A biodegradable material containing BBM bamboo powder and its application in beer bottles

Abstract

The present invention relates to the technical field of biodegradable materials, and specifically discloses a biodegradable material for adding BBM bamboo powder and its application in beer bottles. The raw materials of the above-mentioned biodegradable material for adding BBM bamboo powder include by mass: 10-20 parts of polybutylene succinate, 10-30 parts of polybutylene adipate terephthalate, 10-20 parts of bamboo powder, 1-3 parts of dopamine hydrochloride, 0.1-0.5 parts of n-butylamine, 1-2 parts of hexadecyltrimethylammonium bromide, 1-5 parts of tetraethyl orthosilicate, 1-2 parts of tetrabutyl titanate, 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of antioxidant, and 1-2 parts of plasticizer. The BBM obtained by the present invention has excellent mechanical properties, while improving the anti-ultraviolet strength of degradable materials to a certain extent, and has good biodegradability.

Description

Technical Field

[0001] The invention relates to the technical field of biodegradable materials, in particular to a biodegradable material added with BBM bamboo powder and application thereof in beer bottles. Background Art

[0002] my country is a major beer producer and consumer, with a vast market for beer packaging. Existing beer packaging primarily comes in glass bottles and metal cans. Glass bottles are the primary packaging container. Glass is chemically inert and stable, virtually resisting any interaction with its contents. However, glass bottles have low impact strength, posing a risk of explosion and injury after filling, especially if the surface is damaged. Furthermore, they are heavy, difficult to carry, and expensive to transport.

[0003] Plastic bottles offer excellent properties, such as high strength, high transparency, light weight, and resistance to breakage. Currently, materials such as polycarbonate and polyethylene terephthalate have significantly improved their barrier properties, essentially meeting the requirements for beer packaging. They are widely used for carbonated beverages and drinking water, and are also used in beer bottles abroad. However, these plastics are not easily degradable and can easily pollute the environment after being discarded.

[0004] Bamboo flour, a renewable biomass resource, is an excellent choice for biodegradable products. Bamboo biodegradable material (BBM), made primarily from bamboo flour, is a natural biodegradable material produced by soil microorganisms. As a green, renewable resource, it exhibits excellent biodegradability and biocompatibility. However, its brittle texture and poor UV resistance limit its use.

[0005] How to blend bamboo powder with polybutylene succinate for use in beer bottles, while improving the mechanical strength of the beer bottles and enhancing their resistance to UV aging, thereby ensuring their performance, has become a technical problem that needs to be solved. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a biodegradable material with added BBM bamboo powder and its application in beer bottles.

[0007] A biodegradable material added with BBM bamboo powder. The raw materials thereof comprise, by mass, 10-20 parts of bamboo powder, 10-30 parts of polybutylene adipate-terephthalate, 10-20 parts of polybutylene succinate, 1-3 parts of dopamine hydrochloride, 0.1-0.5 parts of n-butylamine, 1-2 parts of hexadecyltrimethylammonium bromide, 1-5 parts of tetraethyl orthosilicate, 1-2 parts of tetrabutyl titanate, 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of an antioxidant, and 1-2 parts of a plasticizer.

[0008] Preferably, the antioxidant is at least one of antioxidant BHT, antioxidant DNP, antioxidant DLTP, antioxidant 1010, and antioxidant 168.

[0009] Preferably, the plasticizer is at least one of disproportionated rosin, epoxy soybean oil, dibutyltin dilaurate, acetyl tributyl citrate, and tricresyl phosphate.

[0010] Preferably, the mesh size of the bamboo powder is 1000-2000 mesh.

[0011] Preferably, the bamboo powder is obtained by sequentially crushing, extracting, filtering, concentrating, refining and purifying, drying and crushing moso bamboo with an age of 3-3.5 years.

[0012] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0013] S1. Treating the bamboo powder with low-temperature oxygen plasma for 5-15 seconds at a treatment power of 100-150 W, then adding the mixture and dopamine hydrochloride to a Tris-HCl buffer solution, ultrasonically treating the mixture for 1-2 hours, adjusting the pH value of the system to 7.5-8.5, stirring the mixture at 60-80° C. for 10-15 hours, centrifuging, washing, and vacuum drying the mixture to obtain pretreated bamboo powder;

[0014] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to water, stir at 80-90° C. for 10-20 min, add tetraethyl orthosilicate and continue stirring for 10-30 min, add tetrabutyl titanate and continue stirring for 1-2 h, centrifuge, wash, add methanol and concentrated hydrochloric acid, reflux in an oil bath for 1-2 h, centrifuge, wash with ethanol, vacuum dry, and calcine in a tube furnace, add 3-aminopropyltriethoxysilane and anhydrous ethanol, stir at 40-50° C. for 1-2 h, centrifuge, wash, and vacuum dry to obtain activated titanium dioxide;

[0015] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant, and plasticizer, and extrude the mixture.

