Structures and physical properties of polyvinyl alcohol/sericin blend hydrogel fibers.
Structures and physical properties of polyvinyl alcohol/sericin blend hydrogel fibers.
复制标题
聚乙烯醇/丝胶共混水凝胶纤维的结构和物理性能。
DOI：
10.11416/kontyushigen1930.68.1
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
M. Nagura
中科院分区：
文献类型：
--
作者：
Su Wang;Y. Goto;Y. Ohkoshi;M. Nagura
采用凝胶纺丝法制备了聚乙烯醇（PVA）/丝素蛋白共混纤维，并对该纤维经Sakurada法定型后的拉伸和加热后的结构和物理性能进行了研究。单纯用凝胶纺丝法难以制得PVA纤维。结晶度约为40%，晶体取向为90%的最高淹没纤维。PVA纤维的无定形链的取向程度低于普通维纶纤维。在60℃以下，未被淹没的纤维因溶胀而伸长约10%。延伸率随着拉伸的进行而降低，这是由于晶体取向的增加。未定型的PVA无定形链在高于60℃时开始溶解，高于90℃时溶解急剧。因此，在90℃以上的熔融过程中，由于PVA结晶区的熔融，使原丝产生较大的收缩。最高纤度纤维的断裂强力和断裂伸长率分别是维纶的一半和两倍。虽然无定形PVA链不能完全取向，但样品的杨氏模量几乎与维纶相同，这是因为丝胶的杨氏模量比PVA高，并且丝胶分子与无定形PVA链形成分子束。信州大学纺织工学部（日本上田3-15-1）
Blend-fiber of polyvinyl alcohol with silk sericin was prepared by a gel spinning method which was developed in our laboratory for both the application of sericin and the functional improvement of PVA fiber, and was investigated regarding the structures and physical properties of the fibers as formalized by the Sakurada Method after drawing and heating. It was difficult to make PVA fiber only by the gel spinning method. The crystallinity was approximately 40% and the crystal orientation was 90% for the highest drown fibers. The amorphous chains of PVA oriented less than ordinary Vinylon fiber. The undrown fiber elongated approximately 10% by swelling below 60℃. Elongation decreased with drawing because of the increase of the crystal orientation. The unformalized PVA amorphous chains began to dissolve slightly above 60℃ and drastically above 90℃. Consequently the melting of samples above 90℃ accompanied by the relative large contraction of the drown fibers, because of melting of PVA crystalline region. The values of breaking strength and elongation of the highest drown fiber were half that and twice that of Vinylon respectively. Although amorphous PVA chains could not be fully oriented, Young's moduli of samples were almost the same as Vinylon, because sericin had higher Young's modulus than PVA, and sericin molecules formed a molecular bundle with amorphous PVA chains. Faculty of Textile Science and Technology, Shinshu University (3-15-1, Tokida, Ueda 386-8567, Japan)