聚氨酯改性氟代聚丙烯酸酯的合成、表征与膜形态

Synthesis,Characterization and Film Morphology of Polyurethane Modified Fluorinated Polyacrylate

在二月桂酸二丁基锡(T-12)作用下,将1,6-已二异氰酸酯(HDI)与聚乙二醇(PEG-200)在70℃反应合成—NCO封端的聚氨酯预聚体(PU),然后滴加甲基丙烯酸十二氟庚酯(RfAA)、丙烯酸羟丙酯(HPAA)和偶氮二异丁腈(AIBN)在甲基异丁基甲酮(MIBK)溶液中聚合反应4～6 h,再经丁酮肟(EtAO)封端,制得了一种新型聚氨酯改性氟代聚丙烯酸酯易去污整理剂(FPUA)。用红外光谱(IR)、核磁共振氢谱(1H-NMR)、核磁共振碳谱(13C-NMR)、原子力显微镜(AFM)和扫描电镜(SEM)等对FPUA的结构、成膜形态及应用性能进行了研究。结果表明:FPUA在亲水性纤维织物和单晶硅表面均能形成非单一结构的疏水膜。该膜附着在纤维表面,能使处理后织物表面水的静态接触角达到146.5°,色拉油的接触角达到132°,且易去污效果良好。

In the presence of dibutyl tin dilaurate（T-12）as a catalyst,a NCO-terminated and polyether-blocked polyurethane intermediate（PU） was synthesized by reaction of the 1,6-hexamethylene diisocyante（HDI） and polyethylene glycol 200（PEG-200）,then hydroxypropyl acrylate（HPAA）,dodecafluroheptyl methacrylate（R_fAA） and azobisisobutyronitrile（AIBN） were added in the PU intermediate and copolymerized in methyl isobutyl ketone solution for 4-6 h.After the loading of —NCO blocking agent butanone oxime（EtAO） the low boiling solvent was stripped from the reaction mixture,a novel soil release finishing（agent,） polyurethane modified fluorinated polyacrylate（FPUA） with proper viscosity was obtained.The chemical structure and film morphology of FPUA were characterized and investigated by infrared spectrum（IR）,~1H nuclear resonance spectrum（~1H-NMR）,^（13）C nuclear resonance spectrum（^（13）C-NMR）,atomic force microscope（AFM）,scanning electronic microscope（SEM） and other instruments.Results indicate that FPUA can form a hydrophobic,non-homogeneous structural film on the surface of the treated fabric or（silicon） wafer,which could cause the water contact angle of the treated fabrics reaches 146.5° and the salad oil contact angle reaches 132°,and the soil release performance is excellet.