CN111560159A - Bamboo powder poly (butylene succinate) starch biodegradable plastic and preparation method thereof - Google Patents
Bamboo powder poly (butylene succinate) starch biodegradable plastic and preparation method thereof Download PDFInfo
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- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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Abstract
The invention provides bamboo powder/poly (butylene succinate)/starch biodegradable plastic and a preparation method thereof. The bamboo powder/poly (butylene succinate)/starch biodegradable plastic provided by the invention comprises the following components: 15-25 parts of bamboo powder, 30-45 parts of polybutylene succinate, 15-25 parts of starch, 12-20 parts of talcum powder and the like. The bamboo powder/poly (butylene succinate)/starch biodegradable plastic prepared by the invention has wide and safe raw material sources, is not added with any chemical additive with toxic or side effect, can be used for producing disposable tableware products such as knife, fork and spoon, cup cover, straw, bowl, lunch box and the like, can be completely degraded after being used, and has short degradation period.
Description
Technical Field
The invention relates to the technical field of new biodegradable materials, in particular to bamboo powder poly (butylene succinate-co-starch) biodegradable plastic and a preparation method thereof.
Background
Polylactic acid (PLA) is a degradable and renewable polymer, and has excellent biocompatibility, high strength and high modulus mechanical properties. However, polylactic acid has high cost and no advantage compared with common petroleum-based plastics, so that the wide popularization of the polylactic acid is limited. Even if other biomass raw materials such as bamboo powder and wood powder are added into the polylactic acid biodegradable plastic which is widely adopted at present to be compounded with polylactic acid so as to reduce the cost of the raw materials, the content of the polylactic acid is still high, and the effect of controlling the cost of the raw materials is not very obvious, so that the development of the biodegradable composite material which is energy-saving, environment-friendly, high in performance and low in cost has great application value.
Polybutylene succinate (PBS) has attracted much attention as an environmentally friendly polymer material since commercialization in the 90 s of the 20 th century. PBS (PBS) -based polyester is used as biodegradable plastic, has the physical and chemical properties, the processability and the good mechanical property which are comparable to those of the traditional petroleum-based plastic, the mechanical property of the PBS-based polyester is close to that of Polypropylene (PE) and acrylonitrile-butadiene-styrene (ABS) plastic, the heat resistance is good, and the PBS-based polyester has good development prospect in the fields of food packaging, agricultural films, sanitary products and the like. PBS can be degraded only under the condition that compost, water body and the like contact with specific microorganisms, has very stable performance in the normal storage and use process, has good cost performance, and has great market value for developing high-performance biodegradable composite materials. However, the relative molecular mass of PBS is low, the number of long-chain branches in a molecular chain is small, active reaction points are lacked, the degradation rate is slow, and the like, so that the industrial application of PBS is limited.
Disclosure of Invention
The invention mainly aims to provide bamboo powder and poly (butylene succinate) starch biodegradable plastic and a preparation method thereof, and aims to solve the problem of high production cost of the traditional biodegradable material.
In order to achieve the purpose, the invention provides bamboo powder poly (butylene succinate) starch biodegradable plastic which comprises the following components in parts by weight:
preferably, the composition comprises the following components:
preferably, the starch comprises: one or more of wheat starch, sweet potato starch, corn starch and potato starch.
Preferably, the particle size of the bamboo powder is 3000-4000 meshes, the talcum powder is superfine talcum powder, the particle size of the superfine talcum powder is 5000-7000 meshes, and the titanium dioxide is nano-scale titanium dioxide.
Starch is used as a carrier of the biological enzyme, the biological enzyme is coated in the mixing process to form biological enzyme microspheres with hydrophilic surfaces, and inorganic nano titanium dioxide is combined with the biological enzyme to enter the microspheres. After the biodegradable plastic is discarded, in the environment of compost and the like, the transition energy generated after the titanium dioxide absorbs the light energy can excite the macromolecular chain of the succinic acid butanediol ester to generate chain scission reaction, can promote the enzymatic reaction of biological enzyme under the conditions of light, heat and humidity, and further accelerates the degradation reaction of the high molecular polymer.
Preferably, the biological enzymes comprise: one or more of lipase, lyase, glucose isomerase, alcohol dehydrogenase and ligase.
Biological enzymes exhibit high catalytic action under specific environments,
preferably, the natural oil is natural vegetable oil, and comprises: one or more of peanut oil, hemp oil, corn oil, palm oil, soybean oil and linseed oil.
The natural vegetable oil has good viscosity to various powdery particles in the raw materials, and can prevent the powdery substances from being suspended and escaping under stirring in the mixing process. On the other hand, the addition of the inorganic fillers of talcum powder and titanium dioxide reduces the compatibility and the fluidity of the raw materials to a certain degree, and the vegetable oil can enhance the compatibility among the materials, improve the fluidity of the mixed materials and facilitate the processing and the molding.
