures of UHMWPE/PANI Composite Fibers Doped with Hydrochloric Acid

2013 ◽  
Vol 796 ◽  
pp. 166-171 ◽  
Author(s):  
Jian Han Hong ◽  
Zhi Juan Pan ◽  
Min Li ◽  
Mu Yao
Keyword(s):  
Mechanical Property ◽  
Electrical Conductivity ◽  
Hydrochloric Acid ◽  
In Situ Polymerization ◽  
Breaking Strength ◽  
Composite Fiber ◽  
Pani Film ◽  
Composite Fibers ◽  
Pani Composite

UHMWPE/PANI composite fibers were prepared by in-situ polymerization. The effects of concentration of hydrochloric acid on the electrical conductivity and surface morphology of the composite fiber were investigated, and the chemical construction and mechanical property were also studied. The results indicated that composite fibers prepared by in-situ polymerization were electrical conductive due to the conductive PANI film which adheres to the surface of matrix fibers, and the electrical conductivity reached 10-1S/cm. The roughness increased, and the electrical conductivity of UHMWPE/PANI composite fiber increased at the first and then decreased with the increase of concentration of HCl, the highest electrical conductivity obtained with the concentration of HCl of 0.7mol/L. The FTIR curves indicated that the composite fiber was a blending system of matrix fiber and PANI, and the chemical construction of matrix fiber was unchanged. The fibers breaking strength increased a little and breaking elongation unchanged basically after the conduction treatment.

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

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
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.

Fabrication of poly(methyl methacrylate)/silica KIT-6 nanocomposites via in situ polymerization approach and their application for removal of Cu2+ from aqueous solution

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11419-11429 ◽  
Author(s):  
Mohammad Dinari ◽  
Gholamhossein Mohammadnezhad ◽  
Roozbeh Soltani
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Methyl Methacrylate ◽  
In Situ Polymerization ◽  
Poly Methyl Methacrylate ◽  
Silica Nanocomposites

Novel mesoporous silica nanocomposites for adsorption of Cu(ii) from aqueous solution were prepared by in situ polymerization of MMA and modified KIT-6 as filler.

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