CN113459233A

CN113459233A - Compound preservative, preparation method thereof and fixation preservative method

Info

Publication number: CN113459233A
Application number: CN202110771339.1A
Authority: CN
Inventors: 于海霞; 王进; 庄晓伟; 徐漫平; 张文福; 何生亮; 杨伟明
Original assignee: Zhejiang Academy of Forestry
Current assignee: Zhejiang Academy of Forestry
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-10-01
Anticipated expiration: 2041-07-08
Also published as: CN113459233B

Abstract

The invention belongs to the technical field of bamboo and wood protection, and particularly relates to a compound preservative, a preparation method thereof and a fixation preservative method. The compound preservative provided by the invention contains a preservative, a protective synergistic passivator and a fixing agent. The bamboo wood micro capillary tubes or cell walls are impregnated under high pressure or ultrahigh pressure, the molecular weight of the anticorrosion functional components in the compound preservative is low, the anticorrosion functional components penetrate into the bamboo wood micro capillary tubes or cell walls along with a solvent, and the molecular weight of the phenolic resin, the shell powder and the crab shell powder is high and deposits on the bamboo wood capillary tubes and subsurface tissues. The phenolic resin is cured to generate strengthening fixation, so that the organic components of the bamboo and/or wood are isolated, a passivation protective layer is formed, and the loss of the anticorrosion functional components in use is greatly reduced. The protective synergistic passivant is rich in bacteriostatic substances such as chitosan and the like, not only effectively prevents mildew, but also reduces the surface hygroscopicity of bamboo and wood materials and increases the hardness. The preservative, the protective synergistic passivator and the phenolic resin form layer-by-layer protection and slow release, and the effect of long-acting protection is achieved.

Description

Compound preservative, preparation method thereof and fixation preservative method

Technical Field

The invention belongs to the technical field of bamboo and wood protection, and particularly relates to a compound preservative, a preparation method thereof and a fixation preservative method.

Background

The anti-corrosion wood is a kind of functional wood which is endowed with common wood for preventing microorganism from invading by adding a chemical preservative, and the anti-corrosion wood can directly contact with soil and a humid environment, so that the application range of the wood is expanded. The reasonable use of the preservative can not only prolong the service life of the wood and save the wood raw materials, but also play a role in protecting forest resources, and has good economic and ecological benefits.

Most of the traditional water-soluble preservatives contain heavy metal elements as main components, such as Copper Chromium Arsenic (CCA), ammonia-soluble copper zinc arsenate (ACAZ) and the like. The traditional water-soluble preservative has good preservative performance, but pollutes soil or a water system due to the loss of heavy metal elements. In order to reduce the environmental pollution caused by the preservative, copper-based water-soluble preservatives such as quaternary Ammonium Copper (ACQ) or copper azole (CuAz) are commonly used in the market at present, but the fixation of copper-based water-soluble preservatives in wood is weak, so that the preservative effect is affected.

Disclosure of Invention

In view of the above, the invention provides a compound preservative, a preparation method thereof and a fixation preservative method.

In order to solve the technical problems, the invention provides a compound preservative which comprises the following components in percentage by mass:

the protective synergistic passivator comprises shell powder and crab shell powder, wherein the mass ratio of the shell powder to the crab shell powder is (5-20) to (3-10);

the preservative comprises a copper-based water-soluble preservative solution, a nano metal dispersion, a nano metal oxide dispersion, a metal salt solution or a mixture of a boron compound and water;

the nano metal dispersion liquid comprises nano silver dispersion liquid, nano copper dispersion liquid or nano zinc dispersion liquid;

the nano metal oxide dispersion liquid comprises a nano silver oxide dispersion liquid, a nano copper oxide dispersion liquid or a nano zinc oxide dispersion liquid;

the metal salt solution comprises one or more of a zinc salt solution, a copper salt solution, an iron salt solution and a manganese salt solution;

the boron compound in the mixture of boron compound and water comprises sodium tetraborate, sodium octaborate, sodium pentaborate, or zinc borate.

