JP2010208976A - Method for producing anti-termite material and method or producing anti-termite solution - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing an anti-termite material, which reduces environmental load and stably supplies a material and a method for producing an anti-termite solution. <P>SOLUTION: The anti-termite substance is formed by carrying out pressurized hydrothermal treatment of an abundantly naturally-occurring bamboo material having slight seasonal variation. The anti-termite substance-containing bamboo material is made into a powdery state, mixed with or applied to a building material or mixed with acetone, the anti-termite substance is extracted and then concentrated, mixed with or applied to a building material to approximately annihilate termites. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for producing an anti-antibiotic material suitable for a building material used for a building as a measure against termites and a method for producing an anti-ant solution.

  The damage of buildings such as houses due to termites has occurred particularly in countries belonging to the temperate, subtropical and tropical regions, and the damage is enormous. When damaged by termites, the earthquake resistance is reduced, and buildings such as houses may collapse due to the occurrence of an earthquake. Therefore, in order to prevent damage caused by termites, it is common practice to mix or apply agricultural chemicals such as organic materials to wood.

  However, recently, environmental regulations are becoming stricter, so it is not preferable to use agricultural chemicals containing harmful substances. Therefore, in order to reduce the burden on the environment, new drugs such as boron compounds have been developed. For example, Patent Document 1 discloses an insect repellent material that contains a flavonoid derivative that does not adversely affect the human body and the environment, and that rapidly decomposes and disappears after a certain period of time.

JP 2002-60304 A

  However, the insect repellent material described in Patent Document 1 is made of pine wood such as red pine, black pine, and larch. Therefore, when logging is performed for use as a raw material, it takes a long time to grow to the original tree height, so there is a limit to the amount that can be used. Also, since the trees of the pine family have very large seasonal variations, the amount of substances contained in the wood may differ depending on the season in which the wood is collected, and stable performance cannot be obtained.

  SUMMARY OF THE INVENTION In view of the above-mentioned problems, the present invention aims to provide a method for producing an anti-antibiotic material and a method for producing an anti-ant solution that can reduce environmental burden and can stably supply a material. Yes.

  The method for producing an anti-antibitic material of the present invention is characterized by comprising a step of producing bamboo material containing an anti-antibiotic substance by subjecting the bamboo material to pressurized hot water treatment.

  The method for producing an anti-ant solution of the present invention comprises a step of producing bamboo material containing an anti-ant substance by pressure hot water treatment of the bamboo material, and the bamboo material containing the anti-ant substance and acetone are mixed. The method includes a step and a step of using acetone to extract the anti-antibiotic substance from the bamboo after the pressurized hot water treatment to generate an acetone extract.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing the load with respect to an environment, an anti-anticide material and an anti-ant solution can be supplied stably.

It is a figure which shows the relationship between the temperature and pressure in three phases of solid, liquid, and gas. It is a figure which shows the outline | summary of the pressurized hot water process in the Example of this invention. It is a figure which shows the measured value of the temperature and pressure of a pressurized hot water process in the Example of this invention. In the Example of this invention, it is a figure which shows the measurement result of the mortality rate after a pressurized hot water process. In the Example of this invention, it is a figure which shows the measurement result of the dead insect rate in an extract.

  As a result of intensive studies, the present inventor has abundantly existed, but paying attention to bamboo resources that are left as unused resources, antibacterial substances can be obtained by treating hot bamboo with pressurized hot water. I found out.

  Bamboo is a resource that has been studied in various places as one of the unused biomass. Bamboo is a resource that can be regenerated in a shorter period of time than other trees, and is known to repeat growth every 3 to 5 years. Therefore, if bamboo is harvested every four years, 650,000 to 2.1 million tons of moso bamboo can be harvested continuously in Japan. Moreover, since there is little seasonal variation compared to other trees, it can be stably supplied to the manufacturing plant.

  When such a bamboo material is subjected to pressurized hot water treatment, lignin and hemicellulose contained in the bamboo material are decomposed to generate phenols, aldehydes, furfurals and the like. And it has a function which exterminates a part by these, or these synthetically acting and controlling a termite.

