JPS5929601A - Method for preserving green of green plant and green preserving agent - Google Patents

Abstract

PURPOSE:To preserve the green of a green plant in which the green color is very difficultly preserved due to the rich silicified cells by the well-known techniques, by dipping the green plant, e.g. a bamboo stem, bamboo leaf, rice plant straw or rush, in an aqueous solution containing a copper salt and sodium acetate. CONSTITUTION:A green plant, e.g. bamboo stem, bamboo leaf, rice straw or rush, is dipped in an aqueous solution of a green preserving agent containing 100-66pts.wt. based on 100pts.wt. copper salt, e.g. copper sulfate, copper nitrate, copper sulfate or/and copper acetate, sodium acetate, under heating the aqueous solution, and the green preserving effect of the green plant is made possible by the stabilizing effect of the chlorophyll by copper ions and pH buffering action by the sodium acetate and the alkaline synergistic effect. The copper salt is acidic and alone is toxic to the green plant. On the other hand, the above- mentioned effect is not produced due to the slight solubility of the copper salt in water on the alkaline side. The use of the sodium acetate solves the above- mentioned disadvantages and prevents the fading by the oxidation during the storage thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for maintaining the green color of green plants, and more specifically, the present invention relates to a method for maintaining the green color of green plants, which are rich in silicified cells such as bamboo stems, bamboo leaves, rushes, and rice straw, and it has been considered extremely difficult to maintain the green color using conventional techniques. This is a method for maintaining the green color of green plants.

These are things that are familiar to our daily lives, such as processed products, bamboo crafts, rice straw crafts, rush tatami mats, etc., and even though it is clear that the value of the product will improve if the green color can be maintained, it has not been resolved to this day. The current situation is ℃・runo.

Conventional techniques for preserving green color include the use of copper salts, alkaline solutions, and aqueous alkaline solutions of sodium acetate and aqueous solutions, but these can be applied to green plants with few silicified cells, such as cucumbers and bracken. Experiments have shown that none of these methods can be applied to plants with highly silicified cells, or even plants that are covered with glass.

The possible reason for this is that silicified cells inhibit the contact between chlorophyll and the nuclear drug, but
The existence of other unexplained causes has also been confirmed. For example, one of the inventors of the present invention has developed a patent application publication number 1975-g/Sdas that shows that bamboo stems are immersed in a combined treatment solution of alkaline agent and sodium acetate. (・But I didn't see any effect. It's not a mistake.
On the contrary, it coincided with a phenomenon that seemed to accelerate the disappearance of the color green.

After a long period of trial and error, the present inventor discovered that it is possible to maintain the green color of nuclear green plants for a long period of time only by immersing them in an aqueous solution containing a combination of copper salts and sodium acetate.

Chlorophyll, which makes up the green color, is easily decomposed by Biao Yi and by chlorophyllase, a chlorophyll-degrading enzyme, to form yellow 7-eophytin, and to inhibit this, alkaline agents and copper salts are used. In the latter case, a method has been considered in which Mg, which is the central structure of chlorophyll, and Ou ions are combined to form copper chlorophyll and stabilized.

The present invention was able to achieve its objective only by virtue of the latter basic principle and the synergistic effect of the pH buffering effect of sodium acetate and alkalinity.

That is, the composition of the present invention is bamboo stems, bamboo leaves, and rice straw.

This is a method for preserving the green color of green plants, such as rushes, which is characterized by immersing the green plants in an aqueous solution containing copper salts and sodium acetate to maintain the green color. Furthermore, we have developed a method for preserving the green color of green plants, which involves heating and soaking green plants such as bamboo stems, bamboo leaves, rice straw, and rushes in an aqueous solution containing copper salts and sodium acetate. be. In addition, it is also possible to heat after dipping during the above steps.

Sodium acetate 100 to At to 700 parts by weight of copper salts
It is a green color retaining agent for green plants containing parts by weight. In addition,
The copper salt may be one of copper nitrate and copper sulfate, or a combination of two or more thereof.

Therefore, copper nitrate, copper sulfate, copper acetate, etc. are acidic.
Acidity has a significant detrimental effect on the retention of green color, and in this sense, it is inherently harmful to the retention of green color. However, as mentioned above (Ou ions have a remarkable effect on stabilizing chlorophyll. In order to promote this effect of Ou ions, alkalinity is theoretically desirable, but alkaline aqueous solutions are difficult to dissolve in water. It becomes copper hydroxide, and is not salt resistant due to the combination of Ou ions and Mg in chlorophyll.To solve this problem, use sodium acetate, which is alkaline, to neutralize it and create a slightly acidic atmosphere. What is more interesting is that even after neutralization, the pH buffering effect of sodium acetate is more effective, as will be seen in the examples below, and this prevents discoloration due to oxidation during storage. Sodium acetate differs significantly from other alkaline agents simply by the significant concomitant effects that are considered to be prevented.

Next, regarding an embodiment of the present invention, desirably, the treatment liquid is immersed at a high temperature.

