CN110128921B - Nano aluminum alloy surface treatment agent and preparation process thereof - Google Patents

Abstract

The invention discloses a nano aluminum alloy surface treating agent which is prepared from the following raw materials in parts by weight: 35-60 parts of dolomite adhesive, 55-70 parts of modified alkyd resin, 15-25 parts of nano silicon dioxide, 3-8 parts of coupling agent, 5-8 parts of stabilizer, 5-15 parts of dodecyl mercaptan, 10-18 parts of sodium lauryl sulfate and 50-75 parts of deionized water; the invention also discloses a preparation method of the nano aluminum alloy surface treating agent, which is characterized in that the nano aluminum alloy surface treating agent is prepared from the spine marble glue, the modified alkyd resin and the nano silicon dioxide; the garrulous stone glue added in the preparation process can improve the adhesive capacity of the surface treating agent and the surface of the aluminum alloy to form a protective film layer, and alkyd resin is modified in the preparation process, so that the prepared protective film layer has good chemical stability and wear resistance and is not easily damaged by the external environment, and the nano silicon dioxide can improve the self-cleaning performance of the protective film layer.

Description

Nano aluminum alloy surface treatment agent and preparation process thereof

Technical Field

The invention belongs to the field of surface treating agent preparation, and particularly relates to a nano aluminum alloy surface treating agent and a preparation process thereof.

Background

There are many methods for surface treatment of aluminum alloys, such as physical, chemical, physicochemical and synthetic methods. The prior common method is an anodic oxidation method, a conversion film is formed on the surface of the aluminum alloy by an electrochemical method, although the method can improve the nano performance of the aluminum alloy, the method has poor environment adaptation capability, the conversion film layer is not uniform enough and is easy to fall off, the wear resistance is not improved, the traditional phosphate conversion and chromate passivation surface treatment technology can obtain good effect, but the waste liquid discharged in the treatment process contains heavy metal ions such as zinc, manganese, nickel and chromium and carcinogenic substances such as sub-nano substances, the environmental pollution is very serious, the metal surface silanization treatment technology does not relate to substances harmful to the environment, the energy consumption of the production process is low, the technical application field is wide, the metal surface silanization technology is expected to replace the phosphate conversion treatment and the chromate passivation treatment, and the method is the latest development direction for independently protecting the metal surface.

Chinese invention patent CN2014102768631 discloses a nano aluminum alloy surface treating agent, which consists of A, B two components, wherein the component A comprises the following components: 0.3-0.7 parts of fenugreek gum, 1-2 parts of polyepoxysuccinic acid, 1-2 parts of dimercaptopropane sodium sulfonate, 0.1-0.2 part of 2-thiol benzimidazole, 1-2 parts of sodium gluconate, 2-4 parts of bis (gamma-triethoxysilylpropyl) tetrasulfide and 46-50 parts of deionized water; the component B comprises 0.1-0.2 part of titanium nitride powder, 1-2 parts of nano calcium phosphate, 2-3 parts of phosphoric acid, 3-5 parts of tetramethylammonium nitrate, 0.2-0.4 part of nano talcum powder, 0.05-0.1 part of dicumyl peroxide, 3-4 parts of film-forming additive, KH56010-14 parts of silane coupling agent and 78-90 parts of deionized water. However, the prepared surface treating agent conversion film layer is not uniform enough, and the wear resistance is not strong enough.

Disclosure of Invention

In order to overcome the technical problems, the invention provides a nano aluminum alloy surface treating agent and a preparation process thereof. A nano aluminum alloy surface treating agent is prepared through the spine marble adhesive, the modified alkyd resin and the nano silicon dioxide, the adhesive capacity of the surface treating agent and the surface of an aluminum alloy can be improved through the spine marble adhesive added in the preparation process, a protective film layer is formed, the alkyd resin is modified in the preparation process, the prepared protective film layer has good chemical stability and wear resistance and is not easily damaged by the external environment, and the self-cleaning performance of the protective film layer can be improved through the nano silicon dioxide.

