碳酸钙/桉木复合材料的制备及力学性能研究
Preparation and Mechanical Properties of Calcium Carbonate/Eucalyptus Composite Materials
钟昊 1林作鹏 1王亚男 1郭明辉1
作者信息
- 1. 东北林业大学 生物质材料科学与技术教育部国家重点实验室,哈尔滨 150040
- 折叠
摘要
为扩大木材在室外反光材料领域的应用,使用氯化钙、碳酸氢钠对桉木交替真空浸渍的矿化方法,模拟天然贝壳有机/无机复合结构,通过热压法制备出一系列不同碳酸钙(CaCO3)含量的碳酸钙/桉木复合材料.通过对其进行结构表征及性能测试,探究CaCO3对矿化材料结构和性能的影响.结果表明,CaCO3能够增强矿化材料的力学性能,提高其热稳定性以及对太阳光线的反射能力,降低材料受光照而发热的温度.当矿化时间低于3 d时,抗拉强度随CaCO3的含量增加而提高,最高为18.35 MPa,过程呈现多次断裂;当矿化时间达到4 d时,材料对太阳光线的反射率达到80%以上,相比原始木材自身温度降低了10℃.这种环境友好型材料在户外反光隔热领域具有一定的应用潜力.
Abstract
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.
关键词
碳酸钙/桉木/仿生矿化/光热效应/热稳定性Key words
Calcium carbonate/eucalyptus wood/bionic mineralization/photothermal effect/thermal stability引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据