Influence of chemical pretreatments on plant fiber cell wall and their implications on the appearance of fiber dislocations
-
Alisson Farley Soares Durães
,
Jordão Cabral Moulin
,
Matheus Cordazzo Dias
,
Maressa Carvalho Mendonça
Abstract
The cell wall of plant fibers may contain irregular regions called dislocations. This study evaluated the effect of chemical pretreatment as a mechanochemical dislocation initiator in unbleached and bleached Eucalyptus sp. fibers. Accordingly, bleached and unbleached pulps of eucalyptus were subjected to chemical pretreatments with sodium hydroxide at concentrations of 5% for 2 h, 10% for 1 h and 10% for 2 h or with hydrogen peroxide. The extent of dislocations was evaluated by polarized light microscopy. Based on the observation, an index of dislocations (ID) expressing their ratio of cell wall as per two-dimensional (2D) imaging and their angle relative to the longitudinal direction of the fiber were estimated. Chemical pretreatments increased the ID for bleached and unbleached fibers as well as increased the changes in the curl of bleached and unbleached fibers for chemical pretreatments. Chemical pretreatment extracted the hemicellulose of the fiber cell wall causing some fiber to curl, which in turn generated new dislocations and modifications in the dislocation angles which may be useful for improving the deconstruction process of the cellulose fibers.
Acknowledgments
The authors are thankful to the Federal University of Lavras, MG, Brazil, for providing access to the Department of Wood Science and Technology and to the Klabin SA company for supplying cellulose.
Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: The authors are grateful for the financial support (133628/2017-5) provided by the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), the Fundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG) and the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Capes, (FinanceCode001).
Employment or leadership: None declared.
Honorarium: None declared.
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Articles in the same Issue
- Frontmatter
- Original articles
- Axial variation in the cambium anatomy of Schizolobium parahyba var. amazonicum
- Effect of growth stress and interlocked grain on splitting of seven different hybrid clones of Eucalyptus grandis×Eucalyptus urophylla wood
- Dynamic parallel-to-grain compressive properties of three softwoods under seismic strain rates: tests and constitutive modeling
- European beech log and lumber grading in wet and dry conditions using longitudinal vibration
- Influence of chemical pretreatments on plant fiber cell wall and their implications on the appearance of fiber dislocations
- Enhancing the thermal stability, water repellency, and flame retardancy of wood treated with succinic anhydride and melamine-urea-formaldehyde resins
- Improvement of interfacial interaction in impregnated wood via grafting methyl methacrylate onto wood cell walls
- A study on the GA-BP neural network model for surface roughness of basswood-veneered medium-density fiberboard
- Characterisation and valorisation of the bark of Myrcia eximia DC. trees from the Amazon rainforest as a source of phenolic compounds
Articles in the same Issue
- Frontmatter
- Original articles
- Axial variation in the cambium anatomy of Schizolobium parahyba var. amazonicum
- Effect of growth stress and interlocked grain on splitting of seven different hybrid clones of Eucalyptus grandis×Eucalyptus urophylla wood
- Dynamic parallel-to-grain compressive properties of three softwoods under seismic strain rates: tests and constitutive modeling
- European beech log and lumber grading in wet and dry conditions using longitudinal vibration
- Influence of chemical pretreatments on plant fiber cell wall and their implications on the appearance of fiber dislocations
- Enhancing the thermal stability, water repellency, and flame retardancy of wood treated with succinic anhydride and melamine-urea-formaldehyde resins
- Improvement of interfacial interaction in impregnated wood via grafting methyl methacrylate onto wood cell walls
- A study on the GA-BP neural network model for surface roughness of basswood-veneered medium-density fiberboard
- Characterisation and valorisation of the bark of Myrcia eximia DC. trees from the Amazon rainforest as a source of phenolic compounds
