KR100317476B1 - A method of removing pectin in bast fiber - Google Patents

Abstract

Provided are methods for refining bast fibers of tough plants.

This method is efficiently refined by letting the bacteria act on the tough skin to be treated while maintaining a temperature of 38 to 40 ° C. and a pH of 6.0 to 7.0 so that the aerobic bacterial liquid and the anaerobic bacterial liquid coexist.

Description

A method of removing pectin in bast fiber

The present invention relates to a method for refining bast fiber, and more particularly, to completely disintegrate and oxidize pectin in the membrane by refining the bast natural fiber of a tough plant with a mixed refining solution of aerobic and anaerobic bacterial mother solution. The present invention relates to a method for refining the soft fiber of a plant without loss of weight.

In general, when the soil and climatic conditions of Korea are suitable, hemp, hemp, flax, etc., which can be cultivated in farmhouses, and bast fibers such as vines, vines, mulberries, and sycamore, etc. These bast fibers have been steamed or steamed and stripped and treated with strong alkaline chemicals such as caustic soda.

However, this traditional method uses chemicals with strong properties, which impairs the uniqueness of the fiber and inadequate removal of impurities such as pectin, making it impossible to obtain high quality bast fibers and the environmental problems such as pollution due to harmful wastewater generation. There was also a problem.

Meanwhile, according to Korean Patent Publication No. 1986-1524 invented by the present inventors, a method for refining bast fibers using aerobic bacteria is disclosed, but this method is inherent to damage or pollution of fiber intrinsic properties compared to conventional methods using strong chemicals. It has the effect of solving the problem of pectin, but because it uses only aerobic bacteria, the pectin's degradability is excellent, but there is a defect that can not get great effect in removing impurities of bast fiber due to lack of corrosion flux, especially toughness such as jute, mulberry, etc. There were many problems in refining the fibers.

Furthermore, according to Korean Patent Publication No. 1991-4453, the method for refining the cortical natural fiber, the inventors invented corrosive elution of pectin in the fiber by anaerobic bacteria, and separated and acidified the aerobic bacteria to damage cellulose. Although a method of removing pectin is disclosed, this method is complicated because the process of treating the cultured mother liquor of anaerobic bacteria and that of the aerobic bacteria is sequentially performed at a time interval in the fibres to be treated. In addition, there was a problem such as a longer processing time.

It is an object of the present invention to provide a method for refining bast fiber of a tougher plant that has solved the problems of the conventional method as described above.

1 is a process schematic diagram schematically showing a refining method according to an embodiment of the present invention.

2 is a process schematic diagram schematically showing a refining method according to another embodiment of the present invention.

According to the first aspect of the present invention,

Detecting aerobic bacteria from the bast fibers of a tough plant and culturing them under conditions and nitrogen atmosphere suitable for breeding the bacteria to obtain aerobic bacterial fluids;

Detecting anaerobic bacteria from the bast fibers of a tough plant and culturing them under conditions suitable for the growth of the bacteria to obtain anaerobic bacterial fluids;

Preparing a refined mother liquor in which the aerobic and anaerobic bacterial liquids coexist by mixing the aerobic bacterial liquids and the anaerobic bacterial liquids obtained in the above steps and maintaining a temperature of 38 to 40 ° C. and a pH of 6.0 to 7.0 so that they can coexist; And

Injecting natural water into the refining furnace and immersing the tough raw material to be treated therein, and then refining the tough raw material by injecting a refining mother solution in which the aerobic and anaerobic bacteria obtained in the step are symbiotic; Provided is a method for refining bast fiber comprising a tough plant.

