Preparation method and application of black phosphorene/corn stalk core holocellulose ether mixed gel
A technology that integrates cellulose and black phosphorene, applied in the field of preparation of carbohydrate derivative blend gels, to achieve high-efficiency adsorption performance
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[0020] Example 1: Preparation method of black phosphorene / corn stover cellulose etherate blend gel, the specific operation is as follows:
[0021] (1) Preparation process of corn stover
[0022] Corn stalks are air-dried, and the moisture content of the air-dried raw materials is 5%. After manual peeling, the straws are mechanically ground and then screened by a 100-mesh but not 300-mesh sieve as qualified raw materials;
[0023] (2) Dissolving and extracting qualified raw material holocellulose
[0024] The conditions for dissolution and extraction of holocellulose are as follows: the concentration of lithium hydroxide in the solution is 5.0%, the concentration of thiourea is 10%, the solution is first cooled to -10°C, and the ratio of the mass of the absolute dry corn stover raw material to the volume of the mixed solution is 1g : 20mL;
[0025] The specific dissolution steps are as follows: Weigh 10g lithium hydroxide and 20g thiourea, mix them with 199.5mL water and dissolve them, ...
Example Embodiment
[0032] Example 2: Preparation method of black phosphorene / corn stover cellulose etherate blend gel, the specific operation is as follows:
[0033] (1) Preparation process of corn stover
[0034] Corn stalks are air-dried, and the water content of the air-dried raw materials is 10%. After manual peeling, the straws are mechanically ground and then screened by a 280-mesh screen but not a 400-mesh screen as qualified raw materials;
[0035] (2) Dissolving and extracting qualified raw material holocellulose
[0036] The conditions for the dissolution and extraction of holocellulose are as follows: the concentration of lithium hydroxide in the solution is 7.0%, the concentration of thiourea is 20%, the solution is first cooled to -20°C, and the volume ratio of the raw material quality of absolutely dry corn stover to the cooled solution is 1g: 100mL.
[0037] The specific dissolution steps are as follows: weigh 70g lithium hydroxide and 200g thiourea, mix them with 998.9mL water and dissolv...
Example Embodiment
[0044] Example 3: Preparation method of black phosphorene / corn stover cellulose etherate blend gel, the specific operation is as follows:
[0045] (1) Preparation process of corn stover
[0046] Corn stalks are air-dried, and the water content of the air-dried raw materials is 25%. After manual peeling, the stalks are mechanically ground and then screened by a 400-mesh but not 600-mesh sieve as qualified raw materials;
[0047] (2) Dissolving and extracting qualified raw material holocellulose
[0048] The conditions for the dissolution and extraction of holocellulose are as follows: the concentration of lithium hydroxide in the solution is 8.0%, the concentration of thiourea is 30%, the solution is first cooled to -30°C, and the volume ratio of the raw material quality of absolutely dry corn stover to the cooled solution is 1g: 200mL.
[0049] The specific dissolution steps are as follows: weigh 160g lithium hydroxide and 600g thiourea, mix them with 1996.7mL of water and dissolve the...
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