The purpose of the invention can be realized by the following technical scheme:

a nano aluminum alloy surface treating agent is prepared from the following raw materials in parts by weight: 35-60 parts of dolomite adhesive, 55-70 parts of modified alkyd resin, 15-25 parts of nano silicon dioxide, 3-8 parts of coupling agent, 5-8 parts of stabilizer, 5-15 parts of dodecyl mercaptan, 10-18 parts of sodium lauryl sulfate and 50-75 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic stirring for 30min, adding a 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding a coupling agent, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding a stabilizer, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Further, the modified alkyd resin is prepared by the following steps:

(1) adding 8g of phenylacetic acid, 3mL of linoleic acid and 1g of phthalic anhydride into a four-neck flask containing 60mL of dimethylbenzene, heating in a water bath at 45 ℃, uniformly stirring for 20min, adding 10g of glutaric anhydride, stirring for 5min, adding 20mL of dimethylethanolamine, heating to 75 ℃, and uniformly stirring for 10 min;

(2) transferring the mixture to a vacuum reaction kettle with the vacuum degree of-0.10 MPa, heating to 150 ℃, preserving heat for 2 hours, observing the water yield of the reaction kettle, heating at the speed of 15 ℃/h until the water yield is stable until the temperature reaches 300 ℃, preserving heat at the temperature, detecting the esterification degree, cooling until the acid value is reduced to 30 ℃ after the detected acid value is 18mgKOH/g, and vacuumizing the backflow xylene to prepare alkyd resin;

(3) transferring the alkyd resin into a beaker, adding deionized water, heating to 80 ℃, magnetically stirring at the rotating speed of 180r/min for 30min, adding sodium persulfate, stirring for 5min, adding methyltriethoxysilane, reacting at the secondary temperature for 2h, stopping heating, standing for 45min, filtering to obtain the modified alkyd resin, and controlling the weight ratio of the alkyd resin to the sodium persulfate to the methyltriethoxysilane to be 5: 1: 3.

According to the invention, the alkyd resin is prepared from phenylacetic acid, linoleic acid and phthalic anhydride, the alkyd resin has a main chain with strong polarity and a non-polar side chain, so that the alkyd resin has good wettability and adhesion property, but ester bonds in the alkyd resin are easy to break, so that the stability of the prepared aluminum alloy surface treating agent is poor, the alkyd resin is modified by using methyltriethoxysilane as a monomer, the modified alkyd resin contains carbon-silicon bonds, and the bond energy of the carbon-silicon bonds is greater than that of carbon-carbon bonds, so that the modified alkyd resin has more stable performance, and the stability of the alkyd resin is further improved by greatly reducing hydroxyl groups in the modified alkyd resin.

Further, the coupling agent is one or more of KH550, KH560 and KH 792.

Further, the stabilizer is one or more of aluminum stearate, potassium stearate and magnesium stearate.

A preparation method of a nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic stirring for 30min, adding a 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding a coupling agent, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding a stabilizer, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Further, the operation of the dispersing device in step S3 is as follows:

switch on, first motor drives control mechanism and operates, pneumatic cylinder and hydraulic pump begin to operate, the hydraulic pump inhales fluid from the hydraulic oil tank, make the hydraulic stem top can reciprocate, it reciprocates to drive the roof, the puddler is installed at the roof lower surface with directional guide arm, begin to reciprocate along with the hydraulic stem, the second motor begins to operate, it carries out work to drive dispersion mechanism, the puddler begins to rotate, it rotates to drive the dispersion wheel, when the puddler gets into mixed liquid with the dispersion wheel, can reciprocate in mixed liquid through the drive of hydraulic stem and disperse.

The invention has the beneficial effects that:

(1) according to the invention, the nano aluminum alloy surface treating agent is prepared from the garcinia glue, the modified alkyd resin and the nano silicon dioxide, the adhesive capacity of the surface treating agent and the surface of the aluminum alloy can be improved through the garcinia glue added in the preparation process, so as to form a protective film layer, the alkyd resin is modified in the preparation process, so that the prepared protective film layer has good chemical stability and wear resistance and is not easy to be damaged by the external environment, and the self-cleaning performance of the protective film layer can be improved through the nano silicon dioxide;

