A process for preparing high-purity zinc oxide with antibacterial properties

Abstract

The invention discloses a process for preparing high-purity zinc oxide with antibacterial properties, and relates to the technical field of zinc oxide preparation. The process comprises the following steps: S1, raw material preparation and dissolution: prepare high-purity zinc salt and water, put the zinc salt into a reaction box, dissolve the zinc salt in water by heating and stirring the reaction box, and adjust the pH value to generate a zinc hydroxide precursor; S2, synthesize zinc oxide: convert zinc hydroxide into zinc oxide by a hydrothermal method or a solvent thermal method, control the temperature, time and pH value of the reaction, and obtain zinc oxide with higher purity; S3, high-temperature roasting: put the synthesized zinc oxide into a muffle furnace for high-temperature roasting to remove residual moisture and organic matter, and improve the purity of zinc oxide; S4, enhance antibacterial properties. The invention realizes rapid and uniform dissolution of zinc salt and improves the preparation efficiency of zinc oxide by using the triple effects of grinding, stirring and gas assistance through the cooperation of grinding components and auxiliary components.

Description

Technical Field

[0001] The invention relates to the technical field of zinc oxide preparation, in particular to a process for preparing high-purity zinc oxide with antibacterial properties. Background Art

[0002] Nano zinc oxide refers to zinc oxide particles with a grain size of less than 100 nanometers. As a high-performance semiconductor material, nano zinc oxide has many special properties, such as non-toxicity and non-migration, fluorescence, piezoelectricity, and the ability to absorb and scatter ultraviolet rays, due to its unique small size effect, surface effect, quantum size effect, macroscopic quantum tunneling effect and dielectric confinement effect. Therefore, it has a very broad application prospect in the fields of antibacterial materials, luminescent materials, piezoelectric materials, ultraviolet shielding materials, self-cleaning materials, cell calibration materials and nanocatalysts.

[0003] In the process of preparing zinc oxide, the raw materials need to be prepared first. Currently, most of the raw materials used are zinc salts and water. The zinc solution is obtained by dissolving the zinc salt in water, and then the pH value is adjusted and alkaline solutions such as ammonia water or sodium hydroxide are added to promote zinc precipitation to form a zinc hydroxide precursor. In the process of dissolving the zinc salt in water, since the zinc salt is granular and has different sizes, and the contact efficiency between the zinc salt and water is low, when the zinc salt with larger particles comes into contact with water, the dissolution rate of the zinc salt is slower, which greatly affects the preparation of zinc oxide. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a process for preparing high-purity zinc oxide with antibacterial properties, which solves the problems mentioned in the above background technology.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: A process for preparing high-purity zinc oxide with antibacterial properties comprises the following steps: S1. Raw material preparation and dissolution: prepare high-purity zinc salt and water, put the zinc salt into a reaction box, dissolve the zinc salt in water by heating and stirring the reaction box, and adjust the pH value to generate a zinc hydroxide precursor; S2. Synthesizing zinc oxide: converting zinc hydroxide into zinc oxide by hydrothermal or solvothermal method, controlling the temperature, time and pH value of the reaction, to obtain zinc oxide with higher purity; S3, high temperature calcination: the synthesized zinc oxide is placed in a muffle furnace for high temperature calcination to remove residual moisture and organic matter and improve the purity of the zinc oxide; S4. Enhanced antibacterial properties: Improve the antibacterial effect of zinc oxide through surface treatment; S5, post-treatment: washing, filtering and drying to remove impurities and moisture to ensure the purity of zinc oxide; The reaction box in S1 comprises a box body, the interior of the box body is divided into a grinding groove and a reaction chamber, the front and rear inner sides of the grinding groove are provided with annular grooves, the left and right inner sides of the grinding groove are provided with connecting grooves, a grinding assembly is provided inside the grinding groove, and zinc salt with larger particles is ground by the grinding assembly, and a heating strip is provided on the inner side of the reaction chamber; The box body is provided with an auxiliary component, through which the zinc salt in the reaction chamber is quickly dissolved in water.

[0006] Preferably, the grinding assembly includes a bracket plate fixedly mounted on the box body, a motor is fixedly mounted on the bracket plate, a driving shaft is fixedly mounted on the output end of the motor, a connecting roller is fixedly mounted on the driving shaft, a mounting plate and a semi-cylinder are fixedly mounted on the connecting roller, an electric push rod is fixedly mounted on the mounting plate, and a pushing plate is fixedly mounted on the output shaft of the electric push rod.

