阅读说明：本技术 一种提高硬质木门染色性能的方法 (Method for improving dyeing performance of hard wooden door ) 是由 赵卫 于 2019-10-22 设计创作，主要内容包括：本发明涉及木材加工处理技术领域,公开了一种提高硬质木门染色性能的方法,将制备得到的强化剂添加到染液中,均质处理20-30分钟后即可对硬质木门进行染色处理；所述强化剂乳液能够降低木材与染料接触的表面张力,促进染料快速被纤维素吸收,保持染料的色相,并且染色后具有突出的光稳定性和热稳定性,而且适用于各类染料(包括酸性染料、碱性染料、活性染料等)；其中纳米粒子得以很好的分散开,能够改善硬质木材的湿摩擦牢度,具有极好的耐光牢度、耐升华牢度和耐晒牢度,除此之外,钙基结晶形成的硬化层还能在木质结构表面形成保护,从而提高木材表面的防水性,耐洗刷牢固度高。(The invention relates to the technical field of wood processing treatment, and discloses a method for improving the dyeing performance of a hard wood door, wherein the prepared reinforcer is added into a dye solution, and the hard wood door can be dyed after homogenization treatment for 20-30 minutes; the strengthening agent emulsion can reduce the surface tension of wood and dye contact, promote the dye to be quickly absorbed by cellulose, keep the hue of the dye, has outstanding light stability and thermal stability after dyeing, and is suitable for various dyes (including acid dyes, basic dyes, reactive dyes and the like); wherein the nano particle can fine dispersion, can improve stereoplasm timber's wet rubbing fastness, has fabulous light fastness, resistant sublimation fastness and light fastness, in addition, the sclerosis layer that calcium base crystallization formed can also form the protection on wooden structure surface to improve the waterproof nature on timber surface, the scrubbing resistance fastness is high.)

1. A method for improving dyeing performance of a hard wooden door is characterized in that a prepared reinforcer is added into a dye solution, and the hard wooden door can be dyed after homogenization treatment for 20-30 minutes; the preparation method of the enhancer comprises the following steps:

(1) weighing 7.5-8.0 g of calcium sulfate and 0.5-0.6 g of sodium polyacrylate, placing the calcium sulfate and the sodium polyacrylate in a beaker, adding 70-80 ml of distilled water, magnetically stirring and dispersing for 30-40 minutes, adjusting the pH value of the system to be 8.8-9.0 by using a phosphate buffer solution, adding 0.30-0.35 g of nano silicon dioxide, ultrasonically dispersing for 60-70 minutes, placing the system in a reaction kettle, performing pressurized reaction for 13-15 hours at the reaction temperature of 120-130 ℃, filtering to remove upper clear liquid after the reaction is finished, washing the residual product by using deionized water and absolute ethyl alcohol for 3-5 times respectively, drying the product in a vacuum drying box at the temperature of 80-90 ℃ and grinding the product into powder;

(2) putting a four-neck flask provided with a stirrer, a reflux condenser tube, a thermometer and a dropping funnel into a water bath, weighing 15-18 g of polyvinyl alcohol and 1.4-1.6 g of sodium sulfamate, putting the polyvinyl alcohol and the sodium sulfamate into the four-neck round-bottom flask, adding 10-12 ml of liquid paraffin and 0.8-1.0 g of sodium dodecyl sulfate, slowly adding 55-60 ml of polyethylene glycol aqueous solution while stirring under the heating condition of 65-70 ℃, continuing stirring after the dripping is finished, and controlling the reaction temperature in the flask to be in the range of 70-80 ℃;

(3) and (2) after the reaction is carried out for 40-50 minutes, adding the dry powder product obtained in the step (1), quickly stirring for 10-15 minutes, dropwise adding 0.7-0.8 ml of OP-10 under the protection of nitrogen, cooling the reaction system to 36-40 ℃ after the dropwise adding is finished, stirring for reacting for 40-50 minutes under the protection of nitrogen, naturally cooling to 20-25 ℃ after the reaction is finished, emulsifying the reaction product for 80-90 minutes at 580-600 rpm, and sealing and storing the obtained composite emulsion to obtain the enhancer.

