A Tough Temperature-Responsive Composite for Switchable Microwave Absorption DOI
Ying Li,

Yudi Li,

Linlin Zhao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Smart microwave absorption (MA) materials that respond to environmental stimuli are highly sought after for advanced electromagnetic interference protection, particularly those with superior mechanical properties. In this study, we present a temperature-responsive composite material composed of poly(N-isopropylacrylamide) (PNIPAAm) and polyurethane (PU) sponge loaded graphene oxide (PU@GO), referred as PGPC. This exhibits switchable MA behavior below above its lower critical solution temperature (LCST). Below LCST at 20 °C, the shows minimal effectiveness (reflection loss < -10 dB), while 50 reflection significantly improves -42 dB bandwidth 3.45 GHz. Structural characterization, both in situ ex situ, reveals tunable is driven by reversible dissociation reconstruction three-dimensional (3D) network, triggered thermally induced movement PNIPAAm molecular chains grafted onto sheets. Furthermore, incorporation PU enhances composite's The ability PGPC combine performance robustness makes it promising candidate intelligent, adaptive protection material, addressing current technological needs dynamic environments.

Language: Английский

A Tough Temperature-Responsive Composite for Switchable Microwave Absorption DOI
Ying Li,

Yudi Li,

Linlin Zhao

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Smart microwave absorption (MA) materials that respond to environmental stimuli are highly sought after for advanced electromagnetic interference protection, particularly those with superior mechanical properties. In this study, we present a temperature-responsive composite material composed of poly(N-isopropylacrylamide) (PNIPAAm) and polyurethane (PU) sponge loaded graphene oxide (PU@GO), referred as PGPC. This exhibits switchable MA behavior below above its lower critical solution temperature (LCST). Below LCST at 20 °C, the shows minimal effectiveness (reflection loss < -10 dB), while 50 reflection significantly improves -42 dB bandwidth 3.45 GHz. Structural characterization, both in situ ex situ, reveals tunable is driven by reversible dissociation reconstruction three-dimensional (3D) network, triggered thermally induced movement PNIPAAm molecular chains grafted onto sheets. Furthermore, incorporation PU enhances composite's The ability PGPC combine performance robustness makes it promising candidate intelligent, adaptive protection material, addressing current technological needs dynamic environments.

Language: Английский

Citations

0