Blue core–shell nanospheres prepared by dyeing poly(styrene‐co‐methacrylic acid) dispersions

Abstract

Blue poly(styrene‐co‐methacrylic acid) nanospheres were prepared by dyeing polymer dispersions with CI Disperse Blue 56. The coloured nanospheres had a clear shell with a thickness of 32.5 nm. The average diameter of the nanospheres increased from 288 to 353 nm, and the glass transition temperature was raised from 109.6 to 117.9 °C after coloration. Ultraviolet‐visible absorption spectra, transmission electron microscopy, and differential scanning calorimetry show that the amino and/or hydroxyl groups of the disperse dyes formed hydrogen bonds with the carboxyl groups on the surfaces of the nanospheres during the coloration process, resulting in increased particle sizes and shell layers. The dye content increased almost linearly with increasing dye concentrations or dyeing temperatures within a certain range. By increasing the pH of the dyeing bath from 4 to 5, the dye content increased sharply from 0.68 to 1.49% because of the ionisation of the carboxyl groups of the macromolecules.

Effect of Cotton Cationization Using Copolymer Nanospheres on Ink-Jet Printing of Different Fabrics

“…The DSC curve of the P(St-BA-VBT) nanospheres was illustrated in Figure 3d. Obviously, the glass transition temperature ( T g) of the nanospheres was 94.7 °C, indicating that the nanospheres could be applied to the cationization modification of cotton fabrics and avoid the uneven ink-jet printing phenomenon of cotton fabric [28].…”

Inkjet Printable and Self-Curable Disperse Dyes/P(St-BA-MAA) Nanosphere Inks for Both Hydrophilic and Hydrophobic Fabrics

“…As shown in Figure 1a, the P(St-BA-MAA) nanospheres synthesized by the emulsifier-free emulsion polymerization had homogeneous core-shell spherical shape with an average size of 374.1 nm. In Figure 1b, the morphology of disperse dyes/P(St-BA-MAA) nanospheres (named as DPN) did not change evidently after coloration, but the average diameter increased to 394.7 nm, 20.6 nm larger than the uncolored ones resulting from the interaction between dyes and nanospheres [11,28].…”

“…The maximum absorption wavelengths of C. I. disperse red 60, C. I. disperse blue 60, and C. I. disperse yellow 114 in DMF solution are 521, 656, and 442 nm, respectively. The dye content of the colored nanosphere was calculated using Lambert–Beer’s law [28]. According to the standard curve of disperse dyes, the amount of disperse dyes in the composite nanospheres was obtained.…”

Amino-modified Reactive Red 195/P(styrene-co-butyl acrylate-co-trimethyl(vinylbenzyl) ammonium chloride) nanospheres with high coloration performance for enhancing cotton dyeability

“…This phenomenon may be caused by a large number of dye molecules adsorbed on the polymer nanosphere surface, which increases the size of the polymer nanospheres and makes the zeta potential become negative. 27,44 The size, zeta potential, FTIR, and XPS analysis of the Am-RPNs…”