[0007] Preferably, a grinding roller is rotatably mounted inside the semi-cylinder, mounting shafts are fixedly mounted on both ends of the grinding roller, a pinion is fixedly mounted on the mounting shaft, and an annular gear set is arranged inside the annular groove.

[0008] Preferably, the connecting roller is located inside the grinding groove, the mounting plate is symmetrically arranged with the semi-cylinder, the end of the mounting shaft away from the grinding roller extends to the inside of the annular groove, and the pinion gear is meshed with the annular gear set.

[0009] Preferably, the auxiliary component includes a downward pressure cam fixedly mounted on the driving shaft, a horizontal plate fixedly mounted on the box body, a T-shaped rod fixedly mounted on the upper end surface of the horizontal plate, a lifting plate slidably mounted on the T-shaped rod, and two compression springs, a left tooth plate and a right tooth plate fixedly mounted on the lower end surface of the lifting plate.

[0010] Preferably, symmetrically arranged stirring rods are rotatably mounted inside the reaction chamber, a left gear and a right gear are fixedly mounted on the ends of the two stirring rods respectively, and stirring blades are fixedly mounted on the two stirring rods.

[0011] Preferably, one end of the compression spring away from the lifting plate is fixedly connected to the upper end surface of the horizontal plate, the compression spring is located on the outside of the T-bar, the bottom ends of the left tooth plate and the right tooth plate both pass through the horizontal plate, and are respectively meshed with the left gear and the right gear, the left tooth plate and the right gear are located between two compression springs, the left gear and the right gear are located on the outside of the box, and the stirring blade is located inside the reaction chamber.

[0012] Preferably, an air cylinder is fixedly installed on the lower end surface of the horizontal plate, a downward pressure rod is fixedly installed on the air cylinder, the air outlet of the air cylinder is fixedly connected to a diverter pipe, the end of the diverter pipe away from the air cylinder is fixedly connected to a hose, a discharge pipe is rotatably installed inside the reaction chamber, a plurality of exhaust pipes are fixedly installed on the side end surface of the discharge pipe, a connecting pipe is fixedly connected to the side end surface of the discharge pipe, and an air inlet pipe is fixedly connected to the side end surface of the air cylinder.

[0013] Preferably, a connecting shaft is fixedly installed on the left gear and the right gear, a push plate is rotatably installed on the connecting shaft, a stabilizing block is fixedly installed on the box body, a U-shaped plate is slidably installed on the stabilizing block, an L-shaped tooth plate is fixedly installed on the U-shaped plate, and a gear ring is fixedly installed on the discharge pipe.

[0014] Preferably, one end of the pressure rod away from the inflation cylinder is fixedly connected to the lifting plate, one end of the diversion tube away from the inflation cylinder extends to the interior of the reaction chamber, one end of the hose away from the diversion tube is fixedly connected to the connecting tube, one end of the push plate away from the connecting shaft is rotatably connected to the end of the U-shaped plate, and the L-shaped tooth plate is meshed with the gear ring.

