摘要： 采用八氟戊醇（Ｆ_８ ）改性水性聚氨酯，制备了含氟水性聚氨酯（ＦＷＰＵ），并且通过红外光谱对 ＦＷＰＵ 的结构进行了表征。 研究了 Ｆ_８ 含量对 ＦＷＰＵ 乳液及其涂膜的影响。 研究表明，Ｆ_８ 的加入，明显提高了涂膜的耐水性能。 当 Ｆ_８ 含量为 ８％时，涂膜的吸水率从未改性的 １２.２％减少到 ３.１％，接触角从 ８０°提高到 １０８°。 乳液粒径先增大后减少，当 Ｆ_８ 含量为 ４％时，乳液粒径最大，达到 １５７ ｎｍ。ＴＧＡ 测试结果表明，改性后的 ＦＷＰＵ 涂膜热稳定性有所提高。

关键词: 八氟戊醇, 水性聚氨酯, 乳液, 改性

Abstract: A fluorinated waterbome polyurethane (FWPU) was prepared by modification of waterborne polyurethane using 2, 2, 3, 4, 5, 5-octafluoro-1-pentanol(F₈), and the structure of the prepared WPU was characterized by infrared spectroscopy. The effects of F₈ content on properties of FWPU and film thereof were investigated. The results showed that the addition of F₈ improved dramatically the water resistance of the film. When the content of Fs was 8 wt%, the water absorption decreased from 12. 2% to 3. 1%, and the contact angle of FWPU film increased from 80 °to 108°. Particle size distribution analysis indicated that the particle size of FWPU emulsion first increased then decreased. When the content of F₈ was 4 wt%, the particle size was 157 nm. TGA testing results showed that the thermal stability of the FWPU film was increased.

Key words: 2, 2, 3, 3, 4, 4, 5, 5-octafluoro-1-p, waterborne polyurethane, modified, emulsion