In particular, those that are particularly susceptible to silicified cells such as polymorphs and have a weak resin content are inhibited by low-temperature treatment solutions, making it difficult for the reaction to proceed. When the processing solution is heated to a high temperature, the surface adhesion resin separates and softens the surface structure, helping the drug to permeate and facilitating the reaction. More importantly, immersion in a high-temperature aqueous solution destroys the plant's chlorophyll-degrading enzyme chlorophyllase, which helps maintain green color for a long period of time.

Bamboo leaves, rushes, and rice straw, which are considered to have fewer silicified cells and are easier to react with, can have practical effects simply by immersing them in a room-temperature treatment solution, but in this case, long-term immersion is required. Furthermore, the method of rapidly drying rush rice straw based on conventional experience is also preferable in the present invention, and inactivating the enzyme action by drying without destroying the enzyme by high heat is a stable method for maintaining green color. It can be understood that it is effective by

According to experiments, copper salts such as copper nitrate, copper sulfate, and copper acetate are all effective, but the least toxic is copper acetate, which has a high pH and is sufficiently effective.The present invention is inexpensive and easily available. Moreover, it can be said that it can be fully put into practical use by using a less toxic drug.

Another feature is that the processing solution can be used many times. For this reason, it can be said to be extremely advantageous in terms of cost and prevention of pollution caused by elements.

Furthermore, even though it was possible to maintain the green color, as shown in the examples below, as drying progresses, the green color decreases to a certain level in all cases, and no subsequent decrease in green color is observed. It is natural that if the surface is coated with a transparent clear coat, oil, etc. after treatment, the reduction in green discoloration to a certain level will be significantly prolonged over time. It has no effect and is only effective as a post-treatment of the above-mentioned treatment method.

As mentioned above, it is known that it is possible to use copper salts alone in green plants with few silicified cells, such as cucumbers and bracken; The present invention is essential for maintaining the green color of green plants for a long period of time, and the present invention has made it possible to maintain the green color, which is a long-awaited goal of the industry, by using inexpensive and easily available chemicals and a simple device. This is an excellent effect, which significantly expands the development of applications, and in this sense, the present invention can be said to be an excellent invention that can be put into practical use. In other words, the present invention maintains the green color of the material and expands its use as a building material, rather than just increasing the commercial value of conventional bamboo crafts. Bamboo and Japanese-style architecture are deeply familiar, but if the green color can be maintained, it can be used as an indoor and outdoor building material as an interior material that gives a refreshing feeling.Furthermore, when the present invention is applied to rushes, it will have a high degree of green color. As is clear from the examples described later, it is possible to create a tatami surface with a long-lasting durability, and the green color retention is far superior to the conventional method of applying mud to collected rushes and letting them dry to retain their green color. This is an essential feature of Japanese architecture, and the durability of tatami can be significantly improved.

The same holds true for straw products; by maintaining their green color, they can maintain their simplicity and freshness, which is a factor that should be reconsidered from a new angle.

Hereinafter, the present invention will be explained in more detail with reference to Examples.

Example 1 Various methods were tried to find an appropriate processing method, and some of them will be posted here.

The display of color tone is based on GIS, and all are displayed in HVO values because we believe that it is more convenient for comparison to indicate the position of the Munsell hue circle using the HVO method than displaying in Yxy.

The sample used in the experiment was grass G strained and HVO immediately after collection.
A value of l, 3GY only was used.

Immediately after treatment, the samples were left outdoors, and the color tone was measured after 3 weeks.

No. Treatment agent Treatment conditions pVa value Remarks ■No treatment /θYR~5YR yellow red■
3% copper sulfate Soaked for 72 hours Same as above Same as above
Same as above 03% copper acetate Same as above Same as above ■ 3% Copper nitrate Same as above Same as above 03% Sodium acetate Same as above Same as above 03% Soda carbonate Same as above Same as above 075% 1'15 acid V-Pa Same as above Same as above 2% Soda carbonate ■ 脣MO Fyo-2. Same as above Same as above ■ 3% copper acetate 3% acetic acid two 2. Same as above.
Top [Phase] 3% copper nitrate 3% acetic acid sorter Same as above Same as above Same as above 03% copper sulfate / 0 (1'c / 0 minute immersion No Y
zuY Yellow [phase] 3% copper acetate Same as above
5Y Same as above 03% Copper nitrate Same as above
/θYtonoY Same as above 03% Sodium acetate Same as above
/θY83YR Red yellow o 3% soda carbonate Same as above Same as above Same as above o /S% Vinegar + tz-y Same as above Same as above 2% Soda carbonate o 2% Copper sulfate 3% Acetic acid two, Same as above /QY-230Y
Yellow Green [Phase] 3% copper acetate 3% acetic acid 2. Same as above 1GY x %Y Yellow green As is clear from the above results, simply immersing in the treatment solution has no effect / θ0 'C / 0 minute immersion (・Although copper salts alone have some effect, acetic acid When used in combination with soda, greening is significantly improved.

Example 2 Example 1 showed excellent green discoloration (・fvo [phase] [phase] was subjected to a standing test after 3 months.