According to the second aspect of the present invention,

Detecting aerobic bacteria from the bast fibers of a tough plant and culturing them under conditions and nitrogen atmosphere suitable for breeding the bacteria to obtain aerobic bacterial fluids;

Detecting anaerobic bacteria from the bast fibers of a tough plant and culturing them under conditions suitable for the growth of the bacteria to obtain anaerobic bacterial fluids;

Preparing a refining mother liquor in which these aerobic anaerobic bacterial liquids symbiize by mixing the aerobic bacterial liquid and anaerobic bacterial liquids obtained in the above steps and maintaining a temperature of 38 to 40 ° C. and pH 6.0 to 7.0 so that they can coexist;

Inject the natural water into the refinery and immerse the tough raw material to be treated therein, and then maintain the 38-40 ° C temperature and inject the refined mother liquor in which the aerobic and anaerobic bacteria obtained in the above step are symbiotic for 45-55 hours. A first refining step of refining;

A second refining step of refining and washing the refining raw material having undergone the first refining step for 45 to 55 hours while maintaining an elevated temperature of 60 to 70 ° C in the refining mother liquor; And

The washed refining raw material is emulsified for 46 to 50 hours at a temperature of 60 ~ 70 ℃ and aging (aging) step; is provided a method for refining the bast fiber of tough fibers.

Hereinafter, the present invention will be described in detail.

In the present invention, when both aerobic and anaerobic bacteria are used to refine bast fibers of tough plants, the present invention can effectively remove pectin, an impurity that fixes cortex and fibers from bast fibers without loss of cellulose. When used in bast fibers, the process and reaction time are longer, resulting in lower productivity. However, these aerobic and anaerobic bacteria are mixed and symbiotic at specific pH, temperature and other air conditions where they can coexist. Thus, refining bast fiber not only simplifies the refining process but also improves the refining effect, and as a result of the research, the present invention has been completed.

According to the method of the present invention, aerobic and anaerobic bacteria which disperse and decompose fiber bundles by encroaching and decomposing carbon-carbon and other chemical substances attached as pectin impurities in the cortex and the fiber to which the cortex and fiber are fixed in the bast fiber of tough plants And aerobic bacteria and anaerobic bacteria were prepared, respectively, under the nitrogen atmosphere and suitable conditions for their reproduction, and the fiber bundles of tough plants were added to natural water in a refinery furnace, and the prepared aerobic bacteria and anaerobic were prepared. Bacterial fluid is introduced into the refining furnace and allowed to stand for 45 to 55 hours at a temperature of 38 to 40 ° C. and a pH of 6.0 to 7.0 so that the aerobic and anaerobic bacteria can coexist.

By the above process, the pectin adhered between the fiber and the film of the bast fiber is completely decomposed to disperse the fiber inside, and as a result, pure bast fiber can be obtained, which not only shortens the refining time but also damages the fiber. Without this, it is possible to mass produce excellent quality fibers at one time.

In the method of the present invention, the aerobic bacterial liquid and the anaerobic bacterial liquid may be prepared in advance, and these may be added to a refining furnace into which a fiber bundle of tough fibers is added, or the two liquids may be mixed in advance, and then the mixed liquid may be refined. It may be added to. In any case, it is preferable to maintain a temperature of 38 to 40 ° C. and a pH of 6.0 to 7.0 so that these two bacteria can coexist in a mixed state of aerobic and anaerobic bacterial liquids.

The refining time in the refining furnace is preferably 45 to 55 hours, preferably 48 to 50 hours.

The refining raw material that has undergone the refining process is further preferably subjected to a second refining step of treatment for 45 to 55 hours in a refining mother liquid at a temperature of 60 to 70 ° C. for a more thorough removal of impurities.

In addition, oxygen may be injected intermittently during refining, eg every 2 hours, to promote bacterial activation in the refining step (s).

The amount of oxygen to be injected and the injection time interval are not particularly limited and may be enough to activate the bacteria so as to effectively perform the refining.

After finishing the refining step, the refining raw material is optionally cleaned by adding a washing agent and a foaming agent that can be commonly used.

Washed refined hides are tanned to maintain optimal conditions, and may be used as yeast or palm oil. The tanned raw hides are aged for 46-50 hours at a temperature of 60-70 ° C.

Hereinafter, the method of the present invention will be described in detail with reference to the accompanying drawings.