(2) the dispersing device is a full-automatic hydraulic dispersing device, the top end of a hydraulic rod can stretch up and down, so that the top of the machine can move up and down, the dispersing mechanism can move up and down in the dispersing process, the dispersing wheels can better disperse, the dispersing effect is more uniform, and the arrangement of the directional guide rod can enhance the moving accuracy and avoid damage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a dispersing apparatus according to the present invention;

FIG. 2 is an enlarged view of the hydraulic pump of FIG. 1;

FIG. 3 is a front view of FIG. 1;

in the figure: 1. a frame mechanism; 11. a set top; 12. a hydraulic rod retainer ring; 13. a base; 14. a hydraulic lever; 2. a dispersing mechanism; 21. a stirring rod; 22. a dispersing wheel; 23. a directional guide rod; 24. a fixing bolt; 3. a control mechanism; 31. a hydraulic cylinder; 32. a hydraulic pump; 321. a pressure gauge; 322. a micro power supply; 323. a hydraulic pump body; 324. a connecting pipe; 325. an overflow valve; 326. a conductive tube; 327. an overflow pipe; 33. a first motor; 34. a second motor; 35. and a hydraulic oil tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to 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 of the 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 nano aluminum alloy surface treating agent is prepared from the following raw materials in parts by weight: 35 parts of gambiered rock gum, 55 parts of modified alkyd resin, 15 parts of nano silicon dioxide, 3 parts of KH550, 5 parts of potassium stearate, 5 parts of dodecyl mercaptan, 10 parts of sodium lauryl sulfate and 50 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, controlling the rotating speed of a dispersing machine to be 800r/min, and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent;

the modified alkyd resin is prepared by the following steps:

(1) adding 8g of phenylacetic acid, 3mL of linoleic acid and 1g of phthalic anhydride into a four-neck flask containing 60mL of dimethylbenzene, heating in a water bath at 45 ℃, uniformly stirring for 20min, adding 10g of glutaric anhydride, stirring for 5min, adding 20mL of dimethylethanolamine, heating to 75 ℃, and uniformly stirring for 10 min;

(2) transferring the mixture to a vacuum reaction kettle with the vacuum degree of-0.10 MPa, heating to 150 ℃, preserving heat for 2 hours, observing the water yield of the reaction kettle, heating at the speed of 15 ℃/h until the water yield is stable until the temperature reaches 300 ℃, preserving heat at the temperature, detecting the esterification degree, cooling until the acid value is reduced to 30 ℃ after the detected acid value is 18mgKOH/g, and vacuumizing the backflow xylene to prepare alkyd resin;

(3) transferring the alkyd resin into a beaker, adding deionized water, heating to 80 ℃, magnetically stirring at the rotating speed of 180r/min for 30min, adding sodium persulfate, stirring for 5min, adding methyltriethoxysilane, reacting at the secondary temperature for 2h, stopping heating, standing for 45min, filtering to obtain the modified alkyd resin, and controlling the weight ratio of the alkyd resin to the sodium persulfate to the methyltriethoxysilane to be 5: 1: 3.

Example 2

A nano aluminum alloy surface treating agent is prepared from the following raw materials in parts by weight: 40 parts of gambiered plant gum, 60 parts of modified alkyd resin, 18 parts of nano silicon dioxide, 5 parts of KH550, 6 parts of potassium stearate, 8 parts of dodecyl mercaptan, 12 parts of sodium lauryl sulfate and 55 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Example 3

A nano aluminum alloy surface treating agent is prepared from the following raw materials in parts by weight: 55 parts of gambiered rock gum, 65 parts of modified alkyd resin, 20 parts of nano silicon dioxide, 6 parts of KH550, 6 parts of potassium stearate, 12 parts of dodecyl mercaptan, 15 parts of sodium lauryl sulfate and 65 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Example 4

A nano aluminum alloy surface treating agent is prepared from the following raw materials in parts by weight: 60 parts of gambiered rock gum, 70 parts of modified alkyd resin, 25 parts of nano silicon dioxide, 8 parts of KH550, 8 parts of potassium stearate, 15 parts of dodecyl mercaptan, 18 parts of sodium lauryl sulfate and 75 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Comparative example 1

Compared with example 1, the alkyd resin of this comparative example is not modified, and the preparation method is as follows:

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Comparative example 2

Compared with the example 1, the preparation method of the comparative example is as follows without adding nano silicon dioxide:

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the cnidium monnieri gum and the alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to serve as liquid A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic force, stirring for 30min, adding 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding KH550, stirring at a constant speed for 10min, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding potassium stearate, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

Comparative example 3

The comparative example is an aluminum alloy surface treatment agent in the market.

