CN112109171A - Preparation process of wicker surface nano-film - Google Patents
Preparation process of wicker surface nano-film Download PDFInfo
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- CN112109171A CN112109171A CN202010909803.4A CN202010909803A CN112109171A CN 112109171 A CN112109171 A CN 112109171A CN 202010909803 A CN202010909803 A CN 202010909803A CN 112109171 A CN112109171 A CN 112109171A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K9/00—Chemical or physical treatment of reed, straw, or similar material
- B27K9/002—Cane, bamboo
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/52—Impregnating agents containing mixtures of inorganic and organic compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
Abstract
The invention discloses a preparation process of a wicker surface nano-film; relates to the technical field of wicker, comprising the following steps: (1) treating wicker; (2) preparing a film covering liquid; (3) the nano film formed on the surface of the wicker by the method has excellent adhesive force, and the wicker is treated by the treatment solution prepared by the method, so that the surface hydrolysis of the wicker can be promoted, more active groups such as hydroxyl groups, carboxyl groups and the like can be formed, the nano film can be better combined with the groups on the surface of the composite nano particles treated by the coupling agent in the film coating solution, the binding force between the formed nano film and the wicker tissue is greatly increased, and the adhesive force of the nano film is further improved.
Description
Technical Field
The invention belongs to the technical field of wicker, and particularly relates to a preparation process of a wicker surface nano-film.
Background
The willow is a kind of willow for producing willow twigs as weaving material. Various living and craft products and small furniture woven by wickers are light and beautiful, and are sold in domestic and foreign markets, thus being important export trade products.
The wicker is soft and easy to bend, uniform in thickness and elegant in color, and various simple, natural, attractive in appearance, light and durable practical artworks can be woven through a novel design. The product comprises the following components: wicker box (bag), meal basket, vegetable basket (round, oval), wicker, needle-line shallow basket, kang mat, reed foil and the like. With the continuous development of the industry and the continuous innovation of products, more novel, practical and beautiful willow products are displayed in front of customers.
However, since wicker is rich in biomass cellulose and the like, particularly in a humid environment, mold is easy to grow, and the mold gradually corrodes the wicker product to cause damage, a certain protection treatment is required to improve the durability of the wicker product.
Disclosure of Invention
The invention aims to provide a wicker surface nano-film preparation process to solve the defects in the prior art.
The technical scheme adopted by the invention is as follows:
a preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 60-70 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the treatment solution prepared by the method can promote the surface of the wicker to hydrolyze, form more active groups such as hydroxyl, carboxyl and the like, and can be better combined with the groups on the surface of the composite nanoparticle treated by the coupling agent in the film coating solution, so that the binding force between the formed nano-film and the wicker tissue is greatly increased, and the adhesive force of the nano-film is improved;
(2) preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and adding sodium silicate, adjusting the temperature to 80-85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20-22 hours, selectively evaporating to constant weight, and then carrying out high-temperature heating treatment for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 40-50min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles; by adopting the coupling agent to treat the composite active nanoparticles, more active groups can be endowed on the surfaces of the composite active nanoparticles, so that chemical bonds can be formed between the composite active nanoparticles and the groups on the surfaces of the wicker, and the adhesive force is improved;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution;
(3) coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 45-50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
The mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 15-20:5-7:5-7: 100.
The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1.
the mixing mass ratio of the treating fluid to the wicker is 3: 1.
The inert gas is helium or neon.
The mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 10-15 g: 400 mL;
the mass fraction of the sodium hydroxide solution is 8.5%.
The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1:45-50, and the rare earth nitrate is cerium nitrate;
the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 15-18.
Adjusting the pH value of the hydrochloric acid solution to be 1.8;
the mass fraction of the hydrochloric acid solution is 0.12%.
The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 8-10:1-1.6: 50;
the mass fraction of the ethanol solution is 45 percent;
the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 50-60 g: 300mL, coupling agent is vinyl tri (beta-methoxyethoxy) silane.
