Durability assessment of alkyl ketene dimer hydrophobic treatment of bio-based thermal insulation materials

Helong Song; C.H. Koh; Florent Gauvin; Samuel Pantaléo; Félix Berger; Wei Chen; H.J.H. (Jos) Brouwers

doi:10.1016/j.resconrec.2024.107983

Durability assessment of alkyl ketene dimer hydrophobic treatment of bio-based thermal insulation materials

Helong Song, C.H. Koh, Florent Gauvin (Corresponding author), Samuel Pantaléo, Félix Berger, Wei Chen, H.J.H. (Jos) Brouwers

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Abstract

Bio-based composites are increasingly used as thermal insulation materials in construction due to sustainability and low thermal conductivity. However, their high moisture absorption can negatively affect performance and mould growth risk, shortening product lifespan. This study introduces alkyl ketene dimer (AKD) as an eco-friendly and economical solution for the hydrophobic treatment of two bio-based composites, mycelium and grass, to enhance their durability. We compare the physicochemical properties, hygrothermal performance, and mould growth resistance of bio-based composites before and after hydrophobic modification while evaluating their durability in simulated building envelopes across different climates. Results showed that the modified bio-based composites were well-grafted with AKD. The water absorption of bio-based composites significantly decreased after modification, and the mould growth resistance capacity of modified composites was significantly improved. Moreover, hygrothermal simulations reveal that AKD modification effectively enhances their suitability under different climate profiles, particularly when modified grass composites are applied.

Original language	English
Article number	107983
Number of pages	10
Journal	Resources, Conservation and Recycling
Volume	212
DOIs	https://doi.org/10.1016/j.resconrec.2024.107983
Publication status	Published - 28 Oct 2024

Funding

This work is financially supported by the China Scholarship Council (Grant No. 202006150020), NWO (The Netherlands Organisation for Scientific Research) RAAK: Bio-Iso project (RAAK.MKB12.018 Bio-Iso), and Eindhoven University of Technology. The authors also gratefully acknowledge Fairm (The Netherlands) and Gramitherm (Belgium) for the provision of mycelium composites and grass composites, respectively.

Funders	Funder number
Eindhoven University of Technology
China Scholarship Council	202006150020
Nederlandse Organisatie voor Wetenschappelijk Onderzoek	RAAK.MKB12.018 Bio-Iso

Keywords

Bio-based composites
Hydrophobic treatment
Mould growth
Thermal insulation
Durability

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10.1016/j.resconrec.2024.107983

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title = "Durability assessment of alkyl ketene dimer hydrophobic treatment of bio-based thermal insulation materials",

abstract = "Bio-based composites are increasingly used as thermal insulation materials in construction due to sustainability and low thermal conductivity. However, their high moisture absorption can negatively affect performance and mould growth risk, shortening product lifespan. This study introduces alkyl ketene dimer (AKD) as an eco-friendly and economical solution for the hydrophobic treatment of two bio-based composites, mycelium and grass, to enhance their durability. We compare the physicochemical properties, hygrothermal performance, and mould growth resistance of bio-based composites before and after hydrophobic modification while evaluating their durability in simulated building envelopes across different climates. Results showed that the modified bio-based composites were well-grafted with AKD. The water absorption of bio-based composites significantly decreased after modification, and the mould growth resistance capacity of modified composites was significantly improved. Moreover, hygrothermal simulations reveal that AKD modification effectively enhances their suitability under different climate profiles, particularly when modified grass composites are applied.",

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AU - Song, Helong

AU - Koh, C.H.

AU - Gauvin, Florent

AU - Pantaléo, Samuel

AU - Berger, Félix

AU - Chen, Wei

AU - Brouwers, H.J.H. (Jos)

PY - 2024/10/28

Y1 - 2024/10/28

N2 - Bio-based composites are increasingly used as thermal insulation materials in construction due to sustainability and low thermal conductivity. However, their high moisture absorption can negatively affect performance and mould growth risk, shortening product lifespan. This study introduces alkyl ketene dimer (AKD) as an eco-friendly and economical solution for the hydrophobic treatment of two bio-based composites, mycelium and grass, to enhance their durability. We compare the physicochemical properties, hygrothermal performance, and mould growth resistance of bio-based composites before and after hydrophobic modification while evaluating their durability in simulated building envelopes across different climates. Results showed that the modified bio-based composites were well-grafted with AKD. The water absorption of bio-based composites significantly decreased after modification, and the mould growth resistance capacity of modified composites was significantly improved. Moreover, hygrothermal simulations reveal that AKD modification effectively enhances their suitability under different climate profiles, particularly when modified grass composites are applied.

AB - Bio-based composites are increasingly used as thermal insulation materials in construction due to sustainability and low thermal conductivity. However, their high moisture absorption can negatively affect performance and mould growth risk, shortening product lifespan. This study introduces alkyl ketene dimer (AKD) as an eco-friendly and economical solution for the hydrophobic treatment of two bio-based composites, mycelium and grass, to enhance their durability. We compare the physicochemical properties, hygrothermal performance, and mould growth resistance of bio-based composites before and after hydrophobic modification while evaluating their durability in simulated building envelopes across different climates. Results showed that the modified bio-based composites were well-grafted with AKD. The water absorption of bio-based composites significantly decreased after modification, and the mould growth resistance capacity of modified composites was significantly improved. Moreover, hygrothermal simulations reveal that AKD modification effectively enhances their suitability under different climate profiles, particularly when modified grass composites are applied.

KW - Bio-based composites

KW - Hydrophobic treatment

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Durability assessment of alkyl ketene dimer hydrophobic treatment of bio-based thermal insulation materials

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Keywords

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