A kind of method for preparing nano lignin balls from corn stover
A technology of nano-lignin and corn stalks, which is applied in the field of nano-materials, can solve problems such as difficult recycling, low solvent exchange rate, and long dialysis time, and achieve the effects of low cost, shortened dialysis time, and increased exchange rate
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Embodiment 1
[0039] A method for preparing nano-lignin balls from corn stover, the scheme is as follows:
[0040] Step 1, corn stalk pretreatment, 10g of dry corn stalk is mechanically pulverized and sieved to obtain corn stalk powder for later use;
[0041] Step 2: Separating cellulose, adding the crushed corn stalks into an aqueous solution of tetrahydrofuran with a volume fraction of 45%, the substrate concentration of 8%, and then adding an acidulant with a mass fraction of 0.2%, stirring and mixing evenly, and then adding In the autoclave, the temperature is controlled to 135°C and the reaction is carried out for 15min;
[0042] Step 3, post-processing, the reaction solution is cooled to room temperature and filtered with a filter to obtain the lignin-dissolved treatment solution and filter residue cellulose; the treatment solution is diluted to 15 times with tetrahydrofuran solvent, for subsequent use;
[0043] Step 4, dialysis treatment, put the diluted treatment solution into a dial...
Embodiment 2
[0053] A method for preparing nano-lignin balls from corn stover, the scheme is as follows:
[0054] Step 1, corn stalk pretreatment, 15g dry corn stalk is mechanically pulverized and sieved to obtain corn stalk powder for later use;
[0055] Step 2: Separation of cellulose, adding the crushed corn stalks into an aqueous solution of tetrahydrofuran with a volume fraction of 55%, the substrate concentration of 12%, and then adding an acidulant with a mass fraction of 0.5%, stirring and mixing evenly and then adding In the autoclave, the temperature is controlled to 145 ℃ to carry out the reaction for 30min;
[0056] Step 3, post-processing, the reaction solution is cooled to room temperature and filtered with a filter to obtain the lignin-dissolved treatment solution and filter residue cellulose; the treatment solution is diluted to 20 times with tetrahydrofuran solvent, for use;
[0057] Step 4, dialysis treatment, put the diluted treatment solution into a dialysis membrane f...
Embodiment 3
[0067] A method for preparing nano-lignin balls from corn stover, the scheme is as follows:
[0068] Step 1, corn stalk pretreatment, 20g dry corn stalk is mechanically pulverized and sieved to obtain corn stalk powder for later use;
[0069] Step 2: Separation of cellulose, adding the crushed corn stalks into an aqueous solution of tetrahydrofuran with a volume fraction of 65%, the substrate concentration of 15%, and then adding an acidulant with a mass fraction of 0.8%, stirring and mixing evenly and then adding In the autoclave, the temperature is controlled to 155 ℃ to carry out the reaction for 60min;
[0070] Step 3, post-processing, the reaction solution is cooled to room temperature and filtered with a filter to obtain the lignin-dissolved treatment solution and filter residue cellulose; the treatment solution is diluted to 30 times with tetrahydrofuran solvent, for use;
[0071] Step 4, dialysis treatment, put the diluted treatment solution into a dialysis membrane f...
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