Preferably, the copper-based water-soluble corrosion inhibitor comprises quaternary ammonium copper, copper azole or copper chromium arsenic;

when the preservative is a copper-based water-soluble preservative solution, the mass percentage of the copper element in the compound preservative is 0.5-1.8% by mass of the copper element.

Preferably, the pH value of the metal salt solution is 8.5-9.5.

Preferably, when the preservative is a metal salt solution, the mass percentage of the metal salt in the compound preservative is 0.5-5%.

The invention also provides a preparation method of the compound preservative in the technical scheme, which comprises the following steps:

adding shell powder and crab shell powder into phenolic resin, and continuously stirring to obtain a primary compound preservative;

and mixing the primary compound preservative, the preservative and water to obtain the compound preservative.

The invention also provides a fixation anticorrosion method, which comprises the following steps:

soaking the dried bamboo or wood in a compound preservative, and then curing at high temperature to obtain the preservative bamboo or wood; the compound preservative is the compound preservative in the technical scheme or the compound preservative obtained by the preparation method in the technical scheme.

Preferably, the impregnation comprises one-step impregnation or two-step impregnation;

the one-step impregnation is vacuum high-pressure impregnation or ultrahigh-pressure impregnation, the vacuum degree of the vacuum high-pressure impregnation is-0.08 to-0.12 MPa, the pressure is 1.1 to 1.5MPa, and the time is 0.5 to 2 hours;

the pressure of the ultrahigh pressure impregnation is 100-150 MPa, and the time is 15-30 min;

the two-step impregnation comprises the following steps:

performing first impregnation on the dried bamboo or wood in a preparation B to obtain first anti-corrosion bamboo or first anti-corrosion wood; the preparation B is a preservative;

carrying out second impregnation on the first anti-corrosion bamboo wood or the first anti-corrosion wood in the A preparation to obtain second anti-corrosion bamboo wood or second anti-corrosion wood; the A preparation is prepared by mixing phenolic resin, shell powder, crab shell powder and water.

Preferably, the first impregnation is ultrahigh pressure impregnation, the pressure of the ultrahigh pressure impregnation is 90-130 MPa, and the time is 15-25 min;

the second impregnation is vacuum high-pressure impregnation, the vacuum degree of the vacuum high-pressure impregnation is-0.08 to-0.12 MPa, the pressure is 1.1 to 1.5MPa, and the time is 0.5 to 2 hours.

Preferably, the curing temperature is 130-150 ℃ and the curing time is 20-40 min.

Preferably, the water content of the dried bamboo or wood is 8-15%;

the mass ratio of the dry bamboo or wood to the compound preservative is 1-1.5: 5.

the invention provides a compound preservative which comprises the following components in percentage by mass: 5-30% of phenolic resin, 8-30% of protective synergistic passivator, 5-18% of preservative and the balance of water; the protective synergistic passivator comprises shell powder and crab shell powder, wherein the mass ratio of the shell powder to the crab shell powder is (5-20) to (3-10); the preservative comprises a copper-based water-soluble preservative solution, a nano metal dispersion, a nano metal oxide dispersion or a metal salt solution; the nano metal dispersion liquid comprises nano silver dispersion liquid, nano copper dispersion liquid or nano zinc dispersion liquid; the nano metal oxide dispersion liquid comprises a nano silver oxide dispersion liquid, a nano copper oxide dispersion liquid or a nano zinc oxide dispersion liquid; the metal salt solution comprises one or more of a zinc salt solution, a copper salt solution, an iron salt solution and a manganese salt solution; the boron compound in the mixture of boron compound and water comprises sodium tetraborate, sodium octaborate, sodium pentaborate, or zinc borate. In the invention, the preservative can permeate into the bamboo or wood and is uniformly distributed; the phenolic resin, the shell powder and the crab shell powder are solidified on the capillary pipeline and the surface of the bamboo or wood to form a protective layer, so that the preservative in the cells is protected, and meanwhile, the preservative in the cells is slowly released, and the preservative effect is prolonged. The shell powder and the crab shell powder can also increase the flexibility and weather resistance of the phenolic resin, and simultaneously have antibacterial activity, thereby further improving the anticorrosion effect. In the invention, the hydrophobic effect of the cured phenolic resin can play a forced fixation effect on the preservative, greatly reduce the loss of the preservative in use and improve the environmental friendliness.

