WO2021184566A1 - Chitin polyester master batch and preparation process therefor - Google Patents

Abstract

The present invention provides a preparation method for chitin polyester master batch. The chitin content of the chitin polyester master batch is 0.1-5%. The preparation method comprises the following steps: selection of raw materials, chitin modification, preparation of a loading agent, chitin loading, post-treatment of chitin functional modified powder, and preparation of the chitin polyester master batch. The chitin modification comprises: dissolving chitin in a 32-35 wt% of a sodium hydroxide solution, performing heat preservation for 7-8 h at the temperature of 60-62°C, and obtaining a first solution; and adding a modifier into the first solution, performing stirring at the temperature of 35-40°C for 25-30 min at a stirring speed of 800-1000 rpm, and forming a chitin modified solution. According to the present invention, the dispersion degree and uniformity degree of chitin in the chitin polyester master batch are significantly improved, and the obtained chitin polyester master batch has a significant antibacterial effect.

Description

Chitin polyester masterbatch and preparation process thereof Technical field

The invention belongs to the technical field of fiber manufacturing, and specifically relates to a chitin polyester masterbatch and a preparation process thereof.

Background technique

People's knowledge of chitin has gone through a long time. Since 1811, French scholar Henli Brocronnat. first isolated and extracted chitin from mushrooms. By 1859, Rouget, France, discovered that chitin was soluble in organic acids. Since then, the world has a preliminary understanding of chitin. Since the 1960s, research on chitin has become very active. In 1982, Japan included Kezol in the 1982-1992 10-year development plan. In 1984, Japan allocated 5 billion US dollars to commission 13 universities to exchange and develop chitin. In 1986, scientists at the University of Washington in the United States first discovered that chitin is a physiologically active substance. This discovery has laid a theoretical foundation for the future development and development of chitin, and has attracted worldwide attention in particular.

Chitin is a kind of polysaccharide biopolymer, which is widely found in lower biological fungi, algae cells, shells of arthropod shrimp, crabs, insects, and inner shells of mollusks (such as squid and squid) in nature. As well as cartilage, cell walls of higher plants, etc., chitin has an annual biosynthetic resource of 200 billion tons. It is the second largest biological resource on the earth after plant fibers, and is an inexhaustible biological resource for mankind. Chitin is a natural macromolecule polymer, belonging to amino polysaccharides, its scientific name is [(1.4)-2-acetylamino-2-deoxy-β-D-glucose], and its molecular formula is (C8H13NO5)n, between monomers It is connected by β(1-4) glycosidic bonds, the molecular weight is generally about 10 6 and the theoretical nitrogen content is 6.9%. Chitin has three crystal forms: α, β, and γ, among which α-chitin is the most abundant and stable. Due to the strong hydrogen bonding between macromolecules, it is generally insoluble in water and has very stable chemical properties, so its application is limited. It is usually called chitin. In nature, chitin is mostly closely combined with inorganic salts and proteins that are insoluble in water. In order to obtain chitin, people often treat the shells of crustaceans with acid and alkali to remove calcium salts and proteins. After obtaining the above chitin, the acetyl group in the molecule is removed by using a strong base under heating conditions to convert it into Soluble chitosan is usually called chitin. Because the chemical structure of chitin is very similar to the cellulose structure widely existing in plants, it is also called animal cellulose.

This year, chitin has been used in the textile field. The main process is to prepare chitin into antibacterial agents and spray or soak fabrics. However, the fabric prepared by this method has poor adhesion and is easy to lose during washing. Therefore, people began to study the addition of chitin to polyester fibers, but polyester fibers require high-temperature spinning, and chitin is prone to high-temperature carbonization in this process, leading to loss of antibacterial effect.

The prior art has the following technical defects: (1) Chitin is carbonized at high temperature during the polyester melt spinning process; (2) Chitin is lost severely during the washing process; (3) Chitin dispersion and uniformity are low, resulting in antibacterial The rate is low.

