Beet pulp cellulose nanofibril and preparation method thereof

A technology of beet pulp and cellulose, applied in the post-processing of cellulose pulp, fiber raw materials, fiber raw material processing and other directions, can solve the problems of high cost, complex chemical pretreatment process, environmental pollution, etc. Component separation and structural changes, the effect of a simple disassembly process

Active Publication Date: 2016-11-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of TEMPO oxidation is high, the chemical pretreatment process is relatively complicated, and there is also the problem of waste liquid treatment, which is easy to cause environmental pollution

Method used

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  • Beet pulp cellulose nanofibril and preparation method thereof
  • Beet pulp cellulose nanofibril and preparation method thereof
  • Beet pulp cellulose nanofibril and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A method for preparing sugar beet pulp cellulose nanofibers in this embodiment comprises the following steps:

[0054] (1) Pretreatment of sugar beet meal

[0055] Wash the sugar beet granules with cold water, dry at 50°C, pulverize, pass through 100-mesh and 200-mesh sieves, collect materials between 100 mesh and 200 mesh to obtain sugar beet meal powder, and seal and store for later use.

[0056] (2) Steam explosion pretreatment

[0057] Measure 500mL of deionized water, add it to the steam explosion reaction tank, weigh 30g of beet meal powder, wrap it with copper mesh and put it on a tripod, then put it in the explosion reaction tank, and assemble the steam explosion reaction tank After sealing, heat at 220°C for 35 minutes, then open the valve, depressurize instantaneously for blasting, collect the blasted material and centrifuge (10000rmp, 10min) and then suction filter, dry the obtained filter residue at 50°C, and set aside, the filtrate Set aside, repeat the a...

Embodiment 2

[0068] A method for preparing sugar beet pulp cellulose nanofibers in this embodiment comprises the following steps:

[0069] (1) Pretreatment of sugar beet meal

[0070] Wash the sugar beet granules with cold water, dry them at 50°C, crush them, pass through 100-mesh and 200-mesh sieves, collect materials between 100 mesh and 200 mesh, and obtain sugar beet meal powder, which is sealed and stored for later use;

[0071] (2) Steam explosion pretreatment

[0072] Measure 500mL of deionized water, add it to the steam explosion reaction tank, weigh 40g of beet meal powder, wrap it with copper mesh and put it on a tripod, then put it in the explosion reaction tank, and assemble the steam explosion reaction tank After sealing, heat at 220°C for 35 minutes, then open the valve, depressurize instantaneously for blasting, collect the blasted material and centrifuge (10000rmp, 10min) and then suction filter, dry the obtained filter residue at 50°C, and set aside, the filtrate Set asi...

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Abstract

The invention relates to beet pulp cellulose nanofibril, pectin and a preparation method thereof. The preparation method comprises the following steps: beet pulp is used as a raw material, and pretreatment with steam explosion is carried out for removing pectin substances and hemicellulose in cell walls; bleaching with hydrogen peroxide or high shear homogenizing treatment is carried out for removing lignin and other impurities; and finally high speed stirring treatment and high strength ultrasonic treatment are used for preparing the cellulose nanofibril. The preparation method has the advantages of cleaning, high efficiency, simple technology, and few chemical reagents without waste liquid treatment and other problems. Explosion liquid after pretreatment with ethanol precipitation is used for recovery of pectin substances, so that multipurpose utilization rate of the beet pulp is improved, and added value of the product is increased. The beet pulp cellulose nanofibril is a typical cellulose I type crystal structure whose diameter is 10-50nm, and length is at least more than 1[mu]m.

Description

technical field [0001] The invention relates to the field of nanocellulose, in particular to a sugar beet meal cellulose nanofiber and a preparation method thereof. Background technique [0002] The high-value utilization of biomass resources is mainly reflected in two aspects, the research of high-efficiency biomass energy and high-performance biomass materials. Among them, nanocellulose, as a new type of biomass nanomaterial, has attracted extensive attention from the scientific community. The nano-size effect and strong porous network structure of cellulose nanofibers endow them with high mechanical strength and excellent optical properties, so many high value-added products can be prepared. Current research mainly focuses on exploring new material sources, developing new preparation methods, and functionalizing cellulose nanofibers. [0003] Sugar beet meal, as the waste residue of industrial sugar production, has the characteristics of abundant sources, low cost and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21B1/36D21B1/00D21C9/16C08B37/06
CPCC08B37/0045D21B1/00D21B1/36D21C5/00D21C9/163
Inventor 冯彦洪周玉娇程天宇
Owner SOUTH CHINA UNIV OF TECH
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