Alagar Muthukaruppan (2025) Design of flexible Cardanol-derived Poly (benzoxazines) for Advanced Coatings: Superhydrophobicity, Self-Cleaning, Oil–Water Separation and Corrosion Resistance. Design of flexible Cardanol-derived Poly (benzoxazines) for Advanced Coatings: Superhydrophobicity, Self-Cleaning, Oil–Water Separation and Corrosion Resistance. pp. 1-38.
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Design of flexible cardanol-derived poly (benzoxazines) for advanced coatings Superhydrophobicity, self-cleaning, oil–water separation and corrosion resistance.pdf - Published Version
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Abstract
In the present work, an attempt has been made to develop flexible, partially bio-based
polybenzoxazine matrices with superhydrophobic behaviour for improved oil-water
separation, self-cleaning and anti-corrosive properties. A new type of card-bisphenol (COBP)
has been synthesized using cardanol and octanaldehyde as eco-friendly, natural precursors to
substitute fossil-based materials to maintain environmental sustainability. Four distinct
benzoxazines (COBP-oa, COBP-dda, COBP-oda, and COBP-fa) were synthesized using
COBP and different types of amines viz., octylamine (oa), dodecylamine (dda), octadecyl
amine (oda) and furfurylamine (fa) with para formaldehyde through Mannich condensation
reaction. The non-polar nature of these long aliphatic chains present in the benzoxazine
molecules contributes to an enhanced superhydrophobic behaviour. Structural characterization
of the synthesized monomers was confirmed through FT-IR and 1 H NMR spectroscopic
analyses. DSC analysis infers that the curing temperature of benzoxazine monomers is
increased with increasing the aliphatic chain length. Data from TGA ascertain that the poly
(COBP-fa) exhibited the highest thermal stability and char residue, among the synthesized
polybenzoxazines (PBZs). The COBP-oda possesses a higher value of water contact angle of
155 ◦ which in turn contributes to superhydrophobic behaviour. The superhydrophobic
behaviour also contributes to superior corrosion resistance, with an inhibition efficiency of
95.87 %. Further, it was also observed that the PBZ-coated cotton fabric achieved an oil-water
1
separation efficiency of >90 %. The oil-absorption properties of the PBZ-modified foams
showed 96–99 % oil absorption efficiency. Data obtained from different studies ascertain the
versatility of the developed materials and suggest their utility towards high- performance
coating applications, under adverse environmental conditions.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Card-bisphenol, bio-based polybenzoxazines, superhydrophobic behavior, oil water separation, corrosion-resistance. |
| Divisions: | PSG College of Arts and Science > Department of Chemistry |
| Depositing User: | Dr. B Sivakumar |
| Date Deposited: | 29 Oct 2025 06:17 |
| Last Modified: | 29 Oct 2025 06:17 |
| URI: | https://ir.psgcas.ac.in/id/eprint/2475 |
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