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用偏光显微镜观察了蚕腺体内和再生丝素蛋白水溶液的流动状态和各向异性现象,用乌氏粘度计测试了其流出时间,并用HAKKE流变仪测试了其粘度。结果发现蚕腺体内和再生丝素蛋白水溶液的性质差别非常大,认为丝素蛋白水溶液在蚕腺体内存在一个逐步熟成的过程。随着丝素蛋白水溶液在腺体内的前移,丝素蛋白分子逐渐沿移动方向取向而呈有序态,最终成为粘度非常大的各向异性的凝胶体,而再生丝素蛋白水溶液是粘度非常低的各向同性溶液。这些差异表明,丝素蛋白水溶液在蚕腺体内的熟成过程是蚕能够吐出优良蚕丝的关键步骤,要想制备出高性能的纤维,在“仿生纺丝”之前,首先要“仿生制备纺丝液”。
The flow conditions and anisotropy of silkworm glands and regenerated silk fibroin solutions were observed under a polarizing microscope. The outflow time was measured with a Ubbelohde viscometer and the viscosity was measured with a HAKKE rheometer. The results showed that silkworm glands and regenerated silk fibroin aqueous solution of the nature of the difference is very large that silk fibroin solution in silkworm glands there is a gradual ripening process. As silk fibroin solution progresses in the gland, the silk fibroin molecules are gradually oriented in the moving direction in an ordered state, eventually becoming an anisotropic gel with a very high viscosity, whereas the regenerated silk fibroin solution is Very low viscosity isotropic solution. These differences indicate that silk fibroin solution in silkworm glands mature process is silkworm silk spit out a good key step, in order to prepare high-performance fibers, in the “bionic”, we must first “bionic preparation of spinning liquid”.