Summary of the invention

In order to solve the problems in the prior art and further optimize the existing process, the present invention provides a chitin polyester masterbatch and a preparation process thereof to achieve the following invention objectives:

(1) Improve the dispersion and uniformity of chitin in the masterbatch, and increase the inhibitory rate of the masterbatch against Staphylococcus aureus, Escherichia coli and Candida albicans;

(2) Improve the resistance to high temperature carbonization of the masterbatch;

(3) Improve the anti-washing performance of the masterbatch.

To solve the above technical problems, the present invention adopts the following technical solutions:

A method for preparing chitin polyester masterbatch, which is characterized in that it comprises the following steps:

The chitin polyester masterbatch has a chitin content of 0.1-5%.

1. Selection of raw materials

Selected polyester masterbatch: purity 98%, light fastness level 7, particle diameter 0.5-0.6cm.

Selected chitin: the effective substance content is 99%, and the fineness is 1200 mesh.

2. Chitin modification

Dissolve chitin in a 32-35wt% sodium hydroxide solution and keep it at 60-62°C for 7-8 hours to obtain the first solution; the mass ratio of chitin to sodium hydroxide solution is 1:3- 3.5;

Mix sucrase, sodium sulfite, acetic acid, and sodium lauryl sulfate, and stir at room temperature for 20-25 minutes, with a stirring speed of 600-700 rpm, to obtain a modifier;

The invertase: enzyme activity is 50,000 u/g, and the enzyme activity preservation rate is 95%;

The mass ratio of the sucrase, potassium persulfate, acetic acid, and sodium lauryl sulfate is 4-5:1-2:1-2:13-15;

The modifier is added to the first solution, and the mixture is stirred at 35-40° C. for 25-30 minutes at a stirring rate of 800-1000 rpm to form a chitin modified solution.

The added amount of the modifier is 20-28% of the mass of the first solution.

3. Preparation of loading agent

The wood powder activated carbon and diatomaceous earth are mixed in a ratio of 1:3-4, and the obtained mixture is ground in a grinder to 9200 mesh powder. The powder is treated at a high temperature at 200°C for 8-10 seconds, and placed to cool to room temperature to obtain a supporting agent.

The wood powder activated carbon: particle size is 500 mesh, bulk density is 550-580g/cm ³ , moisture content is 5-8%;

Said diatomaceous earth: containing 1-1.5% of ferric oxide, loose density 0.6-0.7g/cm ³ , pH value of 8, and fineness of 250-300 mesh.

4. Chitin loading

The chitin modified liquid and the loading agent are mixed in a mass ratio of 10:1-1.5, and the resulting mixed liquid is stirred at 1800-2000rpm for 1-1.5h; then the mixed liquid is heat-treated at 80-85℃ for 50-60min ; After standing and cooling to room temperature, the mixed solution is suction filtered to retain the precipitate. The above precipitation is dried to a water content of 7-9% to obtain a modified chitin powder.

5. Post-processing of chitin functional modified powder

Add chitin functional modified powder to the post-treatment liquid, the mass ratio of chitin functional modified powder to post-treatment liquid is 1:20; increase the temperature to 58-65°C, turn on the stirring, and the stirring rate is 2000 -2500rpm, stirring time is 20-28min; then centrifugal separation; after separating the solid phase, heat treatment at 130-140℃ for 10-20s; heat-treated solid phase is dried at low temperature at 50-55℃ To 8-12% water content.

The post-treatment liquid is mixed with sodium carbonate, dibutyltin dilaurate, sodium borate, glycerin, and water in a mass ratio of 3-4:5-6:0.5-1:2-4:18-20.