[0015] The present invention provides a process for preparing high-purity zinc oxide with antibacterial properties. Compared with the prior art, it has the following beneficial effects: 1. The present invention puts the zinc salt to be used into the inner bottom of the grinding tank, and then drives the connecting roller on the driving shaft to rotate through the motor, and uses the grinding roller on the connecting roller to squeeze and grind the zinc salt. At the same time, the connecting roller rotates around the driving shaft, and the grinding roller cooperates with the annular gear set in the annular groove through the small gear on the mounting shaft, so that the grinding roller is in a rotating state. The grinding effect of the grinding roller on the zinc salt is enhanced by the opposite rotation of the grinding roller and the connecting roller. When the connecting roller rotates a certain angle, the pushing plate on the connecting roller is used to discharge the zinc salt in the grinding tank into the reaction chamber through the connecting groove, so that the zinc salt is quickly dissolved in water, and the efficiency of zinc oxide preparation is effectively improved; 2. In the present invention, when the driving shaft rotates, the pressing cam is synchronously driven to rotate. The pressing cam and the lifting plate are matched, and the lifting plate and the compression spring are matched, so that the lifting plate can be lifted and lowered reciprocatingly on the T-bar. The left tooth plate and the right tooth plate on the lifting plate can drive the stirring blades on the stirring rod to rotate in the reaction chamber through the matching of the left gear and the right gear. The opposite rotation of the two stirring rods increases the contact area between the zinc salt and the water, promotes the dissolution reaction, and ensures that the zinc salt is quickly and evenly dissolved in the water. 3. In the present invention, when the lifting plate reciprocates and rises and falls, it will synchronously drive the piston on the lower pressure rod to move in the inflation cylinder, and the gas in the inflation cylinder will enter the hose through the shunt pipe, and the gas in the hose will enter the exhaust pipe, and the gas in the exhaust pipe will intermittently enter the reaction chamber through the exhaust pipe. By filling the water with gas, the formation of bubbles can be utilized to increase the gas-liquid interface in the water, which helps the zinc salt particles to better contact the water molecules, thereby accelerating the dissolution; 4. In the present invention, when the left gear and the right gear rotate, the U-shaped plate on the plate will be driven to move through the connecting shaft, and the U-shaped plate will then be limited by the stabilizing block to achieve horizontal reciprocating movement, and then the L-shaped tooth plate and the gear ring on the U-shaped plate will cooperate to make the exhaust pipe in a reciprocating rotation state, thereby enhancing the uniformity of bubble distribution in the reaction chamber, further improving the dissolution of zinc salt, and accelerating the preparation of zinc oxide. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ; Figure 2 is a side sectional view of the present invention; Figure 3 It is a schematic diagram of the structure of the grinding assembly in the present invention; Figure 4 It is a schematic diagram of the structure of the auxiliary components in the present invention; Figure 5 It is a structural schematic diagram of the pressing cam in the present invention; Figure 6 It is a structural schematic diagram of the U-shaped plate in the present invention; Figure 7 for Figure 6 The enlarged view of point A in the middle; Figure 8 It is a cross-sectional view of the box body in the present invention.

[0017] In the figure: 1, box body; 2, grinding groove; 3, reaction chamber; 4, annular groove; 5, connecting groove; 6, heating strip; 7, bracket plate; 8, motor; 9, drive shaft; 10, connecting roller; 11, mounting plate; 12, semi-cylinder; 13, electric push rod; 14, push plate; 15, grinding roller; 16, mounting shaft; 17, pinion; 18, annular gear set; 19, pressing cam; 20, horizontal plate; 21, T-bar; 22, lifting plate ; 23. Compression spring; 24. Left tooth plate; 25. Right tooth plate; 26. Stirring rod; 27. Left gear; 28. Right gear; 29. ​​Stirring blade; 30. Inflator; 31. Down pressure rod; 32. Diverter pipe; 33. Hose; 34. Discharge pipe; 35. Exhaust pipe; 36. Connecting pipe; 37. Intake pipe; 38. Connecting shaft; 39. Push plate; 40. Stabilizing block; 41. U-shaped plate; 42. L-shaped tooth plate; 43. Gear ring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-8 The present invention is a process for preparing high-purity zinc oxide with antibacterial properties, comprising the following steps: S1. Raw material preparation and dissolution: prepare high-purity zinc salt and water, put the zinc salt into a reaction box, dissolve the zinc salt in water by heating and stirring the reaction box, and adjust the pH value to generate a zinc hydroxide precursor; S2. Synthesizing zinc oxide: converting zinc hydroxide into zinc oxide by hydrothermal or solvothermal method, controlling the temperature, time and pH value of the reaction, to obtain zinc oxide with higher purity; S3, high temperature calcination: the synthesized zinc oxide is placed in a muffle furnace for high temperature calcination to remove residual moisture and organic matter and improve the purity of the zinc oxide; S4. Enhanced antibacterial properties: Improve the antibacterial effect of zinc oxide through surface treatment; S5, post-treatment: washing, filtering and drying to remove impurities and moisture to ensure the purity of zinc oxide; The reaction box in S1 includes a box body 1, the interior of the box body 1 is divided into a grinding groove 2 and a reaction chamber 3, an annular groove 4 is provided on the front and rear inner sides of the grinding groove 2, a connecting groove 5 is provided on the left and right inner sides of the grinding groove 2, a grinding assembly is provided inside the grinding groove 2, and zinc salt with larger particles is ground by the grinding assembly, a heating strip 6 is provided on the inner side of the reaction chamber 3, wherein the number of the heating strips 6 is multiple, and the heating strips 6 are used to accelerate the mixing of the zinc salt and water, wherein the connecting groove 5 is an inclined surface, ensuring that the zinc salt after grinding can enter the reaction chamber 3, a discharge pipe is provided at the inner bottom of the box body 1, and a valve is provided on the discharge pipe, and four legs are fixedly installed on the lower end surface of the box body 1 to ensure the stability of the box body 1; The grinding assembly includes a bracket plate 7 fixedly mounted on the box body 1, a motor 8 is fixedly mounted on the bracket plate 7, a driving shaft 9 is fixedly mounted on the output end of the motor 8, a connecting roller 10 is fixedly mounted on the driving shaft 9, a mounting plate 11 and a semi-cylinder 12 are fixedly mounted on the connecting roller 10, an electric push rod 13 is fixedly mounted on the mounting plate 11, a pushing plate 14 is fixedly mounted on the output shaft of the electric push rod 13, a grinding roller 15 is rotatably mounted inside the semi-cylinder 12, mounting shafts 16 are fixedly mounted at both ends of the grinding roller 15, a pinion 17 is fixedly mounted on the mounting shaft 16, an annular gear set 18 is arranged inside the annular groove 4, the connecting roller 10 is located inside the grinding groove 2, the mounting plate 11 and the semi-cylinder 12 are symmetrically arranged, one end of the mounting shaft 16 away from the grinding roller 15 extends to the inside of the annular groove 4, the pinion 17 is meshed with the annular gear set 18, wherein a sealing ring is arranged between the driving shaft 9 and the box body 1 to ensure the sealing of the reaction chamber 3.

