Development of a curcumin-based antifouling and anticorrosion sustainable polybenzoxazine resin composite coating

Synthesis and characterization of polybenzoxazine/silica‐based hybrid nanostructures for flame retardancy applications

“…This phenomenon was also observed in other silica-based polybenzoxazine nanocomposites. [17,18] This measurement is directly related to the presence of polar groups on the material surface and its roughness, presenting hydrophobic surfaces for the silsesquioxane-based polymers.…”

“…Another feature of interest is the hydrophobicity of the crosslinked materials, since a hydrophobic surface favors the water repellency, the antibacterial capacity and the self-cleaning function. [16][17][18] Polybenzoxazines exhibit lower hydrophilic surfaces (contact angles around 70 ) than the conventional phenolic resins (contact angles around 55 ). [19] At present, design and creation of materials with multifunctional characteristics by fine-tuning their chemical composition and morphology has become a focus of attention in the field of materials science, especially in the aforementioned industries.…”

Formaldehyde-Free Synthesis of Fully Bio-Based Multifunctional Bisbenzoxazine Resins from Natural Renewable Starting Materials

“… − Holly and Cope prepared the first monofunctional BZ, 3,4-dihydro-2 H -1,3-benzoxazine, through Mannich condensation . Although the chemical structures of PBZs are similar to those of traditional phenolic resins, PBZs are generally prepared by using simple and self-catalyzed polymerization processes and display good heat resistance, high degradation and glass transition ( T g ) temperatures, near-zero volumetric shrinkage during polymerization, excellent flame retardancy, good mechanical properties, low dielectric constants, water absorption properties, and variable surface free energies. ,− In addition, high flexibility in the molecular design of BZ resins allows a variety of physical and mechanical properties to be introduced into the resulting PBZ materials. − Moreover, the properties of PBZs lead to many potential applications in, for example, adsorbents, metal capture, energy storage, gas uptake, shape-memory and self-healing polymers, anticorrosion coatings, adhesives, and electronic materials. − The syntheses and characteristics of mono-, bi-, tri-, and tetrafunctional BZs have been investigated in detail by many research groups. ,,,,,,, In general, monofunctionalized BZs tend to form linear polymers of relatively lower molecular weight, while bifunctional BZs form cross-linked macromolecules featuring more stable networks …”

Two-dimensional lamellar polyimide/cardanol-based benzoxazine copper polymer composite coatings with excellent anti-corrosion performance

“…2,3 Polybenzoxazine resin has become increasingly popular in anti-corrosion composite coatings because of its close to zero shrinkage, low water absorption, high thermal stability, exible molecular designability, good dielectric characteristics, and superior mechanical properties. [4][5][6] For instance, Xin et al synthesized a silane-functional polybenzoxazine coating with good anti-corrosion shielding performance. 7 The charge transfer resistance (R ct ) of hydrophobic benzoxazine-cured epoxy coating was about 3 fold higher than that of bare steel.…”