Number pvc (Direct Notes @/ 75Y-10Y Yellow [Phase] -/
'13Y-10Y Same as above [phase] -/
3Y to 73Y Same as above As mentioned above, a slight decrease in green discoloration was observed, but at this level the appearance showed an upper edge color and the purpose was sufficiently achieved (・Thus, it can be concluded that this is a semi-permanent green preservation treatment method. .

Example 3 We investigated whether or not it was possible to use the treatment liquid in duplicate for the least toxic and most effective [phase].The lack of liquid due to evaporation and other reasons was supplemented with a new [phase] mixed solution. The results of the /θ treatment several times are shown in [phase]-ko.1゜The experimental method is the number according to Example 1. PVO value PHσΦ of the treatment solution
10Y-1!5GY! Otsu / [phase] -2
10Y-2,5'Gy, igug As mentioned above, there was no change in pH and the pvc value remained unchanged (possibly due to the pH buffering effect of sodium acetate), so it was proven that it could withstand repeated use.

Example 4 The relationship between the temperature of the treatment liquid and the immersion time was tested for the (-) property group in the formulation of the [phase].

The experimental method is numbered according to Example 1. Temperature of treatment liquid Immersion time PVO value
Remarks■ Always wet 72 hours /QYR~s
YR red yellow [phase] 100℃ 10 minutes 10
PkeGY Yellow a [phase] -3700℃ 5 minutes
3 uY Yellow @-11g3℃ 20 min/Qr-,), 3Gy Yellow@-j-75℃ 3
0 minutes Preparation Y Yellow In the case of the passable groups shown in the table above, a treatment temperature of 5°C or higher is considered to be a necessary condition.

Example 5 Among the materials with many silicified cells other than bamboo leaves, rice straw, rushes, etc., bamboo leaves are the most difficult to maintain greening.
I processed it.

The bamboo leaves used in the experiment had a PVO value of 2.30 immediately after being collected.
The results of an outdoor test using only Y to 50Y after 44 months are shown.

The composition of the treatment liquid for 0 was determined by [phase].

Number Processing method Pvb value Notes [phase]
Untreated 10YR red yellow o 100℃109rfla 10Y yellow
As shown in the table above, bamboo leaves have also been proven to be effective.

Example 6 Among bamboo leaves, rice straw, rushes, etc., rushes, which are considered to be the most in demand, were treated.

The rush used in the experiment had a pya value of SGY~73 immediately after harvesting.
The results of an outdoor test of GY after a month of moss are shown. Note that ① [Phase] is obtained by soaking in the mixed processing solution of [Phase].

Number Treatment method PVA value Notes [Phase] Untreated 2.3Y Yellow [Phase] [Phase] Drying after mud coating 3Y~2.3Y
Yellow ■ 10P C 10 minutes immersion then drying /θY
-23GY Yellow Green [Phase] Dried after soaking at room temperature for U hours 75Y to 10Y Yellow Green As shown in the table above, it was found that the present invention was significantly more effective in retaining the green color than the conventional mud coating drying method.

In addition, it has been proven that the treatment solution heated and immersed is more effective in a shorter time than the room-temperature immersion, and a greenness of i is practically sufficient.

(The mud of [phase] is made by dissolving rush soil from Awaji Island, which has been conventionally used.) Example 7 According to Example 1, the blending amounts of copper acid and acetic acid sorter were studied.

Number compounded drug Conditions PVA value Notes 03
% Sodium acetate 700°C 10 minutes immersion/QYR-J73Y
R red yellow 03% copper acetate - same as above 5Y
Yellow As shown in the table above, 2% or more sodium acetate is required for 3% sodium acetate, but as shown in Example 3, [phase]
- Sodium acetate 3
% seems to be good.

Example 8 The retention of green discoloration was tracked on a product that was immediately coated with liquid paraffin and acrylic resin after being treated with [Phase].

No. Treatment method PVA value after 3 weeks PVA value after q months [phase] /θtoku3GY/θY~73Y [phase]-6 Liquid paraffin application
, 25GY (estimated) 10$7. ! ;Y (guess) @
-7”'j'ri') resin coating 23GY (visual measurement)
10Y-'7. ．． ! ;C+Y (estimated) [Phase] Acrylic resin coating only/QYR~15YR (in the above table)
Visual measurement) seems to be due to the influence of the refractive index when measured with a color difference meter, but [
Phase]-B, [Phase]-7, and [Phase] were all determined by visual measurements, not just calculated values, by five experienced color difference meter operators, as no relevant values could be obtained for any of them. As shown in the table above, the effect of Coanda is recognized. Those that were simply coated with resin without being immersed in a treatment solution had no effect on retaining the green color.

Claims (1)

[Claims] / Retention of the green color of green plants, which is characterized by immersing green plants such as bamboo stems, bamboo leaves, rice straw, and rushes in an aqueous solution containing copper salts and sodium acetate to maintain the green color. Method. A method for preserving the green color of green plants, which comprises heating and soaking green plants such as bamboo stems, bamboo leaves, rice straw, and rushes in an aqueous solution containing copper salts and sodium acetate. 3. A green color retention agent for green plants containing 100 to 4 parts by weight of sodium acetate per 100 parts by weight of copper salts.