2022
DOI: 10.1021/acssuschemeng.2c04181
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Chitosan–Fe(III) Complexes via Green Preparation toward Flame Retardant and High-Mechanical-Strength Epoxy Composites

Abstract: Biobased flame retardants with facile preparation, high performance in smoke suppression, and mechanical reinforcement toward epoxy resins are worth exploring for feasible sustainability. Although some chitosan-containing flame retardants have been successfully developed so far, the synthesis processes for most of them require the use of large volumes of organic solvents and give low synthetic yields. Herein, we report a facile, green, and high-yielding strategy for the synthesis of chitosan−metal complex flam… Show more

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Cited by 22 publications
(9 citation statements)
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“…[10] Furthermore, the FTIR spectra show that the characteristic peaks of the v C=O of acetylamino groups and δ NÀ H of amino groups in Zn-CTS display a red shift in comparison to SS-CTS (Figure S4c), which also provides evidence of coordination between Zn 2 + and amino groups. [11] XRD analysis shows that two monoclinic crystal systems of SS-CTS are located at 20.5°and 10.8°, while the peak at 20.5°weakens and the peak at 10.8°disappears in Zn-CTS (Figure 1i). This is because the coordination of Zn 2 + disrupts the regular arrangement of chitosan chains, leading to the formation of an amorphous structure.…”
Section: Resultsmentioning
confidence: 99%
“…[10] Furthermore, the FTIR spectra show that the characteristic peaks of the v C=O of acetylamino groups and δ NÀ H of amino groups in Zn-CTS display a red shift in comparison to SS-CTS (Figure S4c), which also provides evidence of coordination between Zn 2 + and amino groups. [11] XRD analysis shows that two monoclinic crystal systems of SS-CTS are located at 20.5°and 10.8°, while the peak at 20.5°weakens and the peak at 10.8°disappears in Zn-CTS (Figure 1i). This is because the coordination of Zn 2 + disrupts the regular arrangement of chitosan chains, leading to the formation of an amorphous structure.…”
Section: Resultsmentioning
confidence: 99%
“…The pyrolysis products of DTEP-5 and DGEBA were compared at different times for the purpose of better understanding the role of DTEP in the thermal degradation of EP . The total pyrolysis product release curves are depicted in Figure e, which indicates that the pyrolysis of DGEBA can be divided into two stages (first peak at 40 min and second peak at 75 min).…”
Section: Resultsmentioning
confidence: 99%
“…For clarity, the smoke suppression behaviors of chitosan-based flame-retardant-modified EP composites are also shown in Figure 8. 21,[34][35][36] The results show that CCDmodified EP exhibited the highest ΔTSP (%) and ΔpSPR (%), indicating that CCD has good smoke suppression function toward EP.…”
Section: Cone Calorimetry Testmentioning
confidence: 99%
“…With an optimal addition amount of 9 wt%, the epoxy composite achieves UL-94 V-1 rating and limiting oxygen index (LOI) value of 29.5%, indicating good flame retardancy. 21 This study aims to develop an eco-friendly flame retardant that can address the limitations in the sustainable development of EP. The novel flameretardant CCD was synthesized using CS, DOPA, and cobalt salt, followed by the preparation of the EP composite doped with CCD.…”
Section: Introductionmentioning
confidence: 99%
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