6. Preparation of chitin polyester masterbatch

The post-processed chitin functional modified powder is mixed with polyester chips, polyvinylpyrrolidone, and sodium carboxymethyl cellulose in parts by weight, and then added to the ultrasonic generator, and mixed at a mixing temperature of 120℃-130℃ 40-50min, then put the mixed materials into the twin-screw extruder to melt and blend for 30-40min, the melting temperature is controlled at 245-252℃, the screw speed is 250-280 rpm, extruding, cooling, pelletizing, After drying, a chitin polyester masterbatch is obtained.

The raw material weight ratio of the chitin polyester masterbatch is: 16-19 parts of chitin functional modified material, 60-70 parts of polyester chips, 5-7 parts of polyvinylpyrrolidone, 4-6 parts of sodium carboxymethyl cellulose share.

By adopting the above technical solution, the beneficial effects of the present invention are as follows:

1. The chitin dispersion and uniformity of the chitin-polyester masterbatch of the present invention are significantly improved, and the obtained chitin-polyester masterbatch has significant antibacterial effect, and the antibacterial rates against Staphylococcus aureus, Escherichia coli and Candida albicans are respectively Reach 97.50-98.50%, 99.50-99.55%, 98.55-99.50%;

2. The chitin polyester masterbatch is prepared by the preparation method of the present invention, and the chitin is well protected, and the temperature of resistance to high-temperature carbonization is significantly increased. After tests, the chitin polyester masterbatch of the present invention is melted at 260°C for 30-40 minutes. The element is not carbonized, and carbon black is not visible to the naked eye.

3. The chitin-polyester masterbatch is prepared by the preparation method of the present invention, and the adhesion of chitin is strong. After testing, the chitin-polyester masterbatch of the present invention is washed in 10 times distilled water for 500h, and the stirring speed of the lotion is 1500-1800rpm; Later, the antibacterial rate of chitin polyester masterbatch reached 94.50-95.55%, and there was no obvious loss of chitin.

4. The chitin polyester masterbatch prepared by the preparation method of the present invention has a good antistatic effect, and the fabric prepared by using the present invention can have obvious antistatic performance, which is beneficial to human health.

Detailed ways:

The present invention will be further explained below in conjunction with specific embodiments.

Example 1 A preparation method of chitin polyester masterbatch

A preparation method of chitin polyester masterbatch includes the following steps:

1. Selection of raw materials

Selected polyester masterbatch: purity 98%, light fastness level 7, particle diameter 0.5-0.6cm.

Selected chitin: the effective substance content is 99%, and the fineness is 1200 mesh.

2. Chitin modification

The chitin was dissolved in a 32wt% sodium hydroxide solution and kept at 60°C for 7 hours to obtain the first solution; the mass ratio of the chitin to the sodium hydroxide solution was 1:3.

Mix sucrase, sodium sulfite, acetic acid, and sodium lauryl sulfate, and stir at room temperature for 20 minutes, with a stirring speed of 600 rpm, to obtain a modifier;

The invertase: enzyme activity is 50,000 u/g, and the enzyme activity preservation rate is 95%;

The mass ratio of the sucrase, potassium persulfate, acetic acid, and sodium lauryl sulfate is 4.5:2:2:14.

The modifier was added to the first solution and stirred at 35° C. for 25 minutes at a stirring rate of 800 rpm to form a chitin modified solution.

The added amount of the modifier is 20% of the mass of the first solution.

3. Preparation of loading agent

The wood powder activated carbon and diatomaceous earth are mixed in a ratio of 1:3, and the obtained mixture is ground in a grinder to 9200 mesh powder. The powder is treated at a high temperature at 200° C. for 8 s, and placed to cool to room temperature to obtain a supporting agent.

The wood powder activated carbon: particle size is 500 mesh, bulk density is 550-580g/cm ³ , moisture content is 5-8%;

Said diatomaceous earth: containing 1-1.5% of ferric oxide, loose density 0.6-0.7g/cm ³ , pH value of 8, and fineness of 250-300 mesh.

