Orientation and interfacial stress transfer of cellulose nanocrystal nanocomposite fibers

POLYMER

卷:110

Article

Chang, Huibin^1,2  Luo, Jeffrey^1,2  Liu, H. Clive^1,2  Davijani, Amir A. Bakhtiary¹  Wang, Po-Hsiang¹  Kumar, Satish^1,2 

[1] Georgia Inst Technol, Sch Mat Sci & Engn, Atlanta, GA 30332 USA

[2] Georgia Inst Technol, Renewable Bioprod Inst, Atlanta, GA 30332 USA

关键词: Two-fold symmetry;    Four-fold symmetry;    Cellulose nanocrystals;   

DOI  :  10.1016/j.polymer.2017.01.015

来源: Elsevier

【 摘 要 】

Orientation and interfacial stress transfer in cellulose nanocrystals (CNC) reinforced polyacrylonitrile (PAN) nanocomposite fibers were determined by Raman spectroscopy. The 1095 cm(-1) Raman band was used to quantify the orientation of CNC in composite fiber. Under VV (vertical/vertical) mode, polar plots of all composite fibers showed a two-fold symmetry. Under VH (vertical/horizontal) mode, it showed a four-fold symmetry. The CNCs are highly oriented in the composite fiber, which is confirmed by second and fourth order orientation parameters: < P-2(cos theta)> and < P-4(cos theta)>. The 1095 cm(-1) Raman band shift under uniaxial deformation was used to characterize the interfacial shear stress transfer between PAN matrix and CNCs. (C) 2017 Elsevier Ltd. All rights reserved.

【 授权许可】

Free