Organic pigments are a commonly used colorant with various applications and promising prospects. However, the implement of organic pigments is hindered by poor dispersion stability and unsatisfactory weather resistance. Herein, encapsulated pigments are obtained via a facile dispersion approach and subsequent soap-free miniemulsion polymerization. The reactive emulsifier acting as dispersant and emulsifier in the polymerization integrates advantages of covalent bonding and steric hindrance effect, reducing the residue of excess reagents and improving the stability of pigment dispersion. Due to the interaction between polymers and the dispersants on the pigment surface, as well as the shielding effect of polymer in the core-shell structure, the soap-free nano-pigment composite particles exhibit better dispersion stability, enhanced weather resistance, superior rubbing fastness performance and anti-ultraviolet intrusion ability. In addition, the as-prepared nanocomposite could be applied to flat screen printing, inkjet printing, handwriting and other applications, significantly expanding the practical application value of pigments.

有机颜料是一种常用的着色剂，用途广泛，前景广阔。然而，有机颜料的分散稳定性差和耐候性不令人满意，阻碍了其实施。在此，包封颜料是通过简便的分散方法和随后的无皂细乳液聚合获得的。在聚合中作为分散剂和乳化剂的反应性乳化剂综合了共价键和位阻效应的优点，减少了过量试剂的残留，提高了颜料分散的稳定性。由于聚合物与颜料表面分散剂的相互作用，以及聚合物在核壳结构中的屏蔽作用，无皂纳米颜料复合颗粒表现出更好的分散稳定性，增强的耐候性，优越的摩擦牢度性能和抗紫外线侵入能力。此外，所制备的纳米复合材料可应用于平面丝网印刷、喷墨印刷、手写等应用，显着扩大了颜料的实际应用价值。