2. The method of claim 1, wherein the amount of enhancer is 0.12-0.14% by weight of the dye solution.

3. The method for improving the dyeing property of the hard wood door according to claim 1, wherein the nano silica in the step (1) has a particle size of 10-20 nm.

4. The method for improving the dyeing property of the hard wood door according to claim 1, wherein the ultrasonic treatment power in the step (1) is 40-45KW, and the temperature is 55-60 ℃.

5. The method for improving the dyeing property of the hard wooden door according to claim 1, wherein the pressure reaction pressure in the reaction kettle in the step (1) is 1.35 to 1.40 MPa.

6. The method for improving the dyeing property of the hard wooden door according to claim 1, wherein the mass concentration of the polyethylene glycol aqueous solution in the step (2) is 30-35%.

7. The method for improving the dyeing property of the hard wood door as claimed in claim 1, wherein the rapid stirring speed in step (3) is 700 and 800 rpm.

Technical Field

The invention belongs to the technical field of wood processing treatment, and particularly relates to a method for improving the dyeing property of a hard wood door.

Background

Due to the advantages of strong plasticity, environmental protection, attractive appearance and the like of the hard wood, the wood door has a broad selection space for consumers in the furniture market, particularly in the selection of necessary wood doors for families, and has various shapes, rich styles, or exquisite European sculptures, or middle classical various-color parquets, or fashionable modern doors with different decorative styles.

The application of wood dyeing technology began in 1913, and since then, many scholars made a lot of researches on the basic theory and technology of wood dyeing, so that the practicality and industrialization of wood dyeing technology were rapidly developed. Wood staining is one aspect of improving the visual properties of wood and is one of the ways to decorate. The wooden door is dyed, so that the modeling and decoration can be enriched, the appearance of a room and the attractiveness of colors are enhanced, the texture of the wooden door can be clearer and more attractive after dyeing treatment, and the decoration effect of the wooden door is enhanced. However, due to the structural characteristics of the hard wood and the additional hydrophobic effect, dye molecules are difficult to dip-dye and color, the color is very unstable, and the color is changed and faded under the influence of illumination and climate. The existing treatment method is to increase the dye consumption, improve the coloring performance of the wood door by vacuum pressurization, microwave treatment and other modes, but the color tone presented after the treatment method is used for dyeing is dark and single, the color is dark, and the aesthetic requirements of consumers on the color are not met.

Disclosure of Invention

The invention aims to solve the existing problems and provides a method for improving the dyeing performance of a hard wooden door, which can prevent hydroxyl in macromolecules of hard wood from being hydrolyzed during dyeing, reduce the repulsion effect of negative charges, reduce the obstruction, improve the fiber affinity, enable dye to permeate into the interior of the wood, promote the dye to be quickly and uniformly dyed and keep the hue of the dye.

The invention is realized by the following technical scheme:

a method for improving dyeing performance of a hard wooden door comprises the steps of adding a prepared enhancer into a dye solution, and carrying out homogenization treatment for 20-30 minutes to obtain a hard wooden door dyeing treatment; the preparation method of the enhancer comprises the following steps:

(1) weighing 7.5-8.0 g of calcium sulfate and 0.5-0.6 g of sodium polyacrylate, placing the calcium sulfate and the sodium polyacrylate in a beaker, adding 70-80 ml of distilled water, magnetically stirring and dispersing for 30-40 minutes, adjusting the pH value of the system to be 8.8-9.0 by using a phosphate buffer solution, adding 0.30-0.35 g of nano silicon dioxide, ultrasonically dispersing for 60-70 minutes, placing the system in a reaction kettle, performing pressurized reaction for 13-15 hours at the reaction temperature of 120-130 ℃, filtering to remove upper clear liquid after the reaction is finished, washing the residual product by using deionized water and absolute ethyl alcohol for 3-5 times respectively, drying the product in a vacuum drying box at the temperature of 80-90 ℃ and grinding the product into powder;