The invention also provides a method for strengthening fixation of the preservative in the bamboo wood, which comprises the following steps: soaking the dried bamboo or wood in a compound preservative, and then curing at high temperature to obtain the preservative bamboo or wood; the compound preservative is the compound preservative in the technical scheme or the compound preservative obtained by the preparation method in the technical scheme. The phenolic resin is used as a fixing agent, a certain proportion of shell powder and crab shell powder is added to serve as a protective synergistic passivating agent, the protective synergistic passivating agent and a preservative are compounded to serve as a compound preservative, the compound preservative is impregnated into bamboo or wood to play a role in corrosion prevention, the phenolic resin, the shell powder and the crab shell powder basically stay in a subsurface microcapillary pipeline to play a role in filling, the preservative can be fixed in the bamboo or wood tissue after the resin is solidified, the preservative can be effectively prevented from running off in the using process, and the harm of the preservative to the environment is greatly relieved. Meanwhile, the phenolic resin is cured to form a film to form a first layer of protection, and if the phenolic resin is worn, cracked and the like in the using process, the preservative in the phenolic resin starts to play a role, so that the phenolic resin plays roles of layer-by-layer protection and slow release.

Detailed Description

The invention provides a compound preservative which comprises the following components in percentage by mass:

the preservative comprises a copper-based water-soluble preservative solution, a nano metal dispersion, a nano metal oxide dispersion or a metal salt solution;

The compound preservative provided by the invention comprises 5-30% of phenolic resin by mass percentage, and preferably 20-25%. In the invention, the viscosity of the phenolic resin is preferably 50-200 mPas, more preferably 100-120 mPas; the pH value is preferably 8-12; the solid content is preferably 35-55%, and more preferably 40-45%.

The compound preservative provided by the invention comprises 8-30% of protective synergistic passivator by mass percentage, and preferably 22-25%. The protective synergistic passivator comprises shell powder and crab shell powder, wherein the mass ratio of the shell powder to the crab shell powder is (5-20): (3-10), and preferably (15-18): (5-7). In the invention, the grain diameters of the shell powder and the crab shell powder are preferably 800-1200 meshes independently, and more preferably 1000 meshes.

The compound preservative provided by the invention comprises 5-18% of preservative by mass percentage; the corrosion inhibitor comprises a copper-based water-soluble corrosion inhibitor solution, a nano metal dispersion liquid, a nano metal oxide dispersion liquid, a metal salt solution or a mixture of a boron compound and water. In the present invention, the copper-based water-soluble corrosion inhibitor preferably includes quaternary Ammonium Copper (ACQ), copper azole (CuAz), or Copper Chromium Arsenic (CCA), more preferably quaternary ammonium copper or copper azole. When the preservative is a copper-based water-soluble preservative solution, the mass percentage of the copper element in the compound preservative is preferably 0.5-1.8%, and more preferably 1-1.5% by mass of the copper element. The concentration of the copper-based water-soluble preservative solution is not particularly limited, as long as the copper-based water-soluble preservative solution can meet the mass percentage content of copper element in the compound preservative.

In the present invention, the nano metal dispersion includes a nano silver dispersion, a nano copper dispersion or a nano zinc dispersion, and preferably, the nano silver dispersion or the nano copper dispersion. In the present invention, the particle size of the nano metal in the nano metal dispersion liquid is preferably 20 to 50 nm.

In the present invention, the nano metal oxide dispersion includes a nano silver oxide dispersion, a nano copper oxide dispersion or a nano zinc oxide dispersion, and preferably, the nano copper oxide dispersion or the nano silver oxide dispersion. In the present invention, the particle size of the nano metal oxide in the nano metal oxide dispersion liquid is preferably 20 to 50 nm.

