Investigation of magnesium hydroxide functionalized by polydopamine/transition metal ions on flame retardancy of epoxy resin

Zhu, Dandan; Bi, Qingqing; Yin, Guang‐Zhong; Jiang, Yan; Fu, Wanlu; Wang, Na; Wang, De‐Yi

doi:10.1007/s10973-022-11467-5

Cited by 11 publications

(7 citation statements)

References 48 publications

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“…40 It was worth noting that the diffraction angles at which their peaks were located did not change significantly, which indicated that the synthesis of the modifier did not have a significant effect on the crystal structure of CF. 41 The modification process of CF was carried out on the surface of CF, and it did not damage the strength and structure of CF itself. These results indicated that CF, CF-PDA, and CF-PDA-M were amorphous.…”

Section: Xrd Analysis Of Hybridized Materialsmentioning

confidence: 99%

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Zhao,

Chen,

Zhang

et al. 2024

Polymers for Advanced Techs

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CF‐PDA‐M hybrid fillers are prepared by three metal cations (M) assisting polydopamine (PDA) through Fe3+, Ni2+, and Al3+. The metal cations promote the polymerization of PDA on the fiber surface, shorten the modification time of the fibers, and ensure that the short‐cut carbon fibers (CF) do not agglomerate during water bath stirring while keeping the structure of the CF undamaged, which is a green and efficient method. After PDA modification, the roughness and surface activity of the fiber surface increase. Finally, CF‐PDA‐M is used as a filler and added to neoprene latex and natural latex, which are prepared into composites by wet blending, and the CF are characterized by different techniques. The results show that the hydroxyl and amino groups on the surface of CF‐PDA‐M increase the cross‐linking density of the composites, establish a good stress cross‐linking network, shorten the vulcanization time, effectively prevent the agglomeration phenomenon of the CF in the rubber, and improve the dispersion of the CF in the composite. After modification, the tensile strength and 300% constant tensile strength of CF‐PDA‐M increase by more than 10% and 30%, respectively, over CF composites, and the rolling resistance is reduced. This study provides a new and effective strategy for CF surface functionalization, which improves the processing efficiency and mechanical properties of rubber products and has a broad application prospect in the rubber industry.

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Section: Xrd Analysis Of Hybridized Materialsmentioning

confidence: 99%

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Zhao,

Chen,

Zhang

et al. 2024

Polymers for Advanced Techs

View full text Add to dashboard Cite

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“…They observed that the PDA coating exhibited excellent stability in produced water from oil wells and maintained stable anticorrosion performance under high-temperature conditions. Zhu et al 32 enhanced the corrosion resistance of magnesium alloy using PDA and found that the combined use of PDA with organic coatings exhibited a synergistic effect, resulting in a decrease in the corrosion rate of the metal substrate. Habibiyan et al 22 successfully established GO-PDA-Zn/EP composite coating on the GO network framework, improved the anticorrosion performance of the steel, and explored the anticorrosion mechanism and self-healing performance of the composite.…”

Section: Introductionmentioning

confidence: 99%

Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn₂SiO₄/PDA Composite

Huang,

Zhao,

Liu

et al. 2024

ACS Appl. Eng. Mater.

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Zinc silicate (Zn 2 SiO 4 ) is often used as an epoxy resin filler but is prone to damage over time, which limits its applicability. Herein, mussel-inspired polydopamine (PDA) was utilized for the capabilities of adhesion and self-healing, and Mn was doped, successfully prepared the Mn−Zn 2 SiO 4 /PDA composite, and incorporated as a filler in epoxy resin to form composite coatings. Electrochemical impedance spectroscopy testing demonstrated that after 168 h of saltwater immersion experiment, the total impedance value of the Mn−Zn 2 SiO 4 /PDA composite coating is 723.1% of that of the blank epoxy resin coating, improving the corrosion resistance of epoxy resin. Additionally, the anticorrosion mechanisms of the Mn− Zn 2 SiO 4 /PDA composite were attributed to the self-healing properties effect, shielding effect, and multivalent Mn ions magnetic induction effect. This study opens up an avenue for the development of epoxy resin composite coatings in the field of anticorrosion.