4. Chitin loading

The chitin modified liquid and the loading agent were mixed in a mass ratio of 10:1, and the resulting mixed liquid was stirred at 1800 rpm for 1 h; then the mixed liquid was heat-treated at 80°C for 50 min; after standing and cooling to room temperature, the mixed liquid Filter with suction to retain the precipitate. The above precipitation is dried to a water content of 7% to obtain a modified chitin powder.

5. Post-processing of chitin functional modified powder

Add chitin functionally modified powder to the post-treatment liquid, the mass ratio of chitin functionally modified powder to post-treatment liquid is 1:20; increase the temperature to 58℃, turn on the stirring, the stirring rate is 2000rpm, and stir The time is 20min; then centrifugal separation is performed; after the solid phase is separated, it is heat-treated at 130°C for 10s; the heat-treated solid phase is dried at a low temperature at 50°C to a moisture content of 8%.

The post-treatment liquid is made by mixing sodium carbonate, dibutyltin dilaurate, sodium borate, glycerin, and water in a mass ratio of 3:5:0.5:3:18.

6. Preparation of chitin polyester masterbatch

The post-processed chitin functional modified powder was mixed with polyester chips, polyvinylpyrrolidone, and sodium carboxymethyl cellulose in parts by weight, then added to the ultrasonic generator, mixed at a mixing temperature of 120 ℃ for 40 minutes, and then The mixed materials are added to a twin-screw extruder to melt and blend for 30 minutes, the melting temperature is controlled at 245°C, the screw speed is 250 rpm, extruded, cooled, pelletized, and dried to obtain a chitin polyester masterbatch.

The raw material weight ratio of the chitin polyester masterbatch is: 16 parts of chitin functional modified material, 60 parts of polyester chips, 5 parts of polyvinylpyrrolidone, and 6 parts of sodium carboxymethyl cellulose.

The chitin dispersion and uniformity of the chitin polyester masterbatch of this example is significantly improved, and has a significant antibacterial effect. The antibacterial rates against Staphylococcus aureus, Escherichia coli, and Candida albicans reach 97.50%, 99.50%, and 98.55, respectively. %; in the chitin polyester masterbatch, chitin is well protected, and the temperature of resistance to high-temperature carbonization is significantly increased. After tests, the chitin polyester masterbatch of the present invention is melted at 260°C for 30 minutes, and the chitin is not carbonized. No carbon black adhesion can be seen. The chitin-polyester masterbatch has strong adhesion. After tests, the chitin-polyester masterbatch of the present invention is washed in 10 times distilled water for 500h, and the stirring speed of the lotion is 1500rpm; after washing, the chitin-polyester masterbatch is The antibacterial rate reached 94.50%, and there was no obvious loss of chitin. The chitin-polyester masterbatch has a good antistatic effect, and the fabric prepared by applying the invention can have obvious antistatic performance, which is beneficial to human health.

Example 2 A preparation method of chitin polyester masterbatch

A preparation method of chitin polyester masterbatch includes the following steps:

1. Selection of raw materials

Selected polyester masterbatch: purity 98%, light fastness level 7, particle diameter 0.5-0.6cm.

Selected chitin: the effective substance content is 99%, and the fineness is 1200 mesh.

2. Chitin modification

Dissolving chitin in a 33wt% sodium hydroxide solution and keeping it at 61°C for 7.5 hours to obtain the first solution; the mass ratio of the chitin to the sodium hydroxide solution is 1:3.2;

Mix sucrase, sodium sulfite, acetic acid, and sodium lauryl sulfate, and stir at room temperature for 20 minutes, with a stirring speed of 650 rpm, to obtain a modifier;

The invertase: enzyme activity is 50,000 u/g, and the enzyme activity preservation rate is 95%;

The mass ratio of the sucrase, potassium persulfate, acetic acid, and sodium lauryl sulfate is 4:1:1:13;

The modifier was added to the first solution and stirred at 38° C. for 28 minutes at a stirring rate of 900 rpm to form a chitin modified solution.