Has the advantages that:
the nano-film formed on the surface of the wicker by the method has excellent adhesive force, and the wicker is treated by the treatment solution prepared by the method, so that the surface hydrolysis of the wicker can be promoted, more active groups such as hydroxyl groups, carboxyl groups and the like can be formed, and the nano-film can be better combined with the groups on the surface of the composite nano-particle treated by the coupling agent in the film coating solution, so that the binding force between the formed nano-film and the wicker tissue is greatly increased, and the adhesive force of the nano-film is further improved.
According to the method, the synergistic effect of the rare earth nitrate and the sodium silicate is added in the preparation of the film coating liquid, so that the bending performance of the treated wicker can be effectively improved, and the surface coating of the wicker is better protected.
Detailed Description
A preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 60-70 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining;
(2) preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and adding sodium silicate, adjusting the temperature to 80-85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20-22 hours, selectively evaporating to constant weight, and then carrying out high-temperature heating treatment for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 40-50min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution;
(3) coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 45-50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
The mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 15-20:5-7:5-7: 100.
The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1.
the mixing mass ratio of the treating fluid to the wicker is 3: 1.
The inert gas is helium or neon.
The mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 10-15 g: 400 mL;
the mass fraction of the sodium hydroxide solution is 8.5%.
The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1:45-50, and the rare earth nitrate is cerium nitrate;
the preparation method of the cerium nitrate comprises the following steps: a nitric acid method: hydrolyzing cerium-rich rare earth hydroxide acidic solution, dissolving with nitric acid, reducing 4-valent cerium into 3-valent cerium in the presence of oxalic acid or hydrogen peroxide, crystallizing, and separating to obtain cerium nitrate finished product;
the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 15-18.
Adjusting the pH value of the hydrochloric acid solution to be 1.8;
the mass fraction of the hydrochloric acid solution is 0.12%.
The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 8-10:1-1.6: 50;
the mass fraction of the ethanol solution is 45 percent;
the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 50-60 g: 300mL, coupling agent is vinyl tri (beta-methoxyethoxy) silane.
Vinyltris (. beta. -methoxyethoxy) silane:
the product is colorless transparent liquid, and is dissolved in various organic solvents.
The vinyl tri (beta-methoxyethoxy) silane has excellent solubility in water due to the ether structure of the beta-methoxyethoxy in the structure;
appearance: a colorless transparent liquid;
molecular weight: 280.4 parts of;
content (%): more than or equal to 97.0;
density (g/ml): 1.033 to 1.035;
refractive index (n D25): 1.4270-1.4285;
boiling point (. degree. C.): 285;
flash point (. degree. C.): 115, 115;
the following will clearly and completely describe the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
A preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 60 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 15:5:5: 100. The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1. the mixing mass ratio of the treating fluid to the wicker is 3: 1. The inert gas is helium or neon.
(2) Preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 80 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 40min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 10 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 45; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 15. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 8:1: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 50 g: 300mL, the rare earth nitrate is cerium nitrate, and the coupling agent is vinyl tri (beta-methoxyethoxy) silane.
(3) Coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 45 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
Example 2
A preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, then heating to 70 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 20:7:7: 100. The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1. the mixing mass ratio of the treating fluid to the wicker is 3: 1. The inert gas is helium or neon.
(2) Preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 22 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 50min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 15 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 50; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 18. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 10:1.6: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 60 g: 300mL, the rare earth nitrate is cerium nitrate, and the coupling agent is vinyl tri (beta-methoxyethoxy) silane.
(3) Coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
Example 3
A preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 65 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 18:6:6: 100. The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1. the mixing mass ratio of the treating fluid to the wicker is 3: 1. The inert gas is helium or neon.
(2) Preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 82 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 21 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 45min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 12 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 48; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 16. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 9:1.2: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 55 g: 300mL, the rare earth nitrate is cerium nitrate, and the coupling agent is vinyl tri (beta-methoxyethoxy) silane.
(3) Coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 48 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
Example 4
A preparation process of a wicker surface nano-film comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 68 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 17:6:6: 100. The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1. the mixing mass ratio of the treating fluid to the wicker is 3: 1. The inert gas is helium or neon.
