Double-sided seal piston degradable polymer dispenser and preparation method thereof

Abstract

This invention relates to a piston-type double-sided sealed biodegradable polymer dispenser and its preparation method, addressing the technical problems of insufficient sealing performance between the pump body and piston in existing similar products, and the need for improvements in the preparation method to extend the service life of the duckbill. The key features are: the piston's outer diameter has raised sealing surfaces at both the top and bottom edges, which simultaneously seal against the conical inner wall surface above the through hole in the pump body's inner diameter; a connecting seat extending into the pump body is fastened and fixed to the conical inner wall surface above the piston; a barbed post is provided below the outlet hole of the duckbill, and the duckbill base is snapped and hidden to the barbed post at the bottom of the duckbill; an extension nozzle is provided at the bottom of the duckbill base, one end of which is hinged and fastened to the duckbill base; a liquid guide groove is provided on one side of the bottom of the extension nozzle, opening below the outlet hole on the duckbill; simultaneously, one end of the extension nozzle is fastened and fixed to the ball head groove of the duckbill base via an interference fit with a ball head; and a liquid collection groove is provided on the other side of the top of the extension nozzle.

Description

Technical Field

[0001] This invention relates to cosmetic dispensers, specifically a piston-type double-sided sealed biodegradable polymer dispenser and its preparation method. Background Technology

[0002] Dispensers vary in structure and can be categorized as sprayers, emulsion pumps, foam pumps, and vacuum bottles. Emulsion bottles are micro-sprayers used for storing and dispensing emulsions, particularly cosmetic emulsions. They typically consist of an outer casing, a head cap, a pump core, a large ring, and a bottle body. The pump head generally refers to the main body omitting the bottle body. Examples include Chinese patent application number 201610284316.7, published on July 27, 2016, entitled "Rotary Lock External Spring Dispenser"; and Chinese patent application number 201711032265X, published on March 20, 2018, entitled "Environmentally Friendly High-Rigidity Polymer External Spring Liquid Dispenser and its Preparation Method." However, the pump body and piston structure design of these products and similar products are suboptimal, making it difficult to achieve enhanced sealing during the pressing process, collect leaks and drips, and extend the lifespan of the nozzle. Summary of the Invention

[0003] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a piston-type double-sided sealed biodegradable polymer dispenser and its preparation method, which mainly solves the technical problems of existing similar products, such as the pump body and the piston structure design within the pump body being inadequate, making it difficult to enhance the sealing performance during the pressing process, while also making it difficult to ensure the collection of leakage and dripping, and to extend the use of the duckbill, and the need for improvement in the preparation method. This objective is achieved through the following technical solution.

[0004] A piston-type double-sided sealed biodegradable polymer dispenser is disclosed. The dispenser's spout connects to one end of a valve stem extending from the pump body. A spring is installed on the outer diameter of the extended section of the valve stem at the connection point. One end of the spring abuts against a protrusion on the top outer diameter of the valve stem, and the other end abuts against a groove in the connecting seat that extends into the pump core. The opening of a large ring is fastened and fixed between the outer ring rib at the pump inlet of the pump body and the outer edge of the seat opening of the connecting seat. A gasket is provided below the outer ring rib of the pump body at the top of the large ring. The grooved section of the connecting seat is fitted and fastened into the pump body. A piston is installed on the outer diameter of the valve stem within the pump body. A through hole is provided on one side of the pump body, and a valve needle is provided at the other end of the valve stem at the piston. While the piston is engaged and fixed to the valve stem, it is also clamped and fixed to the outer diameter of the valve stem by the valve needle. A glass ball is provided at the liquid inlet of the pump body below the valve needle, and a suction tube is provided at the liquid inlet at the bottom of the pump body below the glass ball. The key structural design feature is that the raised sealing surfaces at the upper and lower edges of the piston's outer diameter move up and down to seal against the conical inner wall surface above the through hole of the pump body's inner diameter. Simultaneously, a connecting seat extending into the pump body engages and is fixed to the conical inner wall surface of the pump body above the piston. The large ring is a biodegradable polymer ring. This structure enhances the sealing effect between the piston and the inner wall of the pump body, improving the sealing performance during piston compression.

