Preparation method of sericin polyvinyl alcohol fiber

Abstract

The invention provides a preparation method of a sericin polyvinyl alcohol fiber, and relates to the field of polyvinyl alcohol and sericin preparation. According to the preparation method of the polyvinyl alcohol and sericin blend fiber, the polyvinyl alcohol and sericin blend fiber is prepared from the following raw materials in parts by mass: 40-60 parts of sericin, 50-80 parts of polyvinyl alcohol, 6-9 parts of sodium alginate, 5-10 parts of a catalyst, 4-7 parts of a stabilizer and 3-7 parts of a lubricant. The method comprises the following steps: 1, preparing a solution: dissolving sericin in a solvent to obtain a sericin solution, and controlling the dissolving temperature and the dissolving time to ensure that the sericin is completely dissolved; polyvinyl alcohol is also dissolved in the solvent to obtain a polyvinyl alcohol solution, and the dissolving temperature and time need to be controlled to obtain a uniform solution; by arranging the polyvinyl alcohol and the sericin, the sericin serving as a natural protein has good biocompatibility and biodegradability, and when the sericin is added into the fiber, the fiber can be more easily degraded in vivo or in the natural environment, so that the pollution to the environment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of polyvinyl alcohol and sericin blending, and in particular to a method for preparing sericin polyvinyl alcohol fibers. Background Art

[0002] Polyvinyl alcohol is a polymer with excellent performance and wide application. The high-performance fibers prepared from it have excellent corrosion resistance, weather resistance and good bonding properties at the substrate interface. It is the most promising asbestos substitute material in synthetic fibers and has a wide range of uses in the construction industry. It can also be used to make tire cord, industrial fabrics, high-performance ropes, plastics, rubber reinforcement materials, etc., and has great market potential. Therefore, polyvinyl alcohol molecules have properties such as high crystallinity, chemical stability, and thermal stability.

[0003] In the prior art, VAc is used in the preparation process of polyvinyl alcohol, and methanol is added to dissolve it and then filtered to obtain a spinning solution; however, the existing polyvinyl alcohol has serious non-environmental performance when used. In today's environment, strict requirements are imposed on the preparation of existing polyvinyl alcohol to increase environmental protection and degradation functions. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a method for preparing sericin polyvinyl alcohol fibers, which solves the problem of strictly requiring the addition of environmental protection and degradation functions to the existing polyvinyl alcohol preparation.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented by the following technical scheme: a method for preparing sericin polyvinyl alcohol fiber, comprising the following raw materials in the following weight ratios: 40-60 parts of sericin, 50-80 parts of polyvinyl alcohol, 6-9 parts of sodium alginate, 5-10 parts of a catalyst, 4-7 parts of a stabilizer and 3-7 parts of a lubricant;

[0008] Step 1, solution preparation: dissolving sericin in a solvent to obtain a sericin solution, controlling the dissolving temperature and dissolving time to ensure that the sericin is completely dissolved; dissolving polyvinyl alcohol in a solvent to obtain a polyvinyl alcohol solution, and controlling the dissolving temperature and time to obtain a uniform solution;

[0009] Step 2, blending treatment: the sericin solution and the polyvinyl alcohol solution are mixed according to a certain proportion, and corresponding sodium alginate, catalyst, stabilizer and lubricant are added during the mixing process to obtain a blended solution;

[0010] Step 3, stirring: stirring the blended solution to achieve a uniform mixing effect within a specified temperature and stirring time;

[0011] Step 4, spinning preparation: adjusting the concentration, viscosity and degassing of the blended solution to ensure the smooth spinning process;

[0012] Step 5, spinning process: the spinning solution is injected into the spinneret, and the ejected fibers enter the alkaline coagulation bath for coagulation;

[0013] Step 6, post-processing: washing, drying, winding and packaging the blended fibers obtained by spinning.

[0014] Preferably, the stirring temperature in step 3 is 60° C. and the stirring time is 15-30 min.

[0015] Preferably, the concentration of the spinning solution in step 4 is accurately configured to be 15%-16%, the viscosity is controlled according to the actual use scenario and temperature, and the degassing needs to be processed according to the stirring control time in step 3 to remove the bubbles.

[0016] Preferably, the solution formula in the alkaline coagulation bath in step 5 is specifically: alkali, alcohol and water.

[0017] Preferably, the stirring in step 3 can be carried out by mechanical stirring and ultrasonic treatment.

