The effect of a superhydrophobic coating on moisture absorption and tensile strength of 3D-printed carbon-fibre/polyamide

P. B. Kreider; A. Cardew-Hall; S. Sommacal; A. Chadwick; S. Hümbert; S. Nowotny; D. Nisbet; A. Tricoli; P. Compston

doi:10.1016/j.compositesa.2021.106380

The effect of a superhydrophobic coating on moisture absorption and tensile strength of 3D-printed carbon-fibre/polyamide

P. B. Kreider^*, A. Cardew-Hall, S. Sommacal, A. Chadwick, S. Hümbert, S. Nowotny, D. Nisbet, A. Tricoli, P. Compston

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

This work investigates the effectiveness of fluorinated silica-based superhydrophobic coatings to protect 3D-printed carbon-fibre/polyamide composites against moisture-induced degradation. Increasing exposure time in wet and humid environments led to a reduction of tensile strength and an increase in experienced strain. However, the coated PA demonstrated 6.7–12.4% higher tensile yield strength than the uncoated PA. High-resolution X-ray micro computed tomography (μCT) was used to image the microstructure and revealed that the superhydrophobic coating effectively prevented liquid water penetration into 3D-printed polyamide and delayed water vapour-driven mechanical degradation. The presence of the superhydrophobic coating eliminated the liquid water presence in the surface features of the PA matrix and reduced the moisture-induced swelling of the polyamide matrix by about 53% after 168 h under water. Further optimisation of these coatings may provide a solution to enhance the performance of PA composites in humid and wet environments.

Original language	English
Article number	106380
Journal	Composites Part A: Applied Science and Manufacturing
Volume	145
DOIs	https://doi.org/10.1016/j.compositesa.2021.106380
Publication status	Published - Jun 2021

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Kreider, P. B., Cardew-Hall, A., Sommacal, S., Chadwick, A., Hümbert, S., Nowotny, S., Nisbet, D., Tricoli, A., & Compston, P. (2021). The effect of a superhydrophobic coating on moisture absorption and tensile strength of 3D-printed carbon-fibre/polyamide. Composites Part A: Applied Science and Manufacturing, 145, Article 106380. https://doi.org/10.1016/j.compositesa.2021.106380

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title = "The effect of a superhydrophobic coating on moisture absorption and tensile strength of 3D-printed carbon-fibre/polyamide",

abstract = "This work investigates the effectiveness of fluorinated silica-based superhydrophobic coatings to protect 3D-printed carbon-fibre/polyamide composites against moisture-induced degradation. Increasing exposure time in wet and humid environments led to a reduction of tensile strength and an increase in experienced strain. However, the coated PA demonstrated 6.7–12.4% higher tensile yield strength than the uncoated PA. High-resolution X-ray micro computed tomography (μCT) was used to image the microstructure and revealed that the superhydrophobic coating effectively prevented liquid water penetration into 3D-printed polyamide and delayed water vapour-driven mechanical degradation. The presence of the superhydrophobic coating eliminated the liquid water presence in the surface features of the PA matrix and reduced the moisture-induced swelling of the polyamide matrix by about 53% after 168 h under water. Further optimisation of these coatings may provide a solution to enhance the performance of PA composites in humid and wet environments.",

keywords = "A. Polymer-matrix composites (PMCs), B. Environmental degradation, B. Surface properties, D. CT analysis",

author = "Kreider, {P. B.} and A. Cardew-Hall and S. Sommacal and A. Chadwick and S. H{\"u}mbert and S. Nowotny and D. Nisbet and A. Tricoli and P. Compston",

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AU - Kreider, P. B.

AU - Cardew-Hall, A.

AU - Sommacal, S.

AU - Chadwick, A.

AU - Hümbert, S.

AU - Nowotny, S.

AU - Nisbet, D.

AU - Tricoli, A.

AU - Compston, P.

PY - 2021/6

Y1 - 2021/6

N2 - This work investigates the effectiveness of fluorinated silica-based superhydrophobic coatings to protect 3D-printed carbon-fibre/polyamide composites against moisture-induced degradation. Increasing exposure time in wet and humid environments led to a reduction of tensile strength and an increase in experienced strain. However, the coated PA demonstrated 6.7–12.4% higher tensile yield strength than the uncoated PA. High-resolution X-ray micro computed tomography (μCT) was used to image the microstructure and revealed that the superhydrophobic coating effectively prevented liquid water penetration into 3D-printed polyamide and delayed water vapour-driven mechanical degradation. The presence of the superhydrophobic coating eliminated the liquid water presence in the surface features of the PA matrix and reduced the moisture-induced swelling of the polyamide matrix by about 53% after 168 h under water. Further optimisation of these coatings may provide a solution to enhance the performance of PA composites in humid and wet environments.

AB - This work investigates the effectiveness of fluorinated silica-based superhydrophobic coatings to protect 3D-printed carbon-fibre/polyamide composites against moisture-induced degradation. Increasing exposure time in wet and humid environments led to a reduction of tensile strength and an increase in experienced strain. However, the coated PA demonstrated 6.7–12.4% higher tensile yield strength than the uncoated PA. High-resolution X-ray micro computed tomography (μCT) was used to image the microstructure and revealed that the superhydrophobic coating effectively prevented liquid water penetration into 3D-printed polyamide and delayed water vapour-driven mechanical degradation. The presence of the superhydrophobic coating eliminated the liquid water presence in the surface features of the PA matrix and reduced the moisture-induced swelling of the polyamide matrix by about 53% after 168 h under water. Further optimisation of these coatings may provide a solution to enhance the performance of PA composites in humid and wet environments.

KW - A. Polymer-matrix composites (PMCs)

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The effect of a superhydrophobic coating on moisture absorption and tensile strength of 3D-printed carbon-fibre/polyamide

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