Synthesis and characterization of silicon‐containing arylacetylene resins‐like heat‐resistant silane coupling agents: Enhancement of interfacial properties for composites

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Abstract Silicon‐containing arylacetylene (PSA)‐based composites show excellent heat resistance and dielectric properties, making them highly promising for applications in the aerospace electronic information fields. However, low polarity of PSAs poor interfacial adhesion with fibers lead to weak mechanical properties their composites. In this study, a novel PSAs‐like heat‐resistant silane coupling agent (P‐SCA) was synthesized through Grignard reagent condensation reaction used modify surface quartz fiber (QF). Due special chemical structure P‐SCA, siloxanes P‐SCA can undergo dehydration silicon hydroxyl groups on cloths graft onto surface, while alkynes react resin, enhancing bonding by forming strong interlocking bonds. The composite prepared cloth treated 3.5 wt% ([email protected]%P‐SCA) shows that interlaminar shear strength (ILSS) flexural are 21.0 270.6 MPa at room temperature, respectively, which have increased 32.1% 63.2%, respectively. And 500°C, ILSS 9.3 131.7 MPa, increasing 44.3% 50.7%, QF@P‐SCA/PSA significantly improved maintaining resistance. Hightlights A synthesized. high temperature resistant interface is constructed agent. Mechanical occur interface. showed good elevated temperature.

Language: Английский

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Improved infrared stealth and electromagnetic interference shielding performance of polyimide‐derived carbon aerogels by constructing heterogeneous nanopores

Polymer Engineering and Science, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 8, 2025

Abstract With the rapid development of science and technology, there is an increasing demand for lightweight materials with excellent electromagnetic interference (EMI) shielding infrared stealth performance space applications. In this study, a series polyimide/silica (PI/SiO 2 ) aerogels were fabricated by blending, which dried using supercritical CO drying method. Then, PI/SiO composite carbonized to prepare carbon superior thermal insulation EMI properties. The contained mesopores enhanced interfacial resistance improved 69% when compared those samples without SiO . presence adjusted impedance matching aerogels, allowed more EM waves enter inside dissipate through multiple reflections, thereby achieving absorption‐dominant performance. This study proposed viable approach preparing PI‐based performance, show promising applications in aerospace related industries. Highlights introduction regulated microstructure aerogels. conductivity reached as low 0.10 W/mK 3 wt% aerogel was from 22.4 33.5 dB.

Language: Английский

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Development of Boron Nitride Hydroxide/Aluminum Oxide/Epoxy Resin Spheres and Graphene Oxide‐Loaded L‐Ascorbic Acid Aerogel for Enhanced Thermal Conductivity and Insulation via Hot‐Pressing

Polymers for Advanced Technologies, Journal Year: 2025, Volume and Issue: 36(2)

Published: Feb. 1, 2025

ABSTRACT Polymer composites have easy processability, low cost, and wide applicability. Moreover, arranging fillers within such polymer to form a heat transfer path plays crucial role in enhancing thermal conductivity. In this paper, were composed using boron nitride (BN), aluminum oxide (Al 2 O 3 ), reduced graphene (r‐GO), L‐ascorbic acid (L‐AA), epoxy resin (EP) (BN‐OH/Al /EP/r‐GO@L‐AA). To create BN‐OH/Al /EP spheres, Al was used as the core, with small amount of EP BN‐OH surrounding it ceramic spheres. An r‐GO@L‐AA aerogel formed by cross‐linking r‐GO L‐AA, followed freeze‐drying. The /EP/r‐GO@L‐AA fabricated hot‐pressing spheres aerogel. With vertical alignment BNs arranged according aerogel, composite achieved high conductivity 4.632 W/m K, tensile strength 65 MPa, insulating properties.

Language: Английский

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Covalent Organic Framework (COF)—Topical Game Changer for Polymeric Nanocomposites

Polymer-Plastics Technology and Materials, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 32

Published: April 10, 2025

Language: Английский

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In-situ monitoring and failure warning of coating material wear state based on interface triboelectrification

Nano Energy, Journal Year: 2024, Volume and Issue: 134, P. 110571 - 110571

Published: Dec. 10, 2024

Language: Английский

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