阅读说明：本技术 一种户外木质家具的后加工处理工艺 (Post-processing treatment process for outdoor wooden furniture ) 是由 李明 焦目东 李彪 蒋英坝 于 2020-04-20 设计创作，主要内容包括：本发明涉及一种户外木质家具的后加工处理工艺,以制备得到的硅溶胶与硼酸溶液、聚乙二醇水溶液、硬脂酸醇溶液按照质量比为4.5-5.5:1.0-1.2：3.0-3.5:2.0-2.5的比例混合制备得到后处理剂用于木质家具进行高温高压浸渍后加工处理,使其表面形成防护薄膜,得到具有耐光老化以及疏水性能的自然表面,加压浸渍效果好,可长久保持木质家具原有的品位。(The invention relates to an after-processing treatment process of outdoor wooden furniture, which comprises the following steps of mixing prepared silica sol, boric acid solution, polyethylene glycol aqueous solution and stearic acid alcoholic solution according to the mass ratio of 4.5-5.5: 1.0-1.2: the post-treatment agent prepared by mixing the components in a ratio of 3.0-3.5:2.0-2.5 is used for carrying out high-temperature and high-pressure impregnation post-processing treatment on the wooden furniture to form a protective film on the surface of the wooden furniture, so that a natural surface with light aging resistance and hydrophobic property is obtained, the pressure impregnation effect is good, and the original taste of the wooden furniture can be kept for a long time.)

1. The post-processing treatment process of the outdoor wooden furniture is characterized by comprising the following steps of:

(1) measuring 18-20 ml of ethyl orthosilicate at 22-25 ℃, putting the ethyl orthosilicate into a beaker, slowly adding the ethyl orthosilicate into 25-30 ml of absolute ethyl alcohol under stirring to prepare a solution A, measuring 4.5-5.5 ml of glacial acetic acid, 1.7-2.0 ml of azodicarbonamide and 20-25 ml of absolute ethyl alcohol, mixing the mixture, dropwise adding a nitric acid solution after uniformly stirring to adjust the pH value of a system to be 4.0-4.5, carrying out water bath heating reaction under stirring, wherein the water bath reaction temperature is 40-50 ℃, and the reaction time is 2-4 hours to obtain silica sol;

(2) mixing the silica sol prepared in the step (1) with a boric acid solution, a polyethylene glycol aqueous solution and a stearic acid alcoholic solution according to a mass ratio of 4.5-5.5: 1.0-1.2: 3.0-3.5:2.0-2.5, stirring for 20-30 minutes, then high-speed shearing at 3000-3500 rpm for 15-25 minutes, and then carrying out ultrasonic treatment for 10-15 minutes, wherein the ultrasonic treatment is stopped for 15-20 seconds every 1.0-1.5 minutes to obtain the post-treatment agent;

(3) drying wooden furniture to constant weight, placing in an impregnation tank, vacuumizing for 20-30 minutes, sucking the prepared post-treatment agent under vacuum condition, keeping the vacuum for 10-15 minutes, adopting a high-temperature high-pressure impregnation method, keeping the pressure at 0.70-0.80MPa, the temperature at 78-85 ℃, impregnating for 2.5-3.0 hours, placing at-15 ℃ for freeze drying for 2-3 hours after impregnation, placing at 20-25 ℃ for 10-12 hours at room temperature, and finally heating to 90-96 ℃ at the speed of 1.3-1.5 ℃/minute for drying.

2. The post-processing treatment process for outdoor wooden furniture according to claim 1, wherein the molar concentration of the nitric acid solution in the step (1) is 7.0-7.8 mol/l.

3. The post-processing treatment process of outdoor wooden furniture according to claim 1, wherein the mass concentration of the boric acid solution in the step (2) is 4.0-4.2%.

4. The post-processing treatment process of outdoor wooden furniture according to claim 1, wherein the polyethylene glycol aqueous solution in the step (2) is prepared from polyethylene glycol with the molecular weight of 6000 and water according to the mass ratio of 1: 25-30.

5. The post-processing treatment process of outdoor wooden furniture according to claim 1, wherein the stearic acid alcohol solution in the step (2) is prepared from stearic acid and ethanol according to a mass ratio of 1: 14-16.

6. The post-processing treatment process for outdoor wooden furniture according to claim 1, wherein the amount of the post-processing agent in the step (3) is 1.5 to 1.8 g/m in relation to the surface area of the wooden furniture.

Technical Field

The invention relates to the technical field of outdoor furniture post-processing, in particular to a post-processing technology of outdoor wooden furniture.

Background

The solid wood furniture is divided into beech, teak, maple, oak, toon, ash, elm, poplar, pine and the like according to the wood, wherein the beech, teak and toon are the most famous and precious. The development situation of the operation of the solid wood furniture industry in China is good at present, and the research center of the research on the data shows that the operation of the solid wood furniture industry in China will meet a new development opportunity along with the continuous expansion of the operation and market demand of the solid wood furniture industry in China.