The nano aluminum alloy surface treating agents prepared in examples 1 to 4 and comparative examples 1 to 3 were coated on the aluminum alloy surface and then tested for adhesion, sealing property, and thickness, and the results are shown in table 1 below;

adhesion force: detecting the adhesive force of a film formed after the treating agent is coated on the surface of the aluminum alloy by adopting a grid-scribing tape pasting method;

sealing property: the sealing performance of a film formed after the treating agent is coated on the surface of the aluminum alloy is checked through a salt spray test;

TABLE 1

It can be seen from table 1 above that the damaged areas of examples 1-4 were 2.6-3.5% of the lattice area in the adhesion test, and the damaged areas of comparative examples 1-3 were 3.6-4.8% of the lattice area; films formed after the films of examples 1 to 4 and comparative example 2 are coated on the surface of the aluminum alloy do not foam or peel in a sealing performance test, and foaming phenomena occur in comparative examples 1 and 3; the thickness of examples 1-4 is between 125-136 μm, and the thickness of comparative examples 1-3 is between 120-157 μm; therefore, the nano aluminum alloy surface treating agent prepared by the invention has good adhesion performance and sealing performance and can perform better protection effect on aluminum alloy.

Referring to fig. 1-3, the dispersing device in step S3 includes a frame mechanism 1, a dispersing mechanism 2, and a control mechanism 3, wherein the dispersing mechanism 2 is fixed on the lower surface of the top end of the frame mechanism 1, and the control mechanism 3 is installed on the upper surface of the bottom end of the frame mechanism 1;

as shown in fig. 1, the frame mechanism 1 includes a top 11, a hydraulic rod retainer ring 12, a base 13, and a hydraulic rod 14, the hydraulic rod 14 is fixed on the lower surface of the top end of the top 11, the top end of the hydraulic rod 14 is connected to the top 11, the bottom end of the hydraulic rod 14 is fixed on the upper surface of the base 13, and the hydraulic rod retainer ring 12 is fixed on the upper end of the hydraulic rod 14;

as shown in fig. 1, the dispersing mechanism 2 includes a stirring rod 21, a dispersing wheel 22, an orientation guide rod 23, and a fixing bolt 24, the stirring rod 21 is fixed on the lower surface of the top end of the machine top 11, one end of the stirring rod 21 is connected with the machine top 11, the dispersing wheel 22 is fixed on the other end of the stirring rod 21, the orientation guide rod 23 is installed on the lower surface of the top end of the machine top 11 in parallel with the stirring rod 21, and the orientation guide rod 23 is fixed on the hydraulic rod 14 through the fixing bolt 24;

as shown in fig. 1 and 2, the control mechanism 3 includes a hydraulic cylinder 31, a hydraulic pump 32, a first motor 33, a second motor 34, a hydraulic oil tank 35, and the hydraulic oil tank 35 fixed on the upper surface of the base 13, the hydraulic cylinder 31, the hydraulic pump 32, and the first motor 33 are installed on the upper surface of the hydraulic oil tank 35, the second motor 34 is installed on the lower surface of the roof 11, the hydraulic pump 32 includes a pressure gauge 321, a micro power supply 322, a hydraulic pump body 323, a connecting pipe 324, an overflow valve 325, a conductive pipe 326, and an overflow pipe 327, the micro power supply 322 is fixed on the top end of the hydraulic pump body 323, the connecting pipe 324 is installed on the side surface of the hydraulic pump body 323, one end of the connecting pipe 324 is connected to the hydraulic pump body 323, the other end of the connecting pipe 324 is connected to the hydraulic oil tank 35, the overflow valve 325 is connected to the side surface of the hydraulic pump body 323, the pressure gauge 321 is installed on the top end of the overflow valve 325, one end of the conductive pipe 326 is connected to the side surface of the micro power supply 322, the other end of the conductive pipe 326 is connected with the hydraulic oil tank 35, the overflow pipe 327 is fixed on the side surface of the hydraulic pump body 323, and the height of the overflow pipe 327 is consistent with that of the overflow valve 325.