[0020] In this embodiment, the zinc salt to be used is placed in the inner bottom of the grinding tank 2, and then the connecting roller 10 on the driving shaft 9 is driven to rotate by the motor 8, and the grinding roller 15 on the connecting roller 10 is used to extrude and grind the zinc salt. At the same time, the connecting roller 10 rotates around the driving shaft 9, and the grinding roller 15 cooperates with the annular gear set 18 in the annular groove 4 through the pinion 17 on the mounting shaft 16, so that the grinding roller 15 is in a rotating state, and the grinding effect of the grinding roller 15 on the zinc salt is enhanced by the opposite rotation of the grinding roller 15 and the connecting roller 10. When the connecting roller 10 rotates a certain angle, the pushing plate 14 on the connecting roller 10 is used to discharge the zinc salt in the grinding tank 2 into the reaction chamber 3 through the connecting groove 5, so that the zinc salt is quickly dissolved in water, effectively improving the efficiency of zinc oxide preparation.

[0021] The housing 1 is provided with an auxiliary component, through which the zinc salt in the reaction chamber 3 is quickly dissolved in the water. The auxiliary component includes a downward pressing cam 19 fixedly mounted on the driving shaft 9, a horizontal plate 20 fixedly mounted on the housing 1, a T-shaped rod 21 fixedly mounted on the upper end surface of the horizontal plate 20, a lifting plate 22 slidably mounted on the T-shaped rod 21, two compression springs 23, a left tooth plate 24 and a right tooth plate 25 fixedly mounted on the lower end surface of the lifting plate 22, a symmetrically arranged stirring rod 26 is rotatably mounted inside the reaction chamber 3, a left gear 27 and a right gear 28 are fixedly mounted on the ends of the two stirring rods 26, stirring blades 29 are fixedly mounted on the two stirring rods 26, and one end of the compression spring 23 away from the lifting plate 22 is fixed. Connected to the upper end surface of the cross plate 20, the position of the compression spring 23 is on the outside of the T-bar 21, the bottom ends of the left tooth plate 24 and the right tooth plate 25 both pass through the cross plate 20, and are respectively meshed with the left gear 27 and the right gear 28, the left tooth plate 24 and the right tooth plate 25 are between the two compression springs 23, the left gear 27 and the right gear 28 are on the outside of the box body 1, and the stirring blade 29 is inside the reaction chamber 3, wherein a rotating wheel is rotatably installed on the pressing cam 19, and the friction between the pressing cam 19 and the surface of the lifting plate 22 is reduced by the rotating wheel, wherein the left tooth plate 24 and the right tooth plate 25 are both slidably installed with the cross plate 20, and the position of the lifting plate 22 is ensured by the T-bar 21 to ensure that the lifting plate 22 will not fall off.