(2) Preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 40min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 14 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 48; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 16. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 10:1.5: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 52 g: 300mL, the rare earth nitrate is cerium nitrate, and the coupling agent is vinyl tri (beta-methoxyethoxy) silane.
(3) Coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
Test of
The surface example and the comparative example of the same batch of wickers are treated, and the detection is carried out:
testing T-bend according to GB/T13448-2006, wherein the result is represented by the minimum T-bend value of no coating film falling at the bend;
TABLE 1
| T-bend | |
| Example 1 | 2T |
| Example 2 | 2T |
| Example 3 | 2T |
| Example 4 | 2T |
| Comparative example 1 | 1T |
Comparative example 1: the wicker preparation process comprises the following steps:
(1) preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 82 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 21 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 45min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 12 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 48; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 16. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 9:1.2: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 55 g: 300 mL.
(2) Coating treatment:
uniformly coating the prepared film-coating liquid on the surface of the wicker, drying at the constant temperature of 48 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying;
as can be seen from Table 1, the coating formed on the surface of the wicker by the method of the present invention can still maintain relatively complete coating when being subjected to bending treatment, which indicates that the coating formed on the surface of the wicker by the method of the present invention has relatively good bending toughness.
With example 4 as a basic sample, comparing the influence of the addition of rare earth nitrate and sodium silicate on the T-bend test of the coating formed on the surface of the wicker;
TABLE 2
| T-bend | |
| Without addition of rare earth nitrate | 1T |
| Without adding sodium silicate | 1T |
| Without addition of rare earth nitrate and sodium silicate | 0T |
As can be seen from Table 2, the method of the invention can effectively improve the bending performance of the treated wicker and better protect the surface coating of the wicker by the synergistic effect of adding the rare earth nitrate and the sodium silicate in the preparation of the film-coating liquid.
Impact properties:
testing reverse impact according to GB/T13448-2006, and expressing the result by the maximum impact energy of the coating film without falling off;
TABLE 3
| Reverse impact/J | |
| Example 1 | 12.5 |
| Example 2 | 11.8 |
| Example 3 | 13.3 |
| Example 4 | 14.0 |
| Comparative example 2 | 10.5 |
Comparative example 2: a wicker surface film preparation process comprises the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 68 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining; the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 17:6:6: 100. The mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1. the mixing mass ratio of the treating fluid to the wicker is 3: 1. The inert gas is helium or neon.
(2) Preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
uniformly dispersing the composite active nanoparticles into ethanol to obtain a film coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 14 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 48; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 16. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing ratio of the composite active nanoparticles to ethanol is 52 g: 300 mL.
(3) Coating treatment:
uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying;
as can be seen from table 3, the coating layer formed on the surface of the wicker by the method of the present invention has excellent impact resistance, so that the treated wicker can be processed into wicker products, which can better cope with the influence of various external impact forces such as collision and impact, etc., thereby ensuring the service life of the wicker products and better protecting the wicker products.
Adhesion force:
testing the adhesive force according to a grid cutting method in GB/T13448-2006, wherein the grid cutting distance is 1 mm;
TABLE 4
| Adhesion/grade | |
| Example 1 | 0 |
| Example 2 | 0 |
| Example 3 | 0 |
| Example 4 | 0 |
| Comparative example 1 | 2 |
Comparative example 1: comparative example 1: the wicker preparation process comprises the following steps:
(1) preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and then adding sodium silicate, adjusting the temperature to 82 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, then adjusting the pH value through a hydrochloric acid solution, continuing stirring for 21 hours, selectively evaporating to constant weight, and then heating at high temperature for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 45min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution; the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 12 g: 400 mL; the mass fraction of the sodium hydroxide solution is 8.5%. The mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 48; the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 16. Adjusting the pH value of the hydrochloric acid solution to be 1.8; the mass fraction of the hydrochloric acid solution is 0.12%. The mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 9:1.2: 50; the mass fraction of the ethanol solution is 45 percent; the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 55 g: 300 mL.