[0016] Preferably, in S1, the concentration of the Tris-HCl buffer is 0.01-0.05 mol / L.

[0017] Preferably, in S1, the ultrasonic frequency is 5-15 kHz.

[0018] Preferably, in S2, the calcination temperature is 550-600°C, and the calcination time is 2-4 hours.

[0019] The above-mentioned biodegradable material with added BBM bamboo powder is used as a beer packaging material. Beneficial effects

[0020] 1. Traditional bamboo powder is relatively light and has high humidity, making it difficult to directly add to and modify plastic materials. The present invention uses bamboo powder prepared from moso bamboo, which is then activated and surface-bound with polydopamine. This effectively reduces the powder's polarity and enhances its interfacial compatibility with polybutylene adipate-terephthalate and polybutylene succinate. The resulting biodegradable material exhibits excellent toughening and mechanical properties. However, it suffers from poor anti-aging properties and is susceptible to degradation upon prolonged exposure to ultraviolet light.

[0021] 2. The present invention adopts a template method to form nano-titanium dioxide. After amino treatment, the surface energy of titanium dioxide nanoparticles can be effectively reduced, and the dispersion performance between polybutylene adipate-terephthalate, polybutylene succinate, and pretreated bamboo powder can be increased. It effectively avoids the agglomeration of titanium dioxide and can be evenly dispersed in the matrix. With the effect of nano-silicon dioxide, the specific surface area is very high, which can effectively increase the contact area with the polymer matrix, not only reducing the interface defects with the polymer matrix, but also having excellent toughening effect, and at the same time having good anti-ultraviolet aging performance, and has excellent prospects for use in beer bottles.

[0022] 3. The present invention effectively improves the dispersibility and compatibility of bamboo powder in polybutylene succinate, effectively improving the mechanical properties of the BBM, resulting in excellent mechanical properties, while also enhancing the UV resistance of the degradable material to a certain extent. The present invention also provides bamboo, which is widely available and easily harvested, grows rapidly, is environmentally friendly, and can be quickly decomposed when buried in the soil after use, exhibiting excellent biodegradability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a comparison chart of the tensile strength and the tensile strength retention rate after UV aging of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2.

[0024] Figure 2 This is a comparison chart of the flexural strength and flexural strength retention rate after UV aging of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2.

[0025] Figure 3 This is a comparison chart of the notched impact strength and the notched impact strength retention rate after UV aging of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2.

[0026] Figure 4 This is a comparison chart of the weight loss rate of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 after burying in the soil for 60 days and the number of days required for complete degradation. DETAILED DESCRIPTION

[0027] The present invention will be further explained below with reference to specific embodiments.

[0028] The bamboo powder used below is produced by the applicant using 3-3.5 year old moso bamboo through a multi-step process of crushing-extraction-filtration-concentration-refining and purification-drying-re-crushing, and then passed through a 500-mesh sieve. Example 1

[0029] A biodegradable material containing BBM bamboo powder is provided. The raw materials of the material include: 10 g of polybutylene adipate-terephthalate, 10 g of polybutylene succinate, 10 g of bamboo powder, 1 g of dopamine hydrochloride, 0.1 g of n-butylamine, 1 g of hexadecyltrimethylammonium bromide, 1 g of tetraethyl orthosilicate, 1 g of tetrabutyl titanate, 1 g of 3-aminopropyltriethoxysilane, 1 g of antioxidant 168, and 1 g of epoxidized soybean oil.

