CN115028899A - Degradable environment-friendly antibacterial tableware and preparation process thereof - Google Patents
Degradable environment-friendly antibacterial tableware and preparation process thereof Download PDFInfo
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- CN115028899A CN115028899A CN202210402778.XA CN202210402778A CN115028899A CN 115028899 A CN115028899 A CN 115028899A CN 202210402778 A CN202210402778 A CN 202210402778A CN 115028899 A CN115028899 A CN 115028899A
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- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 26
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
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- 235000019698 starch Nutrition 0.000 claims abstract description 42
- 239000008107 starch Substances 0.000 claims abstract description 42
- 239000000835 fiber Substances 0.000 claims abstract description 38
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 25
- 238000004132 cross linking Methods 0.000 claims abstract description 23
- 239000004014 plasticizer Substances 0.000 claims abstract description 23
- 239000002131 composite material Substances 0.000 claims abstract description 22
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920000728 polyester Polymers 0.000 claims abstract description 20
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 19
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 18
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- 150000003839 salts Chemical class 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 6
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- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 claims description 3
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- 239000004342 Benzoyl peroxide Substances 0.000 claims description 3
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 claims description 3
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical group CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims description 3
- 244000025254 Cannabis sativa Species 0.000 claims description 3
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 3
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 claims description 3
- 229920002261 Corn starch Polymers 0.000 claims description 3
- 229920000742 Cotton Polymers 0.000 claims description 3
- 244000017020 Ipomoea batatas Species 0.000 claims description 3
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- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 claims description 3
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 claims description 3
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- 239000011425 bamboo Substances 0.000 claims description 3
- 235000019400 benzoyl peroxide Nutrition 0.000 claims description 3
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims description 3
- 235000009120 camo Nutrition 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 235000005607 chanvre indien Nutrition 0.000 claims description 3
- 239000008120 corn starch Substances 0.000 claims description 3
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 3
- 239000000194 fatty acid Substances 0.000 claims description 3
- 229930195729 fatty acid Natural products 0.000 claims description 3
- 239000011487 hemp Substances 0.000 claims description 3
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 claims description 3
- 229920002961 polybutylene succinate Polymers 0.000 claims description 3
- 239000004631 polybutylene succinate Substances 0.000 claims description 3
- 229920009537 polybutylene succinate adipate Polymers 0.000 claims description 3
- 239000004630 polybutylene succinate adipate Substances 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 239000010902 straw Substances 0.000 claims description 3
- 150000005846 sugar alcohols Polymers 0.000 claims description 3
- 229940100445 wheat starch Drugs 0.000 claims description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 claims description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 229920000881 Modified starch Polymers 0.000 abstract 1
- 239000004368 Modified starch Substances 0.000 abstract 1
- 235000019426 modified starch Nutrition 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 8
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
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Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47G—HOUSEHOLD OR TABLE EQUIPMENT
- A47G19/00—Table service
- A47G19/02—Plates, dishes or the like
- A47G19/03—Plates, dishes or the like for using only once, e.g. made of paper
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention belongs to the technical field of tableware preparation processes, and particularly relates to degradable environment-friendly antibacterial tableware and a preparation process thereof, wherein the degradable environment-friendly antibacterial tableware comprises the following components in parts by weight: 50-70 parts of plant starch, 40-60 parts of aliphatic diacid glycol polyester, 10-30 parts of polylactic resin, 5-10 parts of plant fiber, 3-5 parts of composite plasticizer, 0.2-1 part of cross-linking agent, 0.1-0.4 part of cross-linking catalyst, 0.5-2 parts of antioxidant and 5-10 parts of antibacterial agent, wherein starch is modified to have certain mechanical property, plasticity and processability so as to meet the requirement of preparing tableware; the quality of the biodegradable material for preparing the tableware is improved by plasticizing and crosslinking the modified starch, the aliphatic diacid diol polyester and the polylactic resin, the stability and the antibacterial property of the tableware can be improved by adding the antibacterial agent and the antioxidant, and the mechanical property of the tableware is further improved by adding the plant fiber in the raw materials.
Description
Technical Field
The invention relates to the technical field of tableware preparation processes, in particular to degradable environment-friendly antibacterial tableware and a preparation process thereof.
Background
With the rise of the take-out industry, the load of garbage disposal is aggravated by the use of a large amount of disposable articles such as take-out tableware while bringing great convenience to the life of people. Because plastics have light in weight, intensity height, good characteristics such as durability, the mainstream of present disposable tableware for packing still uses plastics material. Meanwhile, the characteristic of good durability of plastics also causes the current situation that waste plastics are difficult to degrade under natural conditions, which causes the pollution of what people commonly know as white garbage.
Starch is a natural resource existing in a large amount in green plants, is rich in resource, low in price and easy to degrade under natural conditions, is an important renewable and biodegradable natural resource, and has important application value in the fields of food industry and the like. However, these disadvantages prevent the widespread use of starch-based materials, since starch-based blend materials have a high water absorption and are not stable for long periods of time, and their mechanical properties and processability are poor. In the chemical field, materials such as aliphatic polyester, polylactic acid and the like also have outstanding advantages in the aspect of degradability, can completely realize the circulation of substances in nature through biodegradation, and cannot cause environmental burden, so that the degradable environment-friendly antibacterial tableware and the preparation process thereof are provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides degradable environment-friendly antibacterial tableware and a preparation process thereof so as to meet the market demand.
