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Method for synchronously preparing multiple biomass materials

A technology of biomass materials and waste biomass, which is applied in the field of synchronous preparation of multiple biomass materials, can solve the problems of simultaneous preparation of multiple materials, complex processes, harsh conditions, etc., and improve the potential application range and particle size distribution Uniform and high dispersion effect

Inactive Publication Date: 2020-03-03
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although there have been some reports on the preparation of cellulose crystals, lignin nanoparticles and carbon quantum dots, most of the methods involve complex processes and harsh conditions, time-consuming (up to 3 days) and expensive, so it is difficult to popularize and apply , and there is no report on the simultaneous preparation of multiple materials

Method used

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  • Method for synchronously preparing multiple biomass materials
  • Method for synchronously preparing multiple biomass materials
  • Method for synchronously preparing multiple biomass materials

Examples

Experimental program
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Effect test

Embodiment 1

[0052] (1) The corn stalks were crushed and sieved with 80 meshes, washed twice with ultrapure water, and dried at 60°C until constant weight.

[0053] (2) Put the corn stalks treated in step (1) in the reaction kettle, add dissolved H 2 SO 4 The solvent is tetrahydrofuran-water (tetrahydrofuran: water is 50:50, v / v) acid solution, then put it still in the blast drying oven, after hydrothermal treatment at 160°C for 60min, filter to obtain the treatment solution, the H 2 SO 4 The concentration in acid solution is 0.1mol / L.

[0054] (3) The obtained treatment solution was centrifuged at 12000 rpm for 10 min, and the obtained precipitate was cellulose crystals.

[0055] (4) Add 30 times the volume of ultrapure water to the supernatant, centrifuge at 12,000 rpm for 10 minutes, and the resulting precipitate is lignin nanoparticles.

[0056] (5) Put the supernatant obtained by centrifugation into a 1000 Da dialysis bag, and dialyze for 12 hours, and the solution in the obtained...

Embodiment 2

[0059] (1) The corn stalks were crushed and sieved with 80 meshes, washed twice with ultrapure water, and dried at 60°C until constant weight.

[0060] (2) Put the corn stalks treated in step (1) in the reaction kettle, add dissolved H 2 SO 4 The solvent is in the acid solution of tetrahydrofuran-water (tetrahydrofuran: water is 45:65, v / v), then put it still in the blast drying oven, after hydrothermal treatment at 180 ° C for 40 minutes, filter to obtain the treatment solution, the H 2 SO 4 The concentration in acid solution is 0.15mol / L.

[0061] (3) The obtained treatment solution was centrifuged at 12000 rpm for 10 min, and the obtained precipitate was cellulose crystals.

[0062] (4) Add 25 times the volume of ultrapure water to the supernatant, centrifuge at 12,000 rpm for 10 minutes, and the resulting precipitate is lignin nanoparticles.

[0063] (5) Put the supernatant obtained by centrifugation into a 1000 Da dialysis bag, and dialyze for 12 hours, and the soluti...

Embodiment 3

[0066] (1) The corn stalks were crushed and sieved with 80 meshes, washed twice with ultrapure water, and dried at 60°C until constant weight.

[0067] (2) Put the corn stalks treated in step (1) in the reaction kettle, add dissolved H 2 SO 4 The solvent is tetrahydrofuran-water (tetrahydrofuran: water is 60:40, v / v) acid solution, then put it still in the blast drying oven, after hydrothermal treatment at 150°C for 80min, filter to obtain the treatment solution, the H 2 SO 4 The concentration in acid solution is 0.08mol / L.

[0068] (3) The obtained treatment solution was centrifuged at 12000 rpm for 10 min, and the obtained precipitate was cellulose crystals.

[0069] (4) Add 40 times the volume of ultrapure water to the supernatant, centrifuge at 12,000 rpm for 10 minutes, and the resulting precipitate is lignin nanoparticles.

[0070] (5) Put the supernatant obtained by centrifugation into a 1000 Da dialysis bag, and dialyze for 12 hours, and the solution in the obtaine...

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Abstract

The invention discloses a method for synchronously preparing multiple biomass materials. The method specifically comprises the following steps: adding waste biomass into an acid solution, carrying outhydrothermal treatment, and carrying out solid-liquid separation to obtain a treatment solution; and carrying out centrifugal separation on the treatment solution to obtain lower-layer precipitate and a supernatant, adding an anti-solvent into the supernatant, carrying out centrifugal separation to obtain precipitate, ie., lignin nanoparticles, and dialyzing the obtained supernatant to obtain a carbon quantum dot solution, wherein the lower-layer precipitate is a cellulose crystal. According to the method of the invention, multiple biomass materials including cellulose crystals (-400 nm), lignin nanoparticles (-100 nm) and carbon quantum dots (2-5 nm) can be rapidly and synchronously prepared from waste biomass so as to substantially improve the universality of the traditional nanometer material preparation method; and the preparation method is rapid, simple, easy for industrial production and low in cost.

Description

technical field [0001] The invention belongs to the field of biomass nanomaterial chemistry, and in particular relates to a method for synchronously preparing multiple biomass materials. Background technique [0002] Functional carbon-based materials hold the key to solving environmental and energy crises due to their unique tunable properties (e.g., thermal and electrical conductivity, high mechanical strength, and optical properties). At this stage, the growing industrial demand stimulates the research on non-toxic, low-cost and environment-friendly preparation methods. As an effective component of agricultural and forestry waste, lignocellulose is the most abundant and cheapest renewable resource on earth, and its biocompatibility and biodegradability make it useful in transformative technological fields including biomedical devices, electronics and energy. It has great application potential. Therefore, nanobiomaterials prepared from lignocellulose are becoming an attra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08H7/00C08B15/02D21C5/00
CPCC08B15/02C08H6/00D21C5/00
Inventor 石岩司梦莹卓胜男刘明人颜旭柴立元杨志辉
Owner CENT SOUTH UNIV
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