[0005] Below the liquid outlet of the duckbill is a barbed post. The beak base is snapped and fixed to the barbed post at the bottom of the duckbill. An extension nozzle is provided at the bottom of the beak base, one end of which is hinged and fixed to the beak base. A liquid guide groove is provided on one side of the bottom of the extension nozzle, which opens below the liquid outlet of the duckbill. Thus, the extension nozzle can be easily attached and detached from the bottom of the duckbill through the beak base, and the opening of the extension nozzle extends the liquid outlet of the duckbill.

[0006] One end of the extension nozzle is fixed to the ball head groove of the nozzle base via an interference fit. The extension nozzle is positioned between the symmetrical limiting posts at the bottom of the duckbill. A liquid collection groove is provided on the other side of the top of the extension nozzle. Thus, when the extension nozzle is rotated to the liquid collection groove side to open, excess liquid from the duckbill can drip into the liquid collection groove of the extension nozzle for storage, preventing leakage and contamination of the table or bottle.

[0007] The valve stem has a downward-facing upper spring groove at its top outer diameter protrusion. The groove of the upper spring groove fits into the inner groove of the connecting seat to form a spring chamber, in which the spring is located. This prevents liquid from entering the spring chamber and causing contamination and corrosion to the spring.

[0008] The inner wall of the groove of the connecting seat is provided with equally spaced guide ribs. The outer diameter of the upper spring sleeve groove of the valve stem abuts against the guide ribs. One end of the spring is limited to the spring groove at the boss in the center of the connecting seat, and the outer diameter of the valve stem at the other end of the spring is provided with a raised interference rib. The valve stem extends out of the boss of the connecting seat. This further improves the stability of the valve stem's up and down movement, as well as the stability of the spring.

[0009] The central post at the top of the valve needle is inserted into the central hole in the inner wall of the tapered transition cavity located on the inner diameter of one end of the valve stem. A raised sealing ring is provided on the outer surface of the central post of the valve needle. The sealing ring of the valve needle is inserted into the annular groove at the bottom of the piston. The inner diameter of the piston is engaged and fixed to the outer diameter of the tapered transition cavity of the valve stem. The raised, protruding intermediate ring at the top of the piston is inserted into the positioning groove at the bottom of the connecting seat. This further improves the stability of the valve needle as it moves downwards into position.

[0010] The piston has equidistantly distributed positioning ribs on its inner diameter below the protrusion at the top. Corresponding to these positioning ribs on the outer diameter of the valve stem are engaging ribs, which insert between the positioning ribs of the valve stem. This improves the stability between the piston and the valve stem, preventing rotation of the piston during vertical movement.

[0011] The biodegradable polymer material of the aforementioned biodegradable polymer macrocycle has the following composition and weight ratio: 40-50 parts rice husk cellulose, 16-20 parts reinforcing agent, 5-10 parts biodegradable polymer resin, 2-6 parts solubilizer, and 1-5 parts lubricant. The substrate with the above composition and weight ratio is fed into a high-speed mixer at 700-900 rpm and mixed for 5-7 minutes to form a uniform substrate mixture. This mixture is then vacuum dried at 55-70℃ for 4-8 hours. The material is fed into a single-screw extruder, with the temperature controlled as follows: feeding section 70-110℃, mixing section 90-125℃, plasticizing section 125-175℃, die head 100-165℃, and screw speed 30-60 rpm. After being pelletized by a pelletizer, the above-mentioned base material granules are obtained. The above-mentioned base material granules are vacuum dried at 45-52℃ for 3-4 hours to dry the granules. The granules are then added to an injection molding machine for injection molding. The reinforcing agent is a mixture of EMFORCE BIO, ultrafine calcium carbonate, and oyster shell powder. The oyster shell powder is 100-300 mesh oyster shell powder. The biodegradable polymer resin is any one or a combination of two of PLA or PBAT. The solubilizer is polyvinyl alcohol. The lubricant is ethylene bis-stearamide.

