Detail publikace

Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules

Ullah, H., Qureshi, K.S., Khan, U., Zaffar, M., Yang, Y.J., Rabat, N.E., Khan, M.I., Saqib, S., Mukhtar, A., Ullah, S., Mubashir, M., Bokhari, A., Chai, W.S., Chew, K.W., Show, P.L.

Originální název

Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

The restoration of mechanical properties is desired for creating the self-healing coatings with no corrosion capabilities. The encapsulation of epoxy resins is limited by various factors in urea and melamine formaldehyde microcapsules. An improved method was developed, where epoxy resin was encapsulated by individual wrapping of poly(melamine-formaldehyde) and poly(urea-formaldehyde) shell around emulsified epoxy droplets via oil-in-water emulsion polymerization method. The synthesized materials were characterized analytically. The curing of the epoxy was achieved by adding the [Ni/Co(2-MI)(6)]center dot 2NO(3) as a latent hardener and iron acetylacetonate [Fe(acac)(3)] as a latent accelerator. Isothermal and non-isothermal differential scanning calorimetric analysis revealed lower curing temperature (T-onset = 116 degrees C) and lower activation energies (Ea approximate to 69-75 kJ/mol). The addition of microcapsules and complexes did not adversely alter the flexural strength and flexural modulus of the epoxy coatings. The adhesion strength of neat coating decreased from 6310.8 +/- 31 to 4720.9 +/- 60 kPa and percent healing increased from 50.83 to 67.45% in the presence of acetylacetonate complex at 10 wt% of microcapsules.

Klíčová slova

Adhesion strength; Epoxy resins; Flexural strength; Melamine-urea-formaldehyde; Metal imidazole complex; Self-healing

Autoři

Ullah, H., Qureshi, K.S., Khan, U., Zaffar, M., Yang, Y.J., Rabat, N.E., Khan, M.I., Saqib, S., Mukhtar, A., Ullah, S., Mubashir, M., Bokhari, A., Chai, W.S., Chew, K.W., Show, P.L.

Vydáno

1. 12. 2021

Nakladatel

Elsevier Ltd.

Místo

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

ISSN

0045-6535

Periodikum

CHEMOSPHERE

Číslo

285

Stát

Spojené království Velké Británie a Severního Irska

Strany od

131492

Strany do

131492

Strany počet

12

URL

https://www.sciencedirect.com/science/article/abs/pii/S0045653521019640?via%3Dihub

BibTex

@article{BUT172195,
  author="Syed Awais Ali Shah {Bokhari}",
  title="Self-healing epoxy coating synthesis by embedment of metal 2-methyl imidazole and acetylacetonate complexes with microcapsules",
  journal="CHEMOSPHERE",
  year="2021",
  number="285",
  pages="131492--131492",
  doi="10.1016/j.chemosphere.2021.131492",
  issn="0045-6535",
  url="https://www.sciencedirect.com/science/article/abs/pii/S0045653521019640?via%3Dihub"
}