The talcum powder has good adsorption capacity, can enhance the heat resistance, rheological property and mechanical property of the PBS by adding the talcum powder as a filler into a system, and the thinner the talcum powder is, the more active oxygen exposed outside in unit volume and OH-in the same horizontal layer with the active oxygen are, so that the electrostatic binding force between the talcum powder and a bamboo powder cellulose molecular chain is improved, and a proper reaction condition is provided for the polymerization of the bamboo powder and PBS molecules.
In order to realize the purpose, the invention also provides a preparation method of the bamboo powder poly (butylene succinate-co-starch) biodegradable plastic, which comprises the following steps:
(1) putting starch, biological enzyme and titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
(2) putting the bamboo powder into a high-speed grinder to grind the bamboo powder to a specified particle size, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and the natural oil for mixing;
(3) adding polybutylene succinate, talcum powder and chitin into the kneading mixer in the step (2) for continuous mixing, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
(4) putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
(5) transferring the degraded material to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable degraded material particles to be cylindrical, wherein the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
(6) and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Preferably, the mixing temperature in the step (3) is 110-150 ℃, and the mixing time is 2-4 h.
According to the technical scheme, the composite biodegradable material is synthesized by blending the bio-based raw materials such as bamboo powder, the polybutylene succinate and the starch, the polybutylene succinate with higher cost performance is used as a matrix material in the raw materials, the bamboo powder is higher in addition proportion, the prepared bio-based plastic has good physical and chemical properties, the production cost is greatly reduced, and the market application value is huge. Biological enzyme is added into the raw materials, so that the coupling effect is achieved in the raw material compounding process, the grafting reaction of a macromolecular chain segment group is promoted, and the compound grafting rate is improved; in the waste treatment stage after the plastic is used, the degradation reaction of the high molecular polymer is triggered from the inside, and the degradation period is shortened. The bamboo powder poly (butylene succinate) starch biodegradable plastic prepared by the invention has wide and safe raw material sources, is not added with any chemical additive with toxic or side effect, and can be used for producing disposable tableware products such as knife, fork, spoon, cup cover, straw, bowl, lunch box and the like.
Detailed Description
The technical solutions in the embodiments of the present invention are described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.4 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 15 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Example 2
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.4 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Example 3
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.4 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 25 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
The bamboo powder poly (butylene succinate) starch biodegradable plastic prepared in examples 1 to 3 was tested according to the relevant standards of GBT1033.1-2008, GBT 6284-2006 and GBT 1043.1-2008, and the test results are shown in Table 1.
TABLE 1 test results for biodegradable plastics of examples 1 to 3
As can be seen from table 1, when the addition amount of the bamboo powder is further increased, the following effects are achieved: when the ratio of PBS to PBS is 25:37.5, the prepared bamboo powder polybutylene succinate starch biodegradable plastic has no difference in appearance, smell and the like, but the impact strength and the melt flow rate of the plastic are obviously changed, so that the addition amount of the bamboo powder is not suitable to be too large, and the mechanical property of the composite material is influenced by too high proportion of the bamboo powder in the mixed material.
Example 4
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.2 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Example 5
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.6 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Comparative example 1
The common bamboo powder poly (butylene succinate) starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.4 part of coupling agent and 4.5 parts of titanium dioxide into a high-speed grinding machine, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Comparative example 2
The common bamboo powder poly (butylene succinate) starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch and 4.5 parts of titanium dioxide into a high-speed grinding machine, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
Comparative example 3
The bamboo powder poly succinic acid butanediol ester starch biodegradable plastic is prepared by the following method:
step 1: putting 20 parts of starch, 0.8 part of biological enzyme and 4.5 parts of titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
step 2: putting 20 parts of bamboo powder into a high-speed grinder to grind to 3000-4000 meshes, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and 0.3 part of natural oil to mix;
and step 3: adding 37.5 parts of succinic acid butanediol ester, 17 parts of 6000-mesh talcum powder and 0.3 part of chitin into the kneading mixer in the step 2 for continuous mixing, controlling the mixing temperature at 130 ℃, controlling the mixing time at 2-4 h, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
and 4, step 4: putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
and 5: transferring the degraded material obtained in the step 4 to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable the degraded material particles to be cylindrical, the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
step 6: and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
The bamboo powder poly (butylene succinate) starch biodegradable plastic prepared in examples 1 to 3 was tested according to the relevant standards of GBT1033.1-2008, GBT 6284-2006 and GBT 1043.1-2008, and the test results are shown in Table 2.
TABLE 2 biodegradable plastics test results
As can be seen from table 2, in comparative example 1, the bio-enzyme is not added, and the coupling agent is used instead of the bio-enzyme, so that the appearance, smell and the like of the biodegradable plastic prepared from bamboo powder poly (butylene succinate) starch prepared by adding the bio-enzyme are not different from those of other examples, but the impact strength, the melt flow rate and the melting point are all significantly reduced. Compared with the bamboo powder poly (butylene succinate) starch biodegradable plastic prepared without adding biological enzyme, the comparative example 1 has no obvious difference in impact strength, melt flow rate and melting point. The technical scheme of the invention shows that the coupling agent added for promoting the compounding of the high molecular material traditionally does not play a good role, and the biodegradable plastic with good mechanical property can be prepared under the condition of not using the coupling agent. According to comparative example 3, when the dosage of the biological enzyme reaches a certain proportion, the dosage of the biological enzyme is increased, and the impact strength, the melt flow rate and the melting point of the prepared biodegradable plastic are not obviously changed.
