Impacts of Goat Horn/Ammonium Polyphosphate on Mechanical and Thermal Properties of Epoxy Composites

Engineering Reports, Journal Year: 2025, Volume and Issue: 7(2)

Published: Feb. 1, 2025

ABSTRACT In this paper, the ammonium polyphosphate (APP) is mixed with epoxy to fabricate APP/epoxy goat horn composites. The composites were obtained by casting method different weight ratios of APP 0%, 10%, 15%, and 20% for improving mechanical thermal properties. This first paper discuss about both properties evaluated tensile test wear test. For a content 20 wt% APP, strength was 30 MPa, shows that adding led having better strength. From limiting oxygen index results, it clear composite fire retardant, fire‐retardant value improves addition up ratio 15% APP. thermogravimetric analysis (TGA) reveals degradation in relation temperature. TGA analysis, bio without gives results comparing incorporation 40% loss. At same time, 50% loss occur at temperature around 380°C It stability ignition time from horizontal flammability 0, 10, 15, 20, 22, 24, 25 (in s) respectively. filler material into composites, also increases. water absorption percentage peak lower 10% All samples saturated after 80 h. can be attributed improved interfacial bonding between fibers matrix. scanning electron microscopy (SEM) morphological structure dispersion particles studied.

Language: Английский

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Sustainably sourced epoxy thermal management composites with simultaneously improved thermal conductivity, dielectric properties and fire safety

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: 508, P. 161023 - 161023

Published: Feb. 26, 2025

Language: Английский

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An Engineered Heterostructured Trinity Enables Fire-Safe, Thermally Conductive Polymer Nanocomposite Films with Low Dielectric Loss

Nano-Micro Letters, Journal Year: 2025, Volume and Issue: 17(1)

Published: Feb. 26, 2025

Abstract To adapt to the trend of increasing miniaturization and high integration microelectronic equipments, there is a demand for multifunctional thermally conductive (TC) polymeric films combining excellent flame retardancy low dielectric constant ( ε ). date, have been few successes that achieve such performance portfolio in polymer due their different even mutually exclusive governing mechanisms. Herein, we propose trinity strategy creating rationally engineered heterostructure nanoadditive (FG@CuP@ZTC) by situ self-assembly immobilization copper-phenyl phosphonate (CuP) zinc-3, 5-diamino-1,2,4-triazole complex (ZTC) onto fluorinated graphene (FG) surface. Benefiting from synergistic effects FG, CuP, ZTC bionic lay-by-lay (LBL) strategy, as-fabricated waterborne polyurethane (WPU) nanocomposite film with 30 wt% FG@CuP@ZTC exhibits 55.6% improvement limiting oxygen index (LOI), 66.0% 40.5% reductions peak heat release rate total release, respectively, 93.3% increase tensile strength relative pure WPU between ZTC. Moreover, presents thermal conductivity λ ) 12.7 W m −1 K 2.92 at 10 6 Hz. This work provides commercially viable rational design develop high-performance films, which hold great potential as advanced dissipators high-power-density microelectronics.

Language: Английский

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Preparation of Thermally Conductive and Flame Retardant Epoxy Composites from Polyethylenimine–Boron Nitride Skeleton and Phosphate Ester Hyperbranched Flame Retardant

Langmuir, Journal Year: 2025, Volume and Issue: unknown

Published: March 11, 2025

In the electronics field, demand for polymer-based interface materials with high thermal conductivity is increasing. this study, a three-dimensional thermally conductive framework was fabricated using bidirectional freezing technique, incorporating hexagonal boron nitride (h-BN) as primary filler and polyethylenimine (PEI) binder. Moreover, phosphate ester hyperbranched flame retardant (DTFR) synthesized. It miscible epoxy (EP) prepolymer, allowing to be immersed into skeleton along EP prepolymer. The of composites increased 1.35 W m–1 K–1 by introducing only 12.5 vol % h-BN, exhibiting an increase 744% compared that control EP. addition, peak heat release rate total containing 4% DTFR significantly reduced 41.5 34.9%, respectively, limiting oxygen index improved from 23.7 31.5% This work believed provide interesting promising strategy preparing good conductivity, homogeneous fire safety, low dielectric constant, loss.

Language: Английский

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Construction of flame-retardant and recyclable tung oil-based polyurethane composite foam: A green way to comprehensive utilization

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161433 - 161433

Published: March 1, 2025

Language: Английский

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