EFFECT OF PARTICLE ALIGNMENT ON MECHANICAL PROPERTIES OF NEAT CELLULOSE NANOCRYSTAL FILMS
EFFECT OF PARTICLE ALIGNMENT ON MECHANICAL PROPERTIES OF NEAT CELLULOSE NANOCRYSTAL FILMS
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颗粒排列对纯纤维素纳米晶薄膜机械性能的影响
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
J. Youngblood
中科院分区：
文献类型：
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作者：
Alexander B. Reising;R. Moon;J. Youngblood
采用剪切式薄膜浇铸方法，从木质纤维纳米晶(CNC)悬浮液中浇铸出整齐的薄膜。用赫尔曼有序参数(S)表征了干膜的取向程度，并测量了薄膜的弹性模量(E)、极限拉伸强度(SF)、断裂伸长率(EF)和断裂功(WF)。在较高的浇铸剪切速率(0、10∙S-1和100∙S-1)和较高的悬浮液pH(~3比~7)下，干膜中的cnc取向程度增加。在剪切速率为100∙S~(-1)的中性条件下，获得了最大取向(S=0.53)
Shear-based film casting methods were used to cast neat films from wood-based cellulose nanocrystal (CNC) suspensions. The degree of CNC alignment in dried films was characterized using the Hermans order parameter (S), and the film elastic modulus (E), ultimate tensile strength (sf ), elongation at failure (ef), and work of fracture (WF) were measured with respect to casting direction and CNC alignment. The degree of CNC alignment in dried films was found to increase with higher casting shear rates (0, 10∙s -1 , and 100∙s -1 ) and at higher suspension pH (~3 versus ~7). The maximum orientation (S=0.53) was achieved for CNC suspensions having a neutral pH and sheared at a rate of 100∙s -1