[0030] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0031] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 5 seconds at a treatment power of 100 W. The bamboo powder and dopamine hydrochloride were added to 50 g of a 0.01 mol / L Tris-HCl buffer solution, and ultrasonically treated for 1 hour at an ultrasonic frequency of 5 kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 60° C., and the mixture was stirred at a speed of 100 r / min for 10 hours. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0032] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 10 g of water, stir at 80 ° C for 10 min, and stir at a speed of 100 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 10 min, add tetrabutyl titanate thereto, continue stirring for 1 h, centrifuge, wash with ethanol, add 10 g of methanol and 1 g of 30% concentrated hydrochloric acid by mass, reflux in an oil bath for 1 h, centrifuge, wash with ethanol, vacuum dry, and send into a tube furnace for calcination. Add 3-aminopropyltriethoxysilane and 10 g of anhydrous ethanol, stir at 40 ° C for 1 h, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0033] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant 168, and epoxidized soybean oil, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 190° C., and the main screw speed is 400 rpm. Example 2

[0034] A biodegradable material added with BBM bamboo powder comprises raw materials including: 30g of polybutylene adipate-terephthalate, 20g of polybutylene succinate, 20g of bamboo powder, 3g of dopamine hydrochloride, 0.5g of n-butylamine, 2g of cetyltrimethylammonium bromide, 5g of tetraethyl orthosilicate, 2g of tetrabutyl titanate, 2g of 3-aminopropyltriethoxysilane, 2g of DNP antioxidant, and 2g of dibutyltin dilaurate.

[0035] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0036] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 15 seconds at a treatment power of 150W. The bamboo powder was added with dopamine hydrochloride to 100 g of a 0.05 mol / L Tris-HCl buffer solution, and ultrasonically treated for 2 hours at an ultrasonic frequency of 15 kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 80°C, and the mixture was stirred at a speed of 500 r / min for 15 hours. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0037] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 30 g of water, stir at 90 ° C for 20 min, and stir at a speed of 500 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 30 min, add tetrabutyl titanate thereto, continue stirring for 2 h, centrifuge, wash with ethanol, add 20 g of methanol and 3 g of concentrated hydrochloric acid with a mass fraction of 35%, reflux in an oil bath for 2 h, centrifuge, wash with ethanol, vacuum dry, and send into a tube furnace for calcination. Add 3-aminopropyltriethoxysilane and 30 g of anhydrous ethanol, stir at 50 ° C for 2 h, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0038] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant DNP, and dibutyltin dilaurate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 210° C., and the main screw speed is 600 rpm. Example 3

[0039] A biodegradable material added with BBM bamboo powder, the raw materials of which include: 25g of polybutylene adipate-terephthalate, 12g of polybutylene succinate, 17g of bamboo powder, 1.5g of dopamine hydrochloride, 0.2g of n-butylamine, 1.7g of hexadecyltrimethylammonium bromide, 2g of tetraethyl orthosilicate, 1.7g of tetrabutyl titanate, 1.2g of 3-aminopropyltriethoxysilane, 1.7g of antioxidant DLTP, and 1.2g of tricresyl phosphate.

[0040] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0041] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 12 seconds at a treatment power of 110 W. The bamboo powder and dopamine hydrochloride were added to 90 g of a 0.02 mol / L Tris-HCl buffer solution, and ultrasonically treated for 100 minutes at an ultrasonic frequency of 9 kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 75° C., and the mixture was stirred at a speed of 200 r / min for 13 hours. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0042] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 15 g of water, stir at a temperature of 88 ° C for 12 min, and stir at a speed of 400 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 15 min, add tetrabutyl titanate thereto, continue stirring for 100 min, centrifuge, wash with ethanol, add 12 g of methanol and 2 g of concentrated hydrochloric acid with a mass fraction of 32%, reflux in an oil bath for 100 min, centrifuge, wash with ethanol, vacuum dry, and send into a tube furnace for calcination. Add 3-aminopropyltriethoxysilane and 15 g of anhydrous ethanol, stir at a temperature of 48 ° C for 80 min, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0043] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant DLTP, and tricresyl phosphate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 205° C., and the main screw speed is 450 rpm. Example 4

[0044] A biodegradable material added with BBM bamboo powder, the raw materials of which include: 15g of polybutylene adipate-terephthalate, 18g of polybutylene succinate, 13g of bamboo powder, 2.5g of dopamine hydrochloride, 0.4g of n-butylamine, 1.3g of hexadecyltrimethylammonium bromide, 4g of tetraethyl orthosilicate, 1.3g of tetrabutyl titanate, 1.8g of 3-aminopropyltriethoxysilane, 1.3g of antioxidant 1010, and 1.8g of acetyl tributyl citrate.

