仓位规划管理办法.doc

仓位规划管理办法.doc再生丝素蛋白纤维的制备及机理研究
专 业: 纺织材料与纺织品设计硕士生: 邵伟力
指导老师: 崔世忠教授
中文摘要
近年来,随着人们环保意识的增强,加之蚕丝资源的有限,对再生丝素蛋白纤维的开发越来越受到人们的重视。本文是以废弃的柞蚕丝素纤维为原料制备纺丝原液,通过湿法纺丝工艺纺制出力学性能较好的再生蛋白纤维,具体研究了不同纺丝工艺参数对再生蛋白纤维结构和性能的影响,结果表明,再生蛋白纤维的最佳的纺丝工艺为:凝固浴中硫酸铵浓度为 40%、温度为 20℃,拉伸浴中溴化锂浓度为 %、乙醇浓度 3%、温度为 20℃,热水浴拉伸温度为 70℃,热处理时间 12min、温度 135℃,在此条件下能够成功地纺制得到拉伸倍数为 倍的再生蛋白纤维,其断裂强度为 ,断裂伸长为 %。本文对不同热处理条件下获得的纤维进行的扫描电镜测试、偏光显微镜测试、红外光谱测试分析、 X-衍射测试分析得出:热处理过程中,再生蛋白纤维的构象没有转变,还是以α- 螺旋和无规卷曲结构为主,少量β-折叠结构并存的。未干燥的纤维结晶度和取向度都比较低,经过热处理后,结晶度、晶粒尺寸和取向度均有有大幅度的提高, 蛋白纤维结构致密,力学性能大大改善。最后本文还对成形过程中结构的演变进行了研究,纤维在经过凝固浴成型、拉伸浴拉伸、热水浴拉伸、热处理时,随着拉伸倍数的逐步提高,纤维表面沟槽、裂缝逐渐减少直至光滑,内部孔洞、空隙逐渐减小甚至消失,纤维的结晶度逐步提高,取向度也明显提高,但在整个成型过程中纤维构象并没有发生转变。
关键词:再生丝素蛋白纤维;湿法纺丝;工艺参数;结构演变
Study on the Mechanism and Preparation of Regenerated
silk fibroin fibers
Major: Textile Material and Textiles Design Master: Shao Weili
Teacher: Professor Cui Shizhong
Abstract
In recent years, as people's awareness of environmental protection bined with silk resources limited, more and more attention has been paid on the development of the regenerated silk fibroin fiber. The spinning solution was based on abandoned fibroin fibers and it could get the regenerated protein fibers of good mechanical properties by wet spinning. And the different spinning process parameters to regenerated silk protein fiber structure and performance were researched concretely, It was indicated that the regenerated silk fibroin fibers spinning process as follows:
the concentration of ammonium sulfate was 40%, the temperature was 20℃ in the
coagulation bath; the concentration of Lithium bromide, ethanol is 3% and % respectively, temperature 20℃ in the drawing bath; the hot bath stretching temperature of 70℃; dry densification time 12min, temperature of 135℃;and it would
be essfully got the regenerated silk fibroin fibers of stretching ratio of times and the fracture strength and elongation at break of % under this condition. The fibers prepared different conditions of dryi