Biological cellulose membrane manufacturing method

A biocellulose, manufacturing method technology, applied in microorganism-based methods, biochemical equipment and methods, microorganisms, etc., can solve the problems of biocellulose film embrittlement, secondary waste environment, and reduced tensile strength, etc. To achieve the effect of reducing toxicity, reducing production costs and improving safety

Active Publication Date: 2014-04-16
百岳特美肤生物技术(上海)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The prior art method for producing biological cellulose membranes, such as disclosed in U.S. Patent No. 8,053,216, is to ferment and culture microorganisms that can produce bacterial cellulose (BC) under appropriate conditions to obtain bacterial cellulose containing bacterial cellulose Raw materials, the bacterial cellulose raw material is rinsed with an alkaline solution, then neutralized and washed with an acidic solution, so that the pH value of the bacterial cellulose becomes neutral to form a biological cellulose film; the above-mentioned method for manufacturing a biological cellulose film It is necessary to use a large amount of alkaline and/or acidic solution to treat the bacterial cellulose separately, which is likely to generate secondary waste and cause unnecessary damage

Method used

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  • Biological cellulose membrane manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1. prepare bacterial cellulose

[0029] Acetobacter sp. is placed in a colloidal culture solution with a pH value between 0.5 and 6, wherein the colloidal culture solution is at least one selected from animal glue, acacia gum, agaric gum or natto A group composed of colloidal culture fluid such as glue; and the culture fluid containing the acetic acid bacteria is filled into a stackable container and sealed; after the fermentation of the acetic acid bacteria that can produce bacterial cellulose is completed, it can be formed on the surface of the colloidal culture fluid Film-like bacterial cellulose in water; the bacterial cellulose is mainly composed of β-1,4 polyglucose (β-1,4glucan); and the thickness of the film-like bacterial cellulose is between 0.2mm (Km centimeters) to 5mm.

Embodiment 2

[0030] Embodiment 2. swelling condition test

[0031] As shown in Table 1 below, place the bacterial cellulose obtained in Example 1 in a water-containing environment with a temperature of 100°C to 140°C and a pressure of 1.2kg / cm 2 (kg / cm²) to 1.5kg / cm 2 In the airtight container of each, respectively through 25 minutes to 75 minutes, to obtain the swollen bacterial cellulose of sample 1 to sample 5 respectively. Among them, the bacterial cellulose of sample 3 has better water retention after 30 minutes at 121° C., and the water retention is 150 to 200 times the dry weight.

[0032] Table 1 swelling condition test

[0033]

Embodiment 3

[0034] Embodiment 3. Bleaching condition test

[0035]As shown in Table 2 below, each swollen bacterial cellulose obtained in Example 2 is placed in a solution containing 0.27wt% (weight percent) citric acid and 0.20wt% chlorine dioxide, and the temperature is between 100°C and In a container at 140° C., wash with citric acid solution for 25 minutes to 90 minutes, and then wash with water for 30 minutes to obtain a biocellulose film. And measure the degree of bleaching of each sample with Kent-Jones and Martin color grader (Kent-Jones and Martin color grader) at a wavelength of 530nm (nanometer), wherein the degree of bleaching of the biological cellulose film of sample 3 is between -2 to -3, equivalent to general bleaching effect, and the pH value (pH value) of the biological cellulose film is between 6.8 and 7.2.

[0036] Table 2 Bleaching condition test

[0037]

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Abstract

The invention provides a biological cellulose membrane manufacturing method, comprising the steps of: preparing bacterial celluloses which is obtained through fermentation culturing of microbes capable of generating bacterial celluloses; placing the bacterial celluloses in an enclosed space containing water and having a temperature from 100 DEG to 140 DEG and a pressure from 1.2 kg/cm2 to 1.5 kg/cm2 for 25-75 minutes to obtain expanded bacterial celluloses; successively placing the expanded bacterial celluloses in an acid solution and water for cleaning to be neutral to obtain a biological cellulose membrane. The method can shorten manufacturing time; in addition, the expanded bacterial celluloses can increase the area of the bacterial celluloses to reduce cost.

Description

technical field [0001] The invention provides a method for producing a biological cellulose film, especially a method for producing a biological cellulose film that does not need to be cleaned with a large amount of alkali and / or acid solution and can shorten the manufacturing process. Background technique [0002] Bacterial cellulose (BC) is produced by the synthesis of microorganisms that can produce bacterial cellulose, and the bacterial cellulose raw material obtained by fermentation of microorganisms that can produce bacterial cellulose can be obtained after proper treatment. Biocellulose membranes with high hydrophilicity, high mechanical strength and extremely high biocompatibility (biocompatibility) make biocellulose membranes widely used in various fields, such as filtration membranes in the industrial field, dietary fiber in the food industry and Artificial skin, artificial blood vessels, etc. in the biomedical field. [0003] The prior art method for producing bi...

Claims

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Application Information

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IPC IPC(8): C08J7/14C08J7/12C08L5/02C12P19/04C12R1/02
Inventor 林咏翔陈鴻霖
Owner 百岳特美肤生物技术(上海)有限公司
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