JOURNAL OF TEXTILE RESEARCH ›› 2012, Vol. 33 ›› Issue (11): 66-71.

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Synthesis of nano-SiO2/PSt via miniemulsion polymerization and modification of polyacrylate sizing with it

  

  • Received:2011-10-12 Revised:2012-07-04 Online:2012-11-15 Published:2012-11-20

Abstract: Nano-SiO2 particles were prepared via Sol-Gel method and then they were coupled with MPS. Miniemulsion polymerization, using styrene as monomer, CTAB as emulsifier and cyclohexane as costabilizer, was processed to prepare nano-SiO2/PSt microspheres. A series of nano-SiO2/PSt miniemulsion, with different stability and particle size, were prepared with different contents of emulsifier. Nano-SiO2 and nano-SiO2/PSt were characterized by means of FTIR, DLS and TEM. The results showed that: The average particle size of MPS-modified Nano-SiO2 was 38.7 nm; when the content of CTAB was 0.035 g, the prepared miniemulsion, with an average particle size of 148.8 nm, had a good stability and a narrow particle size distribution. Then the prepared miniemulsion was charged into the polyacrylate sizing agent SX-5 to form the nano-modified SX-5. The viscosities of SX-5 and nano-modified SX-5 were determined. Finally, T/C blended single yarns were sized by these two sizing agents, and breaking strength, breaking elongation and abrasion resistance of sized yarns were examined. The results showed that: There was tiny difference of viscosity between SX-5 and nano-modified SX-5, but the sizing rate of nano-modified SX-5 improved 8.9 %; Sizing properties of T/C yarns sized by nano-modified SX-5 improved in comparison with SX-5, since breaking strength, breaking elongation and abrasion resistance improved 4.7 %, - 6.5 % and 7.0 % respectively.

Key words: sol-gel method, nano-SiO2, miniemulsion polymerization, sizing agent, sizing

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