Semiquantitative Structural Analysis of Highly Anisotropic Cellulose Nanocolloids
Semiquantitative Structural Analysis of Highly Anisotropic Cellulose Nanocolloids
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DOI：
10.1021/mz300109v
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发表时间：
2012-06-01
影响因子：
7.015
通讯作者：
Yano, Hiroyuki
中科院分区：
文献类型：
--
作者：
Uetani, Kojiro;Yano, Hiroyuki
我们报告了一种利用“咖啡环”对高各向异性纳米胶体进行半定量结构分析的方法，这种“咖啡环”很容易通过纤维素纳米胶体悬浮液的液滴蒸发而形成。由于排除了体积效应，咖啡环的宽度反映了有效长宽比和水中胶体的构象。该理论成功地估计了从日本雪松纸浆中获得的纤维素纳米原纤维的相对长度为11.33 μ m。咖啡环可以半定量地揭示胶体的综合结构，也可以比较不同体系中胶体的长度或大小。
We report a method for the semiquantitative structural analysis of highly anisotropic nanocolloids by means of their "coffee rings", which were readily formed via the evaporation of droplets of the cellulose nanocolloidal suspensions. The widths of the coffee rings reflected the effective aspect ratios and the conformation of the colloids in water, owing to the excluded volume effect. The theory developed here succeeded in estimating the relative length of the cellulose nanofibrils, which were obtained from Japanese cedar pulp using a grinder, as 11.33 mu m. The coffee rings allow the comprehensive structures of colloids to be semiquantitatively revealed and also allow the lenght or size of colloids in different systems to be compared.