In the present invention, the solvent of the nano metal dispersion and the nano metal oxide dispersion is preferably water; the concentration of the nano metal dispersion liquid and the concentration of the nano metal oxide dispersion liquid are preferably 0.5-5% independently, and more preferably 2-3%.

In the invention, the metal salt solution comprises one or more of a zinc salt solution, a copper salt solution, an iron salt solution and a manganese salt solution, and preferably the zinc salt solution, the iron salt solution, the copper salt solution and the manganese salt solution; the mass ratio of zinc, iron, manganese and copper in the zinc salt solution, the iron salt solution, the copper salt solution and the manganese salt solution is 3:3:1: 5. In the present invention, the metal salt solution is preferably a metal nitrate solution (a readily soluble, nitrogen-containing element). In the invention, when the preservative is a metal salt solution, the mass percentage of the metal salt in the compound preservative is preferably 0.5-5%, and more preferably 2-3.5%. In the invention, when the metal salt solution comprises more than two specific substances, the dosage and the proportion of the specific substances are not particularly limited, as long as the mass percentage of the metal salt in the compound preservative can be satisfied.

In the invention, the pH value of the metal salt solution is preferably 8.5-9.5, and the pH value regulator for regulating the pH value of the metal salt solution is preferably 1mol/L ammonia water or 0.5mol/L nitric acid. The pH value of the metal salt solution limited in the range can ensure the stable existence of the compound preservative.

In the present invention, the boron compound in the mixture of boron compound and water comprises sodium tetraborate, sodium octaborate, sodium pentaborate or zinc borate, preferably zinc borate. In the invention, the mass percentage of the boron element in the compound preservative is preferably 3-15%, and more preferably 5-10%. The invention has no special limitation on the mass percentage of the boron compound in the mixture of the boron compound and water as long as the mass percentage of the boron element in the compound preservative can be satisfied.

The compound preservative provided by the invention also comprises the balance of water in percentage by mass.

According to the invention, shell powder and crab shell powder are added into phenolic resin, and the mixture is continuously stirred to obtain the primary compound preservative. The invention has no special limitation on the rotating speed and the time of stirring, and the stirring is only required to be uniform.

After the primary compound preservative is obtained, the primary compound preservative, the preservative and water are mixed to obtain the compound preservative. The mixing is not particularly limited in the present invention as long as it can be mixed uniformly.

The compound preservative can be prepared only according to the preparation steps defined above, otherwise the preservative effect is influenced.

The invention also provides a method for strengthening fixation of the preservative in the bamboo wood, which comprises the following steps:

In the present invention, the wood preferably comprises poplar or pinus massoniana, more preferably poplar; the bamboo material preferably comprises moso bamboo. In the invention, the moisture content of the dried bamboo or wood is preferably 8-15%, and more preferably 10-12%. The invention has no special requirement on the drying mode of obtaining the dried bamboo or wood, and the invention only needs to ensure that the moisture content of the bamboo or wood is within the range. The temperature for drying in the examples of the present invention was 80 ℃. In the present invention, the impregnation preferably includes one-step impregnation or two-step impregnation. In the invention, when the impregnation is one-step impregnation, the mass ratio of the dried bamboo or wood to the compound preservative is preferably 1-1.5: 5, more preferably 1.1 to 1.2: 5. in the invention, the one-step impregnation is preferably vacuum high-pressure impregnation or ultrahigh-pressure impregnation, and the vacuum degree of the vacuum high-pressure impregnation is preferably-0.08 to-0.12 MPa; the pressure is preferably 1.1-1.5 MPa; the time is preferably 0.5-2 h. The pressure of the ultrahigh pressure impregnation is preferably 100-150 MPa, and the time is preferably 15-30 min. The present invention is not particularly limited as long as the desired degree of vacuum can be obtained. In the embodiment of the invention, dried bamboo or wood and compound preservative are filled into a plastic bag, vacuumized and plastically packaged to obtain the required vacuum degree. The invention can remove the compound preservative and the air in the bamboo or wood by dipping under the vacuum condition, thereby improving the dipping rate. The metal ions, nano metals, metal oxides or copper-based preservatives in the compound preservatives have strong permeability under high pressure, and can permeate into cells of bamboo or wood more quickly.

