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Assessment of chemical and mechanical behavior of bamboo pulp and nanofibrillated cellulose exposed to alkaline environments

Cellulose (London), 2019-11, Vol.26 (17), p.9269-9285 [Peer Reviewed Journal]

Springer Nature B.V. 2019 ;Cellulose is a copyright of Springer, (2019). All Rights Reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-019-02703-7

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Title:
Assessment of chemical and mechanical behavior of bamboo pulp and nanofibrillated cellulose exposed to alkaline environments
Author: da Costa Correia, Viviane ; Ardanuy, Mònica ; Claramunt, Josep ; Savastano, Holmer
Subjects: Alkalinity ; Aluminous cements ; Bamboo ; Bamboo pulp ; Bamboo-pulp industry ; Bambú ; Bioorganic Chemistry ; Bonding strength ; Calcium aluminate ; Cellulose ; Cel·lulosa ; Cement ; Cement paste ; Ceramics ; Chemical composition ; Chemistry ; Chemistry and Materials Science ; Composites ; Degradation ; Fibers ; Fourier transforms ; Glass ; High alkalinity ; Hydrogen bonds ; Hydrogen-based energy ; Infrared analysis ; Infrared spectroscopy ; Lignocellulose ; Mechanical properties ; Nanofibrillated cellulose ; Natural Materials ; Organic Chemistry ; Original Research ; Photoelectrons ; Physical Chemistry ; Polpa de fusta ; Polymer Sciences ; Portland cements ; Pulpwood ; Sheets ; Slaked lime ; Spectrum analysis ; Submerging ; Sustainable Development ; Tensile strength ; Tensile tests
Is Part Of: Cellulose (London), 2019-11, Vol.26 (17), p.9269-9285
Description: This study was performed to study the effects of the cement paste composition (calcium aluminate cement—CAC and a geopolymer in comparison to Portland cement—OPC) on bamboo pulp and nanofibrillated cellulose (NFC). The changes in the composition and chemical structure of the fibers were analyzed by X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR). The changes in the mechanical strength were evaluated through tensile tests on the fibers after immersion on the cement pastes, in the form of sheets. The XPS results showed that the immersion of the pulp and NFC in the different pastes (CAC, geopolymer and OPC) modified the chemical surface of these fibers: it was found removal of lignin and extractives and some degradation of hemicellulose and cellulose. The FTIR analysis indicated modifications in the hydrogen bonds energy. The tensile strength of pulp sheets decreased in 70% and 34% after immersion in OPC and geopolymer, respectively. The tensile strength of the NFC sheets decreased 36%, 68% and 54% after immersion in OPC, CAC and geopolymer, respectively. Thus, the response of the bamboo pulp and NFC immersed in different cement pastes was different due the inherent characteristics of such fibers, and not only the Portland cement should be considered as harmful to lignocellulosic fibers. Although CAC and geopolymer are free of calcium hydroxide, the high alkalinity of these pastes also accelerated the degradation process of lignocellulosic fibers. Graphic abstract
Publisher: Dordrecht: Springer Netherlands
Language: English
Identifier: ISSN: 0969-0239
EISSN: 1572-882X
DOI: 10.1007/s10570-019-02703-7
Source: Recercat
ProQuest Central

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Assessment of chemical and mechanical behavior of bamboo pulp and nanofibrillated cellulose exposed to alkaline environments

Springer Nature B.V. 2019 ;Cellulose is a copyright of Springer, (2019). All Rights Reserved. ;info:eu-repo/semantics/openAccess ;ISSN: 0969-0239 ;EISSN: 1572-882X ;DOI: 10.1007/s10570-019-02703-7

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