Flame-retardant, transparent, mechanically-strong and tough epoxy resin enabled by high-efficiency multifunctional boron-based polyphosphonamide

Huo, Siqi; Zhong-xiao, Zhou; Jiang, Jinchun; Sai, Ting; Ran, Shiya; Fang, Zhengping; Song, Pingan; Wang, Hao

doi:10.1016/j.cej.2021.131578

Cited by 184 publications

(93 citation statements)

References 69 publications

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“…It is worth noting that the bioSiC/EP composite could maintain its initial shape after burning for 180 s (Figure 9h), which is due to the densely interconnected 3D bioSiC structure stabilizing the whole framework of the composite. [90][91][92] Combined with infrared thermal images (Figure 9c,f,i), the pure EP showed obvious deformation after burning for 30 s, however, the random SiC/EP and bioSiC/EP composites could maintain its initial shape. In addition, the surface temperature of bioSiC/EP composite is higher than the random SiC/EP composite at the same combustion time (60 s), indicating that the heat transfer is faster in the bioSiC/EP composite.…”

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…Therefore, such an outstanding flame retardant performance enables the bioSiC/EP composite to serve as a promising thermal management material for thermal manipulation at high temperature as well as validating practical work ability in some extreme conditions, such as fire circumstances. [91,92] Figure 10 shows the stress-strain curves of pure EP, random SiC/EP and bioSiC/EP composites. The flexural strengths of pure EP, random SiC/EP, and bioSiC/EP composites are 148, 185, and 222 MPa, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Wood‐Derived, Vertically Aligned, and Densely Interconnected 3D SiC Frameworks for Anisotropically Highly Thermoconductive Polymer Composites

Zhou

Wang

et al. 2022

Advanced Science

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Construction of a vertically aligned and densely interconnected ordered 3Dfiller framework in a polymer matrix is a challenge to attain significant thermal conductivity (TC) enhancement efficiency. Fortunately, many biomaterials with unique microstructures can be found in nature. With inspiration from wood, artificial composites can be rationally designed to achieve desired properties. Herein, the authors report a facile and effective approach to fabricate anisotropic polymer composites by biotemplate ceramization technology and subsequent vacuum impregnation of epoxy resin. The hierarchical microstructure of wood is perfectly replicated in the cellular biomass derived SiC (bioSiC) framework by carbothermal reduction. Owing to the anisotropic architecture of bioSiC, the epoxy composite with vertically aligned dense SiC microchannels shows interesting properties, including a high TC (10.27 W m −1 K −1 ), a significant enhancement efficiency (259 per 1 vol% loading), an outstanding anisotropic TC ratio (5.77), an extremely low coefficient of linear thermal expansion (12.23 ppm K −1 ), a high flexural strength (222 MPa), and an excellent flame resistance. These results demonstrate that this approach is expected to open a new avenue for design and preparation of high performance thermal management materials to address the heat dissipation of modern electronics.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Wood‐Derived, Vertically Aligned, and Densely Interconnected 3D SiC Frameworks for Anisotropically Highly Thermoconductive Polymer Composites

Zhou

Wang

et al. 2022

Advanced Science

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“…Catalytic effects of various types of carbon additives on polymer matrices are described, inter alia, in works [45][46][47]. Catalytic reactions of fillers are also often occurring in case of phosphoric flame retardants [48,49]. The catalytic effect stimulates accelerating the resin cross-linking process.…”

Section: Gelation Time Measurement With Atdmentioning

confidence: 99%

The Use of the ATD Technique to Measure the Gelation Time of Epoxy Resins

et al. 2021

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In this paper, we investigated the thermodynamics of the resin curing process, when it was a part of composition with graphite powder and cut carbon fibers, to precisely determine the time and temperature of gelation. The material for the research is a set of commercial epoxy resins with a gelation time not exceeding 100 min. The curing process was characterized for the neat resins and for resins with 10% by weight of flake graphite and cut carbon fibers. The results recorded in the analysis of temperature derivative (ATD) method unequivocally showed that the largest first derivative registered during the test is the gel point of the resin. The innovative approach to measuring the gelation time of resins facilitates the measurements while ensuring the stability of the curing process compared to the normative tests that introduce mechanical interaction. In addition, it was found during the research that the introduction of 10% by weight of carbon particles in the form of graphite and cut carbon fibers rather shortens the gelation time and lowers the temperature peak due to the effective absorption and storage of heat from the cross-linking system. The inhibiting (or accelerating) action of fillers is probably dependent on chemical activity of the cross-linking system.

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A Boron‐Containing Ammonium Polyphosphate for Epoxy Resins with Enhanced Flame Retardancy and Reduced Smoke Release

et al. 2023

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Epoxy resin (EP) has been widely used in coatings, adhesives, and composites. However, EP is flammable with severe smoke production. The addition of flame retardant fillers into EP can effectively improve its flame retardancy, but often brings mechanical reduction to EP. Herein, a high‐effective boron‐containing flame‐retardant (2‐phenyl‐1,3,2‐dioxaborolan‐4‐yl) methanamine ammonium polyphosphate (PBMA‐APP) is synthesized and introduced into EP to improve the fire resistance and the impact toughness. With the addition of 6% PBMA‐APP, the fire performance of EP is significantly improved. The Underwriters Laboratories‐94 rating is increased to V‐0, the total heat release and total smoke production (TSP) are reduced by 30% and 32%, respectively. It is proposed that the synergistic effect among B, N, and P in PBMA‐APP promoted the char formation of EP. The addition of 6% PBMA‐APP into EP causes little effect on tensile strength but increases the impact strength of EP to 11.2 kJ m−2. This work has proposed a possible strategy to develop a high‐efficient flame retardant for thermosetting resins.

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Flame-retardant, transparent, mechanically-strong and tough epoxy resin enabled by high-efficiency multifunctional boron-based polyphosphonamide

Cited by 184 publications

References 69 publications

Wood‐Derived, Vertically Aligned, and Densely Interconnected 3D SiC Frameworks for Anisotropically Highly Thermoconductive Polymer Composites

Wood‐Derived, Vertically Aligned, and Densely Interconnected 3D SiC Frameworks for Anisotropically Highly Thermoconductive Polymer Composites

The Use of the ATD Technique to Measure the Gelation Time of Epoxy Resins

A Boron‐Containing Ammonium Polyphosphate for Epoxy Resins with Enhanced Flame Retardancy and Reduced Smoke Release

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