Synthesis And Application Of Novel Quaternary Ammonium Functional Polyether Block Aminopolysiloxane

With the rapid development of textile and dyeing industry, new breed fiberare ceaseless emerge in large numbers, function rises ceaselessly. Therefore,people have proposed new requirements on the textile auxiliary. In recent years,quaternary ammonium-containing polysiloxane possess textiles good softness,wettability anti-wrinkle, sterilization properties, had the broad applicationprospect. It is a popular new class of polysiloxane products. Therefore, a newtype of quaternary ammonium functional polyether block aminopolysiloxanecould be obtained, they are designed according to molecular structure andcharacteristics. The molecular structure, synthesis technics, physicochemicalproperties, film morphologye and application performance were studied andinvestigated. The detailed results are shown as follows:(1) Firstly, an intermediate epoxy polyether terminatedpolydimethylsiloxane (PESO) was synthesized by hydrosilylation of Si-Hterminated polydimethylsiloxane (PHMS) with an allyl-epoxy polyether. Thena quaternary amino-silicone polyether block aminopolysiloxan (QPBEAS) wassynthesized by reaction of PESO with α,ω-amino functional, benzyl chloride.The Chemical structure of QPBEAS was characterized by IR and1H-NMR.(2) The particle morphology, particle sizes distribution, emulsificationtechnics of QPBEAS emulsion were characterized by TEM, particle sizeanalysis and other instruments. The optimal emulsification technics were asfollows: transferring state emulsifying method, fatty alcohol-polyoxyethyleneether [m(AEO-3):m(AEO-9)=1:1] as emulsifier, the amount of compoundemulsifier is20%. The particle size was47nm and Zeta voltage was+41.4mV.The QPBEAS emulsion possessed transparent appearance, dispersibility andstability. (3) The effects of QPBEAS emulsion pH, dip-padding processes, theamount of the emulsion and baking conditions on the performance of treatmentof cotton fabrics were also studied. The results showed that the cotton fabricfeatured hydrophilicity improved, the bending rigidity of fabric decreased, andthe whiteness of the fabrics remained the same，when the pH is5.5the amountof emulsion is8g/L, the curing temperature is150℃，the curing time is50s，fabric finished by one dip one pad. The experimental results indicate a resin filmwas deposited on the fiber surface treated by QPBEAS according to the SEMimages. QPBEAS could form morphology inhormogeneous film whose surfacewas alternated light with shade, had a few small protruding exist according tothe AFM images.(4) A hydrophilic quaternary ammonium functional polyether-polysiloxanewas synthesized by the reaction of epoxy polyether terminatedpolydimethylsiloxane with tetramethylethylenediamine. The Chemical structureof HQPEAS was characterized by IR and~1H-NMR. Then the particle sizes,particle sizes distribution, charge and film morphology were investigated bytransmission electron microscope (TEM), scanning electron microscope (SEM)and other instruments. The results showed that the product was consistent withexpected molecule. The particle size of HQPEAS was21nm and Zeta voltagewas+42.5mV. untreated fabrics whose surface was rough and uneven accordingto SEM images. While HQPEAS not only caused bark striations to disappearfrom the treated cotton surface, but also conferred the treated fabric with areduced rigidity cotton fabric. HQPEAS possess more softness and thewhiteness of the fabrics remained the same to the treated fabrics. Additionally,the wettability of the treated cotton fabric was only3.46s, keep fibrous originalstyle.