Development and characterization of Bioblocks: a sustainable wood-based composite utilizing MDF residues, citric acid and polyols

IF 2.4 3区农林科学 Q1 FORESTRY

European Journal of Wood and Wood Products Pub Date : 2024-11-27 DOI:10.1007/s00107-024-02141-8

Peer Thorben Lewandowski, Erik Larnøy, Holger Militz

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Abstract

The study investigated the production process and properties of a new wood-based material called Bioblocks. This sustainable composite is made from medium-density-fibreboard (MDF) residues, citric acid and either sorbitol or hexanediol. The process involves mixing in-water diluted chemicals with the MDF residues and curing the mixture in a laboratory oven to esterify the sorbitol and wood components with citric acid. A design of experiment was used to determine the influence and optima of the different process factors, and an optimised trial further investigated the material properties. The density distribution, compression strength, and TS after 24 h immersion in water according to EN 317 of the Bioblocks were tested. The first trial showed that mainly the amount of water added impacts the product’s properties. The optimised material achieved a sufficient density distribution with an average density of about 420 kg/m³, a compression strength of up to 3.5 N/mm², and a TS of about 2%. Therefore, Bioblocks are a promising natural material to use waste MDF and substitute fossil, unsustainable materials.

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生物块的开发和表征：利用中密度纤维板残留物、柠檬酸和多元醇的可持续木基复合材料

这项研究调查了一种名为Bioblocks的新型木质材料的生产过程和性能。这种可持续的复合材料由中密度纤维板（MDF）残留物、柠檬酸和山梨糖醇或己二醇制成。该过程包括将水中稀释的化学物质与中密度纤维板残留物混合，并在实验室烤箱中固化混合物，将山梨醇和木材成分与柠檬酸酯化。通过实验设计确定了不同工艺因素对材料性能的影响及优化，并通过优化试验进一步考察了材料的性能。按照en317标准测试了生物块在水中浸泡24 h后的密度分布、抗压强度和TS。第一次试验表明，主要是水的添加量影响了产品的性能。优化后的材料实现了足够的密度分布，平均密度约为420 kg/m3，抗压强度高达3.5 N/mm2， TS约为2%。因此，生物块是一种很有前途的天然材料，可以利用废弃的中密度纤维板和替代化石，不可持续的材料。

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来源期刊

European Journal of Wood and Wood Products 工程技术-材料科学：纸与木材

CiteScore

5.40

自引率

3.80%

发文量

124

审稿时长

6.0 months

期刊介绍： European Journal of Wood and Wood Products reports on original research and new developments in the field of wood and wood products and their biological, chemical, physical as well as mechanical and technological properties, processes and uses. Subjects range from roundwood to wood based products, composite materials and structural applications, with related jointing techniques. Moreover, it deals with wood as a chemical raw material, source of energy as well as with inter-disciplinary aspects of environmental assessment and international markets. European Journal of Wood and Wood Products aims at promoting international scientific communication and transfer of new technologies from research into practice.