[0022] In this embodiment, when the driving shaft 9 rotates, the pressing cam 19 is synchronously driven to rotate. The pressing cam 19 cooperates with the lifting plate 22, and the lifting plate 22 cooperates with the compression spring 23, so that the lifting plate 22 can be lifted and lowered reciprocatingly on the T-bar 21. The left tooth plate 24 and the right tooth plate 25 on the lifting plate 22 cooperate with the left gear 27 and the right gear 28, thereby driving the stirring blade 29 on the stirring rod 26 to rotate in the reaction chamber 3. The opposite rotation of the two stirring rods 26 increases the contact area between the zinc salt and the water, promotes the dissolution reaction, and ensures that the zinc salt is quickly and evenly dissolved in the water.

[0023] An inflatable cylinder 30 is fixedly installed on the lower end surface of the cross plate 20, a lower pressure rod 31 is fixedly installed on the inflatable cylinder 30, a shunt pipe 32 is fixedly connected to the air outlet of the inflatable cylinder 30, and a hose 33 is fixedly connected to the end of the shunt pipe 32 away from the inflatable cylinder 30, a discharge pipe 34 is rotatably installed inside the reaction chamber 3, a plurality of exhaust pipes 35 are fixedly installed on the side end surface of the discharge pipe 34, a connecting pipe 36 is fixedly connected to the side end surface of the discharge pipe 34, an air inlet pipe 37 is fixedly connected to the side end surface of the inflatable cylinder 30, a connecting shaft 38 is fixedly installed on the left gear 27 and the right gear 28, a pushing plate 39 is rotatably installed on the connecting shaft 38, a stabilizing block 40 is fixedly installed on the box body 1, a U-shaped plate 41 is slidably installed on the stabilizing block 40, an L-shaped tooth plate 42 is fixedly installed on the U-shaped plate 41, and a discharge pipe 34 is fixedly installed on the discharge pipe 34. It is equipped with a gear ring 43, and the end of the lower pressure rod 31 away from the inflation cylinder 30 is fixedly connected to the lifting plate 22, and the end of the shunt pipe 32 away from the inflation cylinder 30 extends to the interior of the reaction chamber 3, and the end of the hose 33 away from the shunt pipe 32 is fixedly connected to the connecting pipe 36, and the end of the push plate 39 away from the connecting shaft 38 is rotatably connected to the end of the U-shaped plate 41, and the L-shaped gear plate 42 is meshed with the gear ring 43, wherein the intake pipe 37, the shunt pipe 32 and the exhaust pipe 35 are all provided with a one-way valve, and the bottom end of the lower pressure rod 31 is fixedly installed with a piston, and the principle of the inflation cylinder 30 is the same as the principle of the air pump in the prior art. Since the piston, the air pump and the one-way valve are all technologies well known to people in this field, they are not described in detail here. The top end of the lower pressure rod 31 passes through the horizontal plate 20 and is slidably installed with the horizontal plate 20.

[0024] In this embodiment, when the lifting plate 22 is lifted and lowered back and forth, the piston on the pressing rod 31 is synchronously driven to move in the inflation cylinder 30, and the gas in the inflation cylinder 30 enters the hose 33 through the shunt pipe 32, and the gas in the hose 33 enters the exhaust pipe 35, and the gas in the exhaust pipe 35 intermittently enters the reaction chamber 3 through the exhaust pipe 35. By filling the water with gas, the formation of bubbles can be utilized to increase the gas-liquid interface in the water, which helps the zinc salt particles to better contact the water molecules, thereby accelerating the dissolution. When the left gear 27 and the right gear 28 rotate, the U-shaped plate 41 on the push plate 39 is driven to move through the connecting shaft 38, and the U-shaped plate 41 is then limited by the stabilizing block 40 to achieve horizontal reciprocating movement, and then the L-shaped tooth plate 42 on the U-shaped plate 41 cooperates with the tooth ring 43, so that the exhaust pipe 35 is in a reciprocating rotation state, thereby enhancing the uniformity of the distribution of bubbles in the reaction chamber 3, further improving the dissolution of the zinc salt, and accelerating the preparation of zinc oxide.

