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All-cellulose composites based on microfibrillated cellulose and filter paper via a NaOH-urea solvent system

Cellulose (London), 2016-02, Vol.23 (1), p.593-609 [Peer Reviewed Journal]

Springer Science+Business Media Dordrecht 2015 ;Cellulose is a copyright of Springer, (2015). All Rights Reserved. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-015-0835-4

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Title:
All-cellulose composites based on microfibrillated cellulose and filter paper via a NaOH-urea solvent system
Author: Duchemin, Benoît ; Le Corre, Déborah ; Leray, Nolwenn ; Dufresne, Alain ; Staiger, Mark P
Subjects: Bioorganic Chemistry ; Cellulose ; Cellulose fibers ; Ceramics ; Chemistry ; Chemistry and Materials Science ; Composite materials ; Composites ; Crystal structure ; Crystallinity ; Dissolution ; Filter paper ; Fourier transform infrared spectroscopy ; Fourier transforms ; Glass ; Mechanical properties ; Modulus of elasticity ; Natural Materials ; Organic Chemistry ; Original Paper ; Physical Chemistry ; Polymer Sciences ; Sodium hydroxide ; solvents ; Substrates ; Sustainable Development ; temperature ; tensile strength ; urea ; Ureas ; X-ray diffraction
Is Part Of: Cellulose (London), 2016-02, Vol.23 (1), p.593-609
Description: All-cellulose composites were produced by partial dissolution of two cellulosic sources in a mixture of sodium hydroxide and urea at low temperature. Filter paper (FP) and microfibrillated cellulose (MFC) were used to examine the role of the fiber dimensions of the initial reinforcing network on the final mechanical properties of thin self-reinforced all-cellulose composites. The dissolution time was used to control the extent of the transformation. The initial fiber structure was progressively transformed into a thoroughly consolidated composite material. X-ray diffraction and Fourier-transform infrared spectroscopy were able to show that the initial cellulose I allomorph was replaced with a cellulose II allomorph. FP underwent a fast crystallinity loss and transformation to cellulose II. In contrast, the crystallinity of MFC decreased slowly after dissolution. This result was also correlated with a slower allomorphic transformation. The crystallinity of MFC decreased to a level comparable to that of FP after 40 min and it remained comparatively unaffected at extended dissolution times. Comparison between powder and transmission XRD measurements demonstrated that the cellulose II present in all films after dissolution was strongly textured with its (1[Formula: see text]0) plane lying parallel to the sample surface despite fibrous microstructural features remaining from the initial substrates. The tensile strength and elastic modulus of FP increased significantly (+690 and +528 %, respectively) after only 20 min, while that of MFC remained relatively unaltered as a function of the dissolution time.
Publisher: Dordrecht: Springer Netherlands
Language: English
Identifier: ISSN: 0969-0239
EISSN: 1572-882X
DOI: 10.1007/s10570-015-0835-4
Source: ProQuest Central

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All-cellulose composites based on microfibrillated cellulose and filter paper via a NaOH-urea solvent system

Springer Science+Business Media Dordrecht 2015 ;Cellulose is a copyright of Springer, (2015). All Rights Reserved. ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-015-0835-4

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