Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Qin, Jianyu; Zhang, Zhida

doi:10.1002/pat.4859

Cited by 9 publications

(6 citation statements)

References 55 publications

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“…After a reaction with an epoxy resin, significant improvements in the IFSS were found for both material types; however, the 1,4-triazole linker resulting from the CuAAC reaction was found to be unstable under oxidative conditions. 183 Other carbon materials, for example, graphene nanosheets 184 and nanoplatelets, 185 have also been modified with amine-terminated groups for the reinforcement of epoxy resins. Phenolic resins can be cross-linked with fillers bearing surface hydroxyl groups as demonstrated by Sandomierski, Chehimi, and colleagues.…”

Section: Applicationsmentioning

confidence: 99%

Building Tailored Interfaces through Covalent Coupling Reactions at Layers Grafted from Aryldiazonium Salts

Fitchett

Brooksby

et al. 2021

ACS Appl. Mater. Interfaces

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Aryldiazonium ions are widely used reagents for surface modification. Attractive aspects of their use include wide substrate compatibility (ranging from plastics to carbons to metals and metal oxides), formation of stable covalent bonding to the substrate, simplicity of modification methods that are compatible with organic and aqueous solvents, and the commercial availability of many aniline precursors with a straightforward conversion to the active reagent. Importantly, the strong bonding of the modifying layer to the surface makes the method ideally suited to further on-surface (postfunctionalization) chemistry. After an initial grafting from a suitable aryldiazonium ion to give an anchor layer, a target species can be coupled to the layer, hugely expanding the range of species that can be immobilized. This strategy has been widely employed to prepare materials for numerous applications including chemical sensors, biosensors, catalysis, optoelectronics, composite materials, and energy conversion and storage. In this Review our goal is first to summarize how a target species with a particular functional group may be covalently coupled to an appropriate anchor layer. We then review applications of the resulting materials.

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Section: Applicationsmentioning

confidence: 99%

Building Tailored Interfaces through Covalent Coupling Reactions at Layers Grafted from Aryldiazonium Salts

Fitchett

Brooksby

et al. 2021

ACS Appl. Mater. Interfaces

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“…Dielectric properties including dielectric constant ( D k ) and dissipation factor ( D f ) were important parameters for materials applied in ultra‐large‐scale integration 28 . D k versus frequency curves reflecting the ability of charge storage was shown in Figure 4c.…”

Section: Resultsmentioning

confidence: 99%

“…Dielectric properties including dielectric constant (D k ) and dissipation factor (D f ) were important parameters for materials applied in ultra-large-scale integration. 28 storage was shown in Figure 4c. In the operating frequency of 10 3 -10 6 Hz, the D k values of EP-0 were much higher than those of other samples.…”

Section: Mechanical and Dielectric Properties Of Cured Epmentioning

confidence: 99%

Double organic groups‐containing polyhedral oligomeric silsesquioxane filled epoxy with enhanced fire safety

Zhang

Huang

Guo

et al. 2022

J of Applied Polymer Sci

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To simultaneously improve the flame retardancy, smoke suppression, mechanical properties, and dielectric properties of epoxy resin (EP), a series of polyhedral oligomeric silsesquioxane containing vinyl and epoxy groups (EV-POSSs) was designed and successfully synthesized. The results of Fourier transform infrared (FT-IR), Nuclear Magnetic Resonance (NMR) and mass spectra indicated that the EV-POSSs possessed two main cage structures, T 10 and T 12 . The epoxy groups attaching to POSS connected the polymer main chains, forming higher crosslinking-density networks. The self-polymerization of vinyl groups under high temperatures improved the mechanical property and the quality of char residues. Based on our study, the introduction of EV-POSSs can enhance the flame retardancy, smoke suppression, mechanical and dielectric properties.Compared with pure EP, the dielectric constant of EP containing 2 wt% EV-POSS dropped from 3.9 to 3.6 at 10 6 Hz. In addition, with the 10 wt% EV-POSSs, the peak of heat release rate and total smoke production also reduced by 50.7% and 36.7%, respectively. Most notably, the maximum smoke density declined by 44.8% due to the EV-POSSs simultaneously containing epoxy and vinyl groups show comprehensive enhancement and occupy spacious applications.

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“…The relationships between dielectric loss tangent (tanδ) and frequency are shown in the Figure 9 b, which is different from that of GNPs in epoxy resin [ 39 ]. Within tested frequency, tan δ of samples containing graphite were higher than Neat DBMI, tanδ of DBMI/EDG/IL-APP, DBMI/MPGNPs/IL-APP, DBMI/EDGNPs/IL-APP decreased with the increase of frequency.…”

Section: Resultsmentioning

confidence: 99%

Graphene Nanoplatelets Hybrid Flame Retardant Containing Ionic Liquid and Ammonium Polyphosphate for Modified Bismaleimide Resin: Excellent Flame Retardancy, Thermal Stability, Water Resistance and Unique Dielectric Properties

et al. 2021

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To achieve the requirements of modified bismaleimide resin composites in electronic industry and high energy storage devices, flame retardancy, water resistance and dielectric properties must be improved. Hence, a highly efficient multifunctional graphene nanoplatelets hybrid flame retardant is prepared by ionic liquid graphite and ammonium polyphosphate. The preparation processes of the flame retardants are simple, low energy consumption and follow the green chemical concept of 100% utilization of raw materials, compared with chemical stripping. The bismaleimide resin containing 10 wt.% of the flame retardant show good flame retardancy, resulting in the limiting oxygen index increases to above 43%, and the peak heat release rate, total heat release and total smoke release decrease by 41.8%, 47.8% and 52.3%, respectively. After soaking, mass loss percentage of the modified bismaleimide resin only decreases by 0.96%, the dielectric constant of the composite increases by 39.4%, and the dielectric loss decreases with the increase of frequency. The hybrid flame retardants show multifunctional effect in the modified bismaleimide resin, due to the physical barrier, the chemical char-formation, hydrophobicity and strong conductivity attributed to co-work of Graphene nanoplatelets, ammonium polyphosphate and ionic liquid.

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Direct diazotization of graphite nanoplatelets with melamine and their favorable application in epoxy resins

Cited by 9 publications

References 55 publications

Building Tailored Interfaces through Covalent Coupling Reactions at Layers Grafted from Aryldiazonium Salts

Building Tailored Interfaces through Covalent Coupling Reactions at Layers Grafted from Aryldiazonium Salts

Double organic groups‐containing polyhedral oligomeric silsesquioxane filled epoxy with enhanced fire safety

Graphene Nanoplatelets Hybrid Flame Retardant Containing Ionic Liquid and Ammonium Polyphosphate for Modified Bismaleimide Resin: Excellent Flame Retardancy, Thermal Stability, Water Resistance and Unique Dielectric Properties

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