(2) putting a four-neck flask provided with a stirrer, a reflux condenser tube, a thermometer and a dropping funnel into a water bath, weighing 15-18 g of polyvinyl alcohol and 1.4-1.6 g of sodium sulfamate, putting the polyvinyl alcohol and the sodium sulfamate into the four-neck round-bottom flask, adding 10-12 ml of liquid paraffin and 0.8-1.0 g of sodium dodecyl sulfate, slowly adding 55-60 ml of polyethylene glycol aqueous solution while stirring under the heating condition of 65-70 ℃, continuing stirring after the dripping is finished, and controlling the reaction temperature in the flask to be in the range of 70-80 ℃;

(3) and (2) after the reaction is carried out for 40-50 minutes, adding the dry powder product obtained in the step (1), quickly stirring for 10-15 minutes, dropwise adding 0.7-0.8 ml of OP-10 under the protection of nitrogen, cooling the reaction system to 36-40 ℃ after the dropwise adding is finished, stirring for reacting for 40-50 minutes under the protection of nitrogen, naturally cooling to 20-25 ℃ after the reaction is finished, emulsifying the reaction product for 80-90 minutes at 580-600 rpm, and sealing and storing the obtained composite emulsion to obtain the enhancer.

As further described in the scheme, the usage amount of the enhancer accounts for 0.12-0.14% of the mass of the dye liquor.

As a further description of the above scheme, the particle size of the nano-silica in the step (1) is between 10 and 20 nanometers.

As a further description of the above scheme, the ultrasonic treatment power in step (1) is 40-45KW, and the temperature is 55-60 ℃.

As a further description of the scheme, the pressure in the reaction kettle in the step (1) is 1.35-1.40 MPa.

As a further description of the scheme, the mass concentration of the polyethylene glycol aqueous solution in the step (2) is 30-35%.

As a further description of the above scheme, the rapid stirring speed in step (3) is 700-800 rpm.

Compared with the prior art, the invention has the following advantages: in order to solve the problems of poor dyeing performance and improper coloring of the conventional hard wooden door by physical auxiliary means, the invention provides a method for improving the dyeing performance of the hard wooden door, wherein the prepared reinforcer is added into a dye solution, and the hard wooden door can be dyed after homogenization treatment for 20-30 minutes; the strengthening agent emulsion can reduce the surface tension of wood in contact with dye, promote the dye to be quickly absorbed by cellulose, generate the action of dipole force between the dye and main components (cellulose, hemicellulose and lignin) of a wood door, prevent hydroxyl in macromolecules of hard wood from being hydrolyzed during dyeing, reduce the repulsion of negative charges, reduce obstruction, improve fiber affinity, enable the dye to permeate into the wood, promote the dye to be quickly and uniformly colored, keep the hue of the dye, have outstanding light stability and thermal stability after dyeing, and is suitable for various dyes (including acid dyes, basic dyes, reactive dyes and the like); wherein the nano particles can be well dispersed, the wet rubbing fastness of the hard wood can be improved, the hard wood has excellent light fastness, sublimation fastness and light fastness, in addition, a hardening layer formed by calcium-based crystallization can also form protection on the surface of a wood structure, the invention can improve the dye uptake of various dyes to more than 90%, improve the color fastness by 2-3 levels, has less dye consumption, simplifies the process, obviously reduces the cost, has the dye coloring performance which can not be influenced by friction, cleaning and sunshine for a long time, meets various requirements of consumers on colors, provides a new thought for developing various wood door products and decoration styles in the manufacturing industry, expands the application of the dyes in the wood field, and has important theoretical and practical significance for the technical research of hard wood dyeing.

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.