The pretreatment methods were based on reference [20 (link)] with minor modifications. Firstly, 20 g acid-pretreated wheat straw was soaked in a 200 mL ethanol solution of (20% w/v) rosin in ethanol at room temperature and atmospheric pressure for 4 h. Following this, the product was vacuum filtered and rinsed thoroughly with ethanol. Subsequently, the filtered product was dried in an oven at 60 °C for 6 h. Finally, according to the optimum hot-pressing process conditions previously determined, the dried product was hot-pressed into boards. The resulting board was designated as WSA-R.
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