The effects of DOPO modified Co-based metalorganic framework on flame retardancy, stiffness and thermal stability of epoxy resin

Li-yun, Cai; Xin, Fei; Zhai, Congcong; Chen, Yu; Xu, Bo; Li, Xiangmei

doi:10.1039/d0ra08982f

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…It was shown that MOFs and DOPO have synergistic effects to enhance the smoke suppression performance of the polymer. In addition to the graft modification of DOPO on the original MOFs, some MOFs were coated on DOPO [ 70 , 71 ]. The metal elements in MOFs were also used to promote catalytic carbonization, forming a denser char layer and providing a more effective barrier 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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“…Huang et al [ 23 ] synthesized a nitrogen and phosphorus ionic liquid functional MIL-101-NH 2 and blended it in the epoxy to improve fire safety. Cai et al [ 24 ] made DOPO react with the –C=N– of methylimidazole in a Zn-MOF to raise the flame-retardant quality of epoxy resin (EP). Therefore, in this work, ferric MOFs combined with phosphorous flame retardants were introduced to reduce the flammability of PET.…”

Section: Introductionmentioning

confidence: 99%

Thermal Degradation and Carbonization Mechanism of Fe-Based Metal-Organic Frameworks onto Flame-Retardant Polyethylene Terephthalate

Wang

2023

Polymers

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Currently, the metal-organic framework (MOF) is a promising candidate for flame−retardant polymers. In this study, a Fe−based MOF, MIL-88B(Fe), was introduced to polyethylene terephthalate (PET) and 3−hydroxyphenylphosphinyl-propanoic acid copolymer (P−PET) to reduce the fire hazard involved in using PET. The limiting oxygen indexes (LOIs) of MIL−PET and MIL−P−PET improved by 27% and 30%, respectively. The UL−94 level achieved for MIL−P−PET was V−0 rating. The thermal degradation and carbonization mechanisms of MIL−PET and MIL−P−PET were systematically investigated through thermogravimetric analysis coupled with a Fourier transform infrared spectroscopy (TG−IR), pyrolysis-gas chromatography−mass spectrometry (Py−GC−MS), x−ray photoelectron spectroscopy (XPS), and Raman spectrum combined with quantum chemical molecular dynamics simulation. With the addition of MIL−88B(Fe), high graphitization and a hard flammability char residual were generated. Compared with neat PET, the ferric ions efficiently catalyzed the homolytic cleavage and dehydrogenation of PET to produce a large amount of CO2 and terephthalic acid for MIL−PET in gas phase. Rough and hierarchical char residual with ferric oxide was also generated when temperatures exceeded 600 °C. However, the carbonization process was inhibited due to the coordinated complex between phosphorus and ferric ions in MIL−P−PET, invaliding the decarboxylation and generating more benzoic acid and its precursor, which led to heavy smoke.

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“…7 It has been reported that the fiber-reinforced polymer composites (FRPC) have a number of outstanding mechanical properties and some even surpass those of commonly used structural materials, such as steel. 8,9 Commonly used fibers include glass fiber, aramid fiber, carbon fiber, asbestos fiber, boron fiber, and other petroleum-based products, which are difficult to be decomposed through natural processes which will affect the environment and human health. 10,11 While striving to improve the brittleness of the epoxy resin, the production of ecological materials with unique characteristics.…”

Section: Introductionmentioning

confidence: 99%

Improving mechanical, thermal, and erosive wear performance of natural bamboo fibers modified epoxy resin matrix composites

Jiang

Liu

et al. 2022

Composites and Advanced Materials

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Natural bamboo fibers (BFs), which were treated by silane coupling agents, reinforced epoxy resin (EP)–based composite were synthesized. Effects of the coupling agents on the chemical structures of the BFs were characterized by Fourier Transform Infrared Spectroscopy. The mechanical properties, such as tensile strength, flexural strength, impact strength, and hardness of the BFs/EP-based composites were improved significantly, which could be attributed to the excellent strengthening effect of the BFs. Simultaneously, experimental investigations on the thermal behaviors of the BFs/epoxy composites were also presented, indicating that the thermal decomposition temperature of the polymer materials was lowered but the flame retardancy was improved. The bamboo fiber breakage and fiber split were also observed on the impact fracture surface of the composites, which indicate energy dissipation during fiber debonding and pullout process. Moreover, the erosive wear tests have also been carried out to analyze the erosive wear properties of the natural bamboo fibers which modified the epoxy matrix composites. The results indicate that the erosive wear resistance of the EP-based composite was improved greatly when the natural bamboo fibers content was 15 wt.%.

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The effects of DOPO modified Co-based metalorganic framework on flame retardancy, stiffness and thermal stability of epoxy resin

Abstract: The DOPO@ZIF-67 promoted the carbonization process of the EP flame retardant composites, and the rigidity and damping coefficient of EP composites are also improved compared with pure EP.

Cited by 9 publications

References 38 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

Thermal Degradation and Carbonization Mechanism of Fe-Based Metal-Organic Frameworks onto Flame-Retardant Polyethylene Terephthalate

Improving mechanical, thermal, and erosive wear performance of natural bamboo fibers modified epoxy resin matrix composites

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