A new benzoxazine-based intumescent coating for passive protection against fire

Beraldo, Carlos Henrique Michelin; Silveira, Mauro Ricardo da Silva; Baldissera, Alessandra F.; Ferreira, Carlos Arthur

doi:10.1016/j.porgcoat.2019.105321

Cited by 14 publications

(7 citation statements)

References 40 publications

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“…[ 92–94 ] Therefore, owing to their environmental neutrality, good thermo‐oxidative stability, chemical composition tunability, and excellent heat resistance, POSS have been physically or chemically incorporated into polymer coating materials to improve their thermal and flame‐resistant properties. [ 22,95,96 ]…”

Section: Application Of Poss In Functional Coatingsmentioning

confidence: 99%

Polyhedral oligomeric silsesquioxane‐based functional coatings: A review

et al. 2023

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Polyhedral oligomeric silsesquioxane (POSS)‐based coatings have attracted significant attention from academia and industry over the past decades. The three‐dimensional nano‐sized cage with alternating SiO bonds forms the inorganic core of POSS molecules, while organic functional groups are covalently attached to the Si vertices. With this unique structure, they can be integrated with polymers via different approaches, including physical blending, covalent grafting, and chemical cross‐linking. And the inorganic/organic hybrid nature of POSS offers the coating materials with desirable mechanical, anti‐wetting, anti‐corrosive, icephobic, and fire‐retardant properties. This review focuses on the state‐of‐the‐art developments of POSS‐based functional coatings, while their challenges and future research directions are also discussed.

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Section: Application Of Poss In Functional Coatingsmentioning

confidence: 99%

Polyhedral oligomeric silsesquioxane‐based functional coatings: A review

et al. 2023

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“…Intumescent coatings are used as a passive, aesthetic fire resistance measure and are often painted onto the exterior of a material. The intumescence phenomena require three components to occur: a carbon source, blowing agent, and acid source [117,122]. As the temperature increases, the acid source esterifies the carbon source, which generates a residue through an incomplete combustion reaction.…”

Section: As Intumescent Coating Materialsmentioning

confidence: 99%

“…Consequently, inert gasses will be released. When the blowing agent (commonly melamine) is degraded the char layer will expand [117,122].…”

Section: As Intumescent Coating Materialsmentioning

confidence: 99%

“…Benzoxazine has applications in the aerospace industry and within electric circuits due to its intrinsic flame retardancy and high char yield [122,123]. Benzoxazine as an intumescent coating has only been recently reported, and it has not been reported as the main component of an intumescent system.…”

Section: As Intumescent Coating Materialsmentioning

confidence: 99%

“…Benzoxazine as an intumescent coating has only been recently reported, and it has not been reported as the main component of an intumescent system. Therefore, Beraldo et al [122] aimed to develop an efficient benzoxazine-based intumescent coating. Two important parameters to determine fire resistance of a material are limiting oxygen index (LOI) and UL-94 flame test.…”

Section: As Intumescent Coating Materialsmentioning

confidence: 99%

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Advanced Carbon Materials Derived from Polybenzoxazines: A Review

et al. 2021

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This comprehensive review article summarizes the key properties and applications of advanced carbonaceous materials obtained from polybenzoxazines. Identification of several thermal degradation products that arose during carbonization allowed for several different mechanisms (both competitive ones and independent ones) of carbonization, while also confirming the thermal stability of benzoxazines. Electrochemical properties of polybenzoxazine-derived carbon materials were also examined, noting particularly high pseudocapacitance and charge stability that would make benzoxazines suitable as electrodes. Carbon materials from benzoxazines are also highly versatile and can be synthesized and prepared in a number of ways including as films, foams, nanofibers, nanospheres, and aerogels/xerogels, some of which provide unique properties. One example of the special properties is that materials can be porous not only as aerogels and xerogels, but as nanofibers with highly tailorable porosity, controlled through various preparation techniques including, but not limited to, the use of surfactants and silica nanoparticles. In addition to the high and tailorable porosity, benzoxazines have several properties that make them good for numerous applications of the carbonized forms, including electrodes, batteries, gas adsorbents, catalysts, shielding materials, and intumescent coatings, among others. Extreme thermal and electrical stability also allows benzoxazines to be used in harsher conditions, such as in aerospace applications.

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Construction of Benzoxazine‐linked One‐Dimensional Covalent Organic Frameworks Using the Mannich Reaction

Cheng,

Liu,

Sheng

et al. 2024

Angewandte Chemie

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Covalent polymerization of organic molecules into crystalline one‐dimensional (1D) polymers is effective for achieving desired thermal, optical, and electrical properties, yet it remains a persistent synthetic challenge for their inherent tendency to adopt amorphous or semicrystalline phases. Here we report a strategy to synthesize crystaline 1D covalent organic frameworks (COFs) composing quasi‐conjugated chains with benzoxazine linkages via the one‐pot Mannich reaction. Through [4+2] and [2+2] type Mannich condensation reactions, we fabricated stoichiometric and sub‐stoichiometric 1D covalent polymeric chains, respectively, using doubly and singly‐linked benzoxazine ring. The validity of their crystal structures has been directly visualized through the state‐of‐the‐art cryogenic low‐dose electron microscopy techniques. Post‐synthetic functionalizations of them with a chiral MacMillan catalyst produce crystaline organic photocatalysts that demonstrated excellent catalytic and recyclable performance in light‐driven asymmetric alkylation of aldehydes, affording up to 94% enantiomeric excess

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A new benzoxazine-based intumescent coating for passive protection against fire

Cited by 14 publications

References 40 publications

Polyhedral oligomeric silsesquioxane‐based functional coatings: A review

Polyhedral oligomeric silsesquioxane‐based functional coatings: A review

Advanced Carbon Materials Derived from Polybenzoxazines: A Review

Construction of Benzoxazine‐linked One‐Dimensional Covalent Organic Frameworks Using the Mannich Reaction

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