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“…However, polystyrene is easy to burn when heated, which will release toxic gases and a large amount of smoke, and can melt, drip, and flow in the combustion process, thus making the fire spread. Therefore, it is imperative to improve the flame retardant performance of polystyrene. − According to the flame retardant system, it mainly includes mineral flame retardant, halogen flame retardant, phosphorus flame retardant, silicone flame retardant, biobased flame retardant, and so on. − Among them, halogen flame retardants are all the rage, but they are prohibited because of their toxicity and bioaccumulation. ,,− Phosphorus flame retardants have attracted much attention because of their excellent flame retardant efficiency and environmental friendliness, and have gradually become one of the research hotspots in today’s society. ,,,− Phosphorus flame retardants mainly include ammonium polyphosphate, aluminum hypophosphite, 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOPO) and its derivatives. ,,,, Phosphorus flame retardants will produce phosphoric acid or similar substances during thermal degradation, which can inhibit the combustion process of the condensed phase. In addition, PO · radicals produced by phosphorus flame retardants have a gas phase flame retardant effect. ,, …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of a Novel DOPO-Based Flame Retardant Intermediate and Its Flame Retardancy as a Polystyrene Intrinsic Flame Retardant

Dong,

Wang,

Liu

et al. 2023

ACS Omega

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The research on intrinsic flame retardant has become a hot topic in the field of flame retardant. The synthesis of reactive flame-retardant monomer is one of the effective methods to obtain an intrinsic flame retardant. In addition, in view of the small molecular flame retardant easily migrates from the polymer during the use process, which leads to the gradual reduction of the flame retardant effect and even the gradual loss of flame retardant performance, and the advantages of atom transfer radical polymerization (ATRP) technology in polymer structure design and function customization, we first synthesized reactive flame retardant monomer 6-(hydroxymethyl)dibenzo[c,e][1,2]oxaphosphinine 6-oxide (FAA-DOPO), then synthesized polystyrene bromine (PS 148 -Br) macromolecular initiator by ATRP technology, and finally obtained block copolymer polystyrene- b -poly{6-(hydroxymethyl)dibenzo[c,e][1,2]oxaphosphinine 6-oxide} (PS- b -PFAA-DOPO) by the polymerization of FAA-DOPO initiated by macromolecular initiator PS 148 -Br by ATRP technology. The chemical structure of FAA-DOPO was characterized by 1D and 2D NMR ( 1 H, 13 C, DEPT 135, HSQC, COSY, NOE, and HMBC) spectra, Fourier transform infrared spectroscopy (FTIR), liquid chromatography-tandem mass spectrometry (LC–MS) and X-ray photoelectron spectroscopy (XPS). The chemical structure and molecular weight of PS- b -PFAA-DOPO were characterized by FTIR and gel permeation chromatography (GPC). The thermal and flame-retardant properties of PS- b -PFAA-DOPO were characterized by thermogravimetry analysis (TG), UL-94, limiting oxygen index (LOI), and microscale combustion calorimetry (MCC). It was found that FAA-DOPO could be used as a monomer for polymerization, although FAA-DOPO had a large steric hindrance from the chemical structure of FAA-DOPO, the UL-94 grade of PS- b -PFAA-DOPO reached the V-0 grade, and the LOI increased by 59.12% compared with PS 148 -Br.

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Investigation of magnesium hydroxide functionalized by polydopamine/transition metal ions on flame retardancy of epoxy resin

Cited by 11 publications

References 48 publications

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn₂SiO₄/PDA Composite

Synthesis and Characterization of a Novel DOPO-Based Flame Retardant Intermediate and Its Flame Retardancy as a Polystyrene Intrinsic Flame Retardant

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Investigation of magnesium hydroxide functionalized by polydopamine/transition metal ions on flame retardancy of epoxy resin

Cited by 11 publications

References 48 publications

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Improving interface performance between the fibers and rubber using metal cations synergistic polydopamine to modify carbon fibers

Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn2SiO4/PDA Composite

Synthesis and Characterization of a Novel DOPO-Based Flame Retardant Intermediate and Its Flame Retardancy as a Polystyrene Intrinsic Flame Retardant

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Improving the Anticorrosion and Self-Healing Properties of the Epoxy Coating Using the Mn–Zn₂SiO₄/PDA Composite