A temperature control mica/VO functional pearlescent pigment was designed for the packaging industry. Firstly, a layer of VO nanorod film was coated on the surface of flake mica powder by hydrothermal method. Then, the surface of pure mica was modified by silane coupling agent KH-570 and sandwiched between inorganic powders to strengthen the combination. Secondly, the mica/VO composite pearlescent powder with gray-green pearlescent effect were successfully obtained by thermal annealing. The crystal structure of the VO coating and the chemical valence state of vanadium were verified by X-ray diffraction and X-ray photoelectron spectroscopy. Finally, powders were mixed with polyurethane resin to obtain a functional film. The infrared transmittance of film at 28 °C and 70 °C showed that the composite film with mica content of 3 g had greater temperature control properties, and the difference between high and low temperature transmittance was about 16%. Most importantly, the shiny decorative effect of pearlescent pigment can be still be maintained after being endowed with temperature control property. This work proposes the preparation of functional mica/VO composite with pearlescent effect and temperature control property.

中文翻译：

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温控包装用VO2纳米棒包覆云母复合珠光颜料

温控云母/VO功能性珠光颜料专为包装行业而设计。首先，采用水热法在片状云母粉表面涂覆一层VO纳米棒薄膜。然后，用硅烷偶联剂KH-570对纯云母进行表面改性，并将其夹在无机粉末之间以加强结合。其次，通过热退火成功获得了具有灰绿色珠光效果的云母/VO复合珠光粉。通过X射线衍射和X射线光电子能谱验证了VO涂层的晶体结构和钒的化学价态。最后，将粉末与聚氨酯树脂混合以获得功能膜。薄膜在28℃和70℃下的红外透过率表明，云母含量为3g的复合薄膜具有较大的温控性能，高低温透过率相差约16%。最重要的是，珠光颜料在赋予温度控制性能后，仍能保持闪亮的装饰效果。本工作提出制备具有珠光效果和温控性能的功能性云母/VO复合材料。