Abstract:

To improve the properties of starch as sizing agent, sulfooctenylsuccinylated starch (SOSS) were prepared by reacting a series of octenylsuccinylated starch (OSS) with different degree of substitution with sodium bisulfite, respectively. The viscosity of sizing liquor, properties of sizing film and adhesion-to-fiber of OSS and SSOS were studied. The results showed that sulfooctenylsuccinylated starch is capable of improving the properties of starch film, enhancing the adhesion to polyester fiber and cotton fiber. With the increase in the degree of substitution value, the breaking elongation of sulfooctenylsuccinylated starch film increases, the tensile strength reduces, the adhesion to polyester fiber and cotton fiber first increases and then reduces. The adhesion to polyester fiber maximizes when the degree of substitution value is 0.035, and the adhesion to cotton fiber maximizes when the degree of substitution value is 0.027. Compared with OSS, sulfooctenylsuccinylated starch is enhanced both in the properties of sizing film and adhesion-to-fiber. The suitable degree of substitution value of OSS is 0.014 - 0.035 when SOSS is used as sizing agent.

Key words: sulfonation, octenylsuccinylated starch, sizing agent, degree of substitution, sizing film, adhesion property