Supercritical carbon dioxide (scCO2) was selected as the medium for the synthesis and dyeing of four naphthalimide dyes (Y-1, Y-2, Y-3, and Y-4). They were synthesized through the reaction of 4-bromo-1,8-naphthalene dianhydride with various amines. These dyes demonstrated good photophysical properties and thermal stability, aligning with the prerequisites for scCO2 dyeing. Consequently, the scCO2 dyeing of polyester fabrics using these four dyes was investigated, and the optimal dyeing conditions were established in the range of 1820 MPa, 120130℃, and 8090 min. Surface analysis confirmed the uniform distribution of the dyes on the fabrics, with no significant damage to the fabric structure under the dyeing conditions. Additionally, the dyed fabrics exhibited good color fastness to soap washing and friction with level 4 or above. Overall, the clean preparation and dyeing of naphthalimide dyes hold promise for reducing environmental pollution.

中文翻译：

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基于萘酐的荧光黄染料在超临界二氧化碳中的清洁生产和染色


选择超临界二氧化碳 （scCO2） 作为四种萘酰亚胺染料 （Y-1、Y-2、Y-3 和 Y-4） 合成和染色的介质。它们是通过 4-溴-1,8-萘二酐与各种胺反应合成的。这些染料表现出良好的光物理性能和热稳定性，符合 scCO2 染色的先决条件。因此，研究了使用这四种染料对涤纶织物进行 scCO2 染色，并在 1820 MPa、120130°C 和 8090 min 范围内建立了最佳染色条件。表面分析证实染料在织物上分布均匀，在染色条件下对织物结构没有明显破坏。此外，染色织物表现出良好的耐肥皂洗涤和摩擦色牢度，达到 4 级或以上。总体而言，萘酰胺染料的清洁制备和染色有望减少环境污染。