Highly anisotropic MXene@Wood composites for tunable electromagnetic interference shielding

•MXene@wood shows anisotropic electrical, dielectric, and electromagnetic shielding properties.•MXene@wood displays a better impedance match in the tangential-section than cross-section.•MXene@wood in the tangential-section can respond to the change of the angle between wood grain and electric field.•An off/on switchable electromagnetic shielding property is realized by rotating the tangential-section of MXene@wood.