The working process is as follows: the power is switched on, the first motor 33 drives the control mechanism 3 to operate, the hydraulic cylinder 31 and the hydraulic pump 32 start to operate, the hydraulic pump 32 sucks oil from the hydraulic oil tank 35 to form pressure oil to be discharged to provide power for the hydraulic rod 14, so that the top end of the hydraulic rod 14 can move up and down to drive the top 11 to move up and down, the stirring rod 21 and the directional guide rod 23 are installed on the lower surface of the top and start to move up and down along with the hydraulic rod 14, the second motor 34 starts to operate to drive the dispersing mechanism 2 to operate, the stirring rod 21 starts to rotate to drive the dispersing wheel 22 to rotate, when the stirring rod 21 and the dispersing wheel 22 enter mixed liquid, the mixed liquid can move up and down to disperse in the mixed liquid through the driving of the hydraulic rod 14, the dispersing effect of the mixed liquid is improved, and the dispersing process is stable.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.

Claims (2)

1. The nano aluminum alloy surface treating agent is characterized by being prepared from the following raw materials in parts by weight: 35-60 parts of Caesalpinia spinosa gum, 55-70 parts of modified alkyd resin, 15-25 parts of nano silicon dioxide, 3-8 parts of coupling agent, 5-8 parts of stabilizer, 5-15 parts of dodecyl mercaptan, 10-18 parts of sodium lauryl sulfate and 50-75 parts of deionized water;

the preparation method of the nano aluminum alloy surface treating agent comprises the following steps:

step S1, adding the Caesalpinia spinosa Gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to obtain solution A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic stirring for 30min, adding a 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding a coupling agent, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding a stabilizer, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, controlling the rotating speed of a dispersing machine to be 800r/min, and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent;

step S3, the dispersing device comprises a rack mechanism (1), a dispersing mechanism (2) and a control mechanism (3), wherein the dispersing mechanism (2) is fixed on the lower surface of the top end of the rack mechanism (1), and the control mechanism (3) is installed on the upper surface of the bottom end of the rack mechanism (1);

the rack mechanism (1) comprises a machine top (11), a hydraulic rod check ring (12), a base (13) and a hydraulic rod (14), wherein the hydraulic rod (14) is fixed on the lower surface of the top end of the machine top (11), the top end of the hydraulic rod (14) is connected with the machine top (11), the bottom end of the hydraulic rod (14) is fixed on the upper surface of the base (13), and the hydraulic rod check ring (12) is fixed on the upper end of the hydraulic rod (14);

the dispersing mechanism (2) comprises a stirring rod (21), a dispersing wheel (22), an orientation guide rod (23) and a fixing bolt (24), the stirring rod (21) is fixed on the lower surface of the top end of the machine top (11), one end of the stirring rod (21) is connected with the machine top (11), the dispersing wheel (22) is fixed at the other end of the stirring rod (21), the orientation guide rod (23) and the stirring rod (21) are installed on the lower surface of the top end of the machine top (11) in parallel, and the orientation guide rod (23) is fixed on the hydraulic rod (14) through the fixing bolt (24);

the control mechanism (3) comprises a hydraulic cylinder (31), a hydraulic pump (32), a first motor (33), a second motor (34), a hydraulic oil tank (35), the hydraulic oil tank (35) is fixed on the upper surface of the base (13), the hydraulic cylinder (31), the hydraulic pump (32), the first motor (33) is installed on the upper surface of the hydraulic oil tank (35), the second motor (34) is installed on the lower surface of the roof (11), the hydraulic pump (32) comprises a pressure gauge (321), a micro power supply (322), a hydraulic pump body (323), a connecting pipe (324), an overflow valve (325), a conducting pipe (326) and an overflow pipe (327), the micro power supply (322) is fixed at the top end of the hydraulic pump body (323), the connecting pipe (324) is installed on the side surface of the hydraulic pump body (323), one end of the connecting pipe (324) is connected with the hydraulic pump body (323), the other end of the connecting pipe (324) is connected with the hydraulic oil tank (35), the overflow valve (325) is connected to the other side surface of the hydraulic pump body (323), the pressure gauge (321) is installed at the top end of the overflow valve (325), one end of the conductive pipe (326) is connected with the side surface of the micro power supply (322), the other end of the conductive pipe (326) is connected with the hydraulic oil tank (35), the overflow pipe (327) is fixed to the side surface of the hydraulic pump body (323), and the overflow pipe (327) and the overflow valve (325) are consistent in height;

