| Finishing of water-repellent and oil-repellent was an important process of textile finishing, the textile of water-repellent and oil-repellent finishing agent is developing faster and faster, and is used more and more widely. Because of its excellent performances of water-repellent, oil-repellent and antifouling, the finishing agents with fluorine are widely applied in the functional finishing field. introducing siloxane by mean of emulsion polymerization into side chain of fluoropolymer, could enhance its cross-linking film performance, and obtained excellent water and oil repellence, good softness of the treated fabric. In this paper, the fluorosilicon acrylate copolymer was synthesized and adjusted the length of the alkane chain, in order to improve the water- and oil-repellent abilities of finishing agent containing fluorine and silicone.The main research contents are listed as follows.First of all, a series of polymer containing fluorine and silicone by using monomers of dodecafluoroheptyl methacrylate(G04), triethoxyvinylsilane(KH-151) and various lengths of side chains of n-alkyl methyl acrylates(MAs, n=1, 2, 4, 8 and 12) were synthesized by semi continuous emulsion polymerization. The copolymer crystallization were analyzed via X-ray Diffraction(XRD). The results showed that the copolymer is mainly crystallized with fluorine-containing sidechains, the degree of ordered packing of the fluorine-containing side chains at the surface is promoted by long side-chain alkanes.The polyacrylate latex containing fluorine-silicone was synthesized by employing dodecafluoroheptyl methacrylate(G04), triethoxyvinylsilane(KH-151), lauryl methlacrylate(LMA) and methyl methacrylate(MMA) as reactive monomers. The influences of four reactive emulsifiers and two conventional emulsifiers on the properties of water and oil repellency of the finishing agent containing fluorine and silicone were discussed. The properties of soap free water- and oil-repellent agent performed well compared with the one from conventional emulsifiers, and the properties of fluorosilicone finishing agent were optimum when DNS-86 and DNS-1035 were mixed.The fluorosilicon modified acrylate soap-free latexes was synthesized by soap-free emulsion polymerization with LMA and MMA as based monomers, G04 and KH-151 as modified monomers, the DNS-86/DNS-1035 and K2S2O8(KPS) were employed as mixed emulsifier and water soluble initiator, respectively. the obtained finishing agent was characterized by Fourier transform infrared spectrometer(FT-IR). The influences of quantity of monomers, emulsifying agents and initiator to stability of emulsion and waterand oil-repellency were analyzed, the optimum polymerization conditions of synthetic fabric finishing agent were obtained: content of functional monomers emulsifying agents(DN3-86:DNS-1035=2:1) and initiator were 60%, 1.6%, 1.0%, respectively.The polyacrylate emulsion containing fluorine and silicone with core-shell structure were synthesized by soap-free emulsion polymerization with LMA and MMA in the core and G04, KH-151 and LMA in the shell. The structure and physical properties of copolymers were characterized by infrared spectrometer(FT-IR), scanning electron microscopy(SEM) and thermogravimetric analysis(TGA), etc. The influences of the ratio and the amount of monomers were were studied. The cotton fabrics treated by copolymer exhibited good water- and oil-repellent with water static contact angle of 138.7°, hydrostatic pressure reached 2.87 KPa, oil-repellency rating of 4. |
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