In the present invention, when the impregnation is a two-step impregnation, the two-step impregnation preferably comprises the steps of:

Performing first impregnation on the dried bamboo or wood in a preparation B to obtain first anti-corrosion bamboo or first anti-corrosion wood; the preparation B is a preservative. In the invention, the mass ratio of the dried bamboo or wood to the preservative is preferably 1-1.7: 5, more preferably 1.1 to 1.2: 5. in the invention, the first impregnation is preferably ultrahigh pressure impregnation, and the pressure of the ultrahigh pressure impregnation is preferably 90-130 MPa, and more preferably 100-120 MPa; the time is preferably 15 to 25min, and more preferably 20 to 23 min.

In the present invention, the first impregnation preferably further comprises: drying the first impregnated product, wherein the drying temperature is preferably 40-60 ℃, and more preferably 50-55 ℃; the time is preferably 3 to 6 hours, and more preferably 4 to 5 hours.

After the first anti-corrosion bamboo wood or the first anti-corrosion wood is obtained, carrying out second impregnation on the first anti-corrosion bamboo wood or the first anti-corrosion wood in the A preparation to obtain a second anti-corrosion bamboo wood or a second anti-corrosion wood; the A preparation is prepared by mixing phenolic resin, shell powder, crab shell powder and water. In the present invention, the water is preferably deionized water. In the invention, the mass ratio of the dried bamboo or wood to the A preparation is preferably 1: 1.2-5, and more preferably 1: 3-4. In the invention, the second impregnation is preferably vacuum high-pressure impregnation, and the vacuum degree of the vacuum high-pressure impregnation is preferably-0.08 to-0.12 MPa; the pressure is preferably 1.1-1.5 MPa; the time is preferably 0.5-2 h. The present invention is not particularly limited as long as the desired degree of vacuum can be obtained. In the embodiment of the invention, the first antiseptic bamboo material or the first antiseptic wood material and the A preparation are filled into a plastic bag, vacuumized and plastically packaged to obtain the required vacuum degree.

In the present invention, it is preferable that the curing composition further comprises: taking out the soaked product from the plastic bag for plastic packaging, and drying; the drying temperature is preferably 45-55 ℃, and more preferably 50-55 ℃. In the invention, the water content of the dried product is preferably 10-15%, and more preferably 12-13%. The drying time is not particularly limited as long as the desired moisture content can be achieved.

In the invention, the curing temperature is preferably 130-150 ℃, and more preferably 135-140 ℃; the time is preferably 20 to 40min, and more preferably 25 to 30 min.

In the invention, the impregnation can be divided into one-step impregnation and two-step impregnation, wherein in the one-step impregnation, a compound preservative is added at one time; in the two-step impregnation, phenolic resin, shell powder, crab shell powder and water are mixed to obtain a preparation A, and a preservative is used as a preparation B; the first of the two impregnations was an impregnation in the B formulation and the second impregnation was an impregnation in the a formulation. According to the invention, under the condition of high-pressure impregnation, effective anticorrosion functional components in the preservative penetrate into deep tissues or cells of the bamboo or wood, the phenolic resin, the shell powder and the crab shell powder are deposited on capillary pipelines and surface tissues of the bamboo or wood, strong fixation is generated along with the solidification of the phenolic resin, organic components in the bamboo or wood are isolated, and a passivation protective layer is formed, so that the flexibility and weather resistance of the phenolic resin are increased, and the shell powder and the crab shell powder also have antibacterial property and double protection are achieved. The hydrophobic characteristic of the cured phenolic resin can play a forced fixation effect on the preservative, greatly reduce the loss of the preservative in use, realize deep penetration of the preservative, passivation and bacteriostasis of the shell powder and the crab shell powder on the surface layer and fixation of the phenolic resin, realize long-acting spectral protection on microorganisms due to triple synergistic effects, and reduce the harm of preservative loss on water and soil.

