Method for preparing renewable polysaccharide etherate composite gel from cornstalk cores
A composite gel and corn stalk technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problems of reducing the application value of corn stalks and not having large-scale industrial applications. Achieve the effect of environmental friendliness, low cost and good adsorption performance
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Embodiment
[0037] Example 1: The preparation method of the composite gel of corn stalk regenerated polysaccharide etherification, the specific operation is as follows:
[0038] (1) Preparation process of corn stalks
[0039] The corn stalks are air-dried, and the water content of the air-dried raw materials is 10%. After manual peeling, the stalk cores are mechanically ground, and then screened through a 40-mesh but not more than 60-mesh sieve to qualify as raw materials;
[0040] (2) Benzene-alcohol extraction treatment of qualified corn stalk raw material
[0041] Weigh 5g of raw material and wrap it with qualitative filter paper, tie it with cotton thread, put it into a 250ml Soxhlet extractor, add 250ml of benzene-alcohol mixture (benzene and 95% ethanol mixture with a mass percentage concentration of 4: 1 mixed, that is, 200ml of benzene mixed with 50ml of 95% ethanol.), install a condenser, connect the extraction instrument, as for the water bath, turn on the cooling water, adjust...
Embodiment 2
[0054] Example 2: The preparation method of the corn stalk regenerated polysaccharide ether compound composite gel, the specific operation is as follows:
[0055] (1) Preparation process of corn stalks
[0056] Corn stalks are air-dried, and the water content of the air-dried raw materials is 15%. After manual peeling, the stalk cores are mechanically ground, and then screened through a 180-mesh but not more than 300-mesh sieve to qualify as raw materials.
[0057] (2) Benzene-alcohol extraction treatment of qualified corn stalk raw material
[0058]Weigh 10g of raw material, wrap it with qualitative filter paper, tie it with cotton thread, put it into a 500ml Soxhlet extractor, add 500ml of benzene-alcohol mixture (benzene and absolute ethanol mixture are mixed at a volume ratio of 1:1 and 250ml of benzene mixed with 250ml of absolute ethanol.), install the condenser, connect the extraction instrument, turn on the cooling water in the water bath, adjust the heater of the wat...
Embodiment 3
[0071] Example 3: The preparation method of corn stalk cob regenerated polysaccharide ether compound composite gel, the specific operation is as follows:
[0072] (1) Preparation process of corn stalks
[0073] Corn stalks are air-dried, and the water content of the air-dried raw materials is 25%. After manual peeling, the stalk core is mechanically ground, and then screened through a 280-mesh but not more than 400-mesh sieve to qualify as a raw material.
[0074] (2) Benzene-alcohol extraction treatment of qualified corn stalk raw material
[0075] Weigh 20g of raw material, wrap it with qualitative filter paper, tie it with cotton thread, put it into a 1000ml Soxhlet extractor, add 1000ml of benzene-alcohol mixture (benzene and absolute ethanol mixture is mixed at a volume ratio of 1:4 and 200ml of benzene mixed with 800ml of absolute ethanol.), install a condenser, connect the extraction instrument, turn on the cooling water in the water bath, adjust the heater of the wate...
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