Abstract: The application properties，such as apparent viscosity，surface activity，degradation induced by enzyme or radiation，and emulsion stability of starch sodium octenyl succinate (SSOS) were studied in order to provide some guidance for its application. The results indicated that the apparent viscosity of SSOS increased with the rise of its degree of substitution (DS)，and the preparation methods of SSOS solution affected its apparent viscosity greatly，i.e. the solutions diluted from thicker ones had a higher apparent viscosity than those gelated directly to the specific concentration. The higher the DS of SSOS，the more notable the difference. The surface activity of SSOS was enhanced with the rise of its DS，i.e. a higher DS meant a lower surface tension of the solution. SSOS could be degraded by both enzymes and γ-rays，but the degradation regularities were different. The rate of degradation decreased with the rise of DS during enzymatic degradation while increased with the rise of DS during radiation degradation induced by γ-rays. Then the orthogonal experiment was designed for obtaining the optimal emulsification conditions. The results showed that SSOS had excellent emulsification property，and the optimized emulsification condition was DS 0.050，the ratio of oil-SSOS solution 0.10 mL/mL，SSOS concentration 0.05 g/mL，stirring speed 700 r/min，and the temperature，because of its slight influence on emulsification，could be selected as needed.

摘要： 研究了辛烯基琥珀酸淀粉酯（SSOS）的表观黏度、表面活性、辐射降解和酶降解特性，以及SSOS的乳化性能，结果表明：随着SSOS取代度的增大，糊液的表观黏度值增加，且糊液的配制方式对其黏度有较大影响，通过稀释方式制得的糊液表观黏度明显高于直接糊化法，而且取代度越高，这种差别越显著；随着SSOS取代度的增加，糊液的表面张力下降；SSOS的酶降解和辐射降解具有完全不同的规律，酶降解速率随取代度的增加而减慢，而辐射降解速率随取代度的增加而加快，且辐射剂量越大，高取代度SSOS所受的影响越大。通过正交实验发现SSOS在很宽的范围内具有良好的乳化稳定性，且这种稳定性受SSOS取代度、油水比、SSOS浓度的影响比较显著。