Fabrication of polyimide foams with superior mechanical and flame resistance properties utilizing the graft copolymerization between red phosphorus and graphene oxide

Liu, Hongtao; Guo, Yi; Tian, Huafeng; Yao, Yuanyuan; Liu, Qian; Zhou, Hongfu

doi:10.1016/j.mseb.2021.115498

Cited by 17 publications

(6 citation statements)

References 46 publications

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“…At the same time, because halogens are regarded as substances that are toxic and affect environmental permanence, halogen-free flame retardants will naturally receive more attention [ 45 , 46 , 47 ]. Traditional phosphorus-based flame retardants include red phosphorus, phosphate, ammonium polyphosphate (APP), etc., while nitrogen-based flame retardants contain melamine and dicyandiamide [ 48 , 49 , 50 , 51 ]. Because phosphorus-based flame retardants and nitrogen-containing compounds are found to have a good synergistic effect, the two elements are also often combined in the design of flame retardants to bring into play the P-N synergistic effect.…”

Section: Hybrid Of Phosphorus–nitrogen Compounds and Mofs As Flame Re...mentioning

confidence: 99%

Composites Filled with Metal Organic Frameworks and Their Derivatives: Recent Developments in Flame Retardants

Lyu

Hou

et al. 2022

Polymers

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Polymer matrix is vulnerable to fire hazards and needs to add flame retardants to enhance its performance and make its application scenarios more extensive. At this stage, it is more necessary to add multiple flame-retardant elements and build a multi-component synergistic system. Metal organic frameworks (MOFs) have been studied for nearly three decades since their introduction. MOFs are known for their structural advantages but have only been applied to flame-retardant polymers for a relatively short period of time. In this paper, we review the development of MOFs utilized as flame retardants and analyze the flame-retardant mechanisms in the gas phase and condensed phase from the original MOF materials, modified MOF composites, and MOF-derived composites as flame retardants, respectively. The effects of carbon-based materials, phosphorus-based materials, nitrogen-based materials, and biomass on the flame-retardant properties of polymers are discussed in the context of MOFs. The construction of MOF multi-structured flame retardants is also introduced, and a variety of MOF-based flame retardants with different morphologies are shown to broaden the ideas for subsequent research.

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Section: Hybrid Of Phosphorus–nitrogen Compounds and Mofs As Flame Re...mentioning

confidence: 99%

Composites Filled with Metal Organic Frameworks and Their Derivatives: Recent Developments in Flame Retardants

Lyu

Hou

et al. 2022

Polymers

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“…It was reported that phosphorus containing radicals have 5 times higher flame retardancy than bromine and 10 times higher than chlorine radicals [106][107][108][109][110][111][112]. Red phosphorus is a common option of flame-retardant materials for polyesters, polyamides, and polyurethane [113][114][115]. It is considered to be very effective as a high-concentration source of phosphorus.…”

Section: Phosphazenementioning

confidence: 99%

Polyimide Copolymers and Nanocomposites: A Review of the Synergistic Effects of the Constituents on the Fire-Retardancy Behavior

et al. 2022

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Carbon-based polymer can catch fire when used as cathode material in batteries and supercapacitors, due to short circuiting. Polyimide is known to exhibit flame retardancy by forming char layer in condensed phase. The high char yield of polyimide is attributed to its aromatic nature and the existence of a donor–acceptor complex in its backbone. Fabrication of hybrid polyimide material can provide better protection against fire based on multiple fire-retardancy mechanisms. Nanocomposites generally show a significant enhancement in mechanical, electrical, and thermal properties. Nanoparticles, such as graphene and carbon nanotubes, can enhance flame retardancy in condensed phase by forming a dense char layer. Silicone-based materials can also provide fire retardancy in condensed phase by a similar mechanism as polyimide. However, some inorganic fire retardants, such as phosphazene, can enhance flame retardancy in gaseous phase by releasing flame inhibiting radicals. The flame inhibiting radicals generated by phosphazene are released into the gaseous phase during combustion. A hybrid system constituted of polyimide, silicone-based additives, and phosphazene would provide significant improvement in flame retardancy in both the condensed phase and gas phase. In this review, several flame-retardant polyimide-based systems are described. This review which focuses on the various combinations of polyimide and other candidate fire-retardant materials would shed light on the nature of an effective multifunctional flame-retardant hybrid materials.

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“…[1] Thus, PIF bears the characteristics of PI resin and porous material, exhibiting exceptional thermal resistance, flame-retardant, self-extinguishing, irradiation resistance, thermal insulation, cushioning, and vibration-damping properties. [2][3][4][5][6][7] As a result, it has been extensively employed in the fields of aerospace and aeronautics, submarine, transportation, and microelectronics. [8][9][10][11] For example, the common application fields for PIFs include insulation material for rocket fuel storage tanks, thermal and sound DOI: 10.1002/marc.202300357 insulation for submarines as well as structural core materials for advanced composite materials.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Lightweight Polyimide Foams with Exceptional Mechanical and Thermal Properties

Tian,

Luo,

Meng

et al. 2023

Macromol. Rapid Commun.

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Lightweight polyimide foams (PIFs) with exceptional thermal resistance and compressive properties were fabricated by heating polyester ammonium salts (PEASs) which were prepared by co‐polymerizing 4, 4’‐diaminobenzanilide (DABA), 4, 4’‐diaminodiphenyl methane (MDA) and 3, 3’, 4, 4’‐benzophenone tetracarboxylic dianhydride (BTDA). Hydrogen bonds were formed between CONH and C = O in the PI chains due to the addition of DABA and the melt viscosity of PEAS precursors increased with increasing content of DABA, which was advantageous to bind the foaming gases for cell expansion. The expansion ratio of PEAS precursors was increased from 633% to 1133% when the molar ratio of MDA/DABA was changed from 10:0 to 6:4. The compressive strength and modulus of PIFM9D1 (i.e., the molar ratio of MDA/DABA was 9:1, foam density: 120.8 kg·m−3) reached as high as 0.59 and 15.0 MPa, respectively. The PIFs possessed prominent thermal performance with the initial thermal degradation temperatures (under both nitrogen and air atmosphere) and glass transition temperatures (as assessed by DSC and DMA) exceeding 511 and 292 °C, respectively. The thermal conductivity of PIFs was lower than 0.049 W·m−1·K−1, which exhibited promising applications for serving as high‐temperature thermal insulation materials in the fields of aerospace, marine, and nuclear sectors among others.This article is protected by copyright. All rights reserved

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Fabrication of polyimide foams with superior mechanical and flame resistance properties utilizing the graft copolymerization between red phosphorus and graphene oxide

Cited by 17 publications

References 46 publications

Composites Filled with Metal Organic Frameworks and Their Derivatives: Recent Developments in Flame Retardants

Composites Filled with Metal Organic Frameworks and Their Derivatives: Recent Developments in Flame Retardants

Polyimide Copolymers and Nanocomposites: A Review of the Synergistic Effects of the Constituents on the Fire-Retardancy Behavior

Fabrication of Lightweight Polyimide Foams with Exceptional Mechanical and Thermal Properties

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