BIO-BASED THERMAL ADAPTATION COMPOSITE MATERIAL HAVING THREE-DIMENSIONAL MULTI-ELEMENT EUTECTIC STRUCTURE AND PREPARATION METHOD THEREOF

The invention discloses a bio-based thermal adaptation composite material having a three-dimensional micro-nano multi-element eutectic structure and a preparation method thereof， and belongs to the field of bio-based functional materials and building energy-saving materials. The method of the invention prepares a bio-based building energy-saving material having a three-dimensional micro-nano multi-element eutectic structure by subjecting crop straw， a thermal adaption phase-change agent， a melting point control agent， a crystallization promoter， a stabilizer， water and the like to mechanical stirring， crystallization and nucleation， encapsulation and sealing， and other processes. The invention has extensive raw material source， relatively low cost， simple production process， good product temperature control effect and long service life， can be applied to a novel energy-saving building in a large scale， creates significant economic benefits and social benefits， and complies with the requirement of using a new technology and a basic new material to upgrade a traditional industry and convert new and old kinetic energy.