[0018] Preferably, the sericin is synthesized by secretion from the silk glands of silkworms.

[0019] Preferably, in step 1, the dissolution time of sericin is 15-20 min at a temperature of 80-98° C., and the dissolution temperature of polyvinyl alcohol is 98° C. and the dissolution time is 15-30 min.

[0020] (III) Beneficial effects

[0021] The present invention provides a method for preparing sericin polyvinyl alcohol fiber, which has the following beneficial effects:

[0022] The invention comprises polyvinyl alcohol and sericin. The polyvinyl alcohol is generally added with sericin to have good biocompatibility. As a natural protein, sericin has good biocompatibility and biodegradability. When added to the fiber, the fiber can be more easily degraded in the body or in the natural environment, thereby reducing the pollution to the environment. As a natural protein, sericin has excellent biocompatibility, can be well combined with human tissue, and is not easy to produce rejection reaction. In addition, sericin also has certain antibacterial properties. This property makes the fiber added with sericin have potential application value in the fields of antibacterial textiles, medical supplies, etc. Sericin can promote cell adhesion and proliferation. This property is of great significance to the fields of tissue engineering, cell culture, etc. Sericin has good water solubility. This property makes it easier to mix it with other components during the fiber preparation process, and the fiber performance can be regulated by adjusting the content of sericin. At the same time, the water solubility also facilitates the subsequent processing and treatment of the fiber. DETAILED DESCRIPTION

[0023] The following will be combined with 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 making creative work are within the scope of protection of the present invention.

[0024] Embodiment 1:

[0025] The embodiment of the present invention provides a method for preparing sericin polyvinyl alcohol fiber, comprising the following raw materials in the following weight ratios: 40 parts of sericin synthesized by secretion of silkworm silk glands, 80 parts of polyvinyl alcohol, 6 parts of sodium alginate, 10 parts of a catalyst, 7 parts of a stabilizer, and 3 parts of a lubricant;

[0026] Step 1, solution preparation: dissolving sericin in a solvent to obtain a sericin solution, controlling the dissolving temperature and time to ensure that the sericin is completely dissolved; dissolving polyvinyl alcohol in a solvent to obtain a polyvinyl alcohol solution, controlling the dissolving temperature and time to obtain a uniform solution, the sericin dissolving time is: 20 minutes, the temperature is: 80°C, the polyvinyl alcohol dissolving temperature is: 98°C, and the time is: 30 minutes. By dissolving the sericin and polyvinyl alcohol raw materials into a liquid state, it is convenient for subsequent mixing with other materials and fiber preparation operations;

[0027] Step 2, blending treatment: the sericin solution and the polyvinyl alcohol solution are mixed according to a proportion, and the corresponding sodium alginate, catalyst, stabilizer and lubricant are added during the mixing process to obtain a blended solution. Through this structure, the polyvinyl alcohol and sericin as well as the sodium alginate, catalyst, stabilizer and lubricant can be fully mixed to achieve uniformity;

[0028] Step 3, stirring: stirring the blended solution to achieve a uniform mixing effect at a specified temperature and stirring time. The stirring temperature in step 3 is 60° C. and the stirring time is 15 minutes. The solution formula in the alkaline coagulation bath is specifically alkali, alcohol and water. The stirring can be carried out by mechanical stirring and ultrasonic treatment. Through this structure, polyvinyl alcohol and sericin as well as sodium alginate, catalyst, stabilizer and lubricant can be mixed;

[0029] Step 4, spinning preparation: adjust the concentration, viscosity and degassing of the blended solution to ensure the smooth spinning process. The concentration is accurately configured to be 15% of the spinning solution. The viscosity is controlled according to the actual use scenario and temperature, and the degassing needs to deal with the bubbles according to the stirring control time in step 3;

[0030] Step 5, spinning process: the spinning solution is injected into the spinneret, and the fibers ejected enter the alkaline coagulation bath for coagulation, so as to shape the fibers ejected by the combination of polyvinyl alcohol and sericin, thereby achieving the preparation of the fibers;

[0031] Step 6, post-processing: washing, drying, winding and packaging the blended fibers obtained by spinning. This structure completes the preparation of the fibers, making it convenient for subsequent use.

