Preparation method of plant fiber-based paper seed rope

Abstract

The invention belongs to the technical field of materials, and provides a preparation method of a plant fiber-based paper seed rope, which comprises the following steps: washing plant fibers with water to remove impurities and other pollutants until the surfaces of the plant fibers have no obvious stains, and drying the plant fibers in a drying oven; sequentially removing hemicellulose and lignin from the plant fibers; continuously cleaning the plant fibers, putting the plant fibers into water, and uniformly stirring, so that the fibers are uniformly dispersed in the water; and preparing the plant fiber paper into a plant fiber paper strip with certain strength by using a papermaking mold. According to the method, hemicellulose and lignin are removed from plant fibers, so that the prepared fiber paper has good degradation performance and can be made into a seed rope to provide a suitable growth environment for seeds, meanwhile, the problem of environmental pollution possibly caused by traditional paper is avoided, the preparation method is simple and easy to implement, raw materials are wide in source, and the method is suitable for industrial production. And the method is suitable for large-scale preparation and low in cost.

Description

Technical Field

[0001] The invention belongs to the technical field of materials and relates to a method for preparing a plant fiber-based paper seed rope. Background Art

[0002] In the fields of agricultural planting and ecological restoration, seed sowing method has always been a key factor influencing crop growth and ecological restoration outcomes. While traditional seed sowing methods are simple and straightforward, they also have some significant limitations. For example, manual broadcasting makes it difficult to ensure uniform seed distribution, which can result in localized over- or under-density, impacting crop growth and yield. Furthermore, traditional sowing methods often struggle to guarantee seed germination and survival rates when faced with adverse climatic conditions or soil conditions, further impacting the success of the entire planting project.

[0003] To overcome the shortcomings of traditional sowing methods, seed rope technology has gradually gained attention and achieved certain application in recent years. Seed rope is a sowing material that wraps or adheres seeds to a rope-like carrier with a certain strength and flexibility. Its advantages include achieving uniform seed distribution, improving sowing efficiency, and protecting seeds from adverse environmental influences such as drought, sandstorms, and bird and animal attacks, thereby increasing seed germination and survival rates. However, most common seed ropes on the market currently use chemical synthetic fibers or plastic materials as carriers. While these materials have good physical properties, they are difficult to degrade in the natural environment. After use, they leave a large amount of difficult-to-treat waste residue, posing a potential risk of soil and ecological pollution. This runs counter to the concepts of modern ecological agriculture and sustainable development. Seed ropes made of non-woven fabrics or paper tape lack tensile strength and often break during mechanized operations, affecting the efficiency of large-scale sowing. Summary of the Invention

[0004] In order to overcome the shortcomings of the existing technology, the present invention provides a method for preparing a plant fiber-based paper seed rope to solve the environmental problems existing in the existing seed rope, and at the same time provides a new seed rope product with low cost, simple preparation process and easy large-scale production, so as to meet the needs of modern agriculture and ecological restoration for environmentally friendly and efficient sowing materials.

[0005] To solve the above technical problems, the present invention provides the following technical solution: a method for preparing a plant fiber-based paper seed rope, comprising the following steps: Wash plant fibers with a fiber fineness of 1 to 3 microns and a length of 10 to 33 mm with water to remove impurities and other contaminants until there are no obvious stains on the surface; The cleaned plant fibers are placed in an oven for drying until the moisture content is below 10%; The dried plant fibers are sequentially subjected to removal of hemicellulose and lignin to obtain delignified plant fibers; Wash the delignified plant fibers, put them into water and stir them evenly to make the fibers evenly dispersed in the water. Using a papermaking mold to make the dispersed plant fibers into fiber paper strips with a certain strength; The fiber paper strips with seeds are rolled into a rope shape, fixed and dried to make plant seed ropes.

[0006] As a preferred technical solution of the present invention, the oven drying temperature is 40 to 60° C., and the drying time is 4 to 8 hours.

[0007] As a preferred technical solution of the present invention, the cleaned plant fiber is subjected to the removal of hemicellulose and lignin. The hemicellulose removal treatment temperature is 60-70°C and the treatment time is 1-2 hours; the lignin removal treatment temperature is 65-75°C and the treatment time is 1-3 hours.

[0008] As a preferred technical solution of the present invention, the plant fiber is sequentially subjected to the removal of hemicellulose and lignin, comprising the following steps: Plant fibers are soaked in a chemical solution, heated, and washed to obtain high-purity fibers.

[0009] As a preferred technical solution of the present invention, the chemical solution is sodium hydroxide solution and sodium chlorite solution.

[0010] As a preferred technical solution of the present invention, the mass ratio of the dehydrated plant fiber to sodium hydroxide is 1:10 to 1:20.

[0011] As a preferred technical solution of the present invention, the mass ratio of the plant fiber to sodium chlorite is 1:2 to 1:4.

