Manufacture method of eleostearic acid graft modification wood fibers
A wood fiber, graft modification technology, applied in the field of chemical graft modified wood fiber manufacturing, can solve the problem of not forming a strong chemical bond connection, etc., to achieve the effect of environmental friendliness and abundant resources
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Embodiment 1
[0026] In a four-necked flask equipped with a thermometer, a stirrer, and a condenser, add 2 parts by mass of wood fiber, 30 mL / (g of poplar wood fiber mass) anhydrous pyridine, and 2 parts of lignocellulosic acid chloride. After mixing at room temperature (about 25°C), add 0.1 parts by mass of the catalyst N,N-dimethylaminopyridine and react at a constant temperature of 50°C for 6 hours; after the reaction is completed, add 50 mL of ethanol aqueous solution with a concentration of 50% by mass and stir for 30 minutes while hot Suction and wash with a small amount of ethanol three times, and then with acetone once. Then, it was extracted with acetone in a Soxhlet extractor for 16 hours to remove unreacted small molecule compounds, and then dried in an oven at 60±2°C for 24 hours. The weight gain percentage of the resulting lignocellulose was 15.81%.
Embodiment 2
[0028] In a four-necked flask equipped with a thermometer, a stirrer, and a condenser, add 2 parts by mass of wood fiber, 30 mL / (g of poplar wood fiber mass) anhydrous pyridine, and 2 parts of lignocellulosic acid chloride. After mixing at room temperature (about 25°C), add 0.1 parts by mass of the catalyst N,N-dimethylaminopyridine, react at 70°C for 6h; after the reaction, add 50mL 50% ethanol aqueous solution and stir for 30min, filter while hot, and use a small amount of ethanol Pump and wash three times and then with acetone again. Then, it was extracted with acetone in a Soxhlet extractor for 16 hours to remove unreacted small molecule compounds, and then dried in an oven at 60±2°C for 24 hours. The weight gain percentage of the obtained lignocellulose was 41.59%.
Embodiment 3
[0030] In a four-necked flask equipped with a thermometer, a stirrer, and a condenser, add 2 parts by mass of wood fiber, 30 mL / (g of poplar wood fiber mass) anhydrous pyridine, and 2 parts of lignocellulosic acid chloride. After mixing at room temperature (about 25°C), add 0.1 parts by mass of the catalyst N,N-dimethylaminopyridine, and react at 80°C for 6 hours; after the reaction, add 50mL of 50% ethanol aqueous solution and stir for 30 minutes, filter while hot, and use a small amount of ethanol Pump and wash three times and then with acetone again. Then, it was extracted with acetone in a Soxhlet extractor for 16 hours to remove unreacted small molecule compounds, and then dried in an oven at 60±2°C for 24 hours. The weight gain percentage of the obtained lignocellulose was 43.22%.
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