Starch modification using a twin‐roll mixer as a reactor
Starch modification using a twin‐roll mixer as a reactor
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DOI：
10.1002/star.201200044
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发表时间：
2012-10
期刊：
影响因子：
2.3
通讯作者：
D. Qiao;W. Zou;Xingxun Liu;Long Yu;Ling Chen;Hongsheng Liu;Nuozi Zhang
中科院分区：
文献类型：
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作者：
D. Qiao;W. Zou;Xingxun Liu;Long Yu;Ling Chen;Hongsheng Liu;Nuozi Zhang
淀粉改性反应器已建立使用HAAKE流变仪结合双辊混合器，已被修改，以改善其密封和进料，并建立无氧环境。该系统的优点包括：（i）淀粉改性可以在高淀粉浓度（高达70%）下进行;（ii）将淀粉糊化和化学改性的步骤结合起来;（iii）可控的反应时间;以及（iv）较小的样品尺寸（60 g）要求。系统地研究了水含量、转速、时间和温度对反应体系的影响。以玉米淀粉（淀粉浓度为60%）为原料，采用丙烯酰胺接枝N，N′-亚甲基双丙烯酰胺进行交联反应，制备了可生物降解的高吸水性树脂。
A starch modification reactor has been established using a HAAKE rheometer incorporating a twin-roll mixer, which has been modified to improve its sealing and feeding, and to establish an oxygen-free environmental. The advantages of the system include: (i) starch modification can be carried out at high starch concentration (up to 70%); (ii) combining the steps of starch gelatinization and chemical modification; (iii) controllable reaction time; and (iv) smaller sample size (60 g) requirement. The effects of water content, rpm, time, and temperature on the reactive system was systematically investigated. Corn starch (60% starch concentration) was successfully grafted with acrylamide then crosslinked by N,N′-methylene-bisacrylamide to produce biodegradable superabsorbent polymers using this reactor.