制备出了与蚕腺体内纺丝液浓度和后部丝腺pH值相近的再生丝素蛋白水溶液,利用静电纺丝技术模仿蚕在空气中吐丝的过程得到了再生丝素蛋白纤维.所得纤维的直径在350～4200nm之间,平均直径1700nm.通过正交实验方法考察了各种因素对纤维形态、直径及直径分布的影响,结果表明:所施电压对纤维的形态影响最大;溶液浓度对纤维的直径影响最大;喷头与接受板间距离对纤维直径的分布影响最大.实验得出了一个较好的静电纺丝条件为浓度30%,电压40kV,喷头与接受板间距离20cm.采用拉曼光谱、X衍射、DSC对再生丝素蛋白纤维进行了表征,发现再生丝素蛋白纤维中含有少量的Silk I结晶结构,主要以无定形结构为主,这与天然蚕丝的半结晶结构相比尚有差异.
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