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Method for preparing a cellulose nanofiber stabilized colloidal emulsion

A technology of cellulose and nanofibers, applied in the field of emulsion preparation, can solve problems such as poor palatability and waste of resources, and achieve good biodegradability, increased stability, and mild preparation conditions

Active Publication Date: 2020-01-17
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lentinus edodes has the function of decomposing lignin, and its main edible part is the mushroom part, while the stalk of lentinus edodes is often discarded during processing due to its high cellulose content and poor palatability, and becomes industrial waste, causing a huge waste of resources
To the best of our knowledge, the preparation of colloidal emulsions at the meso-internal phase level has not been reported

Method used

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  • Method for preparing a cellulose nanofiber stabilized colloidal emulsion
  • Method for preparing a cellulose nanofiber stabilized colloidal emulsion
  • Method for preparing a cellulose nanofiber stabilized colloidal emulsion

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preparation example Construction

[0043] The invention provides a method for preparing a colloidal emulsion with stable CNFs of Lentinus edodes, comprising the steps of:

[0044] S1. Extract NC: Puree the shiitake stalk powder into shiitake stalk powder; take the shiitake stalk powder and add 5-200 times its weight of 300mg / mL sodium hydroxide solution, keep it for 1-10h after boiling, and filter through a 20-180 mesh sieve Obtain crude cellulose; take the crude cellulose and add 5 to 50 times its volume of 9.97mol / L hydrogen peroxide solution, stir in a stirrer at 1000rpm for 1 hour at 30 to 70°C, and transfer to 25°C Continue to stir at 1000rpm for 1-24h, and the resulting mixture is washed with deionized water to pH 7.0-7.9 after passing through a 20-180 mesh sieve to obtain NC; the NC is in the form of fibers.

[0045] S2. Preparation of Lentinus stipe CNFs: Homogenize the Lentinus cellulose described in step S1 under high pressure of 10-90 MPa for 2-20 times to obtain CNFs; dissolve the CNFs in water to p...

Embodiment 1

[0049] S1, extraction of shiitake cellulose (NC): crush dry shiitake stalks with a moisture content of less than 13g / 100g (national food safety standard edible fungi and their products GB7096-2014) and filter through a 180-mesh sieve to obtain 50g of shiitake stalk powder, add 250g of 300mg / mL sodium hydroxide solution was boiled for 1h, and the resulting mixture was filtered through a 20-mesh sieve to obtain crude cellulose, and then 40g of the obtained crude cellulose was added to 200g of 9.97mol / L hydrogen peroxide solution for bleaching. The bleaching process is to stir in a stirrer at 1000rpm for 1h at 30°C, and continue to stir at 1000rpm for 1h at 25°C. The resulting mixture is filtered with a 20-mesh sieve to take the precipitate A, and the precipitate A is washed with deionized water until pH7.9, centrifuge at 1000rpm for 60min to take the precipitate B, and obtain the mushroom cellulose (NC);

[0050] S2. Preparation of cellulose nanofibers (CNFs) with shiitake stipe...

Embodiment 2

[0053] S1, extracting mushroom cellulose (NC): after crushing dried mushroom stalks with a moisture content of less than 13g / 100g (food safety national standard edible fungi and their products GB7096-2014), filter through a 100-mesh sieve to obtain 50g of mushroom stalk powder, add 5000g of 300mg / mL sodium hydroxide solution was boiled for 10h, and the resulting mixture was filtered through a 180-mesh sieve to obtain crude cellulose, and then 40g of the obtained crude cellulose was added to 200g of 9.97mol / L hydrogen peroxide solution, at 60°C Stir in a stirrer at 1000rpm for 1h, transfer to 25°C and continue stirring at 1000rpm for 24h, filter the resulting mixture through a 180-mesh sieve and take the precipitate A, wash the precipitate A with deionized water to pH7.9, 5000rpm Centrifuge for 30 minutes to take the precipitate B, and obtain the mushroom cellulose (NC);

[0054] S2. Preparation of cellulose nanofibers (CNFs) with shiitake stipe: take the shiitake cellulose des...

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Abstract

The invention discloses a method for preparing a cellulose nanofiber stabilized colloidal emulsion. The method comprises the following steps: by taking lentinus edodes stalk powder as a raw material,extracting cellulose; dissolving the cellulose into water, and performing high-pressure homogenization so as to obtain a cellulose nanofiber solution; and adding plant oil into CNFs (carbon nanofibers) according to a weight ratio of 1:(1-3), performing homogenization for 2-20 times at 10-90MPa, so as to obtain a colloidal emulsion. By adopting the method, a stable colloidal medium and internal phase emulsion is prepared by using fungal sporocarp cellulose nanofibers for a first time, and the colloidal emulsion is obtained under an internal phase ratio of 50%. Raw materials used in the preparation method disclosed by the invention are all food-grade materials, so that the emulsion is rich in resource, has the advantages of being green and environment-friendly, renewable and low in cost, andmeanwhile has good biodegradability and biocompatibility, the colloidal medium and internal phase emulsion is mild in preparation condition and simple to operate, is free of phase separation after being stored for 30 days at 25 DEG C, and has great application values in fields such as foods, medicines and cosmetics.

Description

technical field [0001] The invention belongs to the technical field of emulsion preparation, and in particular relates to a method for preparing a colloidal internal phase emulsion stabilized by cellulose nanofibers. Background technique [0002] Colloidal emulsions have attracted the interest of many researchers because of their properties of both gels and emulsions, and are widely used in food, medicine, cosmetics, and 3D printing. The colloidal network structure in the colloidal emulsion can improve the stability and antioxidant activity of the emulsion, thereby inhibiting the oxidation of unsaturated fatty acids in the emulsion, which makes the colloidal emulsion play an important role in the drug delivery system. Current studies have confirmed that particles such as whey protein, soybean protein, porcine plasma protein, and zein can stabilize the oil-water interface in colloidal emulsions and form uniform colloidal emulsions. However, most of these particles are chemic...

Claims

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Application Information

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IPC IPC(8): C08J3/09C08L1/02
CPCC08J3/091C08J2301/02
Inventor 徐献兵李想宋亮秦磊杜明于翠平王震宇董亮吴超白长军
Owner DALIAN POLYTECHNIC UNIVERSITY
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