Influence of Flexibility and Dimensions of Nanocelluloses on the Flow Properties of Their Aqueous Dispersions
Influence of Flexibility and Dimensions of Nanocelluloses on the Flow Properties of Their Aqueous Dispersions
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DOI：
10.1021/acs.biomac.5b00539
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发表时间：
2015-07-01
影响因子：
6.2
通讯作者：
Isogai, Akira
中科院分区：
文献类型：
--
作者：
Tanaka, Reina;Saito, Tsuguyuki;Isogai, Akira
我们报告，纳米纤维素分散体的特性粘度[η]可以单独表示为纳米纤维素的纵横比p的函数。短棒状纳米晶和长面条状纳米原纤化纤维素都制备为在水中的分散体。纳米纤维素的柔性和尺寸对其分散体的流动性质的影响通过实验和理论方法使用具有不同宽度（2.6-14.4 nm）和纵横比（23-376）的七种纳米纤维素样品来研究。随着纳米纤维素的长径比增加，它变得更柔韧，并且其分散体具有更高的粘度。不考虑这些纳米纤维素的柔性和尺寸，[eta]和p之间的关系为rho[eta] = 0.15 × p（1.9），其中p是纳米纤维素的密度。
We report that the intrinsic viscosity [eta] of nanocellulose dispersions can be solely expressed as a function of the aspect ratio p of the nanocellulose. Both short rod-like nanocrystalline and long spaghetti-like nanofibrillated celluloses were prepared as dispersions in water. The influence of the flexibility and dimensions of the nanocelluloses on the flow properties of their dispersions was investigated by experimental and theoretical approaches using seven nanocellulose samples with different widths (2.6-14.4 nm) and aspect ratios (23-376). As the aspect ratio of a nanocellulose increases, it becomes more flexible, and its dispersion has higher viscosity. Irrespective of the flexibility and dimensions of these nanocelluloses, the relationship between [eta] and p was rho[eta] = 0.15 x p(1.9), where p is the density of the nanocellulose.