Influence of Sulfododecenylsuccinylation on the Adhesion to Fibers and Film Properties of Corn Starch for Warp Sizing

To improve the film brittleness and adhesion to fibers of dodecenylsuccinated starch (DSS), DSS samples were sulfonated with excess NaHSO3 to prepare a series of sulfododecenylsuccinated starch (SDSS) samples with different degrees of substitution (DS). Their adhesion to fibers, surface tensions, film tensile properties and crystallinities, and moisture regains were studied. The results showed that the SDSS was superior to DSS and acid-thinned starch (ATS) in the adhesion to cotton and polyester fibers and breaking elongation of film but was inferior to them in tensile strength and degree of crystallinity of film, which revealed that sulfododecenylsuccination could further improve the adhesion of ATS to both fibers and reduce its film brittleness compared to starch dodecenylsuccination. With the increase in the DS, the adhesion to both fibers and the film elongation of SDSS gradually increased and then decreased, while its film strength consistently decreased. Considering adhesion and film properties, the SDSS samples with a DS range of 0.024-0.030 were recommended.

Automated summary

This study investigated the relationship between adhesion to fibers, surface tensions, film tensile properties and crystallinities, and moisture regains of sulfododecenylsuccinated starch (SDSS) samples with different degrees of substitution (DS). The results showed that SDSS exhibited better adhesion to cotton and polyester fibers and higher film elongation compared to dodecenylsuccinated starch (DSS) and acid-thinned starch (ATS), while it had lower film tensile strength and degree of crystallinity. The adhesion and film elongation of SDSS increased and then decreased with increasing DS, while the film strength consistently decreased. SDSS samples with a DS range of 0.024-0.030 were recommended considering adhesion and film properties.