With the improvement of living standard and the development of economic standard of people, outdoor furniture as a popular living mode occupies a bigger and bigger market. However, wooden furniture is inevitably subjected to the sun and rain during outdoor use, and the service life of the wooden furniture is far shorter than that of outdoor furniture made of other materials.

The existing method for improving the use performance of outdoor wooden furniture adopts a mode of spraying paint on the surface, which improves the outdoor service life of the wooden furniture to a certain extent, but the use of the coating brings discordance to the wooden furniture, and the surface coating can be gradually peeled off along with the passage of time, so that the attractiveness of the outdoor wooden furniture is influenced, and at present, no better solution is available.

Disclosure of Invention

Aiming at the existing problems, the invention aims to provide a post-processing treatment process of outdoor wooden furniture, which is used for carrying out post-processing treatment on the wooden furniture to form a protective film on the surface of the wooden furniture so as to obtain a natural surface with light aging resistance and hydrophobic property. The method is realized by the following technical scheme:

a post-processing treatment process of outdoor wooden furniture comprises the following steps:

(1) measuring 18-20 ml of ethyl orthosilicate at 22-25 ℃, putting the ethyl orthosilicate into a beaker, slowly adding the ethyl orthosilicate into 25-30 ml of absolute ethyl alcohol under stirring to prepare a solution A, measuring 4.5-5.5 ml of glacial acetic acid, 1.7-2.0 ml of azodicarbonamide and 20-25 ml of absolute ethyl alcohol, mixing the mixture, dropwise adding a nitric acid solution after uniformly stirring to adjust the pH value of a system to be 4.0-4.5, carrying out water bath heating reaction under stirring, wherein the water bath reaction temperature is 40-50 ℃, and the reaction time is 2-4 hours to obtain silica sol;

(2) mixing the prepared silica sol with boric acid solution, polyethylene glycol aqueous solution and stearic acid alcoholic solution according to the mass ratio of 4.5-5.5: 1.0-1.2: 3.0-3.5:2.0-2.5, stirring for 20-30 minutes, then high-speed shearing at 3000-3500 rpm for 15-25 minutes, and then carrying out ultrasonic treatment for 10-15 minutes, wherein the ultrasonic treatment is stopped for 15-20 seconds every 1.0-1.5 minutes to obtain the post-treatment agent; the boric acid solution has a mass concentration of 4.0-4.2%, the polyethylene glycol aqueous solution is prepared from polyethylene glycol with a molecular weight of 6000 and water according to a mass ratio of 1:25-30, and the stearic acid alcohol solution is prepared from stearic acid and ethanol according to a mass ratio of 1: 14-16;

(3) drying wooden furniture to constant weight, placing in an impregnation tank, vacuumizing for 20-30 minutes, sucking the prepared post-treatment agent under vacuum condition, keeping the vacuum for 10-15 minutes, adopting a high-temperature high-pressure impregnation method, keeping the pressure at 0.70-0.80MPa, the temperature at 78-85 ℃, impregnating for 2.5-3.0 hours, placing at-15 ℃ for freeze drying for 2-3 hours after impregnation, placing at 20-25 ℃ for 10-12 hours at room temperature, and finally heating to 90-96 ℃ at the speed of 1.3-1.5 ℃/minute for drying.

Further, the molar concentration of the nitric acid solution in the step (1) is 7.0-7.8 mol/L

Further, the relationship between the dosage of the post-treatment agent in the step (3) and the surface area of the wooden furniture is 1.5 to 1.8 grams per square decimeter.

Further, the residual post-treatment liquid after the high-temperature and high-pressure dipping treatment in the step (3) can be recycled.

Compared with the prior art, the invention has the following advantages: in order to solve the problems in the existing protective coating of outdoor wooden furniture, the invention provides a post-processing treatment process of the outdoor wooden furniture, wherein the post-processing treatment process comprises the following steps of mixing the prepared silica sol, boric acid solution, polyethylene glycol aqueous solution and stearic acid alcoholic solution according to the mass ratio of 4.5-5.5: 1.0-1.2: 3.0-3.5:2.0-2.5, the post-treatment agent is prepared by mixing the components in a ratio of 2.0-2.5, and is used for post-processing treatment of wooden furniture, so that a protective film is formed on the surface of the wooden furniture, a natural surface with light aging resistance and hydrophobic property is obtained, the pressure impregnation effect is good, and the long-acting ultraviolet light aging resistance and corrosion prevention effects can be achieved; the practical significance of improving the functionality of outdoor wooden furniture products and improving the market competitiveness can be realized, the rapid development and the resource sustainable development of modern outdoor wooden furniture are remarkably promoted, and the method is a technical scheme which is extremely worthy of popularization and use.

Detailed Description

In order to make the objects, technical solutions and effects of the present invention clearer and clearer, the present invention is further described with reference to specific embodiments, and it should be understood that the specific embodiments described herein are only used for explaining the present invention and are not used for limiting the technical solutions provided by the present invention.