Starch sodium dodecenyl succinate prepared by one-step extrusion and its properties.
One-step extrusion was developed to prepare starch sodium dodecenyl succinate (SSDS). Effects of screwing speed, reaction temperature, moisture content, sodium hydroxide amount (as catalyst), and dodecenly succinic anhydride (DDSA) amount on the degree of substitution (DS) were investigated. Optimum conditions were determined and found to be as follows: screwing speed, 110rpm; temperature, 120°C; moisture content, 30%; sodium hydroxide amount, 0.5%; DDSA amount, 3%. Under these conditions, the DS of SSDS was 0.014%, and the reaction efficiency was 78%. The structure of SSDS prepared by one-step extrusion was partially characterised. Infrared absorption spectra showed peaks of ester bond and carbonyl group at 1707 and 1564cm(-1), respectively, indicating that dodecenyl succinic groups were introduced into starch molecule backbone by esterification agent. X-ray diffraction analysis showed that compared with native starch, the particle morphology of SSDS prepared by extrusion became irregular, and its crystallinity was partially destroyed.
State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Yaoqi
Y
Tian
State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Xiwen
X
Zhang
State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Binhua
B
Sun
State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China.
Zhengyu
Z
Jin
State Key Laboratory of Food Science and Technology, Jiangnan University, 1800 Lihu Road, Wuxi 214122, China; Jiangsu Marine Resources Development Research Institute, Lianyungang, Jiangsu 222005, China; School of Marine Science and Technology, Huaihai Institute of Technology, 59 Cangwu Road, Xinpu, 222005, China. Electronic address: wusj@hhit.edu.cn.
Shengjun
S
Wu
D004951:Esterification; D012972:Sodium Hydroxide / Q000737:chemistry; D013213:Starch / Q000737:chemistry*; D019802:Succinic Acid / Q000737:chemistry*; D013387:Succinic Anhydrides / Q000737:chemistry; D013696:Temperature; D003313:Zea mays / Q000737:chemistry
D013387:Succinic Anhydrides; D012972:Sodium Hydroxide; C031801:succinic anhydride; D013213:Starch; D019802:Succinic Acid
Esterification; Extrusion; Starch sodium dodecenyl succinate