  FIG. 1 is a diagram showing the relationship between temperature and pressure in the three phases of solid, liquid, and gas. The pressurized hot water is hot water in a liquid state of 100 ° C. or higher, and as shown in FIG. 1, the pressurized hot water can be generated by making the pressure higher than the normal pressure. Since the ion product of water increases as the temperature rises, it can be hydrolyzed without a catalyst such as an acid.

  If the temperature of the pressurized hot water is less than 100 ° C., the ionic product is not sufficiently large, and lignin is stably present, so that hydrolysis cannot be performed without using a catalyst such as an acid. . Further, when the temperature exceeds 200 ° C., it approaches the critical point, so that hydrolysis occurs excessively, and even the anti-anticidal substances necessary for termite extermination are decomposed. Therefore, as conditions for immersing the bamboo material, the temperature of the pressurized hot water is preferably 100 ° C to 200 ° C, and more preferably 120 ° C to 180 ° C.

  On the other hand, as for the pressure, it is desirable that the gauge pressure is 0.2 MPa to 1.0 MPa in order to maintain the liquid state. Note that when the gauge pressure is less than 0.2 MPa, the pressurized hot water is vaporized, and the temperature cannot be maintained at 120 ° C. On the other hand, if the pressure exceeds 1 MPa, the temperature rises above 180 ° C., and hydrolysis occurs excessively as described above.

  Bamboo wood that has been subjected to pressurized hot water treatment according to the above procedure contains anti-antibiotic substances, and this bamboo material is blended and applied to building materials to prevent termite damage. Can do.

  In the case of using a liquid in which the anti-antibiotic substance is further concentrated, a bamboo material that has been subjected to pressurized hot water treatment is powdered, mixed with acetone to separate the powder, and the remaining solution is concentrated. May be used. Acetone can extract an anti-antibiotic substance from bamboo that has been subjected to pressurized hot water treatment, and when left for a predetermined time, the anti-antibiotic substance penetrates into acetone. In order to sufficiently extract the anti-antibiotic substance, the time for leaving is desirably at least 6 hours, and more desirably 24 hours or more.

  In addition, although it is not necessary to concentrate after mixing acetone and isolate | separating powder, when workability | operativity, such as a coating process, is considered, it is desirable to concentrate. On the other hand, when applying to building materials without concentrating, it is desirable to devise so as to concentrate naturally in the work process.

Examples of the present invention will be described below.
As shown in FIG. 2, Mosouchi grown for 3 years was used as a sample and subjected to pressurized hot water treatment with an autoclave 20 at a pressure of 1.0 MPa and a temperature of 180 ° C. for 30 minutes. At this time, the treatment was performed in a state where the sample was completely immersed in hot water, and as shown in FIG. 3, the temperature and pressure were increased to the conditions over 40 minutes.

  Next, after making powdered Moso bamboo treated with pressurized hot water, 3g was collected, 3-7ml of distilled water was added to the petri dish and mixed, and then 30 ant termite ants and 3 soldier ants were added to the petri dish. And kept in a constant temperature container at 28 ° C. for 2 weeks.

  In addition, as a comparative example, 3 g of Moso-chiku and cedar wood that have not been subjected to pressurized hot water treatment are similarly sampled and mixed with 3 to 7 ml of distilled water in a petri dish and mixed. Three animals were placed in a petri dish and reared in a constant temperature container at 28 ° C. for 2 weeks.

In the above three types of samples, the number of dead insects was measured every 24 hours and measured three times. FIG. 4 is a diagram showing the measurement results of the mortality rate after the pressurized hot water treatment in this example.
As shown in FIG. 4, for the cedar wood that was not subjected to the pressurized hot water treatment, the termite death rate was only about 2.0%. Moreover, only about 40% death rate was obtained for Mosouchiku that was not subjected to pressurized hot water treatment. Although not shown in FIG. 4, only 15.2% mortality was obtained for cedar wood that had been subjected to pressurized hot water treatment.

  Next, Moso bamboo treated with pressurized hot water was powdered, and 10 g of the powder was placed in 100 ml of acetone and left at room temperature for 24 hours. And it separated by filtration into the powder and the extract. Further, n-hexane was used in place of acetone, and the powder and the extract were separated by filtration in the same procedure. And the powder separated by filtration was air-dried and the acetone extraction sample and the n-hexane extraction sample were produced.

