Drying Temperature and Hornification of Industrial Never-Dried Pinus radiata Pulps. 1. Strength, Optical, and Water Holding Properties

Giacomozzi, Dante; Joutsimo, Olli

doi:10.15376/biores.10.3.5791-5808

Cited by 17 publications

(6 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Previous studies by Giacomozzi and Joutsimo (2015) and Giacomozzi and Joutsimo (2017) using NMR technique showed decreases in the pore volume and average pore sizes for dried pulp (pores under 220 nm in size), and increase in the inner crystallinity of the cellulose upon drying, which was also previously reported by other authors (Stone and Scallan 1965;Minor 1994;Duchesne 2001;Fernandes Diniz et al 2004;Newman 2004;Brancato 2008).…”

Section: Pressure Platesupporting

confidence: 80%

The processing of Pinus radiata: Pore size distribution changes in the cell wall structure studied by pressure plate technique and mercury intrusion porosimetry

Giacomozzi¹,

Joutsimo²,

Zelinka³

2019

BioRes

Self Cite

View full text Add to dashboard Cite

The pore size distribution of cell walls in softwood pulps was studied using the pressure plate technique and mercury intrusion porosimetry, which together make it possible to cover the range from 101 to 106 nm in pore sizes (mesopores and macropores). The differences in pore size distribution between never-dried pulp from a fiber line, industrially-dried pulp, and laboratory-dried pulps were evaluated. The results showed an increase in the relative pore volume (100 to 2,000 nm) between industrial washing and bleaching stages. Also, mercury porosimetry showed a broadening of the pore size distribution of cell walls after industrial drying. Results showed that, besides the changes in micropore and mesopore size distributions, the macropore range is also affected by processing and drying.

show abstract

Section: Pressure Platesupporting

confidence: 80%

The processing of Pinus radiata: Pore size distribution changes in the cell wall structure studied by pressure plate technique and mercury intrusion porosimetry

Giacomozzi¹,

Joutsimo²,

Zelinka³

2019

BioRes

Self Cite

View full text Add to dashboard Cite

show abstract

“…Jang et al (2013) reported that the LCNF with lower lignin content by an ozone treatment showed 5 to 6 times longer filtration time than non-treated LCNF with a higher lignin content. In contrast, the long filtration time of HCNF compared to LCNF and PCNF, is mainly due to the presence of the hygroscopic hemicellulose (Giacomozzi and Joutsimo 2015). According to Pejic et al (2008), the water retention value of hemp fibers decreased as a result of the removal of hemicellulose.…”

Section: Filtration Timementioning

confidence: 98%

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Park¹,

Han²,

Namgung³

et al. 2017

BioResources

View full text Add to dashboard Cite

Cellulose nanofibrils (CNF) can be divided into lignocellulose nanofibrils (LCNF), holocellulose nanofibrils (HCNF), and pure cellulose nanofibrils (PCNF), dependent upon their chemical composition. The effect of the chemical composition on the defibrillation efficiency and the properties of the CNFs prepared by wet disk-milling was investigated using six different wood species. The defibrillation efficiency was improved when the lignin and hemicellulose was removed, and smaller fibers with diameters in the order of PCNF > HCNF > LCNF were produced. The average diameter of the hardwood LCNF was finer than that of the softwood LCNFs, but there was no noticeable difference in the diameters of the HCNF and the PCNF from the different wood species. The filtration time of CNF suspensions and the tensile properties of nanopaper sheets were longer and higher, respectively, in the order of HCNF > PCNF > LCNF from different wood species.

show abstract

“…The changes were more visible in the EUC Slush sample, since this pulp was a more degraded pulp with lower drainability (25°SR), more deformations, and fibrillation as a result of its bleaching sequence (TCF), compared to the EUC sample. In the hornification process during the drying of the EUC sample, a fraction of the pores in the cell wall collapsed and closed irreversibly due to the formation of hydrogen bonds between adjacent surfaces, leading to fibril aggregation or coalescence (Giacomozzi and Joutsimo 2015). It would be expected that this sample presented high deformations (Giacomozzi and Joutsimo 2017).…”

Section: Pulp Fiber and Structure Experimental Characterizationmentioning

confidence: 99%

“3D computational simulation and experimental validation of structured materials: Case studies of tissue papers

Morais

Curto

2022

BioRes

View full text Add to dashboard Cite

The development and optimization of structured materials, such as tissue paper materials, benefit from modeling strategies that take into consideration its structural hierarchy at the fiber and the paper levels. The use of an innovative three-dimensional voxel approach to model both the fiber and the 3D paper structure were validated by comparison of the computational structures with the laboratory-made structures. The main goal of this work was to model tissue structures and obtain a computational implementation adapted for tissue products. The fibers were modeled in 3D according to their dimensions, and the structures produced by them were characterized using the Representative Elementary Volume (REV) and image analysis computational tools. This methodology made it possible to model the fibers according to their morphology, flexibility, and collapse, resulting in a tissue structure with thickness, porosity, relative bonding area, coverage, among other properties. The experimental design plan included the production and characterization of isotropic laboratory structures with basis weights of 20, 40, and 60 g/m2 with different eucalyptus fibers and beating degrees. With the aid of these advanced computational tools, mathematic models with predictive capacity for tissue properties such as softness, strength, and absorption can be developed.

show abstract

Drying Temperature and Hornification of Industrial Never-Dried Pinus radiata Pulps. 1. Strength, Optical, and Water Holding Properties

Cited by 17 publications

References 4 publications

The processing of Pinus radiata: Pore size distribution changes in the cell wall structure studied by pressure plate technique and mercury intrusion porosimetry

The processing of Pinus radiata: Pore size distribution changes in the cell wall structure studied by pressure plate technique and mercury intrusion porosimetry

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

“3D computational simulation and experimental validation of structured materials: Case studies of tissue papers

Contact Info

Product

Resources

About