碳酸钙/桉木复合材料的制备及力学性能研究OA北大核心

To expand the application of wood in the field of outdoor reflective materials,a series of calcium carbonate/eucalyptus wood composite materials with different calcium carbonate(CaCO3)contents were prepared by hot pressing method using the mineral-ization method of alternating vacuum impregnation of eucalyptus wood with calcium chloride and sodium bicarbonate to mimic the or-ganic/inorganic composite structure of natural pearl layer.The effects of CaCO3 on the structure and properties of the mineralized mate-rials were investigated through structural characterization and performance tests.The results showed that CaCO3 could enhance the me-chanical properties of the mineralized material,improve its thermal stability and reflective ability to sunlight,and reduce the tempera-ture at which the material was heated by light.When the mineralization time was lower than 3 days,the tensile strength increased with the increase of CaCO3 content,up to 18.35 MPa,and the fracture process showed multiple fracture;when the mineralization time reached 4 days,the material's reflectance of sunlight reached more than 80%,which reduced the temperature of the original wood by 10℃compared with the original wood itself.This environmentally friendly material has a certain application potential in the field of outdoor reflective insulation field.