[0012] The method for preparing rice husk cellulose includes the following steps: first, pulverizing rice husk powder to 200-1000 mesh; preparing a 5% (w / w) dilute sulfuric acid solution; mixing the pulverized rice husk powder and the sulfuric acid solution at a (w / w) mass ratio of 1:10; and reacting under reflux boiling conditions for 3 hours. After filtration, the filter residue is washed until neutral. A 5-10 wt% sodium hydroxide pre-impregnation reagent is added and soaked for 20-40 hours, then washed until neutral to obtain pre-impregnated rice husk powder. This pre-impregnated rice husk powder is then added to a flash explosion device for flash explosion treatment. The flash explosion pressure is 1-2.5 MPa, the temperature is 180-200℃, and the pressure holding time is 100-200 s. After obtaining rice husk cellulose, potassium hydroxide solution is added. A mixture of epichlorohydrin and ethanol is added dropwise to the rice husk cellulose aqueous dispersion for reaction. The ratio of epichlorohydrin, ethanol, and potassium hydroxide solution is 2-5 g: 10-20 mL: 30-50 mL: 160 mL, the concentration of potassium hydroxide solution is 2-6.5 wt%, the reaction temperature is 50-65℃, and the time is 3-8 hours to obtain rice husk cellulose.

[0013] The present invention has a reasonable structural design, is convenient to produce and use, and has good sealing and stability. In particular, the extension nozzle for extending the liquid outlet and preventing dripping is easy to install and use. It is suitable for use as a piston double-sided sealed biodegradable polymer dispenser, as well as for structural improvements of similar products. Attached Figure Description

[0014] Figure 1 This is a cross-sectional structural diagram of the present invention, with part A defined in the diagram.

[0015] Figure 2 yes Figure 1 Enlarged view of part A.

[0016] Figure 3 yes Figure 1 A schematic diagram of the piston's three-dimensional structure.

[0017] Figure 4 yes Figure 3 A schematic diagram of the bottom structure.

[0018] Figure 5 yes Figure 1 A cross-sectional structural diagram of the pump body, glass bulb, and suction tube.

[0019] Figure 6 yes Figure 1 The diagram shows the improved structure, with the dashed lines representing the structural changes during the pressing state.

[0020] Attached figures and their names: 1. Suction tube, 2. Glass bulb, 3. Pump body, 301. Conical inner wall, 4. Valve needle, 5. Piston, 501. Raised sealing surface, 502. Positioning rib, 6. Large ring, 7. Gasket, 8. Spring, 9. Connecting seat, 10. Valve stem, 11. Duckbill, 1101. Barbed column, 12. Nozzle base, 13. Extension nozzle, 1301. Liquid guide groove, 1302. Liquid collection groove. Implementation

[0021] The structure and use of the present invention will now be further described with reference to the accompanying drawings. Figures 1-5 As shown, the duckbill 11 of the dispenser is connected to one end of the valve stem 10 extending from the pump body 3. A spring 8 is provided on the outer diameter of the extended section of the valve stem at the connection. One end of the spring abuts against the protrusion on the top outer diameter of the valve stem, and the other end of the spring abuts against the groove of the connecting seat 9 extending into the pump core. The ring of the large ring is fastened and fixed between the outer ring rib at the pump port of the pump body and the outer edge of the seat at the connecting seat. A gasket 7 is provided below the outer ring rib of the pump body at the top ring of the large ring. The groove section of the connecting seat is fitted and fastened and fixed in the pump body. A piston 5 is provided on the outer diameter of the valve stem in the pump body. A through hole is provided on one side of the pump body at the piston. A valve needle 4 is provided on the other end of the valve stem at the piston. While the piston is fastened and fixed to the valve stem, the piston is also clamped and fixed to the outer diameter of the valve stem by the valve needle. A glass ball 2 is provided at the liquid inlet hole in the pump body below the valve needle. A suction tube 1 is provided at the liquid inlet hole at the bottom of the pump body below the glass ball. Its specific structure is as follows: The raised sealing surface 501 at the upper and lower edges of the piston's outer diameter and the tapered inner wall surface 301 above the through hole of the pump body's inner diameter simultaneously seal with each other. At the same time, the connecting seat extending into the pump body is fastened and fixed to the tapered inner wall surface of the pump body above the piston. The top outer diameter of the valve stem has a downward-facing upper spring sleeve groove. The groove of the upper spring sleeve of the valve stem fits into the groove of the connecting seat to form a spring chamber, and the spring is located in the spring chamber. The inner wall of the groove of the connecting seat has equidistantly distributed guide ribs. The outer diameter of the upper spring sleeve groove of the valve stem abuts against the guide ribs. One end of the spring is limited to the spring groove at the boss in the center of the connecting seat. The outer diameter of the valve stem at the other end of the spring has a raised interference rib, and the valve stem extends out of the boss of the connecting seat. The central post at the top of the valve needle is inserted into the central hole in the inner wall of the tapered transition cavity located on the inner diameter of one end of the valve stem. A raised sealing ring is provided on the outer surface of the central post of the valve needle. The sealing ring of the valve needle is inserted into the annular groove at the bottom of the piston. The inner diameter of the piston is engaged and fixed to the outer diameter of the tapered transition cavity of the valve stem. The raised intermediate ring at the top of the piston is inserted into the positioning groove at the bottom of the connecting seat. Positioning ribs 502 are evenly distributed at the ring platform of the inner diameter below the raised section of the piston top. Engaging ribs are provided on the outer diameter of the valve stem corresponding to the positioning ribs, and the engaging ribs of the valve stem are inserted between the positioning ribs of the piston.

