淀粉反应挤出改性及挤出过程中淀粉颗粒变化

原淀粉经各种改性后性质发生变化,使其应用范围更加广阔。淀粉改性方法有化学法、物理法和生物法,其中化学法改性工艺比较成熟,但改性过程需使用大量化学试剂,应用受到限制,而物理法改性不存在这个问题。反应挤出法是物理改性一种,作为一种新技术,在淀粉改性中有很多优点。该文主要介绍反应挤出政性原理、特点、应用现状、影响因素及挤出过程中淀粉颗粒变化。

Starch Modification Using Reactive Extrusion and Changes of Its Granules in Processing

The modification of native starch can chang its properties,extend its applications.The methods of starch modification are chemical modify,physical modify and biological modify,the technics of chemical modify is relatively sophisticated,but it need using a lot of chemical reagent, however,the physical modify don't have this problem.The reactive extrusion is one of the physical modify,it has many merits as a new technology of starch modification.The principles,characteristics, applications,of reactive extrusion and the changes of the starch grangule in processing were summarized in this paper.