Facile fabrication of cyclodextrin-based and integrated flame retardant in intumescent flame-retarding polypropylene

Zheng, Zaihang; Xia, Yurou; Liao, Chenchen; Liu, Yuhang; Dai, Boya; Guo, Zhenxue; Chai, Weihong

doi:10.1007/s10973-020-10455-x

Cited by 14 publications

(3 citation statements)

References 28 publications

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“…Then, the mass loss in the range 350 and 450°C mainly attributes to the thermal decomposition of β‐cyclodextrin main chains. It can be found that the decomposition temperature of the β‐CDPM is higher than that of β‐cyclodextrin reported in the literature, 26 indicating a strong chemical interaction between β‐CDPM and H 3 PO 4 . After that, as the temperature rises from 450 to 800°C, the further degradation of CDPM results in the formation of a loose char structure, and char residue rate at 800°C is 30.8 wt.%.…”

Section: Resultsmentioning

confidence: 59%

Improvement of the flame retardance of epoxy resin composites reinforced with cyclodextrin phosphate melamine salt

Zhi,

Zhao,

Yang

et al. 2023

Vinyl Additive Technology

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Epoxy resin is widely applied in civil aircraft, automobile and electronics products because of its good processing, adhesion, and mechanical properties, but its application is limited due to its easy combustion. Therefore, it is worthwhile to carry out flame‐retardant treatment for epoxy resin. In this study, a new bio‐based three‐source integrated intumescent flame‐retardant cyclodextrin phosphate melamine salt (CDPM) was synthesized from β‐cyclodextrin, phosphoric acid, and melamine, and it was employed as an additive flame retardant to fabricate CDPM/epoxy resin (CDPM/EP) composites. Thermogravimetric analysis results manifested that CDPM slightly improved the thermal stability of CDPM/EP composites. The CDPM/EP composite containing 10 wt.% CDPM acquired a limiting oxygen index of 32.9% and passed UL94 V‐0 rating. Moreover, the peak heat release rate, total heat release, and total smoke production, were respectively decreased by 46.4%, 55.5%, and 61.8% in contrast with neat epoxy resin. These results demonstrated that CDPM/EP could exert excellent flame retardance and smoke suppression performance. Scanning electron microscope and Raman results confirmed that CDPM facilitated the formation of residual char. Moreover, thermogravimetric/infrared results showed that CDPM/EP produced plenty of phosphorus‐containing free radicals and nonflammable NH3 during pyrolysis process, which played a good flame retardance effect in gas phase. This study provides a new approach for the design and development of low‐cost intumescent bio‐based flame retardant for epoxy resin.Highlights Novel three‐source intumescent bio‐based flame‐retardant CDPM was successfully synthesized. CDPM was incorporated into epoxy resin as an additive flame retardant. Only 10 wt.% CDPM provided 55.5% and 61.8% reductions of total heat release and total smoke production, respectively. CDPM/EP composites exhibited an excellent flame retardancy and smoke suppression properties. The outstanding promoting carbonization effect of CDPM in condensed phase contributes to reduce the release of heat and smoke.

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Section: Resultsmentioning

confidence: 59%

Improvement of the flame retardance of epoxy resin composites reinforced with cyclodextrin phosphate melamine salt

Zhi,

Zhao,

Yang

et al. 2023

Vinyl Additive Technology

View full text Add to dashboard Cite

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“…Hydrophobic cyclodextrin flame retardants (MCDPM) were obtained via a facile methodology according to our preceding work. 33 The concrete experimental procedures have been described in the Supporting Information.…”