The added amount of the modifier is 25% of the mass of the first solution.

3. Preparation of loading agent

The wood powder activated carbon and diatomaceous earth are mixed in a ratio of 1:3, and the obtained mixture is ground in a grinder to 9200 mesh powder. The powder was treated at a high temperature of 200°C for 9s, and placed to cool to room temperature to obtain a supporting agent.

The wood powder activated carbon: particle size is 500 mesh, bulk density is 550-580g/cm ³ , moisture content is 5-8%;

Said diatomaceous earth: containing 1-1.5% of ferric oxide, loose density 0.6-0.7g/cm ³ , pH value of 8, and fineness of 250-300 mesh.

4. Chitin loading

The chitin modified liquid and the loading agent were mixed at a mass ratio of 10:1, and the resulting mixture was stirred at 1900rpm for 1.5h; then the mixture was heat-treated at 82°C for 55min; after standing and cooling to room temperature, the mixture was mixed The liquid is suction filtered to retain the precipitate. The above precipitation is dried to a water content of 8% to obtain a modified chitin powder.

5. Post-processing of chitin functional modified powder

Add chitin functionally modified powder to the post-treatment liquid, the mass ratio of chitin functionally modified powder to post-treatment liquid is 1:20; heat up to 60℃, turn on the stirring, the stirring rate is 2300rpm, stir The time is 25min; then centrifugal separation is performed; after the solid phase is separated, it is heat-treated at 150°C for 15s; the heat-treated solid phase is dried at a low temperature at 52°C to a water content of 10%.

The post-treatment liquid is made by mixing sodium carbonate, dibutyltin dilaurate, sodium borate, glycerin, and water in a mass ratio of 4:5.5:0.8:3:19.

6. Preparation of chitin polyester masterbatch

The post-processed chitin functional modified powder was mixed with polyester chips, polyvinylpyrrolidone, and sodium carboxymethyl cellulose in parts by weight, and then added to the ultrasonic generator, mixed at a mixing temperature of 125 ℃ for 45 minutes, and then The mixed materials are added to a twin-screw extruder to melt and blend for 35 minutes, the melting temperature is controlled at 249°C, and the screw speed is 270 revolutions per minute. After extrusion, cooling, pelletizing, and drying, a chitin polyester masterbatch is obtained.

The raw material weight ratio of the chitin polyester masterbatch is: 18 parts of chitin functional modified material, 65 parts of polyester chips, 6 parts of polyvinylpyrrolidone, and 5 parts of sodium carboxymethyl cellulose.

The chitin dispersion and uniformity of the chitin polyester masterbatch of this example is significantly improved, and has a significant antibacterial effect. The antibacterial rates against Staphylococcus aureus, Escherichia coli, and Candida albicans reach 97.55%, 99.50%, and 99.50, respectively. %; In the chitin polyester masterbatch, chitin is well protected, and the temperature of resistance to high-temperature carbonization is significantly increased. After tests, the chitin polyester masterbatch of the present invention is melted at 260°C for 40 minutes, and the chitin is not carbonized. No carbon black adhesion can be seen. The chitin-polyester masterbatch has strong adhesion. After tests, the chitin-polyester masterbatch of the present invention is washed in 10 times distilled water for 500h, and the stirring speed of the lotion is 1800rpm; The antibacterial rate reached 95.55%, and there was no obvious loss of chitin. The chitin-polyester masterbatch has a good antistatic effect, and the fabric prepared by applying the invention can have obvious antistatic performance, which is beneficial to human health.

Example 3 A preparation method of chitin polyester masterbatch

A preparation method of chitin polyester masterbatch includes the following steps:

1. Selection of raw materials

Selected polyester masterbatch: purity 98%, light fastness level 7, particle diameter 0.5-0.6cm.

Selected chitin: the effective substance content is 99%, and the fineness is 1200 mesh.