[0012] As a preferred technical solution of the present invention, the sodium hydroxide solution is stirred evenly, and the sodium chlorite solution is further stirred evenly while being stirred and heated.

[0013] As a preferred technical solution of the present invention, the thickness of the prepared fiber paper is 0.5 to 2 mm.

[0014] As a preferred technical solution of the present invention, after the plant fiber is placed in the mold, the oven temperature is 60° C. and the drying time is 6 to 10 hours.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention converts plant fibers into fiber paper strips with good flexibility and strength, and uses these as a basis to make seed ropes. This seed rope has good flexibility and strength. Not only does it exhibit mechanical properties that do not break, it can meet the mechanical performance requirements of the agricultural planting process and is not prone to problems such as breakage during sowing or subsequent growth stages. In addition, its water absorption and expansion rate is moderate, which ensures good contact between the seeds and the soil while not affecting the normal germination and growth of the seeds due to excessive expansion. All performance indicators can meet or even exceed the national standards for relevant agricultural planting materials. Tests have shown that the tensile strength of the plant fibers prepared by the method of the present invention is 1 to 2 times that of non-woven fabrics or traditional paper, close to the tensile strength of chemical synthetic fibers, and its water absorption and expansion rate is better than that of chemical synthetic fibers, non-woven fabrics, or traditional paper. The seed survival rate is also better than that of traditional seed rope products.

[0016] 2. The preparation method of the present invention is simple to operate, easy to master and implement, has low requirements for equipment, and the raw material plants are widely available and low in cost, so that the production of the seed rope can be easily scaled up, thereby effectively reducing the unit production cost, and has good market competitiveness and potential for large-scale promotion and application.

[0017] 3. The plant fiber-based paper seed rope prepared by the present invention can be completely degraded naturally after use. Unlike traditional seed ropes, it will not leave residual difficult-to-degrade chemicals or plastic components in the soil, causing damage to the soil structure and ecological environment. It truly realizes the green and environmental protection concept in the agricultural production process and provides a new and sustainable seeding material option for the development of ecological agriculture. Its environmental performance and cost-effectiveness are in a leading position among similar products currently. It is expected to lead a technological innovation in the seed rope field and bring more efficient and environmentally friendly solutions to agricultural planting and ecological restoration. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, purpose and efficacy of the present invention easy to understand, the present invention is further described below in conjunction with specific examples, but the following examples are only preferred embodiments of the present invention, not all. Based on the examples in the embodiments, other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention. The experimental methods in the following examples, unless otherwise specified, are conventional methods, and the materials, reagents, etc. used in the following examples, unless otherwise specified, can be obtained from commercial channels.

[0019] Example 1: The plant fibers of the present invention can be any one or more fibers such as poplar fluff, willow fluff, cotton, dandelion fluff, crushed plant fibers (grass, straw, etc.), etc. The fiber fineness is 1 to 3 microns and the length is 10 to 33 mm.

[0020] Weigh 10g of poplar fluff and place it in a sodium hydroxide solution, along with 2470mL of water and 130g of NaOH, in a waterbath and heat at 65°C for 1 hour to remove hemicellulose. After the solution is rinsed with clean water, 2600mL of water, 24.7g of NaClO₂, and an appropriate amount of glacial acetic acid are added to adjust the pH to below 4.6. The solution is then placed in a waterbath and heated with stirring at 70°C for 90 minutes to delignify. After the reaction is complete, the fibers are laid flat in a papermaking mold and dried at 60°C for 90 minutes to produce 1mm thick poplar fluff paper strips. Seeds are then hand-curled and wrapped in the solution to create seed ropes with a coiled diameter of 10mm.

[0021] The tensile strength of the treated poplar fiber was measured to be 280 MPa.

[0022] Example 2: 10g of poplar fluff was placed in a sodium hydroxide solution, 2470mL of water, and 130g of NaOH, heated in a waterbath at 60°C for 2 hours to remove hemicellulose. After the solution was rinsed with clean water, 2600mL of water and 24.7g of NaClO₂ were added, and the pH was adjusted to 4.6 with glacial acetic acid. The fibers were then heated in a waterbath at 75°C for 60 minutes with stirring to delignify. After the reaction was complete, the fibers were flattened and placed in a papermaking mold and dried at 60°C for 90 minutes to produce 1mm thick poplar fluff paper strips. Seeds were hand-rolled and wrapped in the solution to produce seed ropes with a coiled diameter of 10mm. Hand-rolled plant seed ropes with a coiled diameter of 10mm were produced. The tensile strength of the treated poplar fluff fibers was measured to be 285MPa.