the dispersion device in step S3 operates as follows:

the power supply is switched on, the first motor (33) drives the control mechanism (3) to operate, the hydraulic cylinder (31) and the hydraulic pump (32) start to operate, the hydraulic pump (32) sucks oil from the hydraulic oil tank (35), so that the top end of the hydraulic rod (14) moves up and down and drives the top (11) to move up and down, the stirring rod (21) and the directional guide rod (23) are installed on the lower surface of the top and start to move up and down along with the hydraulic rod (14), the second motor (34) starts to operate and drives the dispersing mechanism (2) to work, the stirring rod (21) starts to rotate and drives the dispersing wheel (22) to rotate, and when the stirring rod (21) and the dispersing wheel (22) enter mixed liquid, the stirring rod (21) and the dispersing wheel (22) can move up and down in the mixed liquid under the driving of the hydraulic rod (14);

the modified alkyd resin is prepared by the following steps:

(1) adding 8g of phenylacetic acid, 3mL of linoleic acid and 1g of phthalic anhydride into a four-neck flask containing 60mL of dimethylbenzene, heating in a water bath at 45 ℃, uniformly stirring for 20min, adding 10g of glutaric anhydride, stirring for 5min, adding 20mL of dimethylethanolamine, heating to 75 ℃, and uniformly stirring for 10 min;

(2) transferring the mixture to a vacuum reaction kettle with the vacuum degree of-0.10 MPa, heating to 150 ℃, preserving heat for 2 hours, observing the water yield of the reaction kettle, heating at the speed of 15 ℃/h until the water yield is stable until the temperature reaches 300 ℃, preserving heat at the temperature, detecting the esterification degree, cooling until the acid value is reduced to 30 ℃ after the detected acid value is 18mgKOH/g, and vacuumizing the backflow xylene to prepare alkyd resin;

(3) transferring alkyd resin into a beaker, adding deionized water, heating to 80 ℃, magnetically stirring at the rotating speed of 180r/min for 30min, adding sodium persulfate, stirring for 5min, adding methyltriethoxysilane, reacting at the temperature for 2h, stopping heating, standing for 45min, and filtering to obtain modified alkyd resin, wherein the weight ratio of the alkyd resin to the sodium persulfate to the methyltriethoxysilane is controlled to be 5: 1: 3;

the coupling agent is one or more of KH550, KH560 and KH 792;

the stabilizer is one or more of aluminum stearate, potassium stearate and magnesium stearate.

2. The preparation method of the nano aluminum alloy surface treatment agent according to claim 1, characterized by comprising the following steps:

step S1, adding the Caesalpinia spinosa Gum and the modified alkyd resin into a beaker filled with half of deionized water, heating in a water bath at 55 ℃, stirring at a constant speed for 20min, adding dodecyl mercaptan, heating to 60 ℃, and stirring for 5min to obtain solution A for later use;

step S2, adding sodium lauryl sulfate into a three-neck flask, adding the other half of deionized water, heating in a water bath at 60 ℃, adding magnetic stirring for 30min, adding a 10% sodium hydroxide solution to adjust the pH until the pH of the solution is 9, heating to 75 ℃, adding a coupling agent, stirring at a constant speed for 10min, adding nano-silica, stirring at a rotating speed of 350r/min, and stirring for 15min to obtain a mixed solution as solution B;

and step S3, pouring the solution A into the solution B, stirring at a constant speed for 5min, adding a stabilizer, heating to 75 ℃, reacting at the temperature for 2h to obtain a mixed solution, performing ultrasonic treatment for 30min, dispersing the mixed solution by using a dispersing device, and controlling the rotating speed of a dispersing machine to be 800r/min and the dispersing time to be 2h to obtain the nano aluminum alloy surface treating agent.

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