[0045] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0046] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 8 seconds at a treatment power of 130W. The bamboo powder and dopamine hydrochloride were added to 70g of a 0.04mol / L Tris-HCl buffer solution, and ultrasonically treated for 80min at an ultrasonic frequency of 12kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 65°C, and the mixture was stirred at a speed of 400r / min for 11h. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0047] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 25 g of water, stir at a temperature of 82 ° C for 18 min, and stir at a speed of 200 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 25 min, add tetrabutyl titanate thereto, continue stirring for 80 min, centrifuge, wash with ethanol, add 18 g of methanol and 2 g of concentrated hydrochloric acid with a mass fraction of 32%, reflux in an oil bath for 80 min, centrifuge, wash with ethanol, vacuum dry, and send into a tube furnace for calcination. Add 3-aminopropyltriethoxysilane and 25 g of anhydrous ethanol, stir at a temperature of 42 ° C for 100 min, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0048] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant 1010, and acetyl tributyl citrate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 195° C., and the main screw speed is 550 rpm. Example 5

[0049] A biodegradable material added with BBM bamboo powder comprises raw materials including: 20g of polybutylene adipate-terephthalate, 15g of polybutylene succinate, 15g of bamboo powder, 2g of dopamine hydrochloride, 0.3g of n-butylamine, 1.5g of cetyltrimethylammonium bromide, 3g of tetraethyl orthosilicate, 1.5g of tetrabutyl titanate, 1.5g of 3-aminopropyltriethoxysilane, 1.5g of BHT (an antioxidant), and 1.5g of acetyl tributyl citrate.

[0050] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0051] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 10 seconds at a treatment power of 120W. The bamboo powder and dopamine hydrochloride were added to 80g of a 0.03mol / L Tris-HCl buffer solution, and ultrasonically treated for 90 minutes at an ultrasonic frequency of 10.5kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 70°C, and the mixture was stirred at a speed of 300r / min for 12 hours. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0052] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 20 g of water, stir at a temperature of 85 ° C for 15 min, and stir at a speed of 300 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 20 min, add tetrabutyl titanate thereto, continue stirring for 90 min, centrifuge, wash with ethanol, add 15 g of methanol and 2 g of concentrated hydrochloric acid with a mass fraction of 32%, reflux in an oil bath for 90 min, centrifuge, wash with ethanol, vacuum dry, send into a tube furnace, calcined at a temperature of 580 ° C for 3 h, add 3-aminopropyltriethoxysilane and 20 g of anhydrous ethanol, stir at a temperature of 45 ° C for 90 min, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0053] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant BHT, and acetyl tributyl citrate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 200° C., and the main screw speed is 500 rpm.

[0054] Comparative Example 1

[0055] A biodegradable material added with BBM bamboo powder comprises raw materials including: 20g of polybutylene adipate-terephthalate, 15g of polybutylene succinate, 15g of bamboo powder, 2g of dopamine hydrochloride, 0.3g of n-butylamine, 1.5g of cetyltrimethylammonium bromide, 3g of tetraethyl orthosilicate, 1.5g of tetrabutyl titanate, 1.5g of 3-aminopropyltriethoxysilane, 1.5g of BHT (an antioxidant), and 1.5g of acetyl tributyl citrate.

[0056] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0057] S1. Add bamboo powder and dopamine hydrochloride to 80 g of 0.03 mol / L Tris-HCl buffer, ultrasonically treat for 90 min at an ultrasonic frequency of 10.5 kHz, adjust the pH value of the system to 7.5-8.5 with ammonia water, adjust the temperature to 70° C., stir at a speed of 300 rpm for 12 h, centrifuge, wash, and vacuum dry to obtain pretreated bamboo powder;

[0058] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 20 g of water, stir at a temperature of 85 ° C for 15 min, and stir at a speed of 300 r / min. Add tetraethyl orthosilicate thereto, continue stirring for 20 min, add tetrabutyl titanate thereto, continue stirring for 90 min, centrifuge, wash with ethanol, add 15 g of methanol and 2 g of concentrated hydrochloric acid with a mass fraction of 32%, reflux in an oil bath for 90 min, centrifuge, wash with ethanol, vacuum dry, send into a tube furnace, calcined at a temperature of 580 ° C for 3 h, add 3-aminopropyltriethoxysilane and 20 g of anhydrous ethanol, stir at a temperature of 45 ° C for 90 min, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0059] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant BHT, and acetyl tributyl citrate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 200° C., and the main screw speed is 500 rpm.

[0060] Comparative Example 2

[0061] A biodegradable material added with BBM bamboo powder comprises raw materials including: 20g of polybutylene adipate-terephthalate, 15g of polybutylene succinate, 15g of bamboo powder, 2g of dopamine hydrochloride, 0.3g of n-butylamine, 1.5g of cetyltrimethylammonium bromide, 3g of tetraethyl orthosilicate, 1.5g of tetrabutyl titanate, 1.5g of 3-aminopropyltriethoxysilane, 1.5g of BHT (an antioxidant), and 1.5g of acetyl tributyl citrate.

