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1.06 μm近红外光的反射率,Al粉的存在可有效降低涂层在8～14 μm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1.06 μm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50 kg·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.
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