论文部分内容阅读
以Al粉与Sm2O3为复合颜料,聚氨酯(PU)为黏合剂,制备了Al-Sm2O3/PU复合涂层。系统研究了涂层的微结构、红外发射率、近红外反射性能及力学性能。研究结果表明:Sm2O3的存在可有效降低涂层对1.06μm近红外光的反射率,Al粉的存在可有效降低涂层在8~14μm波段的红外发射率。通过调节Al粉与Sm2O3质量比,涂层在8~14μm波段的红外发射率可在0.556~0.834范围内调节,涂层对1.06μm近红外光的反射率可在35.1%~57.7%范围内调节。所制备Al-Sm2O3/PU涂层具备优良的力学性能,在不同Al-Sm2O3质量比下,其附着力与耐冲击强度分别可达到1级和50kg·cm。Al-Sm2O3/PU复合涂层有望成为一种新型的具备低近红外光反射率与优良力学性能的低红外发射率涂层材料。
Al-Sm2O3 / PU composite coatings were prepared with Al powder and Sm2O3 as composite pigments and polyurethane (PU) as binder. The microstructure, infrared emissivity, near-infrared reflectance and mechanical properties of the coatings were investigated systematically. The results show that the presence of Sm2O3 can effectively reduce the reflectivity of the coating to 1.06μm near-infrared light, and the presence of Al powder can effectively reduce the infrared emissivity of the coating in the band of 8 ~ 14μm. By adjusting the mass ratio of Al powder and Sm2O3, the infrared emissivity of the coating in the wavelength range of 8 ~ 14μm can be adjusted in the range of 0.556 ~ 0.834, the reflectivity of the coating to 1.06μm near infrared can be adjusted in the range of 35.1% ~ 57.7% . The prepared Al-Sm2O3 / PU coating has excellent mechanical properties, and the adhesion and impact strength of the Al-Sm2O3 / PU coating can reach 1 and 50kg · cm at different mass ratios of Al-Sm2O3, respectively. Al-Sm2O3 / PU composite coating is expected to become a new type of low infrared emissivity coating material with low near-infrared light reflectance and excellent mechanical properties.