Swelling of compressed cellulose fiber webs in organic liquids

Mantanis, George I.; Young, Richard M.; Rowell, Roger M.

doi:10.1007/bf00812768

Cited by 144 publications

(12 citation statements)

References 12 publications

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“…Since the decrease in tensile strength only occurs for the starch‐containing samples, it can be assumed that there is no hydrolytic degradation and the starch is causal for the water‐induced changes in the material properties, which can be described as physical aging. A possible reason could be the swelling effects of the hydrophilic starch particles, which damage the surrounding matrix, as is already known for the use of various natural fibers 33–37 . This swelling effect could also lead to damage for the weathered samples, whereby it can be assumed that a minor cross‐linking of the PLA matrix by the UV radiation takes place simultaneously, as it was also observed by Lv, Gu et al 6 .…”

Section: Resultsmentioning

confidence: 79%

Resistance of poly(lactic acid)/starch composites to weathering effects

Goetjes,

Zarges,

Heim

2023

J of Applied Polymer Sci

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In order to produce a completely bio‐based and cost‐effective filled polymer, PLA and native potato starch as a filler were compounded by twin screw extrusion. Subsequently injection molded test specimens were manufactured and subjected to artificial weathering as well as different storages (high temperature, high humidity, freeze, water) for 504 h with a view to long‐term resistance. Depending on the starch content a significant reduction of up to 100% in tensile strength can be seen, as the starch accelerates or inhibits the triggered aging effects. As a result of the influence of humidity and water as well as artificial weathering, stress cracks are formed in starch‐containing samples. Storage at an elevated temperature (70°C, 50% RH) leads to polymer degradation of the PLA. This degradation can be inhibited by the addition of starch. Freezing storage has no significant influence on the mechanical and structural properties of the PLA starch composites.

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Section: Resultsmentioning

confidence: 79%

Resistance of poly(lactic acid)/starch composites to weathering effects

Goetjes,

Zarges,

Heim

2023

J of Applied Polymer Sci

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“…Paper may undergo some structural and chemical changes when a liquid penetrates into it. One phenomenon that has a strong effect on the end use properties of paper is swelling (Mantanis et al 1995), which, as demonstrated by previous studies, can be studied using the OCT method (Fabritius and Myllylä 2006b). When swelling occurs, intermolecular bonds are broken within fibres by internal stress and the additional air-fibre interfaces arise.…”

Section: Discussionmentioning

confidence: 96%

Liquid sorption investigation of porous media by optical coherence tomography

Fabritius¹,

Myllylä²

2006

J. Phys. D: Appl. Phys.

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This paper introduces an alternative optical method to measuring liquid penetration into porous highly scattering media. Using pure glycerol, the method was tested by measuring glycerol sorption into cellulose fibre tissue with a grammage of 115 g m−2. During the wetting process, dynamical changes in the scattering properties of the fibre tissue were detected by optical coherence tomography. Measurements were made from a single point on the front and back surface of a sample. Although the effect of penetration on the optical properties of a porous structure can be seen independent of measurement direction, the border between the dry and wetted area is detectable only in front surface measurements. In addition, the paper experimentally investigates the temporally and spatially dependent swelling behaviour of paper.

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“…This reduces the degree of order within the fibres and increases their surface area. The effects of swelling are largely dependent on the type of fibre and solute being used [9,10].…”

Section: Paper Wetting and Swellingmentioning

confidence: 99%

“…Scientists have investigated the phenomenon of swelling for decades attempting to determine the factors that influence it. Most of the available information is based on variations recorded in dilatometric or gravimetric measurements [9,10]. Due to the complexity of the phenomenon, there is no consensus on the relative influence of the different factors affecting it.…”

Section: Paper Wetting and Swellingmentioning

confidence: 99%