Hinterstoisser Barbara, Akerholm Margaretha, Salmén Lennart
BOKU - University of Natural Resources and Applied Life Science, Muthgasse 18, A-1190 Vienna, Austria.
Biomacromolecules. 2003 Sep-Oct;4(5):1232-7. doi: 10.1021/bm030017k.
The properties of cellulose materials are dependent on interactions between and within the cellulose chains. To investigate the deformation behavior of cellulose and its relation to molecular straining, sheets with fibers oriented preferably in one direction were studied by dynamic FT-IR spectroscopy. Celluloses with different origins (spruce pulp, Cladophora cellulose, cotton linters) were used. The sheets were stretched sinusoidally at low strains and small amplitudes while being irradiated with polarized infrared radiation. The cellulose fibers showed mainly an elastic response. The cellulose fibers showed mainly an elastic response. The glucose rings and the C-O-C bridges connecting adjacent rings, as well as the O(3)H.O(5) intramolecular hydrogen bonds are the components mainly deformed under stress, whereas the O(2)H.O(6) intramolecular hydrogen bonds play a minor role. The load distribution was also found to be different in the different allomorphic forms of cellulose I, namely, I(alpha) and I(beta).
纤维素材料的性能取决于纤维素链之间以及链内部的相互作用。为了研究纤维素的变形行为及其与分子应变的关系，通过动态傅里叶变换红外光谱法对纤维优选沿一个方向排列的薄片进行了研究。使用了不同来源的纤维素（云杉纸浆、刚毛藻纤维素、棉短绒）。在低应变和小振幅下对薄片进行正弦拉伸，同时用偏振红外辐射照射。纤维素纤维主要表现出弹性响应。葡萄糖环以及连接相邻环的C-O-C桥，还有O(3)H.O(5)分子内氢键是主要在应力作用下发生变形的成分，而O(2)H.O(6)分子内氢键起的作用较小。还发现纤维素I的不同同质多晶型，即I(α)和I(β)，其载荷分布也不同。