In order to further illustrate the present invention, the following embodiments are described in detail, but they should not be construed as limiting the scope of the present invention.

Example 1

Processing poplar into a sample with the thickness of 20 multiplied by 50mm, and drying at 80 ℃ until the water content is 12 percent to obtain dried wood;

and (2) drying the wood according to the mass ratio of 1:3, soaking in an ACQ solution (the mass percentage of the copper element in the compound preservative is 1.8 percent) for 20min under the pressure of 100 MPa; taking out the impregnated wood, and drying at 45 ℃ for 4 hours to obtain first preservative wood;

mixing phenolic resin (viscosity is 105mPa & s, pH value is 10.6, solid content is 42.6%), shell powder (1000 meshes), crab shell powder (1000 meshes) and deionized water to obtain a preparation A; wherein the mass ratio of the phenolic resin to the shell powder to the crab shell powder is 25:18:3, and the mass ratio of the phenolic resin to the ACQ solution is 1.2: 1;

mixing the first preservative wood and the preparation A according to a mass ratio of 1:3, putting the mixture into a plastic bag, vacuumizing the plastic bag until the vacuum degree is-0.1 MPa, carrying out plastic package, soaking the mixture for 1 hour under the condition of 1.2MPa, taking out the soaked wood, and drying the wood at 50 ℃ until the water content is 12%; curing for 25min at 140 ℃ to obtain the preservative wood.

Example 2

Processing moso bamboo into a sample with the thickness of 20 multiplied by 50mm, and drying at 80 ℃ until the water content is 12% to obtain dried bamboo;

dissolving copper nitrate, zinc nitrate, ferric nitrate and manganese nitrate into deionized water according to the mass ratio of 5:3:3:1, wherein the total mass percentage of the copper nitrate, the zinc nitrate, the ferric nitrate and the manganese nitrate in the compound preservative is 5%, and adjusting the pH value of a metal salt solution to 9.5 by using ammonia water to obtain a metal salt solution;

and (2) mixing the dried bamboo wood with a metal salt solution according to the weight ratio of 1:3, soaking in a metal salt solution for 18min under the condition that the pressure is 120 MPa; taking out the impregnated wood, and drying at 55 ℃ for 5 hours to obtain first antiseptic bamboo wood;

mixing phenolic resin (with the viscosity of 110mPa & s, the pH value of 10.5 and the solid content of 41.2%), shell powder (1000 meshes), crab shell powder (1000 meshes) and deionized water to obtain a preparation A; wherein the mass ratio of the phenolic resin to the shell powder to the crab shell powder is 20:15:5, and the phenolic resin accounts for 20% of the mass of the compound preservative; the mass ratio of the phenolic resin to the deionized water is 18: 100, the mass ratio of the phenolic resin to the metal salt solution (total salt) is 10: 3;

mixing the first antiseptic bamboo wood and the preparation B according to the mass ratio of 1:3, putting the mixture into a plastic bag, vacuumizing the plastic bag until the vacuum degree is-0.08 MPa, carrying out plastic package, soaking the mixture for 0.8h under the condition of 1.1MPa, taking out the soaked wood, and drying the wood at 50 ℃ until the water content is about 12%; curing for 25min at 140 ℃ to obtain the anticorrosive bamboo wood.

Example 3

Adding shell powder (1000 meshes) and crab shell powder (1000 meshes) into phenolic resin (with the viscosity of 106mPa & s, the pH value of 9.2 and the solid content of 40.5%) and uniformly stirring to obtain a primary compound preservative; the mass percentage of the phenolic resin in the compound preservative is 25%, and the mass ratio of the phenolic resin, the shell powder and the crab shell powder is 25:18: 3;

mixing the primary compound preservative, the CuAz solution and water to obtain a compound preservative; wherein the mass percentage of copper element in the compound preservative is 1.2%; the mass ratio of the phenolic resin to the CuAz solution is 5: 1.2;

processing masson pine into a sample with the size of 20 multiplied by 50mm, and drying at 80 ℃ until the water content is 12 percent to obtain dried wood;

soaking the dried wood in the compound preservative according to the weight ratio of 1:3, putting the wood into a plastic bag, vacuumizing the plastic bag until the vacuum degree is-0.1 MPa, then carrying out plastic package, and soaking the wood for 1h under the condition that the pressure is 1.2 MPa; and taking out the impregnated wood, drying at 50 ℃ until the water content is 12%, and curing at 135 ℃ for 20min to obtain the preservative wood.