[0032] Embodiment 2:

[0033] The difference between this embodiment and the first embodiment is that: a method for preparing sericin polyvinyl alcohol fiber comprises the following raw materials in the following weight ratios: 50 parts of sericin synthesized by secretion of silkworm silk glands, 70 parts of polyvinyl alcohol, 7 parts of sodium alginate, 7 parts of catalyst, 4 parts of stabilizer and 5 parts of lubricant;

[0034] Step 1, solution preparation: dissolving sericin in a solvent to obtain a sericin solution, controlling the dissolving temperature and time to ensure that the sericin is completely dissolved; dissolving polyvinyl alcohol in a solvent to obtain a polyvinyl alcohol solution, controlling the dissolving temperature and time to obtain a uniform solution, the sericin dissolving time is: 17 minutes, the temperature is: 90°C, the polyvinyl alcohol dissolving temperature is: 98°C, and the time is: 15 minutes. By dissolving the sericin and polyvinyl alcohol raw materials into a liquid state, it is convenient to mix with other materials and prepare fibers in the subsequent process;

[0035] Step 2, blending treatment: the sericin solution and the polyvinyl alcohol solution are mixed according to a proportion, and the corresponding sodium alginate, catalyst, stabilizer and lubricant are added during the mixing process to obtain a blended solution. Through this structure, the polyvinyl alcohol and sericin as well as the sodium alginate, catalyst, stabilizer and lubricant can be fully mixed to achieve uniformity;

[0036] Step 3, stirring: stirring the blended solution to achieve a uniform mixing effect at a specified temperature and stirring time. The stirring temperature in step 3 is 60° C. and the stirring time is 20 minutes. The solution formula in the alkaline coagulation bath is specifically alkali, alcohol and water. The stirring can be carried out by mechanical stirring and ultrasonic treatment. Through this structure, polyvinyl alcohol and sericin as well as sodium alginate, catalyst, stabilizer and lubricant can be mixed;

[0037] Step 4, spinning preparation: adjust the concentration, viscosity and degassing of the blended solution to ensure the smooth spinning process. The concentration is accurately configured to be 16% of the spinning solution. The viscosity is controlled according to the actual use scenario and temperature, and the degassing needs to deal with the bubbles according to the stirring control time in step 3;

[0038] Step 5, spinning process: the spinning solution is injected into the spinneret, and the fibers ejected enter the alkaline coagulation bath for coagulation, so as to shape the fibers ejected by the combination of polyvinyl alcohol and sericin, thereby achieving the preparation of the fibers;

[0039] Step 6, post-processing: washing, drying, winding and packaging the blended fibers obtained by spinning. This structure completes the preparation of the fibers, making it convenient for subsequent use.

[0040] Embodiment 3

[0041] The present embodiment is different from the first embodiment in that: a method for preparing sericin polyvinyl alcohol fiber comprises the following raw materials in the following weight ratios: 60 parts of sericin synthesized by secretion of silkworm silk glands, 50 parts of polyvinyl alcohol, 9 parts of sodium alginate, 4 parts of a catalyst, 6 parts of a stabilizer and 6 parts of a lubricant;

[0042] Step 1, solution preparation: dissolving sericin in a solvent to obtain a sericin solution, controlling the dissolving temperature and time to ensure that the sericin is completely dissolved; dissolving polyvinyl alcohol in a solvent to obtain a polyvinyl alcohol solution, controlling the dissolving temperature and time to obtain a uniform solution, the sericin dissolving time is: 18 minutes, the temperature is: 98°C, the polyvinyl alcohol dissolving temperature is: 98°C, and the time is: 25 minutes. By dissolving the sericin and polyvinyl alcohol raw materials into a liquid state, it is convenient to mix with other materials and prepare fibers in the subsequent process;

[0043] Step 2, blending treatment: the sericin solution and the polyvinyl alcohol solution are mixed according to a proportion, and the corresponding sodium alginate, catalyst, stabilizer and lubricant are added during the mixing process to obtain a blended solution. Through this structure, the polyvinyl alcohol and sericin as well as the sodium alginate, catalyst, stabilizer and lubricant can be fully mixed to achieve uniformity;

[0044] Step 3, stirring: stirring the blended solution to achieve a uniform mixing effect at a specified temperature and stirring time. The stirring temperature in step 3 is 60° C. and the stirring time is 25 minutes. The solution formula in the alkaline coagulation bath is specifically alkali, alcohol and water. The stirring can be carried out by mechanical stirring and ultrasonic treatment. Through this structure, polyvinyl alcohol and sericin as well as sodium alginate, catalyst, stabilizer and lubricant can be mixed;

