Multiscale Structure Coordinated Poly(Ether Ether Ketone)-Based Black Absorber with Wide-Angle High Absorption Properties

Black absorber with wide-angle high absorption properties is of great significance to the in-orbit operation of space optical system. However, up to now, black absorber used in space optical system with wide-angle high absorption properties has rarely been reported. Herein, this work reports a multiscale structure coordinated black poly(ether ether ketone) (PEEK)-based black absorber with lightweight, low volatilization, and wide-angle high absorption properties through 3D printing method. The as-prepared absorber with honeycomb structure shows a high surface absorptivity (about 96.89%), and excellent wide-angle high absorption properties which absorptivity attenuation rate is only 1.43% at 70 degrees, benefiting from 3D-printed honeycomb structure and multi-scale light trap structure on the absorber inner surface. Besides, high and low temperature cycling test shows that its wide-angle high absorption properties have a good stability at the space extreme environment, and its collected volatile condensable material (CVCM) is as low as 0.00%. This work provides a new strategy for simple fabrication method of novel lightweight multifunctional-structure integrated absorber for space optical system.