(2) Coating treatment:
uniformly coating the prepared film-coating liquid on the surface of the wicker, drying at the constant temperature of 48 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying;
as can be seen from Table 4, the nano-film formed on the surface of the wicker by the method has excellent adhesion, and the treatment liquid prepared by the method can promote the surface hydrolysis of the wicker to form more active groups such as hydroxyl groups and carboxyl groups, and can be better combined with the groups on the surface of the composite nano-particles treated by the coupling agent in the film coating liquid, so that the bonding force between the formed nano-film and the wicker tissue is greatly increased, and the adhesion of the nano-film is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention, and the present invention is not limited to the illustrated embodiments, and all the modifications and equivalents of the embodiments may be made without departing from the spirit of the present invention.
Claims (9)
1. A preparation process of a wicker surface nano-film is characterized by comprising the following steps:
(1) treating wicker:
preparing a treatment solution: sequentially adding sodium hydroxide, potassium chloride and sodium citrate into water, and uniformly stirring to obtain a treatment solution;
adding the treatment liquid into a reaction kettle, then adding the wickers to be treated into the treatment liquid, introducing inert gas, discharging air in the reaction kettle, heating to 60-70 ℃, stirring at a rotating speed of 500r/min for 2 hours, standing for 1 hour, taking out, cleaning the surface to be neutral, and naturally draining;
(2) preparing a film coating liquid:
adding titanium dioxide powder into a sodium hydroxide solution, stirring and reacting for 1.5 hours under the nitrogen atmosphere, then adding rare earth nitrate, and adding sodium silicate, adjusting the temperature to 80-85 ℃, stirring for 2 hours at the rotating speed of 500r/min, standing for 1 hour, adjusting the pH value through a hydrochloric acid solution, continuing stirring for 20-22 hours, selectively evaporating to constant weight, and then carrying out high-temperature heating treatment for 40 minutes to obtain composite active nanoparticles;
mixing the composite active nanoparticles, the coupling agent and an ethanol solution together, stirring for reaction for 40-50min, and then carrying out suction filtration to obtain coupling agent-treated composite nanoparticles;
uniformly dispersing the obtained coupling agent-treated composite nanoparticles into ethanol to obtain a membrane coating solution;
(3) coating treatment:
and (3) uniformly coating the prepared film coating liquid on the surface of the wicker treated in the step (1), drying at the constant temperature of 45-50 ℃ for 30min, washing the surface of the wicker with clear water for 30min, and finally drying.
2. The wicker surface nano-film preparation process according to claim 1, which is characterized in that: the mixing weight ratio of the sodium hydroxide, the potassium chloride, the sodium citrate and the water is 15-20:5-7:5-7: 100.
3. The wicker surface nano-film preparation process according to claim 2, wherein: the mixing weight ratio of the potassium chloride to the sodium citrate is 1: 1.
4. the wicker surface nano-film preparation process according to claim 1, which is characterized in that: the mixing mass ratio of the treating fluid to the wicker is 3: 1.
5. The wicker surface nano-film preparation process according to claim 1, which is characterized in that: the inert gas is helium or neon.
6. The wicker surface nano-film preparation process according to claim 1, which is characterized in that: the mixing ratio of the titanium dioxide powder to the sodium hydroxide solution is 10-15 g: 400 mL;
the mass fraction of the sodium hydroxide solution is 8.5%.
7. The wicker surface nano-film preparation process according to claim 6, wherein: the mixing mass ratio of the rare earth nitrate to the sodium silicate is 1: 45-50;
the mass ratio of the sodium silicate to the titanium dioxide powder is 1: 15-18.
8. The wicker surface nano-film preparation process according to claim 1, which is characterized in that: adjusting the pH value of the hydrochloric acid solution to be 1.8;
the mass fraction of the hydrochloric acid solution is 0.12%.
9. The wicker surface nano-film preparation process according to claim 1, which is characterized in that: the mixing weight ratio of the composite active nano particles to the coupling agent to the ethanol solution is 8-10:1-1.6: 50;
the mass fraction of the ethanol solution is 45 percent;
the mixing ratio of the coupling agent treated composite nanoparticles to ethanol is 50-60 g: 300 mL.
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