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Method for preparing lignin nanotube by utilizing agriculture and forestry biomass raw materials

A biomass raw material, lignin technology, applied in the field of lignin nanotubes, can solve problems such as environmental pollution, complicated operation process, etc., and achieve the effects of simple and easy method, improved environmental performance, and easy operation.

Active Publication Date: 2021-10-22
SOUTHWEST JIAOTONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a method for preparing lignin nanotubes by utilizing agricultural and forestry biomass raw materials, which can effectively solve the problems of complicated operation process and environmental pollution existing in the existing methods

Method used

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  • Method for preparing lignin nanotube by utilizing agriculture and forestry biomass raw materials

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Embodiment 1

[0030] A method for preparing lignin nanotubes from agricultural and forestry biomass raw materials, comprising the following steps:

[0031] (1) Disperse 100g of pulverized wheat straw in a sodium hydroxide solution with a mass concentration of 0.4%. The mass concentration of the biomass raw material in the sodium hydroxide solution is 1%. After adding tetrahydrofuran thereto, carry out ball milling, and the sodium hydroxide solution The volume ratio to tetrahydrofuran is 100:5, the ball milling speed is 600rpm, the ball milling time is 10h, and then centrifuged at 10000rpm for 5min to collect the supernatant;

[0032] (2) To the supernatant of step (1), dropwise add hydrochloric acid with a mass concentration of 0.4% at a rate of 200 μL / min until the solution is neutral, and then use a semipermeable membrane to perform dialysis for 48 hours to obtain lignin-containing nanoparticles. tube of solution.

Embodiment 2

[0034] A method for preparing lignin nanotubes from agricultural and forestry biomass raw materials, comprising the following steps:

[0035] (1) 100g of pulverized wheat straw material is dispersed in a sodium hydroxide solution with a mass concentration of 2%. The mass concentration of the biomass raw material in the sodium hydroxide solution is 3%, and polyethylene glycol with a molecular weight of 4000 is added thereto. Carry out ball milling afterward, the volume ratio of sodium hydroxide solution and polyethylene glycol is 100:10, and ball milling speed is 300rpm, and ball milling time is 8h, centrifuges 7min under the condition of 12000rpm then, collects supernatant;

[0036] (2) To the supernatant of step (1), dropwise add hydrochloric acid with a mass concentration of 0.4% at a rate of 500 μL / min until the solution is neutral, and then use a semipermeable membrane to perform dialysis for 24 hours to obtain lignin-containing nanoparticles. tube of solution.

Embodiment 3

[0038] A method for preparing lignin nanotubes from agricultural and forestry biomass raw materials, comprising the following steps:

[0039] (1) Dispersing 100g of pulverized corn stalks in a potassium hydroxide solution with a mass concentration of 3%, the biomass raw material in a potassium hydroxide solution with a mass concentration of 6%, adding dimethyl sulfoxide to it and then performing ball milling, The volume ratio of potassium hydroxide solution to dimethyl sulfoxide is 100:10, the ball milling speed is 500rpm, the ball milling time is 8h, then centrifuged at 12000rpm for 6min, and the supernatant is collected;

[0040] (2) To the supernatant of step (1), dropwise add hydrochloric acid with a mass concentration of 0.7% at a rate of 400 μL / min until the solution is neutral, and then use a semi-permeable membrane to perform dialysis for 3 hours to obtain lignin-containing nanoparticles. tube of solution.

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Abstract

The invention provides a method for preparing a lignin nanotube by utilizing an agriculture and forestry biomass raw materials. The method comprises the following steps: dispersing crushed biomass raw materials in an inorganic alkaline solution, adding a cosolvent into the solution, performing ball milling, then performing centrifuging, and collecting supernate; and dropwise adding inorganic acid into the supernate until the solution is neutral, and performing dialyzing by using a semipermeable membrane to obtain a solution containing the lignin nanotube. The method can effectively solve the problems of complex operation process and environmental pollution in existing methods.

Description

technical field [0001] The invention belongs to the technical field of lignin nanotubes, and in particular relates to a method for preparing lignin nanotubes from agricultural and forestry biomass raw materials. Background technique [0002] The tubular structure has many advantages, such as a large specific surface area, which can block and dissipate sound waves and heat; the tubular structure has many applications in social life, such as adsorption, sound insulation, protection, etc., and a variety of materials are used to synthesize The product with a tubular structure makes the obtained material have the largest specific surface area under the same volume, which brings quite excellent macroscopic properties. [0003] Lignin is the only renewable natural aromatic polymer in nature. It has a wide range of sources and accounts for 15-30% of various agricultural and forestry biomass resources. In addition, the pulp and paper industry also produces a large amount of lignin M...

Claims

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Application Information

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IPC IPC(8): C08H7/00B82Y40/00
CPCC08H6/00B82Y40/00Y02P20/54
Inventor 姜曼胡翔洲王峰陆远潘宇
Owner SOUTHWEST JIAOTONG UNIV
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