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.

本工作报道了氟化环磷腈（fluorinated cyclophosphazenes）的合成与表征：该类化合物易溶于超临界二氧化碳（supercritical CO₂），可作为纺织品整理化学品应用于超临界二氧化碳沉积工艺中。
以六氯环磷腈（hexachlorocyclophosphazene）与3,3,4,4,5,5,6,6,7,7,8,8,8-十三氟-1-辛醇的醇钠进行反应。产物分析结果表明，所有原料六氯环磷腈分子均参与反应，产物主要由4-取代与5-取代的氟化环磷腈分子构成。浊点测试（cloud point measurements）证实，该产物在温和条件下可溶于超临界二氧化碳。
以超临界二氧化碳为溶剂，将氟化环磷腈涂层沉积于棉纺织品表面。扫描电子显微镜（scanning electron microscopy）观测显示，涂层分布均匀。经处理后的纺织品具备疏水性能，初始接触角为106±8度。
所得氟化环磷腈可作为构筑基元，用于进一步开发可溶于sc CO₂的磷腈类化合物，同时可作为性能更优的疏水型纺织品整理化学品。