Synthesis and FTIR spectroscopic studies on shear induced oriented liquid crystalline chitin/poly(acrylic acid) composite
Synthesis and FTIR spectroscopic studies on shear induced oriented liquid crystalline chitin/poly(acrylic acid) composite
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剪切诱导取向液晶甲壳素/聚丙烯酸复合材料的合成及红外光谱研究
DOI：
10.1002/app.12870
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发表时间：
2003
影响因子：
3
通讯作者：
Tsunehisa Kimura
中科院分区：
文献类型：
--
作者：
T. Nge;Naruhito Hori;Akio Takemura;H. Ono;Tsunehisa Kimura
通过丙烯酸在定向液晶相中的自由基光聚合，制备了具有独特光学性能的甲壳素/聚丙烯酸液晶复合材料。通过单向剪切实现中间相的排列。开发的复合材料，涂覆在氟化钙（CaF 2）基板上，是透明的，并保留取决于三元分散体（甲壳素微纤维，水，丙烯酸）的中间相组合物的对齐。根据偏振FTIR光谱的研究，取向度和分子间的相互作用都受到各自的中间相行为的强烈影响。甲壳素微纤丝的平均分子链沿剪切方向沿着取向。在w/w比为55：45的甲壳素/聚丙烯酸复合材料中观察到约25的高二色性比值，为制备新的基于甲壳素的光学各向异性复合材料开辟了一条有趣的途径。
Liquid crystalline chitin/poly(acrylic acid) composite, with its unique optical properties, was fabricated by the free-radical photopolymerization of acrylic acid in an aligned mesophase. Alignment of the mesophase was achieved by unidirectional shearing. The developed composites, coated on calcium fluoride (CaF 2 ) substrate, were transparent, and the alignment was retained depending on the mesophase composition of the ternary dispersion (chitin microfibrils, water, acrylic acid). According to studies from polarized FTIR spectroscopy, both the degree of orientation and the molecular interactions were strongly affected by respective mesophase behavior. The average molecular chains of chitin microfibrils were oriented along the shear direction. A high dichroic ratio value of about 25, observed in composites of chitin/poly(acrylic acid) with a w/w ratio of 55:45, opens an interesting avenue to prepare a new chitin-based optically anisotropic composite.
影响因子：
3.9
作者：
Araki, J;Wada, M;Kuga, S
通讯作者：
Kuga, S