Effect of carboxymethyl chitosan on the properties of soybean oil body-carboxymethyl chitosan emulsion

Soybean oil body (SOB) emulsion was combined with carboxymethyl chitosan (CMCS) to improve the stability of the oil body system, and the influence on the characteristics of SOB emulsion was explored. It was found that the particle size of SOB emulsion without CMCS was the smallest, 422.7 nm. After the addition of CMCS, the particle size of all samples increased, and the particle size of SOB-CMCS emulsion was the smallest (480.0 nm) when the amount of CMCS was 0.4 %. At this time, the surface hydrophobicity (H 0 ) of the sample is 230.5, and the emulsification stability is 69.83 min. The results of interfacial stability show that adding appropriate concentration of CMCS can reduce the interfacial tension of the sample. The results of rheological model fitting showed that the consistency coefficient of SOB-CMCS samples with 0.8 % CMCS addition was 3.75, which was the highest among all groups. The environmental stability test of SOB-CMCS emulsion showed that the particle size of SOB-CMCS emulsion with 0.4 % CMCS content was 944.0 nm after heating at 90 °C for 30 min, and the particle size of SOB-CMCS emulsion was 979.8 nm at 300 mmol/L salt ion concentration, which showed the smallest change compared with other groups.