Hollow glass microspheres (HGMs) have great potential in building energy-saving and industrial insulation. Anatase TiO₂-modified HGMs were prepared by a sol‒gel method in acetic acid-ethanol solution. Scanning electron microscopy, X-ray diffraction, zeta-potential measurements, nitrogen-sorption measurements, and Fourier-transform infrared and ultraviolet-visible-near-infrared diffuse reflectance spectroscopies showed that the alkali modification of the HGMs greatly influenced the loading and microstructure of the TiO₂ film. The TiO₂ loading could be accurately controlled by ethanol addition and the TiO₂ coating time. A mechanism for the TiO₂ coating of the HGM surface is proposed. The synergistic action of hydrogen bonding and electrostatic forces resulted in close contact between the HGMs and TiO₂ sol at pH 3.5. The effects of different TiO₂ loading rates on the reflective and thermal insulation properties were studied. The near-infrared reflectance of 15.9% TiO₂ coated on HGMs was 96.27%, and the inner surface temperature of the composite pigment coated on aluminum board was reduced by 22.4 °C. The TiO₂/HGM composite pigments exhibited excellent solar reflective and thermal insulation properties, so have potential in the construction of exterior walls and roofs.

中空玻璃微球（HGM）在建筑节能和工业隔热方面具有巨大潜力。通过溶胶-凝胶法在乙酸-乙醇溶液中制备了锐钛矿型TiO ₂改性的HGM。扫描电子显微镜，X射线衍射，ζ电位测量，氮吸附测量以及傅立叶变换红外和近红外可见光漫反射光谱表明，HGM的碱改性极大地影响了HGM的负载和微观结构。 TiO ₂膜。可以通过添加乙醇和TiO ₂涂覆时间来精确控制TiO _2的负载量。TiO _2的机理提出了HGM表面的涂层。氢键和静电力的协同作用导致HGM和TiO ₂溶胶在pH 3.5时紧密接触。研究了不同的TiO ₂加载速率对反射和隔热性能的影响。涂覆在HGM上的TiO ₂的15.9％的近红外反射率为96.27％，并且涂覆在铝板上的复合颜料的内表面温度降低了22.4℃。TiO ₂ / HGM复合颜料表现出优异的阳光反射和隔热性能，因此在外墙和屋顶的建造中具有潜力。