▎ 摘　　要

NOVELTY - Photo-responsive nano composite material, is claimed. The composite material is uniform dispersion liquid obtained by mixing organic precursor, initiator, cross-linking agent, photosensitizer and a light absorbing material solvent, where the mass ratio of the organic precursor, initiator, cross-linking agent, photosensitizer and light absorbing material solvent is (0.8-1.25): (0.022-0.066): (0.9-2): (0.6-1.2). The light absorbing material solvent is formed by uniformly dispersing a light absorbing material at a nanometer level in the solvent, the mass ratio of the light absorbing material at the nanometer level in the light absorbing material solvent is 0.1-5 wt.%, and the nanometer level means that the size of at least one dimension in the three-dimensional direction is ≤ 100 nm. USE - The composite material is useful for micro-nano 4D printing field. ADVANTAGE - The composite material: has high-efficiency; improves the response speed and execution speed of the micro-nano intelligent structure under light stimulation and design freedom of the micro-nano intelligent structure deformation structure. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the photo-responsive nano composite material, comprising (i) adding a light absorbing material in a nanometer level into a solvent, carrying out ultrasonic stirring to obtain a uniformly mixed solution, then, centrifuging the mixed solution to remove impurities and undissolved large particle size block to obtain a pure light absorbing material solvent without particle impurities, and then, mixing the organic precursor, initiator, cross-linking agent, photosensitizer and light absorbing material solvent, and carrying out ultrasonic treatment to obtain the final product; and a micro-nano 4D printing using the light-responsive nano-composite material comprising (i) subjecting the cleaned and dried substrate to a surface treatment, (ii) dropping the photo responsive nano composite material on a substrate, (iii) using the laser direct writing mode to carrying out three-dimensional micro machining on the photo responsive nanometer composite material, (iv) taking out the processed sample, developing, dripping deionized water on the developed sample to obtain the micro-nano structure for laser direct writing printing, and (v) applying the focused laser stimulation signal on a micro-nano structure for laser direct writing printing to realize photo responsive actuation.