Effect of thermal treatment on fiber morphology in wood pyrolysis

Neto, Raul de Abreu; Lima, José Tarcísio; Takarada, Luiz Mendes; Trugilho, Paulo Fernando

doi:10.1007/s00226-020-01238-6

Cited by 14 publications

(5 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Cellulose is the primary component of wood and serves a structural function; its degradation resulted in fiber contraction and reduced its dimensions. The changes in wood anatomy by thermal modification were similar to those found for the carbonization of Eucalyptus urophylla and Corymbia citriodora wood, with an increase in vessel diameter (Abreu Neto et al, 2021).…”

Section: Wood Anatomical Characterizationsupporting

confidence: 74%

FTIR spectroscopy and technological characterization of heat treated Fraxinus excelsior wood

Carneiro,

Carvalho,

Freitas

et al. 2023

CERNE

View full text Add to dashboard Cite

Background:The wood heat treatment results in the partial degradation of its chemical constituents, mainly cellulose and hemicellulose, reducing the hygroscopicity of the material. This process improves the dimensional stability and resistance to biodeterioration and worsens the mechanical resistance. This work aimed to evaluate the effect of heat treatment on the physical, anatomical, chemical, and mechanical properties of Fraxinus excelsior wood. In untreated and heat-treated wood, the pH, buffering capacity, basic density, equilibrium moisture content, shrinkage, wood anatomy, thermogravimetric behavior, and chemistry by conventional and FTIR methods were determined.Results: Heat treated wood had lower pH (5.50), equilibrium moisture content (6.26%), shrinkage (7,29%), holocellulose contents (55,96%) and higher buffering capacity (0,479 mmol/L), extractives (8,25%), and lignin contents (35,78%). Heat treatment reduced the pH and increased the buffering capacity of the wood, reduced the holocellulose content, and increased the lignin content, leaving the wood less hygroscopic and reducing its volumetric and linear variation. The process did not change the basic density and fiber length, but it reduced their width, lumen diameter, and wall thickness. The FTIR analysis confirmed the degradation of holocellulose and division of aliphatic side chains in lignin. The maximum dredging range of untreated and heat-treated wood occurred at 350 ºC, and the heat-treated wood had a higher residual mass when subjected to 500 ºC. Conclusion:Heat-treated wood can be indicated for products used in external environments, such as floors, fences, coatings, door and window structures.

show abstract

Section: Wood Anatomical Characterizationsupporting

confidence: 74%

FTIR spectroscopy and technological characterization of heat treated Fraxinus excelsior wood

Carneiro,

Carvalho,

Freitas

et al. 2023

CERNE

View full text Add to dashboard Cite

show abstract

“…On the other hand, 68.84% of the RL was obtained after 12 months in the oven. Based on SEM images from the study by de Abreu Neto et al [ 92 ], it is probable that increasing the temperature causes deformations and changes in the morphology of the wood fibres as a whole. Indeed, wood fibres exhibited a propensity for the thickness of their fibre walls to shrink with increasing temperatures.…”

Section: Resultsmentioning

confidence: 99%

Conservation Environments’ Effect on the Compressive Strength Behaviour of Wood–Concrete Composites

et al. 2022

View full text Add to dashboard Cite

This paper addresses the issues in making wood–concrete composites more resilient to environmental conditions and to improve their compressive strength. Tests were carried out on cubic specimens of 10 × 10 × 10 cm3 composed of ordinary concrete with a 2% redwood- and hardwood-chip dosage. Superficial treatments of cement and lime were applied to the wood chips. All specimens were kept for 28 days in the open air and for 12 months in: the open air, drinking water, seawater, and an oven. Consequently, the compressive strength of ordinary concrete is approximately 37.1 MPa. After 365 days of exposure to the open air, drinking water, seawater, and the oven, a resistance loss of 35.84, 36.06, 42.85, and 52.30% were observed, respectively. In all environments investigated, the untreated wood composite concrete’s resistance decreased significantly, while the cement/lime treatment of the wood enhanced them. However, only 15.5 MPa and 14.6 MPa were attained after the first 28 days in the cases of the redwood and the hardwood treated with lime. These findings indicate that the resistance of wood–concrete composites depends on the type of wood used. Treating wood chips with cement is a potential method for making these materials resistant in conservation situations determined by the cement’s chemical composition. The current study has implications for researchers and practitioners for further understanding the impact of these eco-friendly concretes in the construction industry.

show abstract

“…SEM images can reveal surface features such as cracks, fractures, delamination and surface roughness. These features can be caused by manufacturing processes, environmental influences or mechanical stress [39]. The surface characteristics can provide information about the durability, wear resistance and aging behavior of chipboard wood and nano-composite materials.…”

Section: B Study Of Ftir and X-ray Diffractionmentioning

confidence: 99%

“…Shiny cracks were not observed in the composites, but were observed in the particleboards (Figure 4-a). During the manufacturing process of composites, the wood particles are bound together with resins, creating voids between the particles that can contribute to the porous structure of the material [39]. Overall, the presence of porosity in the SEM images of these nano-composites is a common feature resulting from the natural structure of the material, processing conditions, composition and environmental factors [40].…”

Section: B Study Of Ftir and X-ray Diffractionmentioning

confidence: 99%

Investigation and effect of PVC and PVTMS on sintering, physical and mechanical features of chipboard wood

Roghaiyeh Mazloumihaghghi

2024

IJLTEMAS

View full text Add to dashboard Cite

Due to their unique combination of properties, wood-plastic composites (WPC) have proven to be a promising alternative to conventional wood and plastic materials in various applications. This article provides a new insight into WPCs consisting of chipboard wood as matrix and polyvinyl chloride (PVC) and poly vinyl trimtehoxy silane (PVTMS) as reinforcement. Overall, this paper highlights the significant advances and opportunities in the field of wood-polymer composites and their potential as sustainable, high-performance materials with a wide range of applications. Continuous research and development efforts are essential to further improve the properties and expand the use of WPC in various industries. In the manufacturing process, wood and thermoplastic polymers are blended together, often using additives and binders to improve compatibility and performance. The resulting composites have desirable properties, such as a high strength-to-weight ratio and the ability to be molded into complex shapes. The differential scanning calorimetry (DSC), flourier transform infrared (FTIR), X-Ray diffraction (XRD), X-ray photoelectron spectroscopy and scanning Electron Microscopy (SEM) characteristics and mechanical properties were discussed in detail. As a result, the composite material sintered at 80 ℃ showed better mechanical behavior, with the compressive strength calculated to be 28.73 MPa.

show abstract

Effect of thermal treatment on fiber morphology in wood pyrolysis

Cited by 14 publications

References 29 publications

FTIR spectroscopy and technological characterization of heat treated Fraxinus excelsior wood

FTIR spectroscopy and technological characterization of heat treated Fraxinus excelsior wood

Conservation Environments’ Effect on the Compressive Strength Behaviour of Wood–Concrete Composites

Investigation and effect of PVC and PVTMS on sintering, physical and mechanical features of chipboard wood

Contact Info

Product

Resources

About