Method for preparing natural cellulose containing zein mixture by using alcoholic solvent

A technology of zein and natural cellulose, which is applied in the field of mixture of natural cellulose and zein, can solve the problems of poor degradation performance, difficult film formation, and more cellulose, etc., and achieves enhanced mechanical properties and improved brightness. , the effect of simple operation

Active Publication Date: 2014-06-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And this technology thinks, when the weight ratio of zein and cellulose is higher than 5:5, it is difficult to form a film, even if the weight ratio of zein and cellulose is 5:5, it is already difficult to form a film; the film prepared by CN101168602A It has good thermal stability, mechanical properties, and biocompatibility, and there is a relatively stable hydrogen bond between the two mixtures, but due to its high cellulose content, its degradation performance is poor, and it is difficult to apply in the field of medicine

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Step 1: Measure 8ml of absolute ethanol with a measuring cylinder, pour it into a 100ml beaker, then measure 2ml of high-purity water into the beaker, and stir evenly. Weighed 0.8g Zein and poured it into the beaker, and dissolved it at room temperature at a stirring speed of 400r / min to prepare a homogeneous solution A.

[0030] Step 2: Use a balance to measure 4.5g NaOH, then weigh 6g urea, put the two into the same beaker, then measure 39.5ml of high-purity water and pour it into the beaker, stir and dissolve until the solution is clear without any particles. Then put the beaker into the refrigerator, cool down to -13°C, and take it out. Weigh 0.8g Cellulose, pour it into the beaker, stir and dissolve at a speed of 400r / min, until a clear and uniform solution B is obtained.

[0031] Step 3: At a stirring speed of 400r / min, pour the homogeneous solution A into the homogeneous solution B at a dropping speed of 10ml / min to obtain a uniform gel system with good thermal ...

Embodiment 2

[0034] Step 1: Use a measuring cylinder to measure 22.5ml of absolute ethanol, pour it into a 100ml beaker, then measure 2.5ml of high-purity water into the beaker, and stir evenly. Weigh 1.0 g of Zein and pour it into the beaker, and dissolve it at room temperature at a stirring speed of 600 r / min to obtain a homogeneous solution A.

[0035] Step 2: Use a balance to measure 3.5g of NaOH, then weigh 6g of urea, put the two into the same beaker, then measure 40.5ml of high-purity water into the beaker, stir and dissolve until the solution is clear, and no particles exist. Then put the beaker into the refrigerator, cool down to -12°C, and take it out. Weigh 0.6g Cellulose, pour it into the beaker, stir and dissolve at a speed of 600r / min, until a relatively clear homogeneous solution B is obtained.

[0036] Step 3: At a stirring speed of 600r / min, pour the homogeneous solution A into the homogeneous solution B at 25ml / min, and a uniform, stable and viscous solution system will ...

Embodiment 3

[0039] Step 1: Measure 24.5ml of absolute ethanol with a measuring cylinder, pour it into a 100ml beaker, then measure 10.5ml of high-purity water into the beaker, and stir evenly. Weigh 1.0 g of Zein and pour it into the beaker, and dissolve it at room temperature at a stirring speed of 800 r / min to obtain a homogeneous solution A.

[0040] Step 2: Use a balance to measure 4.5g NaOH, then weigh 6g urea, put the two into the same beaker, then measure 39.5ml of high-purity water and pour it into the beaker, stir and dissolve until the solution is clear without any particles. Then put the beaker into the refrigerator, cool down to -13°C, and take it out. Weigh 0.4g Cellulose, pour it into the beaker, stir and dissolve at a speed of 800r / min, until a relatively clear and homogeneous solution B is obtained.

[0041] Step 3: At a stirring speed of 800r / min, pour the homogeneous solution A into the homogeneous solution B at 35ml / min to obtain a homogeneous, relatively stable, and l...

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PUM

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Abstract

The invention discloses a method for preparing a natural cellulose containing zein mixture by using an alcoholic solvent. The method comprises the steps: firstly, at room temperature, adding Zein into an alcoholic aqueous liquid, and stirring to dissolve, so as to prepare a uniform liquid A, of which the mass percent of Zein is 2-15wt%; putting Cellulose into an aqueous liquid, which contains 6-8% of NaOH and 10-14wt% of Urea, at the temperature of -12 to -13 DEG C, and dissolving, so as to prepare a uniform liquid B, of which the mass percent of Cellulose is 0.2-8wt%; and adding the uniform liquid A into the liquid B in a manner of controlling the dry weight ratio of Zein and Cellulose to (10:1) to (2:1) and controlling Zein and Cellulose to account for 1.5-5% of the mass of a mixed liquid, and mixing to dissolve, thereby obtaining a uniform and stable mixed liquid or gel. The mixed liquid or gel can be applied to the industries, such as pharmacy and food, in a manner of being prepared into films.

Description

technical field [0001] The invention relates to a natural cellulose and zein mixture, in particular to a method for preparing the natural cellulose-containing zein mixture by using an alcohol solvent. Background technique [0002] Zein is a kind of protein, which is a by-product of corn processing industry. The molecular weight of Zein is generally between 25,000 and 45,000. It is rich in glutamic acid (21-26%), leucine (20%), proline (10%), alanine (10%), and lacks some Basic and acidic amino acids, such as lysine, aspartic acid, and tryptophan, cannot guarantee nitrogen balance when supplied as food, and the presence of a high proportion of non-polar amino acids and the absence of basic and acidic amino acids affect its solubility properties There are also implications. At the same time, Zein also contains more sulfur-containing amino acids, so Zein needs to be soluble in aqueous alcohol solutions at a certain pH value, and Zein will precipitate in low-concentration salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/09C08L89/00C08L1/02C08J5/18
Inventor 江燕斌魏东伟刘贵金霍伟智
Owner SOUTH CHINA UNIV OF TECH
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