Gradient-Nested Organic/Inorganic Aerogels Achieve High Mechanical Strength and Feedback-Tunable Microwave Absorption.

ABSTRACT: The integration of multiband and multimode systems has substantially increased the complexity of electromagnetic interference, revealing critical limitations of existing absorbers in tuning efficiency and structural resilience. Here, we propose a nested microaerogel strategy to simultaneously improve the mechanical strength and microwave absorption (MA) performance of polyimide (PI) aerogel. By incorporating pomelo-peel-derived cellulose micronetworks and helical carbon nanocoil microaerogels to construct a gradient-nested framework, the long-standing issues of filler agglomeration and structural shrinkage in aerogels are effectively resolved. The aerogel combines low density, impact resistance, and thermal insulation with remarkable MA performance. The compressive strength reaches 1.3 MPa

SUBMITTER: Liu X 

PROVIDER: S-EPMC12799915 | biostudies-literature | 2026

REPOSITORIES: biostudies-literature