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Monday, 16 September 2019
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Raw materials & technologies, Technologies

“Soft” polymer latexes as binders for pigment printing of cotton fabrics

Monday, 26 September 2016

A group of Chinese researchers synthesised "soft" polymer latexes by Pickering emulsion polymerisation.

"Soft” polymer latexes as binders for pigment printing of cotton fabrics. Source: Christa Nöhren/pixelio.de

"Soft” polymer latexes as binders for pigment printing of cotton fabrics. Source: Christa Nöhren/pixelio.de

O/W emulsions were prepared using monomers as oil phase, and a mixture of zinc oxide nanoparticles and polymerisable surfactants ammonium allyloxtmethylate nonylphenol ethoxylates sulfate (DNS-86) as stabilisers, and then the "soft” polymer latexes were prepared by free radical copolymerisation of monomers in oil phase of the O/W emulsions. Stabilities of both the O/W emulsions and the polymer latexes with an increase of DNS-86 were discussed. Effect of the dosages of DNS-86 on water resistance of the polymer films was reported.

Printed fabric shows excellent colour fastness

The polymer latex was applied as a binder for pigment printing of cotton fabrics. The emulsion droplets became smaller, the drop sizes became more homogeneous, and the gel contents of the polymer latexes decreased to almost constant with an increase of the DNS-86 concentration. TEM showed that some zinc oxide nanoparticles were located at the surface of the polymer particles. DNS-86 was conducive to improve water resistance of the polymer films. Fabric printed with the prepared polymer latex had smaller colour difference, improved colour fastness and excellent ultraviolet radiation shielding performance in comparison with that printed with commercial binder. However, hand feel of the cotton fabrics printed using the synthetic latex was reduced compared with that of the cotton fabrics printed using commercial binder.

The study is published in: Progress in Organic Coatings, Volume 101, December 2016, Pages 262–269

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