Abstract
Raw materials used in particleboard production may have different chemical properties as they have different origins, nature, and storage histories. One of the most important factors is the acidity of the wood which affects the process of bond line formation. Thus, determination of the acid buffering capacity (ABC) of a raw material helps to adjust the optimal amount of hardener in the adhesive. In the present study, three methods for pH-metric ABC determination in the presence of lignocellulosic material were compared. Models that correlate the hardener amount with the internal bonding of particleboards were built from the ABC results. The approach was tested on three materials of different acidity—pine, oak, and ammonia-treated oak. The developed models allowed the prediction of the optimal amount of hardener for the maximized internal bond of the boards. The experimental verification of the models showed a high convergence of the calculated and empirical results.
Highlights
Particleboards produced from raw wood material are highly affected by the properties of the wood
Methodologies of acid buffering capacity determination found in the literature do not take into account the presence of wood and, provide variable results that seem to be burdened with error
It was shown that a newly developed effective method of ABC determination for wood can be a basis for building mathematical models that correlate the hardener amount with the internal bonding of a board, so that the optimal amount of hardener can be predicted for the Methodologies of acid buffering capacity determination found in the literature do not take into account the presence of wood and, provide variable results that seem to be burdened with error
Summary
Particleboards produced from raw wood material are highly affected by the properties of the wood It has been reported in the literature that changes in the raw material caused by the storage time, age of tree, location in stem, and origin may have a strong impact on its chemical properties, and, subsequently, on the mechanical and physical properties of wood-based materials [1,2,3,4]. These phenomena impose adjusting conditions on the process, especially in terms of the adhesive used and the amount of hardener. The buffering capacity of a material is the sum of the buffering capacities of each individual acidic and basic component and the effect of the interactions among them [8]
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