2. Chitin modification

Dissolving chitin in a 35wt% sodium hydroxide solution and keeping it at 62°C for 8 hours to obtain a first solution; the mass ratio of chitin to sodium hydroxide solution is 1:3.5;

Mix sucrase, sodium sulfite, acetic acid, and sodium lauryl sulfate, and stir at room temperature for 25 minutes, with a stirring speed of 700 rpm, to obtain a modifier;

The invertase: enzyme activity is 50,000 u/g, and the enzyme activity preservation rate is 95%;

The mass ratio of the sucrase, potassium persulfate, acetic acid, and sodium lauryl sulfate is 5:1.5:1:15;

The modifier was added to the first solution and stirred at 40° C. for 30 minutes at a stirring rate of 1000 rpm to form a chitin modified solution.

The added amount of the modifier is 28% of the mass of the first solution.

3. Preparation of loading agent

The wood powder activated carbon and diatomaceous earth are mixed in a ratio of 1:3, and the obtained mixture is ground in a grinder to 9200 mesh powder. The powder is treated at a high temperature at 200°C for 10 seconds, and placed to cool down to room temperature to obtain a supporting agent.

The wood powder activated carbon: particle size is 500 mesh, bulk density is 550-580g/cm ³ , moisture content is 5-8%;

Said diatomaceous earth: containing 1-1.5% of ferric oxide, loose density 0.6-0.7g/cm ³ , pH value of 8, and fineness of 250-300 mesh.

4. Chitin loading

The chitin modified liquid and the loading agent were mixed at a mass ratio of 10:1, and the resulting mixture was stirred at 2000 rpm for 1.5 hours; then the mixture was heat-treated at 85°C for 60 minutes; after standing and cooling to room temperature, the mixture was mixed The liquid is suction filtered to retain the precipitate. The above precipitation is dried to a water content of 9% to obtain a modified chitin powder.

5. Post-processing of chitin functional modified powder

Add chitin functional modified powder to the post-treatment liquid, the mass ratio of chitin functional modified powder to post-treatment liquid is 1:20; increase the temperature to 65°C, turn on the stirring, the stirring rate is 2500rpm, and stir The time is 28min; then centrifugal separation is performed; after the solid phase is separated, it is heat-treated at 140°C for 20s; the heat-treated solid phase is dried at a low temperature at 55°C to a water content of 12%.

The post-treatment liquid is made by mixing sodium carbonate, dibutyltin dilaurate, sodium borate, glycerin, and water in a mass ratio of 3:5:1:2:20.

6. Preparation of chitin polyester masterbatch

The post-processed chitin functional modified powder was mixed with polyester chips, polyvinylpyrrolidone, and sodium carboxymethyl cellulose in parts by weight, and then added to the ultrasonic generator, mixed at a mixing temperature of 130 ℃ for 50 minutes, and then The mixed materials were added to a twin-screw extruder to melt and blend for 40 minutes, the melting temperature was controlled at 252°C, the screw speed was 280 rpm, extruded, cooled, pelletized, and dried to obtain a chitin polyester masterbatch.

The raw material weight ratio of the chitin polyester masterbatch is: 19 parts of chitin functional modified material, 70 parts of polyester chips, 7 parts of polyvinylpyrrolidone, and 6 parts of sodium carboxymethyl cellulose.

The chitin dispersion and uniformity of the chitin polyester masterbatch of this example is significantly improved, and has a significant antibacterial effect. The antibacterial rates against Staphylococcus aureus, Escherichia coli, and Candida albicans reach 98.50%, 99.55%, and 99.50, respectively. %; In the chitin polyester masterbatch, chitin is well protected, and the temperature of resistance to high-temperature carbonization is significantly increased. After tests, the chitin polyester masterbatch of the present invention is melted at 260°C for 40 minutes, and the chitin is not carbonized. No carbon black adhesion can be seen. The chitin-polyester masterbatch has strong adhesion. After tests, the chitin-polyester masterbatch of the present invention is washed in 10 times distilled water for 500h, and the stirring speed of the lotion is 1800rpm; The antibacterial rate reached 95.55%, and there was no obvious loss of chitin. The chitin-polyester masterbatch has a good antistatic effect, and the fabric prepared by applying the invention can have obvious antistatic performance, which is beneficial to human health.

