With the increased of pego percentage in blend films , the broken strength , the initial tensile modulus and the broken power decreased , but the elongation at break increased 随着pego的加入，共混膜的断裂强度和拉伸初始模量下降，断裂伸长率提高，断裂功减小。
2.
The results of x - ray diffraction showed that there somehow existed some mutual influence between the two components in sf / pego blend membranes , which restrained silk crystallize but induced the formation of silk ii in blend films . the result of thermal analysis indicated that the thermal stability of silk fibroin in the blend membranes was improved , which was attributed to the addition of pego . the amino acids analysis showed the pego and silk fibroin combined with the covalent bond , and the dissolubility of silk fibroin in membranes was decreased X射线衍射和红外光谱分析结果表明pego改性丝素膜中，成膜的两种组分间存在某种相互作用， pego抑制了丝素silk结晶，随分子量的增加，促进了丝素silk结晶；热分析结果表明pego的加入提高了丝素的热稳定性；氨基酸分析表明pego与丝素发生了共价交联，膜中丝素在热水中的溶失率大大降低。
3.
Six different molecular weigh polyethylene glycols were selected to prepare blend films with silk fibroin , five different molecular weight polymer - polyethylene glycol diglycidyl ether ( pego ) were synthesized and structures of them were characterized by 1h nmr , ir , gpc . a kind of silk fibroin membranes were prepared by blend the pego and silk fibroin 选用六种不同分子量的聚乙二醇与丝素共混制膜，并选用其中五种合成了五种不同分子量的聚乙二醇缩水甘油醚( pego ) ，以合成的pego为添加剂，研究了不同分子量、不同含量下制得的改性丝素膜的结构与性能。
