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A kind of natural high crystallinity plant cellulose and preparation method thereof

A plant cellulose, high crystallinity technology, applied in fiber raw material processing, pulping with acid salts/acid anhydrides, textiles and papermaking, etc. Effect

Active Publication Date: 2018-09-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All algae cells have the ability to divide, but usually only the cells at the top produce a large number of new cells, thus quickly forming a lush branch system in the water, destroying the ecological balance of the water environment

Method used

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  • A kind of natural high crystallinity plant cellulose and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Clean the green algae taken from freshwater lakes to remove impurities, air-dry them naturally, and grind them mechanically to obtain green algae powder. According to the solid-liquid ratio of 1:5 (w / w), the amount of sodium hypochlorite is 10% (w / w) of the green algae powder, and the green algae powder (5.0 g) and sodium hypochlorite (0.5 g) are placed in acetic acid with a pH of 4.0 - In sodium acetate buffer solution, the temperature is 40°C, and the reaction is continuously stirred for 3 h. After the reaction is finished, the green algae powder changes from green to milky white, washed to neutral, and solid-liquid separation. The separated solid residue is further placed in sodium hydroxide solution to remove protein, the solid-liquid ratio is 1:8 (w / w), the amount of sodium hydroxide is 10% (w / w) of the solid residue, the temperature is 50°C, Stirring was continued for 4 h. After the reaction, the reaction solution was washed to neutral, and the solid and liquid ...

Embodiment 2

[0029] Clean the green algae raw material taken from the river, remove impurities, air-dry naturally, and mechanically grind to obtain the green algae powder. According to the solid-liquid ratio of 1:10 (w / w), the amount of sodium hypochlorite is 20% (w / w) of the green algae powder, and the green algae powder (4.0 g) and sodium hypochlorite (0.8 g) are placed in acetic acid with a pH of 4.5 - In sodium acetate buffer solution, the temperature is 55°C, and the reaction is continuously stirred for 4.5 h. After the reaction is finished, the green algae powder changes from green to milky white, washed to neutral, and solid-liquid separation. The separated solid residue is further placed in sodium hydroxide solution to remove protein, the solid-liquid ratio is 1:10 (w / w), the amount of sodium hydroxide is 25% (w / w) of the solid residue, and the temperature is 70°C. Stirring was continued for 6 h. After the reaction, the reaction solution was washed to neutral, and the solid and l...

Embodiment 3

[0031] Clean the green algae raw material taken from shallow sea waters, remove impurities, air-dry naturally, and grind mechanically to obtain green algae powder. According to the solid-to-liquid ratio of 1:20 (w / w), the amount of sodium hypochlorite is 40% (w / w) of the green algae powder, and the green algae powder (5.0 g) and sodium hypochlorite (2.0 g) are placed in acetic acid with a pH of 5.0 - In sodium acetate buffer solution, the temperature is 70°C, and the reaction is continuously stirred for 6 h. After the reaction is finished, the green algae powder changes from yellow-green to milky white, washed to neutral, and solid-liquid separation. The separated solid residue is further placed in sodium hydroxide solution to remove protein, the solid-liquid ratio is 1:12 (w / w), the amount of sodium hydroxide is 15% (w / w) of the solid residue, the temperature is 60°C, Stirring was continued for 5 h. After the reaction, the reaction solution was washed to neutral, and the so...

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Abstract

The invention discloses natural high-crystallinity-degree plant cellulose and a preparation method thereof. The method is one of effective paths of effectively developing and utilizing biomass algae resources. Concretely, collected algae raw materials are cleanly washed; impurities are removed; natural air drying is performed; mechanical crushing is performed. Under the acid condition, sodium hypochlorite is used for removing pigment components through oxidization; after the reaction is completed, the materials are washed to the neutral state; solid-liquid separation is performed; solid-residue is treated by basic sodium hydroxide so as to remove protein ingredients; after the reaction is completed, the materials are washed to the neutral state; solid-liquid separation is performed; dilute hydrochloric acid solution is continuously used for hydrolyzing inorganic salt ingredients such as calcium salt in the solid residues; after the reaction is completed, the materials are washed to the neutral state; drying is performed; the cellulose with high purity and high crystallinity degree is prepared. The high-purity high-crystallinity-degree cellulose with the micro-fine reticular interwoven microscopic structures is obtained through extraction from natural biomass; the technical support is provided for the development of the regeneration high-crystallinity-degree fiber materials.

Description

technical field [0001] The invention relates to the field of renewable biomass-based materials, in particular to a natural high-crystallinity plant cellulose and a preparation method thereof. Background technique [0002] Natural plant fibers usually consist of crystalline and non-crystalline regions. The microcrystals in the crystalline region are closely arranged, and the bonding force between them is large. Macroscopically, the fiber with high crystalline region has better performances such as wear resistance, strength and stiffness. Micro-nanofibers with high crystallinity also exhibit special optical properties in composite nanomaterials. In addition, a large number of hydroxyl groups on the surface of fibers with high crystallinity form a huge hydrogen bond network through hydrogen bonds, the hydrogen bond interaction with external water molecules is reduced, the moisture absorption performance is reduced, and the thermal stability is improved. Important raw material...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C3/04D21C5/00
CPCD21C3/04D21C5/00
Inventor 高文花曾劲松徐峻王斌田晓俊陈克复
Owner SOUTH CHINA UNIV OF TECH
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