Characterization of the Poly(vinyl alcohol)/Cellulose Whisker Gel Spun Fibers.
Characterization of the Poly(vinyl alcohol)/Cellulose Whisker Gel Spun Fibers.
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聚乙烯醇/纤维素晶须凝胶纺纤维的表征。
DOI：
10.1016/j.compositesa.2011.02.012
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
Y
中科院分区：
文献类型：
--
作者：
Uddin;A. J.; Araki;J.; Gotoh;Y
本文报道了在聚合物基体中用高度取向的纤维素晶须（CW）增强的纳米复合材料的制备和表征。使用聚乙烯醇（PVA）和从棉花制备的CW的稳定悬浮液制备的纳米复合材料。将宏观上均匀的PVA-CW悬浮液进行凝胶纺丝。所产生的纤维表现出高的CW在平行于纤维轴的方向上的取向。PVA-CW纤维的DSC研究表明，由于CW表面硫酸根基团导致PVA转化为多烯结构，因此PVA熔融后冷却期间没有结晶放热。复合纤维的储能模量（E′）随着CW含量的增加而显著提高，即使在少量CW（5 wt.%）的情况下也是如此固体PVA）。这是由于PVA和CW之间通过氢键和有效的应力传递的有利的相互作用从PVA到CW。
The current work reports the preparation and characterization of the nanocomposites reinforced with highly oriented cellulose whiskers (CWs) in a polymer matrix. The nanocomposites were prepared using polyvinyl alcohol (PVA) and a stable suspension of CWs prepared from cotton. The macroscopically homogeneous PVA–CW suspensions were gel spun. The produced fibers exhibited a high orientation of CWs in a direction parallel to the fiber axis. A DSC study of the PVA–CW fibers showed no crystallization exotherm during cooling after PVA melting due to the transformation of PVA to a polyene structure caused by the surface sulfate groups of the CWs. Storage modulus (E′) of the composite fibers showed outstanding enhancement with increasing CW content, even with a small amount of CWs (5wt.% of solid PVA). This is attributed to the favorable interaction between PVA and the CWs through hydrogen bonding and effective stress transfer from PVA to the CWs.