[0022] Based on the above structural characteristics, such as Figure 6As shown, a barbed post 1101 is provided below the liquid outlet of the duckbill. The duckbill base 12 is snapped and hidden to the barbed post at the bottom of the duckbill. An extension nozzle 13 is provided at the bottom of the duckbill base. One end of the extension nozzle is hinged and fastened to the duckbill base. A liquid guiding groove 1301 is provided on one side of the bottom of the extension nozzle, which opens to the liquid outlet of the duckbill. One end of the extension nozzle is fastened and fixed to the ball head groove of the duckbill base by an interference fit with a ball head. The extension nozzle is limited between the symmetrical limiting posts at the bottom of the duckbill. A liquid collecting groove 1302 is provided on the other side of the top of the extension nozzle.

[0023] When in use, install the large ring on the external thread at the bottle mouth, press the duckbill, and the liquid in the bottle will enter the pump body through the suction tube and flow out from the duckbill. If you need to extend the liquid outlet position, open the extension nozzle at the bottom of the duckbill to the side of the liquid guide groove, and make the liquid guide groove of the extension nozzle below the liquid outlet of the duckbill. If you need to prevent the duckbill from dripping and contaminating the bottle or table, tilt the extension nozzle upwards above the horizontal plane, or open the extension nozzle at the bottom of the duckbill to the side of the liquid collection groove, and make the liquid collection groove of the extension nozzle below the liquid outlet of the duckbill.

[0024] The aforementioned macrocycle is a biodegradable polymer macrocycle. The composition and weight ratio of the biodegradable polymer material in the biodegradable polymer macrocycle are as follows: Example 1: 40 parts rice husk cellulose, 16 parts reinforcing agent, 5 parts biodegradable polymer resin, 2 parts solubilizer, and 1 part lubricant. The substrate with the above composition and weight ratio is fed into a high-speed mixer at a speed of 700 rpm and mixed for 5 minutes to form a uniform substrate mixture. It is then vacuum dried at 55°C for 4 hours and fed into a single-screw extruder. The temperature is controlled at: 70°C in the feeding section, 90°C in the mixing section, 125°C in the plasticizing section, and 100°C in the die head, with a screw speed of 30 rpm. After being pelletized by a pelletizer, the above substrate granules are obtained. The above substrate granules are then vacuum dried at 45°C for 3 hours to dry the granules. The granules are then added to an injection molding machine for injection molding. Example 2: 45 parts rice husk cellulose, 18 parts reinforcing agent, 8 parts biodegradable polymer resin, 4 parts solubilizer, and 3 parts lubricant were mixed in a high-speed mixer at 800 rpm for 6 minutes to form a uniform substrate mixture. The mixture was then vacuum-dried at 60°C for 6 hours and fed into a single-screw extruder. The temperatures were controlled as follows: feeding section 90°C, mixing section 110°C, plasticizing section 150°C, die head 155°C, and screw speed 50 rpm. After pelletizing, the substrate granules were obtained. These granules were then vacuum-dried at 50°C for 3.5 hours to dry them. The dried granules were then injection molded into finished products. Example 3: 50 parts rice husk cellulose, 20 parts reinforcing agent, 10 parts biodegradable polymer resin, 6 parts solubilizer, and 5 parts lubricant; the above-mentioned components and weight ratios of the substrate are fed into a high-speed mixer at 900 rpm for 7 minutes to form a uniform substrate mixture; the mixture is then vacuum dried at 70°C for 8 hours and fed into a single-screw extruder with the following temperature controls: feeding section 110°C, mixing section 125°C, plasticizing section 175°C, die head 165°C, and screw speed 60 rpm. After being pelletized by a pelletizer, the above-mentioned substrate granules are obtained; the above-mentioned substrate granules are then vacuum dried at 52°C for 4 hours to dry the granules, and then injection molded into shape.

