Document Detail

Re-orientation of cellulose nanowhiskers in agarose hydrogels under tensile loading.
MedLine Citation:
PMID:  22295902     Owner:  NLM     Status:  Publisher    
Agarose hydrogels filled with cellulose nanowhiskers were strained in uniaxial stretching under different humidity conditions. The orientation of the cellulose whiskers was examined before and after testing with an X-ray laboratory source and monitored in situ during loading by synchrotron X-ray diffraction. The aim of this approach was to determine the process parameters for re-orienting the cellulose nanowhiskers towards a preferential direction. Results show that a controlled drying of the hydrogel is essential to establish interactions between the matrix and the cellulose nanowhiskers which allow for a stress transfer during stretching and thereby promotes their alignment. Rewetting of the sample after re-orientation of the cellulose nanowhiskers circumvents a critical increase of stresses. This improves the extensibility of the hydrogel and is accompanied by a further moderate alignment of the cellulose nanowhiskers. Following this protocol, cellulose nanowhiskers with an initial random distribution can be re-oriented towards a preferential direction, creating anisotropic nanocomposites.
Anayancy Osorio-Madrazo; Michaela Eder; Markus Rueggeberg; Jitendra Kumar Pandey; Matthew James Harrington; Yoshiharu Nishiyama; Jean-Luc Putaux; Cyrille Rochas; Ingo Burgert
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-1
Journal Detail:
Title:  Biomacromolecules     Volume:  -     ISSN:  1526-4602     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-2-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100892849     Medline TA:  Biomacromolecules     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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