摘要
以另外3种粉末为参照物,研究了可压性淀粉的压缩性和成型性。对这些性质通过分析其上冲力与最大模壁力、残余模壁力、弹性复原率的关系,应力缓和及Heckel图,并加以探讨。结果证明:可压性淀粉的良好的可压性是由于对原淀粉颗粒进行处理后,其表面性质发生变化并产生大量的非结晶区域;当其受压时表现为塑性流动而导致塑性变形,使颗粒间紧密接触并互相楔住,同时又可在颗粒间形成氢键结合,使成为坚固的压实体。
The compression and consolidation of compressible starch were studiedby comparing it with other 3 kinds of powder. Its tableting characteristicswere disclosed by observing the relationship between tableting pressure andmax radial force, residual die wall force and the ratio of elastic recovery,and the diagrams of stress relaxation as well as Heckel plots. The goodcompressibility of compressible starch was attributed to its plastic fluidity andthen plastic deformation in tableting process which made the treated granuleswedge each other and form some hydrogen bonds because properties of itssurface were variated and large non-crystal areas were produced on thesurfaces.
关键词
可压性淀粉
应力缓和
塑性流动性
Compressible starch
Stress relaxation
Plastic fluidity