The biodegradable plastic particles prepared in the above embodiment are buried under the conditions of the same humidity, temperature and depth for composting, the natural degradation environment of plastics is simulated, and the degradation rate is periodically detected. The test results are shown in Table 3.
TABLE 3 degradation rate test results for biodegradable plastics
As can be seen from Table 3, compared with the biodegradable plastic prepared by adding the biological enzyme, the biodegradable plastic prepared without adding the biological enzyme has a significantly reduced degradation rate in the same detection period. The biodegradable plastic prepared by adding the biological enzyme basically finishes degradation after 12 months. Enzymatic degradation reaction of product enzyme occurs in the refuge environment, molecular chains of PBS and bamboo powder cellulose are broken under the action of biological enzyme and are continuously decomposed into small molecular chain segments, and finally the molecular chains are completely degraded into monomer structures such as succinic acid butanediol ester and glucose, so that the influence on the environment is avoided.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly or indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (8)
1. The bamboo powder/poly (butylene succinate)/starch biodegradable plastic is characterized by comprising the following components in parts by mass:
2. the bamboo powder/polybutylene succinate/starch biodegradable plastic as claimed in claim 1, which comprises the following components:
3. bamboo powder/polybutylene succinate/starch biodegradable plastic according to any one of claims 1 or 2, wherein the starch comprises: one or more of wheat starch, sweet potato starch, corn starch and potato starch.
4. The bamboo powder/polybutylene succinate/starch biodegradable plastic as claimed in any one of claims 1 or 2, wherein the particle size of the bamboo powder is 3000-4000 meshes, the talcum powder is ultrafine talcum powder, the particle size of the ultrafine talcum powder is 5000-7000 meshes, and the titanium dioxide is nano-titanium dioxide.
5. The bamboo powder/polybutylene succinate/starch biodegradable plastic as claimed in any one of claims 1 or 2, wherein the biological enzyme comprises: one or more of lipase, lyase, glucose isomerase, alcohol dehydrogenase and ligase.
6. The bamboo powder/polybutylene succinate/starch biodegradable plastic as claimed in any one of claims 1 or 2, wherein the natural oil is natural vegetable oil and comprises: one or more of peanut oil, hemp oil, corn oil, palm oil, soybean oil and linseed oil.
7. A method for preparing bamboo powder/poly (butylene succinate)/starch biodegradable plastic, which comprises the components of any one of claims 1 to 6, and is characterized by comprising the following steps:
(1) putting starch, biological enzyme and titanium dioxide into a high-speed grinder, and uniformly mixing to obtain a mixed material A;
(2) putting the bamboo powder into a high-speed grinder to grind the bamboo powder to a specified particle size, directly transferring the ground bamboo powder to a kneading mixer, and sequentially adding the mixed material A and the natural oil for mixing;
(3) adding polybutylene succinate, talcum powder and chitin into the kneading mixer in the step (2) for continuous mixing, and further refining and dispersing the raw materials in a mixing chamber through rotor friction and shearing to obtain a mixed material B;
(4) putting the mixed material B into a biological reaction furnace through a forced feeding system for biological reaction to obtain a degraded material, controlling the temperature of the biological reaction furnace to be 50-75 ℃, and preserving the heat for 15-26 h;
(5) transferring the degraded material to a double-screw extruder for granulation, controlling the extrusion melting temperature to be 150-160 ℃, and then carrying out granulation by using an air-cooled granulation system to enable degraded material particles to be cylindrical, wherein the diameter of the degraded material particles is 3-4 mm, and the length of the degraded material particles is 2-4 mm;
(6) and (5) transferring the product obtained in the step (5) to a pulse pneumatic conveying raw material purifier for material purification, and drying to obtain the biodegradable plastic.
8. The method for preparing bamboo powder/polybutylene succinate/starch biodegradable plastic as claimed in claim 7, wherein the mixing temperature in the step (3) is 110-150 ℃, and the mixing time is 2-4 h.
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| CN202010523092.7A CN111560159A (en) | 2020-06-10 | 2020-06-10 | Bamboo powder poly (butylene succinate) starch biodegradable plastic and preparation method thereof |
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| CN113603940A (en) * | 2021-08-11 | 2021-11-05 | 福建省铨丰环保科技有限公司 | Fusion agent for improving physical properties of fully biodegradable plastic and preparation method and application thereof |
| CN113968995A (en) * | 2021-12-15 | 2022-01-25 | 广东格瑞新材料股份有限公司 | Fully-degradable composite material for coffee cup and preparation method thereof |
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Cited By (2)
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| CN113968995A (en) * | 2021-12-15 | 2022-01-25 | 广东格瑞新材料股份有限公司 | Fully-degradable composite material for coffee cup and preparation method thereof |
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