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

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL Resources Conservation and Recycling Pub Date : 2024-10-28 DOI:10.1016/j.resconrec.2024.107983

Helong Song , Koh Chuen Hon , Florent Gauvin , Samuel Pantaleo , Felix Berger , Wei Chen , H.J.H. 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.

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生物基隔热材料的烷基酮二聚体疏水处理耐久性评估

生物基复合材料因其可持续性和低导热性，越来越多地被用作建筑中的隔热材料。然而，生物基复合材料的高吸湿性会对其性能产生负面影响，并存在霉菌生长的风险，从而缩短产品的使用寿命。本研究采用烷基酮二聚体（AKD）作为一种环保、经济的解决方案，对菌丝和草这两种生物基复合材料进行疏水处理，以提高它们的耐久性。我们比较了疏水改性前后生物基复合材料的物理化学特性、湿热性能和抗霉菌生长性能，同时评估了它们在不同气候条件下模拟建筑围护结构中的耐久性。结果表明，改性后的生物基复合材料与 AKD 接枝良好。改性后，生物基复合材料的吸水性明显降低，抗霉菌生长能力显著提高。此外，湿热模拟显示，AKD 改性可有效提高其在不同气候条件下的适用性，尤其是在应用改性草复合材料时。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.