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Fluoroalkyl polyacrylates can impart fabric good hydrophobicity oleophobic properties, but is difficult to wash, after once soiled fabric after finishing has therefore developed a hydrophobic oleophobic properties and excellent finishing agent decontamination effect study hot spots. Containing fluorinated polyacrylate molecules embedded polyether polyurethane segment group may resolve this issue, Based on this, the authors used molecular design principle, synthesized a new class structure of polyurethane modified fluorinated polyacrylate dirt repellent finishing agent, infrared spectroscopy (IR), NMR (1H-NMR), NMR spectra (13C-NMR), scanning electron microscopy (SEM), field emission scanning electron microscopy (FESEM), X-ray photoelectron energy dispersive spectroscopy (XPS), atomic force microscopy (AFM) instruments such as the synthesis of the structure of matter, the film-forming properties, and to study the application performance. The main research work as follows: (1) methyl acrylate, dodecafluoroheptyl ester (FA), hydroxypropyl acrylate (HPAA) is a monomer, azobisisobutyronitrile (AIBN) as initiator, in the polyurethane prepolymer (PU) The monomer reaction copolymerization, and then obtained a novel fluoroalkyl urethane modified polyacrylate (FPUA) via butanone oxime (EtAO) capped with IR, 1H-NMR and 13C-NMR, SEM of FPUA structural characterization, the film-forming observation and application performance. The results showed that the surface of the fiber, the polymer capable of forming a smooth layer and the film have excellent hydrophobic oleophobicity, after finishing can be cotton fabric with a water contact angle of 146.5 °, and the contact angle of the oil reaches 132 °; When FPUA dosage for 1.5g/100mL ethyl acetate, 100 ℃ bake 5 min 180 ° C for 2 min, high-temperature baking process, hydrophobic 95, the oleophobic Level 6, easy decontamination 4. (2) radicals in the crosslinked polyurethane prepolymerized dodecafluoroheptyl methacrylate ester (FA), acrylate, hydroxy propyl (HPAA) as monomers, by azobisisobutyronitrile (AIBN) initiator polyacrylate The body (PU), polymerization was carried out, and the hydrophilic group of the chain extender with N-methyl diethanolamine (MDEA), solution polymerization phase inversion method was a novel fluoroalkyl polyacrylate modified cationic polyurethane composite emulsion (FEPUA). IR, TEM, SEM, FEPUA structural characterization, the film-forming observation and application performance. The results show that, acetone as solvent nNCO / nOH = 1.3, and MDEA aqueous solution by the FA mass fraction of the mass fraction of 6.5%, 8% translucent blue light, good stability of the emulsion of the core - shell structure. When FEPUA emulsion dosage 2g/100mL H2O, hydrophobic 80 points, the oleophobic and easy decontamination level 4. (3) The FPUA as a film-forming substance, the carrier film material to natural cotton fiber fabrics and monocrystalline XPS, SEM, FE-SEM, AFM and other instruments, respectively, of their film-forming properties and film morphology were studied The results show that the FPUA is attached to the fiber surface fiber interface with air enriched with hydrophobic fluorine-containing segment, after the FPUA finishing the cotton fiber surface ravines, rugged disappeared on the macro into relatively homogeneous smooth morphology. Under scan range 1 × 1μm2, and observation scale of 5 nm, the FPUA are formed on the surface of the single crystal silicon film, microstructure was non-uniform, rough structure.
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