Wood shrinkage: influence of anatomy, cell wall architecture, chemical composition and cambial age

Leonardon, Mathilde; Altaner, Clemens M.; Vihermaa, Leena; Jarvis, Michael C.

doi:10.1007/s00107-009-0355-8

Cited by 41 publications

(21 citation statements)

References 30 publications

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“…The different shrinkage values in relation to the position in the trunk are confi rmed by many authors (Ying et al, 1994;Dumail and Castera, 1997;Kärki, 2001;Perstorper et al, 2001;Wang et al, 2008;Yamashita et al, 2009;Kord et al, 2010;Leonardon et al, 2010). Wood density can be considered the key indicator of wood quality.…”

Section: Uvodmentioning

confidence: 83%

Shrinkage of Grand Fir Wood and its Variability within the Stem

2012

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Section: Uvodmentioning

confidence: 83%

Shrinkage of Grand Fir Wood and its Variability within the Stem

2012

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“…Generally, hardwood pulps seem to show lower hygroexpansion than softwood pulp (*0.23% expansion for softwood, 0.13% for hardwood, paper density of *680 kg/m 3 ) [23]. The longitudinal and transverse expansion coefficients are reported to be 0.5-2.7 and 4-8% for compression wood, 1-2 and 5-8% for juvenile wood and 1-1.5 and 6-12% for mature wood [91]. Similarly, Joffre et al [70] found distinct differences between normal and compression wood tracheids, which can be related to the MFA, lignin content and the cylindrical structure.…”

Section: Fiber Curl and Twistmentioning

confidence: 96%

“…Likewise, the chemical characteristics of the fiber seem to have an influence on the effect of the MFA, as compression wood showed lower tangential shrinkage (5.94%) than juvenile wood (8.37%) at the same MFA (14.2°) [91]. Also, the degree of fiber restraining appears to have an effect.…”

Section: Microfibril Anglementioning

confidence: 96%

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Factors affecting the hygroexpansion of paper

Lindner

2017

J Mater Sci

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Paper is a widely used packaging material and is nowadays regaining importance, e.g., as bio-based and biodegradable material. Moreover, new technologies such as polymer-fiber composites, printed electronics and the deep drawing of paper are developing. The process stability and also the resulting quality of paper converting processes such as coating, metallization, printing, and the printing of electronics are highly affected by the hygroexpansion of paper. In order to reduce production instability and to choose and develop paper substrates with ideal characteristics, critical parameters need to be known. This paper offers an extensive overview of those parameters, starting at a molecular and microscopic level with the effect of the constituents and morphology of single fibers, before moving on to paper contents, chemical modifications and additives and finally concluding with paper production and fiber network modification. It was found that the major influences are single fiber sorption, inter-fiber contacts, microfibril angle, fiber morphology (length, width, curliness) and fiber orientation. This review gives new ideas and insights for technologists working in research, development and production optimization of paper-based products.

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“…In the age group considered, the correlation parameters did not reach consistent values to ensure the dependence between density and shrinkage percentages. Leonardon et al (2010) studied different anatomical and chemical factors of the wood and their influence on shrinkage in the main directions of wood, concluding that anatomical complexity, architecture of the constituent cells, and chemical composition of species can explain more precisely wood shrinkage than just the density of samples.…”

Section: Introductionmentioning

confidence: 99%

Density as Estimator of Dimensional Stability Quantities of Brazilian Tropical Woods

Almeida¹,

Almeida²,

Araújo³

et al. 2017

BioResources

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Wood is a material widely used in various sectors of construction, such as in structures and building components. The volume of wood extracted from tropical forests has reached a considerable amount, and this wood is marketed with popular names without prior characterization. Wood density is an easy property to measure, and its use as an estimator of other properties is very common in this sector. This study investigated the possibility of the estimation of important quantities in dimensional stability of Brazilian tropical woods by using the density at 12% moisture content, anhydrous density, and basic density. Testing the ability to estimate radial, axial, tangential, and volumetric shrinkage, anisotropy coefficient, coefficient of volumetric rate of volumetric shrinkage, as well as the rate of volumetric swelling using the densities above, with linear, exponential, geometric, and logarithmic models, the best determination coefficient was: R 2 = 19.58%. The results were, in summary, that the variable density was not a good estimator of the dimensional stability of the wood.

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Wood shrinkage: influence of anatomy, cell wall architecture, chemical composition and cambial age

Cited by 41 publications

References 30 publications

Shrinkage of Grand Fir Wood and its Variability within the Stem

Shrinkage of Grand Fir Wood and its Variability within the Stem

Factors affecting the hygroexpansion of paper

Density as Estimator of Dimensional Stability Quantities of Brazilian Tropical Woods

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