[0025] Working principle: When in use, the zinc salt to be used is placed in the inner bottom of the grinding tank 2, and then the motor 8 drives the connecting roller 10 on the driving shaft 9 to rotate, and the grinding roller 15 on the connecting roller 10 is used to squeeze and grind the zinc salt. At the same time, the connecting roller 10 rotates around the driving shaft 9, and the grinding roller 15 cooperates with the annular gear set 18 in the annular groove 4 through the pinion 17 on the mounting shaft 16, so that the grinding roller 15 is in a rotating state. The grinding roller 15 and the connecting roller 10 rotate in opposite directions to enhance the grinding effect of the grinding roller 15 on the zinc salt. When the connecting roller 10 rotates a certain angle, the pushing plate 14 on the connecting roller 10 is used to discharge the zinc salt in the grinding tank 2 into the reaction chamber 3 through the connecting groove 5, so that the zinc salt is quickly dissolved in water; When the driving shaft 9 rotates, the pressing cam 19 is synchronously driven to rotate. The pressing cam 19 and the lifting plate 22 are matched, and the lifting plate 22 and the compression spring 23 are matched, so that the lifting plate 22 can be lifted and lowered on the T-shaped rod 21. The left tooth plate 24 and the right tooth plate 25 on the lifting plate 22 can cooperate with the left gear 27 and the right gear 28, thereby driving the stirring blade 29 on the stirring rod 26 to rotate in the reaction chamber 3. The opposite rotation of the two stirring rods 26 increases the contact area between the zinc salt and the water, promotes the dissolution reaction, and ensures that the zinc salt is quickly and evenly dissolved in the water. When the lifting plate 22 is lifted and lowered back and forth, the piston on the pressing rod 31 is synchronously driven to move in the gas cylinder 30. The gas in the gas cylinder 30 enters the hose 33 through the shunt pipe 32. The gas in the hose 33 enters the exhaust pipe 35. The gas in the exhaust pipe 35 intermittently enters the reaction chamber 3 through the exhaust pipe 35. Filling the water with gas can facilitate the formation of bubbles and increase the gas-liquid interface in the water, which helps the zinc salt particles to better contact the water molecules, thereby accelerating the dissolution. When the left gear 27 and the right gear 28 rotate, the U-shaped plate 41 on the push plate 39 is driven to move through the connecting shaft 38, and the U-shaped plate 41 is limited by the stabilizing block 40 to achieve horizontal reciprocating movement, and then the L-shaped toothed plate 42 on the U-shaped plate 41 cooperates with the toothed ring 43, so that the exhaust pipe 35 is in a reciprocating rotation state, thereby enhancing the uniformity of the distribution of bubbles in the reaction chamber 3. At the same time, the heating strip 6 is used to heat the water in the reaction chamber 3, and the mixing of the zinc salt and the water is improved by heating the water.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A process for preparing high-purity zinc oxide with antibacterial properties, characterized in that: The following steps are involved: S1. Raw material preparation and dissolution: prepare high-purity zinc salt and water, put the zinc salt into a reaction box, dissolve the zinc salt in water by heating and stirring the reaction box, and adjust the pH value to generate a zinc hydroxide precursor; S2. Synthesizing zinc oxide: converting zinc hydroxide into zinc oxide by hydrothermal or solvothermal method, controlling the temperature, time and pH value of the reaction, to obtain zinc oxide with higher purity; S3, high temperature calcination: the synthesized zinc oxide is placed in a muffle furnace for high temperature calcination to remove residual moisture and organic matter and improve the purity of the zinc oxide; S4. Enhanced antibacterial properties: Improve the antibacterial effect of zinc oxide through surface treatment; S5, post-treatment: washing, filtering and drying to remove impurities and moisture to ensure the purity of zinc oxide; The reaction box in S1 comprises a box body (1), the interior of the box body (1) is divided into a grinding groove (2) and a reaction chamber (3), the front and rear inner sides of the grinding groove (2) are both provided with annular grooves (4), the left and right inner sides of the grinding groove (2) are provided with connecting grooves (5), a grinding assembly is provided inside the grinding groove (2), zinc salt with larger particles is ground by the grinding assembly, and a heating strip (6) is provided on the inner side of the reaction chamber (3); The box body (1) is provided with an auxiliary component, through which the zinc salt in the reaction chamber (3) is quickly dissolved in water.

2. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 1, characterized in that: The grinding assembly comprises a support plate (7) fixedly mounted on a box body (1), a motor (8) fixedly mounted on the support plate (7), a drive shaft (9) fixedly mounted on the output end of the motor (8), a connecting roller (10) fixedly mounted on the drive shaft (9), a mounting plate (11) and a semi-cylinder (12) fixedly mounted on the connecting roller (10), an electric push rod (13) fixedly mounted on the mounting plate (11), and a push plate (14) fixedly mounted on the output shaft of the electric push rod (13).

3. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 2, characterized in that: A grinding roller (15) is rotatably mounted inside the semi-cylinder (12), mounting shafts (16) are fixedly mounted at both ends of the grinding roller (15), a pinion (17) is fixedly mounted on the mounting shaft (16), and an annular gear set (18) is provided inside the annular groove (4).

4. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 3, characterized in that: The connecting roller (10) is located inside the grinding groove (2), the mounting plate (11) and the semi-cylinder (12) are arranged symmetrically, the end of the mounting shaft (16) away from the grinding roller (15) extends to the inside of the annular groove (4), and the pinion (17) is meshed with the annular gear set (18).

5. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 2, characterized in that: The auxiliary component comprises a downward pressing cam (19) fixedly mounted on the driving shaft (9); a horizontal plate (20) fixedly mounted on the box body (1); a T-shaped rod (21) fixedly mounted on the upper end surface of the horizontal plate (20); a lifting plate (22) slidably mounted on the T-shaped rod (21); and two compression springs (23), a left tooth plate (24) and a right tooth plate (25) fixedly mounted on the lower end surface of the lifting plate (22).

6. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 5, characterized in that: Symmetrically arranged stirring rods (26) are rotatably mounted inside the reaction chamber (3), a left gear (27) and a right gear (28) are fixedly mounted on the ends of the two stirring rods (26), and stirring blades (29) are fixedly mounted on the two stirring rods (26).

7. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 6, characterized in that: One end of the compression spring (23) away from the lifting plate (22) is fixedly connected to the upper end surface of the horizontal plate (20), and the position of the compression spring (23) is located outside the T-shaped rod (21). The bottom ends of the left tooth plate (24) and the right tooth plate (25) pass through the horizontal plate (20) and are respectively meshed with the left gear (27) and the right gear (28). The left tooth plate (24) and the right gear (25) are located between the two compression springs (23), the left gear (27) and the right gear (28) are located outside the box body (1), and the stirring blade (29) is located inside the reaction chamber (3).

8. The process for preparing high-purity zinc oxide with antibacterial properties according to claim 6, characterized in that: An inflating cylinder (30) is fixedly mounted on the lower end surface of the transverse plate (20), a lower pressure rod (31) is fixedly mounted on the inflating cylinder (30), an air outlet of the inflating cylinder (30) is fixedly connected to a shunt pipe (32), an end of the shunt pipe (32) away from the inflating cylinder (30) is fixedly connected to a hose (33), an exhaust pipe (34) is rotatably mounted inside the reaction chamber (3), a plurality of exhaust pipes (35) are fixedly mounted on the side end surface of the exhaust pipe (34), a connecting pipe (36) is fixedly connected to the side end surface of the exhaust pipe (34), and an air inlet pipe (37) is fixedly connected to the side end surface of the inflating cylinder (30).

9. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 8, characterized in that: A connecting shaft (38) is fixedly mounted on the left gear (27) and the right gear (28), a pushing plate (39) is rotatably mounted on the connecting shaft (38), a stabilizing block (40) is fixedly mounted on the box body (1), a U-shaped plate (41) is slidably mounted on the stabilizing block (40), an L-shaped toothed plate (42) is fixedly mounted on the U-shaped plate (41), and a toothed ring (43) is fixedly mounted on the discharge pipe (34).

10. A process for preparing high-purity zinc oxide with antibacterial properties according to claim 9, characterized in that: One end of the push rod (31) away from the gas cylinder (30) is fixedly connected to the lifting plate (22), one end of the shunt tube (32) away from the gas cylinder (30) extends to the interior of the reaction chamber (3), one end of the hose (33) away from the shunt tube (32) is fixedly connected to the connecting tube (36), one end of the push plate (39) away from the connecting shaft (38) is rotatably connected to the end of the U-shaped plate (41), and the L-shaped tooth plate (42) is meshed with the tooth ring (43).

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