Injectable Highly Loaded Cellulose Nanocrystal Fibers and Composites.
Injectable Highly Loaded Cellulose Nanocrystal Fibers and Composites.
复制标题
可注射的高负载纤维素纳米晶体纤维和复合材料。
DOI：
10.1021/acsmacrolett.7b00609
复制
发表时间：
2017
影响因子：
7.015
通讯作者：
Wanasekara ND
中科院分区：
文献类型：
--
作者：
Wanasekara ND
通过将纳米纤维素（CNC）注入到疏水溶剂中，原位合成了CNC/PEO复合纤维。使用类似的原理，通过将CNC溶液注射到疏水性树脂中来开发可注射复合材料的单步制造方法。使用拉曼光谱获得纤维和复合材料的分子取向和变形。CNC被发现是高度对齐沿着纤维的轴，证实了极坐标图和二阶和四阶取向参数的2倍对称性。在拉伸变形下，跟踪特征性拉曼谱带的位置的移动，所述特征性拉曼谱带最初位于λ 1095 cm-1处，对应于纤维素主链聚合物链的振动。使用这种偏移，可以估计纤维模量为1.33GPa，这是非常高的。疏水树脂和注入的CNC纤维之间的应力传递进行了量化，在这种新型的复合材料中使用修改后的剪切滞后理论表明，出现明显的增强。我们的方法提出了一种新的方法，将高负载的CNC纤维原位引入到复合材料结构中。
Cellulose nanocrystals (CNC)/poly(ethylene oxide) (PEO) composite fibers were successfully produced in situ by injection into a hydrophobic solvent. Using a similar principle, a single step manufacturing method of injectable composites was developed by injection of a CNC solution into a hydrophobic resin. Molecular orientation and deformation of the fibers and composites were obtained using Raman spectroscopy. CNCs were found to be highly aligned along the fiber’s axes, as confirmed by 2-fold symmetry of polar plots and second and fourth order orientation parameters. A shift in the position of a characteristic Raman band, initially located at ∼1095 cm–1, corresponding to vibrations of the cellulose backbone polymer chains was followed under tensile deformation. Using this shift, it was possible to estimate the fiber modulus as being ∼33 GPa, which is remarkably high. Stress transfer between the hydrophobic resin and the injected CNC fibers was quantified in this new type of composite using a modified shear-lag theory showing that appreciable reinforcement occurs. Our approach presents a new way to introduce highly loaded CNC fibers in situ into a composite structure.
登录
查看更多内容
影响因子：
9.5
作者：
F. Quero;M. Nogi;H. Yano;K. Abdulsalami;S. Holmes;B. Sakakini;S. Eichhorn
通讯作者：
F. Quero;M. Nogi;H. Yano;K. Abdulsalami;S. Holmes;B. Sakakini;S. Eichhorn
DOI：
10.1117/12.969595
发表时间：
1988-12
期刊：
arXiv: General Physics
影响因子：
--
作者：
L. J. Fina;D. I. Bower;I. Ward
通讯作者：
L. J. Fina;D. I. Bower;I. Ward
透明导电纤维素纳米晶/石墨烯纳米片薄膜的制备
影响因子：
4.5
作者：
L. Valentini;S. B. Bon;E. Fortunati;J. Kenny;J. Kenny
通讯作者：
J. Kenny
激光拉曼光谱研究聚甲基丙烯酸甲酯分子取向
影响因子：
4.6
作者：
J. Purvis;D. I. Bower
通讯作者：
D. I. Bower
影响因子：
4.5
作者：
Eichhorn, SJ;Sirichaisit, J;Young, RJ
通讯作者：
Young, RJ