[0023] Example 3: Weigh 10g of catkins and place them in a sodium hydroxide solution. 2850mL of water and 150g of NaOH were placed in a waterbath and heated at 60°C for 2h to remove hemicellulose. After the time was up, rinse with clean water. 2600mL of water and 24.7g of NaClO2 were added, and the pH was adjusted to 4.6 with an appropriate amount of glacial acetic acid. The catkins were placed in a waterbath and heated with stirring at 75°C for 180min to delignify. After the reaction was complete, the fibers were flattened and placed in a papermaking mold and dried at 60°C for 90min to obtain 2mm thick catkin paper strips. Seeds were hand-rolled and wrapped in the solution to produce seed ropes with a coiled diameter of 10mm. The hand-rolled seed ropes had a coiled diameter of 10mm. The tensile strength of the treated catkin fibers was measured to be 290MPa.

[0024] Example 4: Weigh 10g of catkins and place them in a sodium hydroxide solution. 2470mL of water and 130g of NaOH were placed in a waterbath and heated at 80°C for 2h to remove hemicellulose. After the time was up, rinse with clean water. 2600mL of water and 24.7g of NaClO2 were added, and the pH was adjusted to 4.6 with an appropriate amount of glacial acetic acid. The fibers were placed in a waterbath and heated at 80°C for 120min to delignify. After the reaction was complete, the fibers were flattened and placed in a papermaking mold and dried at 60°C for 90min to obtain 2mm thick catkin paper strips. Seeds were hand-rolled and wrapped in this solution to produce seed ropes with a coiled diameter of 10mm. Hand-rolled catkin-based seed ropes with a coiled diameter of 10mm were produced. The tensile strength of the catkins was measured to be 289MPa.

[0025] The material index data of the plant fiber prepared by the method of the present invention and the traditional plant fiber and chemical fiber (cotton) of the same size are tested according to the test method prescribed by the state as follows:

[0026] The above-mentioned index data show that the tensile strength, water absorption rate and seedling rate of the product prepared by the present invention are higher than those of traditional plant fibers, and the unit cost is lower than that of traditional plant fibers and chemical fibers. This shows that the present invention has good flexibility and strength. Not only does it exhibit unbreakable mechanical properties and can meet the mechanical performance requirements in the agricultural planting process, but its water absorption and expansion rate is moderate, which not only ensures good contact between seeds and soil, but also does not affect the normal germination and growth of seeds due to excessive expansion, effectively reducing the unit production cost. All performance indicators can reach or even exceed the national standards for relevant agricultural planting materials.

[0027] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a plant fiber-based paper seed rope, characterized by: The following steps are involved: Wash plant fibers with a fiber fineness of 1 to 3 microns and a length of 10 to 33 mm with water to remove impurities and other contaminants until there are no obvious stains on the surface; The cleaned plant fibers are placed in an oven for drying until the moisture content is below 10%; The dried plant fibers are sequentially subjected to removal of hemicellulose and lignin to obtain delignified plant fibers; Wash the delignified plant fibers, put them into water and stir them evenly to make the fibers evenly dispersed in the water. Using a papermaking mold to make the dispersed plant fibers into fiber paper strips with a certain strength; The fiber paper strips with seeds are rolled into a rope shape, fixed and dried to make plant seed ropes.

2. The method for preparing a plant fiber-based paper seed rope according to claim 1, characterized in that: The oven drying temperature is 40 to 60° C., and the drying time is 4 to 8 hours.

3. The method for preparing a plant fiber-based paper seed rope according to claim 1, characterized in that: The cleaned plant fibers are subjected to removal of hemicellulose and lignin. The hemicellulose removal treatment temperature is 60-70° C., and the treatment time is 1-2 hours; the lignin removal treatment temperature is 65-75° C., and the treatment time is 1-3 hours.

4. The method for preparing a plant fiber-based paper seed rope according to claim 3, wherein: The plant fibers are sequentially subjected to the removal of hemicellulose and lignin, including the following steps: Plant fibers are soaked in a chemical solution, heated, and washed to obtain high-purity fibers.

5. The method for preparing a plant fiber-based paper seed rope according to claim 4, characterized in that: The chemical solutions are sodium hydroxide solution and sodium chlorite solution.

6. The method for preparing a plant fiber-based paper seed rope according to claim 1, characterized in that: The mass ratio of the dehydrated plant fiber to sodium hydroxide is 1:10 to 1:

20.

7. The method for preparing a plant fiber-based paper seed rope according to claim 6, characterized in that: The mass ratio of the plant fiber to sodium chlorite is 1:2 to 1:

4.

8. The method for preparing a plant fiber-based paper seed rope according to claim 1, wherein: The sodium hydroxide solution is stirred evenly, and the sodium chlorite solution is further stirred evenly while stirring and heating.

9. The method for preparing a plant fiber-based paper seed rope according to claim 1, wherein: The thickness of the produced fiber paper is 0.5 to 2 mm.

10. The method for preparing a plant fiber-based paper seed rope according to claim 9, characterized in that: After the plant fiber is placed in the mold, the oven temperature is 60°C and the drying time is 6 to 10 hours.

Images