▎ 摘　　要

NOVELTY - A porous composite humidity sensitive material comprises 40-66 pts. wt. straw powder, 1-9 pts. wt. nano-carbon, 22-44 pts. wt. aluminum foam, 10-20 pts. wt. graphene, 1-9 pts. wt. silicon dioxide, 9-19 pts. wt. aluminum oxide, 14-20 pts. wt. copper oxide, 1-8 pts. wt. nickel oxide, 5-13 pts. wt. aqueous ammonia solution, 40-55 pts. wt. sodium chloride, 11-22 pts. wt. n-butanol, 12-20 pts. wt. polypropylene alcohol, 9-22 pts. wt. ethyl acetate, and 0.1-0.8 pt. wt. surfactant. USE - Porous composite humidity sensitive material (claimed). ADVANTAGE - The porous composite humidity sensitive material has improved moisture absorption capability, and is prepared by simple process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of porous composite humidity sensitive material, which involves (1) weighing raw materials, (2) burning straw powder to form straw ash, (3) adding silicon dioxide, aluminum oxide, copper oxide and nickel oxide into a reactor, heating and melting to obtain mixture (I), (4) adding aqueous ammonia solution into the mixture (I) to boil, adding n-butanol, polypropylene alcohol, ethyl acetate, surfactant, straw ash, nano-carbon, aluminum foam, and graphite, uniformly stirring, and spray-drying.