Section: ■ Introductionmentioning

confidence: 99%

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

Tang,

Gao,

et al. 2024

Langmuir

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Traditionally, many coatings were merely concentrated on settling the inherent fire protection problem of steel structures, while surface contamination and corrosion susceptibility should also be considered. Concurrently addressing these problems in fireproof efficiency and surface multifunctionality has become an issue of great significance in further expanding the application value in industrial and daily scenarios. Based on this condition, ecofriendly, graphene-based, and superhydrophobic coatings with multifunctional integration were constructed on steel via a one-step spraying method. The as-prepared coatings mainly consist of epoxy resin (EP), silicone resin (SR), a cyclodextrin-based flame retardant (MCDPM), expandable graphite (EG), and multilayered graphene (MG). The results demonstrate that the water contact angle (WCA) and water sliding angle (WSA) of asprepared coatings can reach 156.8 ± 1.6 and 5.8 ± 0.7°, respectively, revealing good water repellency and self-cleaning properties. The coatings can also exhibit adequate adaptability for various substrates including wood, polyurethane foam, and cotton fabrics. Besides, good durability and robustness of coatings have been also verified via acid/alkali immersion, outdoor exposure, O 2 /plasma etching, and linear abrasion tests. Simultaneously, the coatings can exhibit excellent anticorrosion capacity for steel materials via a double barrier effect. Most importantly, the coatings have exhibited the lowest backside temperature (234.5 °C) during fire impact tests, suggesting excellent fireproof and heat insulation performance. This fact can be ascribed to the conjunct action between the physical/chemical charring process of flame retardants and the remarkable thermal stability of graphene. Consequently, this article can be expected to further promote the development and application of multifunctional-integrated coatings for steel structures in more fields.

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“…Recent studies indicated that polymer composite's water resistance and flame retardancy are significantly improved via microencapsulation and graft modification. [20][21][22] As for another component of IFRs, the increasing depletion of petroleum resources have made renewable natural polymers (such as chitosan) [23][24][25][26][27] that contain a large number of hydroxyl groups as carbonizing agent attract the attention of researchers, which provide a solution to this dilemma. 28,29 As the decomposition of chitosan through ring opening in the higher temperature zone, a thermostable cross-linked structure with aromatic rings formed over the substrate.…”

mentioning

confidence: 99%

The synergetic effect of bis(2‐hydroxyethyl) terephthalate from glycolysis of poly(ethylene terephthalate) on the intumescent flame retardancy of waterborne polyurethane

Zhang

et al. 2023

Polymer Engineering & Sci

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In light of the escalating accumulation of polymer waste in daily life, chemical recycling of polymers and value‐added utilization of products have gained considerable attention in recent years. Researchers have widely explored the potential of bis(2‐hydroxyethyl) terephthalate (BHET) derived from the glycolysis recycling of poly(ethylene terephthalate) (PET) waste in the synthesis of polymers or concrete. In this study, we synthesized BHET through glycolysis recycling of PET, and combined it with microencapsulated ammonium polyphosphate (SiO2@APP) and carboxymethyl chitosan to design a series of intumescent flame‐retardant waterborne polyurethane (IFRWPU). The synergistic effect of BHET and SiO2@APP was demonstrated, and the resulting IFRWPU with 12.5 wt% IFR and 3 wt% BHET achieved a limit oxygen index of 25.8% and a 73% reduction in the peak heat release rate in flame retardancy tests. Furthermore, the interaction of BHET and flame retardant was discussed using the analysis of char residue and pyrolytic gas. Overall, this work provides a novel strategy to construct superior flame‐retarded waterborne polyurethane with admirable bonding performance.Highlights The application of glycolysis product of PET in the flame‐retardant modification of WPU. The synergistic enhancement of flame retardancy between BHET and IFR was confirmed. The intumescent flame‐retardant was composed of SiO2@APP and CMCS.

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Facile fabrication of cyclodextrin-based and integrated flame retardant in intumescent flame-retarding polypropylene

Cited by 14 publications

References 28 publications

Improvement of the flame retardance of epoxy resin composites reinforced with cyclodextrin phosphate melamine salt

Improvement of the flame retardance of epoxy resin composites reinforced with cyclodextrin phosphate melamine salt

One-Step Spraying Strategy for Fabricating Bioinspired, Graphene-Based, and Multifunctional-Integrated Coatings on Structural Steel with Good Water Repellency, Fireproofing, Anticorrosion, and Durability

The synergetic effect of bis(2‐hydroxyethyl) terephthalate from glycolysis of poly(ethylene terephthalate) on the intumescent flame retardancy of waterborne polyurethane

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