Contact Angle on Two Canadian Woods: Influence of Moisture Content and Plane of Section

Tomczak, Fabio; Riedl, Bernard

doi:10.1002/9781118795620.ch17

Cited by 1 publication

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For Ethylene glycol, advancing contact angles were similar for 0%, 50%, and 100% RH (~50°, see A possible explanation for this wetting behaviour could be related to the interaction of water in the environment with the natural fibre, and the possible migration of different extractives to the fibre surface at different humidity levels [29]. Furthermore, a similar wetting behaviour of water on a phospholipid DPPC layer deposited on glass (contact angles increasing while humidity increases and a sharp decrease at a high humidity level) was found by Chibowski et al [30], who suggested that each thermodynamic state of the layer is characterized by a specific hydration level and a specific distribution of water molecules.…”

Section: Contact Angle Measurements and Surface Energy Analysismentioning

confidence: 94%

Effect of humidity during manufacturing on the interfacial strength of non-pre-dried flax fibre/unsaturated polyester composites

Fuentes

Ting

Dupont‐Gillain

et al. 2016

Composites Part A: Applied Science and Manufacturing

View full text Add to dashboard Cite

The influence of moisture content in the environment during manufacture of a novel cobalt-free UP matrix reinforced with flax fibres, on the fibre-matrix adhesion was studied. Flax surface energy was experimentally determined by measuring contact angles on technical fibres, using the Wilhelmy technique and the acid-base theory. The mechanical strength of the interface under different humidity conditions was characterized by the critical local value of interfacial shear stress, τ d , at the moment of crack initiation, which was assessed by single-fibre pull-out tests. Differential scanning calorimetry and x-ray photoelectron spectroscopy analysis gave further insight into the topic. The results suggest that the effect of humidity during manufacturing on the composite interface might be limited. However, longitudinal composite strength decreased somewhat for composites produced in humid conditions, showing that there is some detrimental effect of high levels of moisture during cure on the fibre mechanical performance, likely caused by some fibre degradation.

show abstract

Section: Contact Angle Measurements and Surface Energy Analysismentioning

confidence: 94%