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Co-modification of epoxy based polyhedral oligomeric silsesquioxanes and polyaniline on graphene for enhancing corrosion resistance of waterborne epoxy coating
- Source :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects. 614:126190
- Publication Year :
- 2021
- Publisher :
- Elsevier BV, 2021.
-
Abstract
- Firstly, polyaniline (PANI) was used to improve dispersibility of graphene (Gr) in water through π-π interactions. Then, the obtained Gr/PANI products was further decorated with the epoxy based polyhedral oligomeric silsesquioxane (EPOSS) to enhance the hydrophobic properties of hybrid materials and compatibility with epoxy resins, thus leading to the increase of corrosion protection properties. From the wettability test results, the contact angle of the cross section of the composite coating reached up to 112.7 ° after grafting EPOSS, indicating that the hydrophobicity of the coating was improved significantly. Besides, the tensile strength of Gr/PANI@EPOSS/epoxy (0.7%) increased to 25.6 MPa, which proves the increase of interface force due to the introduction of epoxy group. The results of electrochemistry test illustrated that the impedance of Gr/PANI@EPOSS/epoxy (0.7%) is still as high as 2.79×107 Ω cm2 after 60 days of immersion, which is much higher than that of other samples.
- Subjects :
- Materials science
Graphene
02 engineering and technology
Epoxy
engineering.material
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Silsesquioxane
0104 chemical sciences
law.invention
Contact angle
chemistry.chemical_compound
Colloid and Surface Chemistry
Coating
chemistry
law
visual_art
Ultimate tensile strength
Polyaniline
visual_art.visual_art_medium
engineering
Composite material
0210 nano-technology
Hybrid material
Subjects
Details
- ISSN :
- 09277757
- Volume :
- 614
- Database :
- OpenAIRE
- Journal :
- Colloids and Surfaces A: Physicochemical and Engineering Aspects
- Accession number :
- edsair.doi...........3086cd80286e901cf02dfbaee558099f