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Ion chelating wood preservative treatment method based on weak phase structure enhancement

A wood preservative and treatment method technology, applied in wood treatment, wood treatment details, impregnated wood, etc., can solve the problems of short timeliness, easy biodegradation, affecting the timeliness and performance of organic wood preservatives, etc., to achieve low cost and enhanced Chelation and passivation, the effect of delaying decay and failure

Active Publication Date: 2021-12-28
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, recent studies have found that the destructive activities of decaying bacteria on wood are closely related to the diffusion and reduction of trace elements. For example, iron ions have been proven to be the key factor causing wood decay and failure, and also promote the biodegradation of organic preservatives. Water-borne organic wood preservatives have the serious disadvantages of easy biodegradation and failure, which seriously affects the use time and performance of organic wood preservatives. The environmental protection and long-term preservation of wood is still a technical problem in the field of wood protection that has yet to be solved.
Therefore, it is urgent to develop a new type of green wood preservative and a corresponding wood preservative treatment method to effectively reduce or even avoid the occurrence of wood microbial failure behaviors in view of the current technical problems of organic wood preservatives that are easy to biodegrade and have a short time limit. practical necessity

Method used

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  • Ion chelating wood preservative treatment method based on weak phase structure enhancement
  • Ion chelating wood preservative treatment method based on weak phase structure enhancement
  • Ion chelating wood preservative treatment method based on weak phase structure enhancement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Using FeCl 3 ·H 2 O with 20mM Fe 3+ solution; use IDS to prepare 50mM IDS solution; use DTPA to prepare 15mM DTPA solution; use EDTA to prepare 50mM EDTA solution. Take 20mL20mM Fe 3+ solution, add 8mL 50mM EDTA, then add 52mL water, configure Fe 3+ -EDTA (1:1) solution; take 20mL 20mM Fe 3+ solution, add 26.67mL15mM DTPA, then add 33.33mL water, configure Fe 3+ -DTPA (1:1) solution; take 20mL 20mM Fe 3+ solution, add 8mL 50mM IDS, then add 52mL water, configure Fe 3+ - IDS (1:1) solution. Take an appropriate amount of the prepared solution in the electrolytic cup, insert the electrode, and test the redox peak current and point position of the sample solution.

Embodiment 2

[0051] This implementation case involves the preparation and use of an ion-chelating preservative, including: 1 part of 4,5-dichloro-2-n-octyl-3-isothiazolinone EC, 0.1 part of tetrasodium iminodisuccinate Salt, 0.05 part of defoamer, 0.05 part of stabilizer, 0.05 part of penetrant, and the rest is water. The defoamer is polyether; the stabilizer is sodium ethylenediamine tetramethylene phosphonate, sodium thiosulfate, isopropylacrylamide and ethanolamine, among which sodium ethylenediamine tetramethylene phosphonate, sodium thiosulfate, The weight ratio of isopropyl acrylamide and ethanolamine is 20%, 30%, 40%, 10% of the total amount of the stabilizer; the penetrating agent is fatty alcohol polyoxyethylene ether.

[0052] The specific preparation method is as follows: Weigh 11.11g of 4,5-dichloro-2-n-octyl-3-isothiazolinone emulsifiable concentrate and dissolve it in an appropriate amount of water, add stabilizer, penetrant, defoamer, add 1g of iminodisuccinate Acid tetraso...

Embodiment 3

[0057] This implementation case involves the preparation and use of an ion-chelating wood preservative, including: 1 part of 4,5-dichloro-2-n-octyl-3-isothiazolinone EC, 0.1 part of iminodisuccinic acid Tetrasodium salt, 0.05 part of defoamer, 0.05 part of stabilizer, 0.05 part of penetrant, and the rest is water. Defoamer, stabilizer, penetrating agent kind and consumption are identical with embodiment 2.

[0058] The specific preparation method is as follows: Weigh 11.11g of 4,5-dichloro-2-n-octyl-3-isothiazolinone emulsifiable concentrate and dissolve it in an appropriate amount of water, add a stabilizer, penetrant, and defoamer, and add 1g of Tetrasodium succinate, mix well, add water to 2000g, heat to 40°C, stir with a stirrer for 10min at a speed of 200-1000r / min, and obtain the preservative after completion. Put the masson pine wood in the impregnation tank, vacuumize to -0.09MPa for 10-30min, then inject the preservative, pressurize to 0.4-0.5MPa, and hold the pressu...

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Abstract

The invention provides an ion chelating wood preservative treatment method based on weak phase structure enhancement, which comprises the following steps: preparing an ion chelating wood preservative, namely stirring 0.5-1% of an organic bactericide, 0.05-0.1% of a chelating agent, 0.05-0.1% of a stabilizer, 0.05-0.1% of a penetrant, 0.05-0.1% of a defoaming agent and 98.6-99.3% of water in percentage by mass at 40 DEG C to prepare the ion chelating wood preservative, wherein the organic bactericide is an isothiazolinone compound; dipping the prepared ion chelating type wood preservative into the wood under certain pressure and time conditions; and taking the impregnated material out and drying in a drying kiln to obtain the anti-corrosion treatment material. The ion chelating passivation type wood preservative has good stability and permeability, and meanwhile, the dosage of an organic bactericide is small; the wood treated by the ion chelating passivation type wood preservative has good corrosion resistance and loss resistance, and the failure behavior of a wood weak phase structure can be effectively reduced or even avoided; the method can effectively cooperate with various wood preservative treatment processes, is simple to operate and low in cost, and can be implemented and popularized.

Description

technical field [0001] The invention relates to the technical field of wood protection, in particular to an ion chelating wood antiseptic treatment method based on weak phase structure reinforcement. Background technique [0002] Wood is a natural biomass material composed of cellulose, hemicellulose, lignin and low-molecular carbohydrates. It is widely used in construction, furniture, flooring, etc. because of its high strength-to-weight ratio and recyclability. field. However, when wood is used outdoors, chemical components such as hemicellulose and low-molecular carbohydrates in wood are the weak phase structure of wood, which are most vulnerable to degradation and degradation due to the attack of microorganisms (such as decay fungi, molds, etc.). invalidated. The destruction and failure of the weak phase structure are the key factors that cause the overall appearance and mechanical properties of decayed wood to decline, which seriously reduces the use value of wood pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/08B27K3/52
CPCB27K3/08B27K3/52B27K2240/20
Inventor 朱愿李贤军郝晓峰李伟吴献章孟德森周梦佳
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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