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Preparation method of nanometer fibril enteromorpha cellulose

A technology of nanofibrillation and cellulose, which is applied in fiber raw material processing, textiles and papermaking, etc., to achieve high conversion rate, low density, and increase the effect of tensile strength and elastic modulus

Active Publication Date: 2013-08-21
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the raw materials of Enteromorpha enteromorpha have not been efficiently utilized after the polysaccharides are extracted

Method used

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  • Preparation method of nanometer fibril enteromorpha cellulose
  • Preparation method of nanometer fibril enteromorpha cellulose

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Experimental program
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Embodiment 1

[0029] Embodiment 1: a kind of preparation method of enteromorpha nanofibril cellulose, specifically finish according to the following steps:

[0030] 1. After collecting Enteromorpha, sort and remove miscellaneous algae and other small shellfish, wash, freeze-dry, crush and sieve to obtain 60 mesh Enteromorpha algae dregs powder;

[0031] 2. Mix 5 g of Enteromorpha algal residue powder with 300 mL of distilled water, perform cell crushing pretreatment with an ultrasonic power of 500 W for 20 minutes, and extract polysaccharides in a constant temperature water bath at 65°C for 4 hours;

[0032] 3. Centrifuge the obtained polysaccharide-extracted mixed solution at 3500 rpm for 5 minutes, pour off two-thirds of the liquid, then add distilled water and repeat the above centrifugal cleaning for 5 times to obtain the precipitated waste residue after extracting the crude polysaccharide;

[0033] 4. Add KOH aqueous solution to the precipitated waste residue obtained after extracting ...

Embodiment 2

[0041] Embodiment 2: a kind of preparation method of enteromorpha nanofibril cellulose, specifically finish according to the following steps:

[0042] 1. After collecting Enteromorpha, pick and remove miscellaneous algae and other small shellfish, wash, freeze-dry, crush and sieve to obtain 100 mesh Enteromorpha algae dregs powder;

[0043] 2. Mix 3 g of Enteromorpha algal residue powder with 300 mL of distilled water, perform cell crushing pretreatment with an ultrasonic power of 1000 W for 20 minutes, and extract polysaccharides in a constant temperature water bath at 90°C for 2 hours;

[0044] 3. Centrifuge the obtained mixed solution of polysaccharide extracted at 5500 rpm for 5 minutes, pour off 2 / 3 of the liquid, then add distilled water and repeat the above centrifugal cleaning 5 times to obtain the precipitated waste residue of extracted crude polysaccharide;

[0045] 4. Add NaOH aqueous solution to the precipitated waste residue after extracting the crude polysacchari...

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Abstract

The invention discloses a preparation method of nanometer fibril enteromorpha cellulose. By taking marine biomass enteromorpha as a raw material, waste residue after polysaccharide extraction is subjected to a chemical treatment, and is then subjected to a nanometer fibril treatment after desalination, deproteinization and depigmentation, thus preparing enteromorpha algae nanometer fibril. The enteromorpha cellulose nanometer fibril prepared by the preparation method is long and uniform in fiber diameter distribution. The prepared cellulose nanometer fibril can have great application prospects in biological scaffolds, inorganic templates, optical transparent flexible films, drug controlled release, water purification, efficient heat insulation and sound insulation materials, rechargeable batteries, super-capacitors, catalysts and carriers, gas filtering materials, adsorption materials, cosmetics, food additives and the like.

Description

technical field [0001] The invention relates to a preparation method of nano-fibrillated enteromorpha cellulose, in particular to a method for successfully preparing nano-fibrillated cellulose from the large seaweed enteromorpha that causes the "green tide" at sea. Background technique [0002] The algae of Enteromorpha are composed of a single layer of cells, which are tubular, hollow or flat, and the length of the algae can reach more than 1m. The crude fiber content in the raw materials of Enteromorpha is 9-12%, while the cellulose content in the waste residue after extracting polysaccharides is as high as 30-50%, which is much higher than that of most natural wood, and the waste residue of Enteromorpha is rich in wood Cellulose has a low crystallinity and is an ideal precursor of nanofibrillated cellulose. However, most of the raw materials of Enteromorpha enteromorpha have not been efficiently utilized after the polysaccharides are extracted. Therefore, there is an ur...

Claims

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Application Information

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IPC IPC(8): D21C5/00C08B37/00
Inventor 杨东江佘希林李建江
Owner QINGDAO UNIV
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