  Similarly, 3 g of an acetone-extracted sample and n-hexane-extracted sample was collected, 3 ml to 7 ml of distilled water was added to the petri dish, mixed, and 30 termite ants and 3 soldier ants were placed in the petri dish. They were bred for 2 weeks in a thermostatic container at 0 ° C.

  As shown in FIG. 4, it can be seen that when the acetone extraction treatment is performed, the death rate is greatly reduced, and when the n-hexane extraction treatment is performed, the death rate is also reduced. From this, it can be seen that the anti-antibiotic substance was extracted from Moso bamboo by acetone treatment or n-hexane treatment.

  Based on the above results, next, the acetone extract was concentrated 10 times, 1 ml of the acetone extract was dripped onto a filter paper in a petri dish, air-dried at room temperature, and a sample to which 3 ml of distilled water was added was prepared. did. As a comparative example, n-hexane extract was similarly concentrated 10 times, 1 ml of n-hexane extract was dropped onto filter paper in a petri dish, air-dried at room temperature, and 3 ml of distilled water was added. A sample was prepared. Then, an experiment was conducted in which 30 craft ants and 3 soldier ants were forcibly contacted with each sample.

  In addition, in order to compare the extraction effect, a filter paper in which only 3 ml of distilled water was dropped was also prepared, and similarly, an experiment was conducted in which 30 craft ants and 3 soldier ants were forcibly contacted. In any sample, the number of repetitions was set to 3.

FIG. 5 is a diagram showing the measurement results of the death rate in the extract in this example.
As shown in FIG. 5, the death rate was only about 5% with distilled water alone, whereas the acetone extract concentrated 10 times had a death rate of 100%. On the other hand, in the n-hexane extract concentrated 10 times, the death rate was 15 to 20%. From this, it can be seen that when the acetone treatment is performed, the anti-antibiotic substance permeates into the acetone from Moso bamboo. Further, the results shown in FIGS. 4 and 5 indicate that the acetone treatment is more easily penetrated by the acetone treatment than by the n-hexane treatment. Although not shown in FIG. 5, the same test was performed on an acetone extract solution that had not been concentrated. As a result, the average mortality rate was 20.2%. If you do, the death rate will increase.

  As described above, according to the present example, when Moso bamboo treated with pressurized hot water is used in powder form and when a solution extracted with acetone is used, the termite death rate is approximately 100. %. Thereby, the building material which has anti-antility as a termite countermeasure can be provided by mix | blending, apply | coating, or inject | pouring to a building material. In addition, because bamboo material that is abundant in nature and has little seasonal variation is used, the material can be supplied stably. Furthermore, by carrying out the pressurized hot water treatment, a catalyst such as an acid is not required when producing the anti-antibiotic substance, so that it is possible to eliminate the trouble of performing the waste water treatment.

20 Autoclave

Claims (6)

  A method for producing an anti-antibitic material, comprising a step of producing bamboo material containing an anti-antibiotic substance by subjecting the bamboo material to pressurized hot water treatment.   The method for producing an anti-antibiotic material according to claim 1, wherein the temperature of the pressurized hot water treatment is 100 ° C to 180 ° C. A process of producing bamboo material containing anti-antibiotic substances by treating the bamboo material with pressurized hot water;
Mixing bamboo containing the anti-antibiotic substance with acetone;
A method for producing an anti-antibiotic solution, comprising: using acetone to extract the anti-antibiotic substance from the bamboo after the pressurized hot water treatment to generate an acetone extract.   The method for producing an anti-antibiotic solution according to claim 3, wherein a temperature of the pressurized hot water treatment is 100 ° C to 180 ° C.   The method for producing an anti-antibiotic solution according to claim 3 or 4, further comprising a step of concentrating the acetone extract.   4. The step of producing the acetone extract comprises the step of separating the bamboo after mixing the bamboo after the pressurized hot water treatment with acetone and leaving it for 6 hours or more. The manufacturing method of the anti-ant ant solution of any one of -5.

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