First step; Aerobic and Anaerobic Bacteria Extraction and Culture Process

Detects and decomposes aerobic and anaerobic bacteria that are effective to disperse fibrous fluxes by encroaching and decomposing carbon and other chemicals as pectinic impurities in the coating that naturally intersect the cortical layer and fiber to tough plant bast fibers. Pure culture under nitrogen atmosphere yields pure aerobic and anaerobic bacterial fluids.

In other words, the anaerobic bacterium (Kurthia Cannabis) and the aerobic bacterium (Bacilius Cannabis) were cultured from dry skin under conditions suitable for propagation of these bacteria so as to be effective in eroding or degrading pectin that binds fibrillar cells. Do it.

Each culture condition for these bacteria may be a normal culture condition, for example, the temperature of 35 to 40 ℃ and pH 7.0 to 8.0 for aerobic bacteria is good, the temperature of 25 to 28 ℃ and pH5 for anaerobic bacteria. 0 to 6.0 may be sufficient.

Second Step: Preparation of Refined Mother Liquid

The aerobic bacterial liquid and the anaerobic bacterial liquid obtained in step 1 are mixed so that these two kinds of bacteria can symbiize to obtain a refined mother liquid.

In this case, in order for the two types of bacteria to symbiize, the temperature is maintained at 38 to 40 ° C. and pH 6.0 to 7.0 to suit the symbiotic breeding after mixing. If necessary, an appropriate amount of sodium, peptone, and chrysalis can be added to create symbiotic conditions.

3rd step: Refining (1st refining step)

After injecting natural water into the refining furnace, the tough bast to be treated is dipped therein, and then the refining mother liquor obtained in step 2 is injected, and the temperature is maintained at 38 to 40 ° C. and the pH to 6.0 to 7.0, preferably 45 to 55 hours. Leave for 48 to 50 hours.

At this stage, the pectin in the cortex is corroded and eluted by anaerobic bacteria and degraded and oxidized by aerobic bacteria, resulting in complete removal of the pectin.

In this refining process, the refining liquid remaining after the collection of bast fibers can be reused.

The fourth step; Refining (2nd Refining Stage) -Random Stage

Inject the natural water into the scouring degree, immerse the scouring raw material first refined in the third step, and then inject the scouring mother liquor obtained in the second step, and then maintain the temperature at 60-70 ° C. for 45-55 hours, preferably Let it stand for 48 to 50 hours.

This step removes residual pectin as well as similar impurities that remain after the first refining in the third step.

In the first and second refining step, oxygen may be intermittently supplied for activation of bacteria.

5th step: washing and drying

Recover the bast fiber from which pectin has been removed in step 3 or 4 from the smelting furnace and then wash it with a cleaning agent and foaming agent to completely remove the pectin, foreign substances and non-fibrous substances separated from the cortex. Partially remaining chlorophyll, nitrogen compounds, and organics are removed and then dried to obtain pure tough bast fibers.

Hereinafter, embodiments of the present invention will be described. This example is again illustrative of the invention and should never be construed as limiting the scope of the invention.

Sixth step; Aging stage

The refined raw material washed in step 5 is subjected to aging for 46 to 50 hours at 60 to 70 ° C. after being tanned to maintain an optimal state.

As an example of the oil agent used, yeast estrone or palm oil etc. are mentioned.

EXAMPLE 1

Inject 5 ~ 6T of natural water into the refinery, dip 250 kg of hemp into this, and inject 10 l of the basic bacterium bacterium solution cultured separately and 20 l of the aerobic bacterium bacillus solution, and the temperature is 38 ~ 40 ℃, pH6.0∼7.0 Soak for 48-50 hours while maintaining.

Air was supplied for 10 minutes at 2 hour intervals.

After washing and drying, the pectin, which was fixed to the fiber, was corroded and eluted by basic bacteria and completely decomposed and dispersed by aerobic bacteria to obtain high-quality fibers retaining the fiber-specific characteristics.

EXAMPLE 2

5 to 6T of natural water was poured into the refinery, and 250 kg of hemp was added thereto. Then, a mixture of 10 liters of a basic bacterium bacterium solution and 20 liters of aerobic bacterium solution, which were separately cultured, was injected. After mixing, the temperature was maintained at 38 to 40 ° C. and pH 6.0 to 7.0.