Comparative example 1

Mixing phenolic resin (with the viscosity of 106mPa & s, the pH value of 9.2 and the solid content of 40.5%), CuAz solution, shell powder (1000 meshes) and crab shell powder (1000 meshes) to obtain a compound preservative; the mass percentage of the phenolic resin in the compound preservative is 25%, the mass percentage of the copper element in the compound preservative is 1.2%, and the mass ratio of the phenolic resin to the shell powder to the crab shell powder is 25:18: 3; the mass ratio of the phenolic resin to the CuAz solution is 5: 1.2;

soaking the dried wood in the compound preservative according to the weight ratio of 1:3, putting the wood into a plastic bag, vacuumizing the plastic bag until the vacuum degree is-0.1 MPa, then carrying out plastic package, and soaking the wood for 20min under the condition that the pressure is 1.2 MPa; and taking out the impregnated wood, drying at 50 ℃ until the water content is 12%, and curing at 135 ℃ for 20min to obtain the preservative wood.

The loss rate of the preservative in the preservative bamboo wood or the preservative wood prepared in the examples 1 to 3 and the comparative example 1 was detected according to GB/T29905-2013 Wood preservative loss rate test method, and the results are shown in Table 1.

According to GB/T13942.1-2009 part 1 of durability Performance of wood: the natural corrosion resistance laboratory test method tests the corrosion resistance to detect the corrosion resistance grade and the weight loss rate of the anticorrosive bamboo or wood prepared in examples 1 to 3 and comparative example 1, and the results are shown in table 1.

Table 1 anticorrosive properties of anticorrosive bamboo or wood prepared in examples 1 to 3 and comparative example 1

As can be seen from the data in Table 1, the compound preservative provided by the invention has a good preservative effect and higher fixation performance, and reduces the loss of the preservative in the compound preservative, thereby improving the environmental friendliness.

Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.

Claims

1. A compound preservative comprises the following components in percentage by mass:

2. The compound preservative according to claim 1, wherein the copper-based water-soluble preservative comprises quaternary ammonium copper, copper azole or copper chromium arsenic;

when the preservative is a copper-based water-soluble preservative solution, the mass percentage of the compound preservative is 0.5-1.8% by mass of the copper element.

3. The compound preservative according to claim 1, wherein the pH value of the metal salt solution is 8.5-9.5.

4. The compound preservative according to claim 3, wherein when the preservative is a metal salt solution, the mass percentage of metal salt in the compound preservative is 0.5-5%.

5. The preparation method of the compound preservative of any one of claims 1 to 4 comprises the following steps:

6. A method of anchorage preservation comprising the steps of:

soaking the dried bamboo or wood in a compound preservative, and then curing at high temperature to obtain the preservative bamboo or wood; the compound preservative is the compound preservative disclosed by any one of claims 1-4 or the compound preservative prepared by the preparation method disclosed by claim 5.

7. The preservation method according to claim 6, wherein the impregnation comprises one-step impregnation or two-step impregnation;

the two-step impregnation comprises the following steps:

8. The corrosion prevention method according to claim 7, wherein the first impregnation is ultra-high pressure impregnation, the pressure of the ultra-high pressure impregnation is 90-130 MPa, and the time is 15-25 min;

9. The anticorrosion method according to claim 6, wherein the curing temperature is 130 to 150 ℃ and the curing time is 20 to 40 min.

10. The anticorrosion method according to claim 6, wherein the moisture content of the dried bamboo or wood is 8-15%;