New fluorinated cyclophosphazenes: synthesis, properties, applications

The work presents the synthesis and characterization of fluorinated cyclophosphazenes, which are readily soluble in supercritical CO₂ and can be used as textile finishing chemicals in a supercritical CO₂ deposition process. The reaction of hexachlorocyclophosphazene with sodium alcoholate of 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-1-octanol was performed. The reaction product analysis suggested that all parent hexachlorocyclophosphazene molecules participated in the reaction, 4- and 5-substituted fluorinated cyclophosphazene molecules comprised most of the reaction product. Cloud point measurements confirmed that the product is soluble in supercritical CO₂ at moderate conditions. Fluorinated cyclophosphazene coating was deposited from solutions in supercritical CO₂ onto cotton textile. Scanning electron microscopy revealed that the coating is deposited uniformly. The textile after treatment was hydrophobic with an initial contact angle of 106 ± 8 degrees. The obtained fluorinated cyclophosphazenes can be considered as building blocks for the further development of phosphazenes that are soluble in sc CO₂ and can be used as hydrophobic finishing chemicals with improved properties.

本研究针对氟化环磷腈类化合物开展了合成与表征工作：该类化合物易溶于超临界二氧化碳（supercritical CO₂），可作为纺织品整理剂应用于超临界二氧化碳沉积工艺。本研究开展了六氯环磷腈（hexachlorocyclophosphazene）与3,3,4,4,5,5,6,6,7,7,8,8,8-十三氟-1-辛醇醇钠的亲核取代反应。产物分析结果显示，所有原料六氯环磷腈分子均完全参与反应，反应产物主要以4-取代与5-取代的氟化环磷腈类化合物为主。浊点测试（cloud point measurements）证实，该产物在温和条件下可稳定溶解于超临界二氧化碳。研究以超临界二氧化碳为反应介质，通过沉积工艺将氟化环磷腈涂层涂覆至棉纺织品表面。扫描电子显微镜（Scanning Electron Microscopy, SEM）表征结果显示，该涂层在织物表面均匀沉积。经该涂层处理后的纺织品具备优异疏水性能，初始接触角为106 ± 8°。本研究所得的氟化环磷腈类化合物可作为结构砌块，用于开发可溶于超临界二氧化碳、且可作为性能优化的疏水纺织品整理剂的新型环磷腈类材料。