Structural characteristics and properties of Bombyx mori silk fiber obtained by different artificial forcibly silking speeds
Structural characteristics and properties of Bombyx mori silk fiber obtained by different artificial forcibly silking speeds
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DOI：
10.1016/j.ijbiomac.2007.12.001
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发表时间：
2008-04-01
影响因子：
8.2
通讯作者：
Iwasa, Masayuki
中科院分区：
文献类型：
--
作者：
Khan, Md. Maj Ibur Rahman;Morikawa, Hideaki;Iwasa, Masayuki
为研究天然生物高分子蚕丝的纺丝工艺条件，以家蚕N140 × C140为原料，采用简单的人工强制吐丝方法，分别以60、120、180和240 cm·min（-1）的速度直接获得蚕丝纤维，并对其微观结构和物理性能进行了评价。在240厘米/分（-1）的高速纺丝条件下，可得到约8微米的丝纤维。丝纤维的拉伸性能随强力纺丝速度的提高而显著提高。在更高的速度下获得的丝纤维的β-片层结构含量显著增加。通过不同的纺丝速度得到的纤维表现出相当相似的X射线结晶度，而分子取向度随着纤维直径的减小而增加。在较高速度（240 cm min（-1））下获得的细丝纤维表现出稍高的热稳定性，如差示扫描量热法（DSC）分解温度的上移所示。(C)2007 Elsevier B. V.保留所有权利。
To study the spinning condition of natural biopolymer silk, the silk fibers were directly acquired from Bombyx mori silkworm, N140 x C140 by a simple artificial forcibly silking method at the speed of 60, 120, 180 and 240cm min(-1), respectively and its microstructure and physical properties were evaluated. The fine silk fibers (about 8 mu m) were obtained at faster spinning speed, 240 cm min(-1). The tensile properties of silk fibers were remarkably increased with raising the forcibly spinning speeds. The beta-sheet structure contents of silk fibers obtained at higher speed were considerably increased. The fibers obtained by different spinning speeds exhibited a fairly similar X-ray crystallinity, while the degree of molecular orientation increased with decreasing the fiber diameter. The fine silk fibers obtained at higher speed (240 cm min(-1)) exhibited a slightly higher thermal stability, as shown by the upward shift of differential scanning calorimetry (DSC) decomposition temperature. (C) 2007 Elsevier B.V. All rights reserved.