[0045] Step 4, spinning preparation: adjust the concentration, viscosity and degassing of the blended solution to ensure the smooth spinning process. The concentration is accurately configured to be 15% of the spinning solution. The viscosity is controlled according to the actual use scenario and temperature, and the degassing needs to deal with the bubbles according to the stirring control time in step 3;

[0046] Step 5, spinning process: the spinning solution is injected into the spinneret, and the fibers ejected enter the alkaline coagulation bath for coagulation, so as to shape the fibers ejected by the combination of polyvinyl alcohol and sericin, thereby achieving the preparation of the fibers;

[0047] Step 6, post-processing: washing, drying, winding and packaging the blended fibers obtained by spinning. This structure completes the preparation of the fibers, making it convenient for subsequent use.

[0048] Comparative example: An embodiment of the present invention provides a method for preparing polyvinyl alcohol and sericin blended fibers, comprising the following preparation raw materials: sericin, polyvinyl alcohol, sodium alginate, a catalyst, a stabilizer and a lubricant, and the mass proportions are: 40-60 parts of sericin, 50-80 parts of polyvinyl alcohol, 6-9 parts of sodium alginate, 5-10 parts of a catalyst, 4-7 parts of a stabilizer and 3-7 parts of a lubricant.

[0049] The polyvinyl alcohol and sericin blended fibers prepared in Example 1, Example 2, Example 3 and the comparative example were used respectively, and the conditions during use were recorded. The results are shown in Table 1:

[0050] Embodiment 1 Embodiment 2 Embodiment 3 Comparative Example Sericin / serving 40 50 60 0 Polyvinyl alcohol / part 80 70 50 80 Sodium alginate / part 6 7 9 6 Catalyst / part 10 7 4 10 Stabilizer / part 7 4 6 7 Lubricant / part 3 5 6 3 Effects better generally Lower Poor

[0051] It can be seen from Table 1 that the addition of different sericin raw materials in Example 1, Example 2 and Example 3 increases the use of polyvinyl alcohol in the preparation and achieves better results.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing sericin polyvinyl alcohol fiber, characterized in that: The preparation method comprises the following raw materials in the following weight ratios: 40-60 parts of sericin, 50-80 parts of polyvinyl alcohol, 6-9 parts of sodium alginate, 5-10 parts of catalyst, 4-7 parts of stabilizer and 3-7 parts of lubricant; Step 1, solution preparation: dissolving sericin in a solvent to obtain a sericin solution, controlling the dissolving temperature and dissolving time to ensure that the sericin is completely dissolved; dissolving polyvinyl alcohol in a solvent to obtain a polyvinyl alcohol solution, and controlling the dissolving temperature and time to obtain a uniform solution; Step 2, blending treatment: the sericin solution and the polyvinyl alcohol solution are mixed according to a certain proportion, and corresponding sodium alginate, catalyst, stabilizer and lubricant are added during the mixing process to obtain a blended solution; Step 3, stirring: stirring the blended solution to achieve a uniform mixing effect within a specified temperature and stirring time; Step 4, spinning preparation: adjusting the concentration, viscosity and degassing of the blended solution to ensure the smooth spinning process; Step 5, spinning process: the spinning solution is injected into the spinneret, and the ejected fibers enter the alkaline coagulation bath for coagulation; Step 6, post-processing: washing, drying, winding and packaging the blended fibers obtained by spinning.

2. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: The stirring temperature in step 3 is 60° C. and the stirring time is 15-30 min.

3. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: In step 4, the spinning solution is accurately configured with a concentration of 15%-16%, and the viscosity is controlled according to the actual use scenario and temperature. The degassing requires the processing of bubbles according to the stirring control time in step 3.

4. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: The solution formula of the alkaline coagulation bath in step 5 is specifically: alkali, alcohol and water.

5. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: The stirring in step 3 can be carried out by mechanical stirring and ultrasonic treatment.

6. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: The sericin is synthesized by secretion from the silk glands of silkworms.

7. The method for preparing sericin polyvinyl alcohol fiber according to claim 1, characterized in that: In step 1, the dissolution time of sericin is 15-20 minutes at a temperature of 80-98° C., and the dissolution temperature of polyvinyl alcohol is 98° C. for 15-30 minutes.