[0062] The method for preparing the biodegradable material with added BBM bamboo powder comprises the following steps:

[0063] S1. The bamboo powder was treated in a low-temperature oxygen plasma treatment apparatus for 10 seconds at a treatment power of 120W. The bamboo powder and dopamine hydrochloride were added to 80g of a 0.03mol / L Tris-HCl buffer solution, and ultrasonically treated for 90 minutes at an ultrasonic frequency of 10.5kHz. The pH value of the system was adjusted to 7.5-8.5 with ammonia water, the temperature was adjusted to 70°C, and the mixture was stirred at a speed of 300r / min for 12 hours. The mixture was centrifuged, washed, and vacuum-dried to obtain the pretreated bamboo powder.

[0064] S2. Add n-butylamine and hexadecyltrimethylammonium bromide to 20 g of water, stir at 85 ° C for 15 min, and stir at a speed of 300 r / min. Add tetrabutyl titanate thereto, continue stirring for 90 min, centrifuge, wash with ethanol, add 15 g of methanol and 2 g of concentrated hydrochloric acid with a mass fraction of 32%, reflux in an oil bath for 90 min, centrifuge, wash with ethanol, vacuum dry, send into a tube furnace, calcined at 580 ° C for 3 h, add 3-aminopropyltriethoxysilane and 20 g of anhydrous ethanol, stir at 45 ° C for 90 min, centrifuge, wash with ethanol, and vacuum dry to obtain activated titanium dioxide;

[0065] S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant BHT, and acetyl tributyl citrate, and feed the mixture into a twin-screw extruder for extrusion. The extrusion temperature of the twin-screw extruder is 200° C., and the main screw speed is 500 rpm.

[0066] The tensile strength of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 was measured with reference to GB / T 1040.2-2022 “Determination of tensile properties of plastics Part 2: Test conditions for molded and extruded plastics”.

[0067] The flexural strength of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 was measured with reference to GB / T 9341-2008 “Determination of flexural properties of plastics”.

[0068] The notched impact strength of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 was measured with reference to GB / T 1043.1-2008 “Plastics — Determination of impact properties of a charpy beam — Part 1: Non-instrumented impact test”.

[0069] Subsequently, referring to GB / T 14522-2008 "Artificial weathering test method for plastics, coatings and rubber materials for mechanical industrial products - fluorescent ultraviolet lamp", the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 were placed in a UV aging test chamber for treatment at an irradiation intensity of 0.82 W / m 2 The irradiation time was 240 hours, with a constant temperature of 32°C and an exposure period of 8 hours for drying and 4 hours for condensation. The tensile strength, flexural strength, and impact strength of each group of UV-aged samples were measured again, and the retention rate of each strength was calculated.

[0070] Strength retention rate = strength after UV aging ÷ strength before UV aging × 100%

[0071] like Figure 1-Figure 3As shown, the tensile strength, flexural strength, notched impact strength and various strength retention rates of the biodegradable material obtained in Example 5 are the highest, which are better than those of Comparative Examples 1-2 (P < 0.05).

[0072] The biodegradable materials obtained in Example 5 and Comparative Examples 1-2 were made into standard strips measuring 100 mm × 10 mm × 1.0 mm. The weight of each standard strip was weighed and recorded. The standard strips were then wrapped in gauze and buried in soil 20 cm above the ground surface. After 60 days, the strips were removed, washed, dried, weighed, and the weight was recorded. The 60-day weight loss rate was then calculated. The number of days required for complete degradation was then measured; complete degradation was considered complete when the weight loss rate reached 98%.

[0073] 60-day weight loss rate (%) = (weight before test - weight after 60 days of burial in soil) ÷ weight before test × 100%

[0074] like Figure 4 As shown, the 60-day weight loss rate of the biodegradable materials obtained in Example 5 and Comparative Examples 1-2 can be degraded by more than 75% in 60 days, and can be completely degraded within 130 days, confirming that all three have excellent biodegradability.

[0075] The degradation period of the present invention after being discarded is short, and the application of the present invention in beer bottles has excellent prospects.

