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Cellulose stripping and functionalization method thereof

A functionalized and cellulose technology, applied in the field of biomass resource utilization and transformation, can solve the problems of complex process method and huge water treatment cost, and achieve the effects of simple preparation steps, short ultrasonic peeling time and extremely high consumption.

Active Publication Date: 2020-12-18
江西省钒电新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the technical route of the above method is mature, there are disadvantages such as complicated process methods and high cost of water treatment.

Method used

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  • Cellulose stripping and functionalization method thereof
  • Cellulose stripping and functionalization method thereof
  • Cellulose stripping and functionalization method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the mixed solvent of triethanolamine and tetramethylpiperidine nitrogen oxide with a volume ratio of 1:1, add a mixture of disodium edetate and 200-mesh sieved betel nut residue with a mass ratio of 2:1, mix The mass ratio of solvent to mixture is 2:1, and the initial concentration of betel nut residue is 30 mg mL -1 , 40KHz, 480W ultrasonic stripping for 2 hours, 5000 rpm, 45 min centrifugation, remove the unpeeled betel nut residue, collect the suspension to obtain the functionalized cellulose dispersion. A linear fiber with a diameter of about 5-10 μm ( figure 1 ), at 3333 cm -1 Occurrence of hydroxyl and functionalized amine groups at 1239 cm -1 The C-O vibration of hemicellulose weakens at 1036 cm -1 C-O vibration enhancement of cellulose at image 3 ), indicating that high-purity functionalized cellulose was obtained from betel nut residue.

Embodiment 2

[0026] In the mixed solvent of phosphoric acid and tetramethylpiperidine nitrogen oxide in a volume ratio of 1:1, add the mixture of sodium tartrate and 200 mesh sieved betel nut residue with a mass ratio of 2:1, the mass ratio of the mixed solvent to the mixture 2:1, the initial concentration of betel nut dregs is 30 mg mL -1 , 40KHz, 480W ultrasonic stripping for 2.5 hours, 5000 rpm, 45 min centrifugation to remove unpeeled betel nut residue, and collect the suspension to obtain the functionalized cellulose dispersion. The relevant performance parameters are shown in Table 1.

Embodiment 3

[0028] In the mixed solvent of nitric acid and tetramethylpiperidine nitrogen oxide in a volume ratio of 1:1, add the mixture of potassium sodium tartrate and 200 mesh sieved betel nut residue with a mass ratio of 2:1, the mass of the mixed solvent and the mixture The ratio is 2:1, the initial concentration of betel nut residue is 30 mg mL -1 , 40KHz, 480W ultrasonic stripping for 2 hours, 5000 rpm, 45 min centrifugation, remove the unpeeled betel nut residue, collect the suspension to obtain the functionalized cellulose dispersion. The relevant performance parameters are shown in Table 1.

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Abstract

The invention discloses a cellulose stripping and functionalization method thereof, and belongs to the technical field of biomass resource utilization and conversion. The method comprises the following steps: carrying out ultrasonic treatment on a biomass material in an organic salt solvent containing alkali metal, carrying out centrifugal treatment on the mixture subjected to ultrasonic stripping, removing the unstripped substrate, and collecting the suspension to obtain the functionalized cellulose dispersion liquid. According to the invention, the alkali metal-containing organic salt has abroad-effect and obvious auxiliary enhancement effect on cellulose stripping of a plurality of solvents (including high-boiling-point and low-boiling-point solvents), and can be used for in-situ preparation of cellulose dispersions under different solvent systems; therefore, the organic salt consumption is extremely low, repeated use can be achieved, the ultrasonic stripping time is short, energyconsumption is low, and the preparation steps are simple. The prepared cellulose is rich in functional groups such as amino and hydroxyl, and the obtained cellulose dispersion liquid is quite stable.

Description

technical field [0001] The invention belongs to the technical field of utilization and conversion of biomass resources, and specifically relates to a method for extracting and functionalizing cellulose. Background technique [0002] Represented by cellulose in crop straw and forestry residues, the key reason for its low degree of resource utilization and commercialization lies in the lack of extraction and post-processing technology, which limits the use of cellulose in the fields of energy, polymers, and composite functional materials. Applications. [0003] So far, the methods for cellulose extraction and subsequent functional modification are relatively uniform. Usually, the basic process is delignification in acidic sodium chlorite after organic solvent extraction, and then hydrolysis in alkaline solution to remove hemicellulose to obtain cellulose products. Although the technical route of the above-mentioned method is mature, there are disadvantages such as complicate...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/30D21C3/20
CPCD21B1/303D21C3/20
Inventor 曾宪祥陈梦洁吴雄伟刘锦莹熊利斌王恩多
Owner 江西省钒电新能源有限公司
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