Finally, it should be noted that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A preparation method of chitin polyester masterbatch is characterized in that: the chitin content of the chitin polyester masterbatch is 0.1-5%.
2. The method for preparing chitin polyester masterbatch according to claim 1, characterized in that it comprises the following steps: selection of raw materials, chitin modification, preparation of supporting agent, chitin loading, chitin functional modification The post-treatment of powder and the preparation steps of chitin polyester masterbatch.
3. The method for preparing chitin polyester masterbatch according to claim 2, characterized in that: the chitin modification: chitin is dissolved in 32-35wt% sodium hydroxide solution, and the temperature is 60- Incubate at 62°C for 7-8 hours to obtain the first solution; add the modifier to the first solution, and stir at 35-40°C for 25-30 minutes at a stirring rate of 800-1000 rpm to form a chitin modified solution.
4. The method for preparing chitin polyester masterbatch according to claim 3, characterized in that: the modifier: mix sucrase, sodium sulfite, acetic acid, sodium lauryl sulfate, and stir at room temperature for 20 -25min, the stirring speed is 600-700rpm, and the modifier is obtained.
5. The method for preparing chitin polyester masterbatch according to claim 3, characterized in that: the added amount of the modifier is 20-28% of the mass of the first solution.
6. The method for preparing chitin polyester masterbatch according to claim 1, characterized in that: the preparation of the loading agent: mixing wood powder activated carbon and diatomaceous earth in a ratio of 1:3-4 to obtain a mixture Place the powder in a grinder to grind, and treat the powder at a high temperature at 200°C for 8-10 seconds, and place it to cool down to room temperature to obtain a supporting agent.
7. The method for preparing chitin polyester masterbatch according to claim 1, characterized in that: the chitin loading: mixing the chitin modified liquid and the loading agent in a mass ratio of 10:1-1.5 to obtain The mixed solution is stirred at 1800-2000rpm for 1-1.5h; then the mixed solution is heat-treated at 80-85℃ for 50-60min; after standing and cooling to room temperature, the mixed solution is suction filtered to retain the precipitate; the precipitate is dried to The water content is 7-9%, and the chitin functional modified powder is obtained.
8. The method for preparing chitin polyester masterbatch according to claim 1, characterized in that: the post-treatment of the chitin functionally modified powder: adding the chitin functionally modified powder to the post-treatment In the liquid; the temperature is raised to 58-65°C and the stirring is turned on; then the centrifugal separation is carried out; the solid phase is separated and then heat-treated; the heat-treated solid phase is dried at a low temperature at 50-55°C to a water content of 8-12%.
9. The method for preparing chitin polyester masterbatch according to claim 8, characterized in that: said stirring: stirring rate is 2000-2500rpm, stirring time is 20-28min; said heat treatment: heat treatment temperature is 130-140 ℃, heat treatment time is 10-20s.
10. The method for preparing chitin-polyester masterbatch according to claim 1, wherein the preparation of the chitin-polyester masterbatch is to combine the post-treated chitin functional modified powder with polyester chips and poly Vinylpyrrolidone and sodium carboxymethyl cellulose are mixed, then added to the ultrasonic generator, mixed at a mixing temperature of 120°C-130°C for 40-50 minutes, and then the mixed materials are added to the twin-screw extruder to melt and blend for 30-40 minutes. The melting temperature is controlled at 245-252°C, the screw speed is 250-280 rpm, and a chitin polyester masterbatch is obtained after extrusion, cooling, pelletizing and drying.