[0025] The reinforcing agent is a mixture of EMFORCE BIO, ultrafine calcium carbonate, and oyster shell powder; the oyster shell powder is 100-300 mesh oyster shell powder; the biodegradable polymer resin is any one or a combination of two of PLA or PBAT; the solubilizer is polyvinyl alcohol; and the lubricant is ethylene bis-stearamide.

[0026] The above-mentioned method for preparing rice husk cellulose includes the following steps: first, pulverizing rice husk powder to 200-1000 mesh; preparing a 5% (w / w) dilute sulfuric acid solution; mixing the pulverized rice husk and sulfuric acid solution at a (w / w) mass ratio of 1:10; and reacting under reflux boiling conditions for 3 hours. After filtration, the filter residue is washed until neutral. A 5-10 wt% sodium hydroxide pre-impregnation reagent is added and soaked for 20-40 hours, then washed until neutral to obtain pre-impregnated rice husk powder. This pre-impregnated rice husk powder is then added to a flash explosion device for flash explosion treatment. The flash explosion pressure is 1-2.5 MPa, the temperature is 180-200℃, and the pressure holding time is 100-200 s. After obtaining rice husk cellulose, potassium hydroxide solution is added. A mixture of epichlorohydrin and ethanol is added dropwise to the rice husk cellulose aqueous dispersion for reaction. The ratio of epichlorohydrin, ethanol, and potassium hydroxide solution is 2-5 g: 10-20 mL: 30-50 mL: 160 mL, the concentration of potassium hydroxide solution is 2-6.5 wt%, the reaction temperature is 50-65℃, and the time is 3-8 hours to obtain rice husk cellulose.

Claims

1. A piston double-sided sealed biodegradable polymer dispenser, wherein the dispenser's spout (11) is connected to one end of the valve stem (10) extending out of the pump body (3), and a spring (8) is provided on the outer diameter of the valve stem extension section at the connection point. One end of the spring abuts against the protrusion on the top outer diameter of the valve stem, and the other end of the spring abuts against the groove of the connecting seat (9) extending into the pump core. The large ring is fastened and fixed between the outer ring rib at the pump port of the pump body and the outer edge of the seat opening of the connecting seat. A gasket (7) is provided below the outer ring rib of the pump body at the top ring of the large ring. The groove section of the connecting seat is fitted and fastened and fixed in the pump body. A piston (5) is provided on the outer diameter of the valve stem in the pump body. A through hole is provided on one side of the pump body at the piston. A valve needle (4) is provided on the other end of the valve stem at the piston. While the piston is fastened and fixed to the valve stem, the piston is also fixed to the outer diameter of the valve stem by the valve needle. A glass ball (2) is provided at the liquid inlet hole in the pump body below the valve needle. A suction tube (1) is provided at the liquid inlet hole at the bottom of the pump body below the glass ball. The feature is: The piston (5) has a raised sealing surface (501) at the upper and lower edges of its outer diameter that moves up and down to seal the conical inner wall surface (301) above the through hole of the pump body. At the same time, the connecting seat (9) that extends into the pump body is fastened and fixed to the conical inner wall surface of the pump body above the piston. The large ring is a biodegradable polymer large ring. The duckbill (11) has a barbed post (1101) below the liquid outlet hole. The beak base (12) is snapped and hidden to the barbed post at the bottom of the duckbill. The bottom of the beak base has an extension mouth (13). One end of the extension mouth is hinged and fastened to the beak base. The bottom side of the extension mouth has a liquid guide groove (1301) that opens below the liquid outlet hole on the duckbill. One end of the extended nozzle (13) is fixed to the ball head groove of the nozzle base (12) by ball head interference hinge. The extended nozzle is located between the symmetrical limiting posts at the bottom of the duckbill (11). The other side of the top of the extended nozzle is provided with a liquid collection groove (1302).

2. The piston double-sided sealed biodegradable polymer dispenser according to claim 1, characterized in that... The valve stem (10) has a downward-facing upper spring sleeve groove at the top outer diameter protrusion. The groove of the upper spring sleeve of the valve stem fits into the inner groove of the connecting seat (9) to form a spring chamber, and the spring is located in the spring chamber.