After injecting the mixed bacterial solution, the mixture was allowed to stand for 48 to 50 hours while maintaining the temperature and pH.

Air was supplied for 10 minutes at 2 hour intervals.

After that, the same amount of bacteria was injected into a separate refining furnace, but the temperature was maintained at 60 to 70 ° C.

After washing, drying and aging, better fibers were obtained in Example 1.

EXAMPLE 3

250 kg of mulberry bark and mulberry bark were refined under the same conditions as in Example 1 to obtain high-quality toughness fibers as in Example 1.

EXAMPLE 4

250 kg of vine raw skin was refined under the same conditions as in Example 2 to obtain high quality fibers.

As described above, according to the method of the present invention, the anaerobic bacterial liquid and the aerobic bacterial liquid are simultaneously added or mixed to allow refining in a state in which both bacteria are symbiotic, thereby simplifying the process and increasing productivity. will be.

Claims (6)

Detecting aerobic bacteria from the bast fibers of tough plants and culturing and propagating them under conditions suitable for breeding the bacteria to obtain aerobic bacterial fluids; Detecting anaerobic bacteria from the bast fibers of tough plants and culturing and growing them under conditions suitable for breeding the bacteria to obtain anaerobic bacterial fluids; Preparing a refining mother liquor in which these two bacteria symbiize by mixing the aerobic bacterial liquid and anaerobic bacterial liquid obtained in each step and maintaining a temperature of 38 to 40 ° C. and a pH of 6.0 to 7.0 so that they can coexist; And Inject the natural water into the refinery and immerse the tough raw material to be treated therein, and then maintain the temperature of 38 ~ 40 ℃ and pH 6.0 ~ 7.0 and inject the mixed refining mother solution obtained in the above step and leave it for 45 ~ 55 hours. Refining the raw skin; Refining method of bast fiber comprising tough plant According to claim 1, characterized in that left for 48 to 50 hours after the injection of the mixed refining mother liquor Detecting aerobic bacteria from the bast fibers of tough plants and culturing and propagating them under conditions suitable for breeding the bacteria to obtain aerobic bacterial fluids; Detecting anaerobic bacteria from the bast fibers of tough plants and culturing and growing them under conditions suitable for breeding the bacteria to obtain anaerobic bacterial fluids; And After injecting natural water into the refinery and immersing the tough raw material to be treated therein, the aerobic bacterial solution and anaerobic bacteria solution are injected simultaneously or sequentially while maintaining the temperature of 38 ~ 40 ℃ and pH 6.0 ~ 7.0. Refining the tough skin for a time; Bast fiber refining method of tough plants, including Detecting aerobic bacteria from the bast fibers of a tough plant and culturing and propagating the bacteria under conditions suitable for breeding to obtain aerobic bacterial fluids; Detecting anaerobic bacteria from the bast fibers of tough plants and growing and growing under conditions suitable for the growth of the bacteria to obtain anaerobic bacterial fluids; Preparing a refined mother liquor in which the two bacteria coexist by maintaining the temperature of 38 to 40 ° C. and pH 6.0 to 7.0 so that the aerobic bacterial liquid and the anaerobic bacterial liquid obtained in each step are mixed together; Injecting natural water into the refining furnace and immersing the tough raw skin to be treated therein, and then maintaining the temperature of 38 ~ 40 ℃ and injecting the refining mother liquor in which the aerobic and anaerobic bacteria obtained in the above step symbiotic and left for 45 to 55 hours 1 refining step; A second refining step of washing the refining raw material having undergone the first refining step after being refined for 45 to 55 hours while maintaining the elevated temperature of 60 to 70 ° C in the refining mother liquor; And Aging step of leaving the washed refined raw material left for 46 to 50 hours at 60 ~ 70 ℃ temperature after tanning; Bast fiber refining method of tough fibers comprising a. The method according to any one of claims 1 to 4, Injecting oxygen during the refining step The method of claim 4, wherein the emulsion is selected from the group consisting of yeast and palm oil.