[0076] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A biodegradable material with added BBM bamboo powder, characterized in that: The raw materials include, by mass, 10-20 parts of polybutylene succinate, 10-30 parts of polybutylene adipate-terephthalate, 10-20 parts of bamboo powder, 1-3 parts of dopamine hydrochloride, 0.1-0.5 parts of n-butylamine, 1-2 parts of hexadecyltrimethylammonium bromide, 1-5 parts of tetraethyl orthosilicate, 1-2 parts of tetrabutyl titanate, 1-2 parts of 3-aminopropyltriethoxysilane, 1-2 parts of antioxidant, and 1-2 parts of plasticizer. The preparation method of the biodegradable material with added BBM bamboo powder comprises the following steps: S1. Treating the bamboo powder with low-temperature oxygen plasma for 5-15 seconds at a treatment power of 100-150 W, then adding the mixture and dopamine hydrochloride to a Tris-HCl buffer solution, ultrasonically treating the mixture for 1-2 hours, adjusting the pH value of the system to 7.5-8.5, stirring the mixture at 60-80° C. for 10-15 hours, centrifuging, washing, and vacuum drying the mixture to obtain pretreated bamboo powder; S2. Add n-butylamine and hexadecyltrimethylammonium bromide to water, stir at 80-90° C. for 10-20 min, add tetraethyl orthosilicate and continue stirring for 10-30 min, add tetrabutyl titanate and continue stirring for 1-2 h, centrifuge, wash, add methanol and concentrated hydrochloric acid, reflux in an oil bath for 1-2 h, centrifuge, wash with ethanol, vacuum dry, and calcine in a tube furnace, add 3-aminopropyltriethoxysilane and anhydrous ethanol, stir at 40-50° C. for 1-2 h, centrifuge, wash, and vacuum dry to obtain activated titanium dioxide; S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant, and plasticizer, and extrude the mixture.

2. The biodegradable material with added BBM bamboo powder according to claim 1, characterized in that: The antioxidant is at least one of antioxidant BHT, antioxidant DNP, antioxidant DLTP, antioxidant 1010, and antioxidant 168.

3. The biodegradable material with added BBM bamboo powder according to claim 1, characterized in that: The plasticizer is at least one of disproportionated rosin, epoxy soybean oil, dibutyltin dilaurate, acetyl tributyl citrate, and tricresyl phosphate.

4. The biodegradable material with added BBM bamboo powder according to claim 1, characterized in that: The mesh size of bamboo powder is 1000-2000 mesh.

5. The biodegradable material with added BBM bamboo powder according to claim 1, characterized in that: The bamboo powder is obtained by sequentially crushing, extracting, filtering, concentrating, refining and purifying, drying and crushing moso bamboo with an age of 3 to 3.5 years.

6. A method for preparing a biodegradable material with added BBM bamboo powder according to any one of claims 1 to 5, characterized in that: The steps include: S1. Treating the bamboo powder with low-temperature oxygen plasma for 5-15 seconds at a treatment power of 100-150 W, then adding the mixture and dopamine hydrochloride to a Tris-HCl buffer solution, ultrasonically treating the mixture for 1-2 hours, adjusting the pH value of the system to 7.5-8.5, stirring the mixture at 60-80° C. for 10-15 hours, centrifuging, washing, and vacuum drying the mixture to obtain pretreated bamboo powder; S2. Add n-butylamine and hexadecyltrimethylammonium bromide to water, stir at 80-90° C. for 10-20 min, add tetraethyl orthosilicate and continue stirring for 10-30 min, add tetrabutyl titanate and continue stirring for 1-2 h, centrifuge, wash, add methanol and concentrated hydrochloric acid, reflux in an oil bath for 1-2 h, centrifuge, wash with ethanol, vacuum dry, and calcine in a tube furnace, add 3-aminopropyltriethoxysilane and anhydrous ethanol, stir at 40-50° C. for 1-2 h, centrifuge, wash, and vacuum dry to obtain activated titanium dioxide; S3. Mix polybutylene adipate-terephthalate, polybutylene succinate, pretreated bamboo powder, activated titanium dioxide, antioxidant, and plasticizer, and extrude the mixture.

7. The method for preparing a biodegradable material by adding BBM bamboo powder according to claim 6, characterized in that: In S1, the concentration of Tris-HCl buffer is 0.01-0.05 mol / L.

8. The method for preparing a biodegradable material by adding BBM bamboo powder according to claim 6, characterized in that: In S1, the ultrasound frequency is 5-15kHz.

9. The method for preparing a biodegradable material by adding BBM bamboo powder according to claim 6, characterized in that: In S2, the calcination temperature is 550-600°C, and the calcination time is 2-4 hours.

10. Use of the biodegradable material added with BBM bamboo powder as claimed in any one of claims 1 to 5 as beer packaging material.

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