3. The piston double-sided sealed biodegradable polymer dispenser according to claim 2, characterized in that... The inner wall of the groove of the connecting seat (9) is provided with equidistantly distributed guide ribs. The outer diameter of the upper spring sleeve groove of the valve stem (10) abuts against the guide ribs. One end of the spring (8) is limited to the spring groove at the boss in the center of the connecting seat. The outer diameter of the valve stem at the other end of the spring is provided with a raised interference rib. The valve stem extends out of the boss of the connecting seat.

4. The piston double-sided sealed biodegradable polymer dispenser according to claim 1, characterized in that... The central post at the top of the valve needle (4) is inserted into the central hole at the inner wall of the tapered transition cavity at one end of the valve stem (10). The outer ring of the central post of the valve needle is provided with a raised sealing ring. The sealing ring of the valve needle is inserted into the annular groove at the bottom of the piston (5). The inner diameter of the piston is fastened and fixed to the outer diameter at the tapered transition cavity of the valve stem. The raised and protruding intermediate ring at the top of the piston is inserted into the positioning groove at the bottom of the connecting seat (9).

5. The piston double-sided sealed biodegradable polymer dispenser according to claim 4, characterized in that... The piston (5) has equidistantly distributed positioning ribs (502) at the inner diameter of the protrusion below the top of the piston (5). The valve stem (10) corresponding to the positioning ribs has meshing ribs on its outer diameter, and the meshing ribs of the valve stem are inserted between the positioning ribs of the piston.

6. The method for preparing the piston double-sided sealed biodegradable polymer dispenser according to claim 1, characterized in that... The biodegradable polymer material of the aforementioned biodegradable polymer macrocycle has the following composition and weight ratio: 40-50 parts rice husk cellulose, 16-20 parts reinforcing agent, 5-10 parts biodegradable polymer resin, 2-6 parts solubilizer, and 1-5 parts lubricant. The substrate with the above composition and weight ratio is fed into a high-speed mixer at 700-900 rpm and mixed for 5-7 minutes to form a uniform substrate mixture. This mixture is then vacuum dried at 55-70℃ for 4-8 hours. The material is fed into a single-screw extruder, with the temperature controlled as follows: feeding section 70-110℃, mixing section 90-125℃, plasticizing section 125-175℃, die head 100-165℃, and screw speed 30-60 rpm. After being pelletized by a pelletizer, the above-mentioned base material granules are obtained. The above-mentioned base material granules are vacuum dried at 45-52℃ for 3-4 hours to dry the granules. The granules are then added to an injection molding machine for injection molding. The reinforcing agent is a mixture of EMFORCE BIO, ultrafine calcium carbonate, and oyster shell powder. The oyster shell powder is 100-300 mesh oyster shell powder. The biodegradable polymer resin is any one or a combination of two of PLA or PBAT. The solubilizer is polyvinyl alcohol. The lubricant is ethylene bis-stearamide.

7. The method for preparing the piston double-sided sealed biodegradable polymer dispenser according to claim 6, characterized in that... The method for preparing rice husk cellulose includes the following steps: first, pulverizing rice husk powder to 200-1000 mesh; preparing a 5% (w / w) dilute sulfuric acid solution; mixing the pulverized rice husk powder and the sulfuric acid solution at a (w / w) mass ratio of 1:10; and reacting under reflux boiling conditions for 3 hours. After filtration, the filter residue is washed until neutral. A 5-10 wt% sodium hydroxide pre-impregnation reagent is added and soaked for 20-40 hours, then washed until neutral to obtain pre-impregnated rice husk powder. This pre-impregnated rice husk powder is then added to a flash explosion device for flash explosion treatment. The flash explosion pressure is 1-2.5 MPa, the temperature is 180-200℃, and the pressure holding time is 100-200 s. After obtaining rice husk cellulose, potassium hydroxide solution is added. A mixture of epichlorohydrin and ethanol is added dropwise to the rice husk cellulose aqueous dispersion for reaction. The ratio of epichlorohydrin, ethanol, and potassium hydroxide solution is 2-5 g: 10-20 mL: 30-50 mL: 160 mL, the concentration of potassium hydroxide solution is 2-6.5 wt%, the reaction temperature is 50-65℃, and the time is 3-8 hours to obtain rice husk cellulose.

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