Changes to the Contour Length, Molecular Chain Length, and Solid-State Structures of Nanocellulose Resulting from Sonication in Water.
Changes to the Contour Length, Molecular Chain Length, and Solid-State Structures of Nanocellulose Resulting from Sonication in Water.
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水中超声处理引起的纳米纤维素轮廓长度、分子链长度和固态结构的变化。
DOI：
10.1021/acs.biomac.0c00281
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发表时间：
2020
影响因子：
6.2
通讯作者：
A. Isogai
中科院分区：
文献类型：
--
作者：
Yaxin Zhou;Yuko Ono;M. Takeuchi;A. Isogai
水中超声处理降低了由木材纤维素纤维和微晶纤维素制备的纳米纤维素的平均轮廓长度。木材纤维素纳米纤丝中的大多数扭结在超声处理的最初10分钟期间形成。在随后的超声处理10 ~ 120 min期间，在与解聚相关的扭结和刚性片段处发生片段化，导致形成具有低纵横比的纤维素纳米晶体。固态交叉极化魔角样品自旋13 C-核磁共振显示，纤维素的原始结晶区域部分转化为原纤维表面或无序区域的预处理和随后的碎片的分子变化在超声处理。由微晶纤维素制备的纳米纤维素在超声处理后具有不同的分子链长度的断裂行为。结果表明，平均而言，六边形36纤维素链结构形成每个木材纤维素微纤丝的横截面。
Sonication in water reduced the average contour lengths of nanocellulose prepared from wood cellulose fiber and microcrystalline cellulose. Most of the kinks in the wood cellulose nanofibrils were formed during the initial 10 min of sonication. Fragmentation occurred at the kinks and rigid segments associated with depolymerization during subsequent sonication for 10‒120 min, resulting in the formation of cellulose nanocrystals with low aspect ratios. Solid-state cross-polarization magic angle sample spinning 13C-nuclear magnetic resonance revealed that the original crystalline regions of the cellulose were partly transformed to fibril surfaces or disordered regions by both pretreatment and the subsequent fragmentation of molecular changes during sonication. The nanocellulose prepared from microcrystalline cellulose had different fragmentation behavior with regard to molecular chain length following sonication. The results indicated that on average the hexagonal 36 cellulose chain structure formed the cross-section of each wood cellulose microfibril.
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由纤维素生物聚合物组成的生物功能界面
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
Yokota S.;et. al.
通讯作者：
et. al.
影响因子：
15
作者：
Nishiyama, Y;Langan, P;Chanzy, H
通讯作者：
Chanzy, H
影响因子：
6.2
作者：
Saito, T;Isogai, A
通讯作者：
Isogai, A
影响因子：
6.2
作者：
Saito, Tsuguyuki;Kimura, Satoshi;Isogai, Akira
通讯作者：
Isogai, Akira