Temperature effect on dynamic wetting of cellulosic substrates by molten polymers for composite processing - Archive ouverte HAL Access content directly
Journal Articles Composites Part A: Applied Science and Manufacturing Year : 2018

Temperature effect on dynamic wetting of cellulosic substrates by molten polymers for composite processing

Abstract

Impregnation of plant fibre reinforcements by a molten polymer involves many phenomena still poorly understood , related to the solid morphology and its surface chemistry, but also to the temperature effect on liquid properties and solid/liquid interactions. The present work focuses on the temperature effect on forced dynamic wetting, using the Wilhelmy method and two model materials: a cellulosic film and two totally wetting paraffin oils. The results show that the dynamic contact angle vs. the capillary number (Ca) plot appears as a master curve. This curve is split in two domains. The domain associated with large Ca (Ca > 10 -3 ) is well described by the hydrodynamic approach. The domain with Ca < 10-3 corresponds to wetting processes operating on a smaller scale, which are more sensitive to the physico-chemical heterogeneities of the substrate. This study addresses the mechanisms governing the capillary pressure, void formation and interface generation during composite manufacturing.
Fichier principal
Vignette du fichier
Pucci et al. - 2018 - Temperature effect on dynamic wetting of cellulosi_preprint.pdf (1.61 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

hal-01930601 , version 1 (03-09-2020)

Identifiers

Cite

Monica Francesca Pucci, Benoît Duchemin, Moussa Gomina, Joël Bréard. Temperature effect on dynamic wetting of cellulosic substrates by molten polymers for composite processing. Composites Part A: Applied Science and Manufacturing, 2018, 114, pp.307-315. ⟨10.1016/j.compositesa.2018.08.031⟩. ⟨hal-01930601⟩
116 View
139 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More