The technical scheme adopted by the invention for solving the technical problems is as follows: the degradable environment-friendly antibacterial tableware comprises the following components in parts by weight: 50-70 parts of plant starch, 40-60 parts of aliphatic diacid diol polyester, 10-30 parts of polylactic resin, 5-10 parts of plant fiber, 3-5 parts of composite plasticizer, 0.2-1 part of cross-linking agent, 0.1-0.4 part of cross-linking catalyst, 0.5-2 parts of antioxidant and 5-10 parts of antibacterial agent;
the aliphatic diacid diol polyester is poly butylene succinate and/or poly butylene succinate adipate, the composite plasticizer is a mixture of one or more of citrate plasticizers, polyalcohol derivative plasticizers and fatty acid ester plasticizers and sebacic acid polyester according to any proportion, and the antioxidant is 2, 6-di-tert-butyl-p-cresol or beta (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate.
As an optimized technical scheme, the cross-linking agent is one of dicumyl peroxide, benzoyl peroxide and dicumyl hydroperoxide.
As an optimized technical scheme, the crosslinking catalyst is organic acid metal salt or metal complex; the organic acid metal salt is formed by one of carboxylic acid with main chain structure of alkane, alkene and aromatic hydrocarbon and one of sodium, magnesium and iron ions; the metal complex is formed by one of stearic acid, oleic acid and citric acid and one of sodium, magnesium and iron ions.
As an optimized technical scheme, the plant starch is selected from one or more of corn starch, wheat starch, sweet potato starch, cassava starch and potato starch, and the plant starch is treated by adding a modifier to prepare the modified plant starch.
As an optimized technical scheme, the plant fiber is selected from one or more of straw fiber, cotton fiber, hemp fiber, bamboo fiber and wood pulp fiber, wherein the plant fiber is treated by a modifier and is modified plant fiber.
As an optimized technical scheme, the modifier is one or more of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent.
As an optimized technical scheme, the antibacterial agent is a composite antibacterial agent of carbon nano tube-carboxymethyl chitosan-silver or a monomolecular nano silver antibacterial agent, and the weight-average molecular weight of the polylactic resin is 10-30 multiplied by 104 g/mol.
In another technical scheme of the invention, the invention also provides a preparation process of the degradable environment-friendly antibacterial tableware, which comprises the following steps:
s1: accurately weighing the plant starch, adding the plant starch into a high-speed mixer, heating to 120-140 ℃, treating for 20-30 min, adding a modifier, and continuously treating for 20-30 min to prepare modified plant starch;
s2: accurately weighing the plant fiber, adding a modifier into the plant fiber to obtain a modified plant fiber material, and mixing the modified plant fiber material with modified plant starch to obtain a modified material;
s3: accurately weighing the aliphatic diacid glycol polyester, the polylactic acid resin and the composite plasticizer, adding the aliphatic diacid glycol polyester, the polylactic acid resin and the composite plasticizer into the prepared modified material, and stirring and reacting for 8-12 h under the conditions that the temperature is 160-180 ℃ and the vacuum degree is 0.05-0.1 MPa;
s4: accurately weighing the cross-linking agent, the cross-linking catalyst, the antioxidant and the antibacterial agent, reducing the temperature of a reactant in S3 to 130-150 ℃, adding the cross-linking agent and the cross-linking catalyst, continuously reacting for 6-8 h, then adding the antioxidant and the antibacterial agent, keeping the temperature and the pressure, and continuously reacting for 20-30 min;
s5: and (3) shearing, mixing, crosslinking, devolatilizing, extruding and granulating the product prepared by the S4 through a double-screw extruder to obtain the composite material.
The invention has the beneficial effects that:
compared with the prior art, the degradable aliphatic diacid diol polyester and the polylactic acid resin are added into the starch serving as the main raw materials, the mechanical property and the degradation rate of the tableware are balanced to a certain degree, the plant fiber is added into the degradable aliphatic diacid diol polyester and the polylactic acid resin, the mechanical property of the tableware is further improved, the starch and the plant fiber are added with the modifier for coupling modification, the mechanical property of the tableware is improved, the puncture resistance of the tableware is improved, and the antioxidant and the antibacterial agent are added in the preparation process, so that the stability and the antibacterial property of the tableware are improved.
Drawings
FIG. 1 is a flow chart of a preparation process of the degradable environment-friendly antibacterial tableware provided by the invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
It is to be understood that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the generic and descriptive sense only and not for purposes of limitation, as the term is used in the generic and descriptive sense, and not for purposes of limitation, unless otherwise specified or implied, and the specific reference to a device or element is intended to be a reference to a particular element, structure, or component.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
1. Performance testing
(1) And (3) testing mechanical properties: the test was carried out according to the method of GB/T1040.1-2006.
(2) And (3) testing the degradation performance: the method is characterized in that a soil burying method is adopted for testing, a weight (M1) sample of the degradable lunch box which is dried to constant weight is buried in a container filled with soil, after a period of degradation, the soil burying sample is taken out, the sample is cleaned and dried to constant weight (M2), and the degradation rate is calculated according to a calculation formula: the degradation rate is (M1-M2)/M1 multiplied by 100%.
(3) And (3) testing antibacterial performance: antibacterial performance tests were carried out with reference to GB/T31402-2015.
(4) And (3) puncture resistance testing: the test was carried out according to the standard GB/T37841-2019.
2. Detailed description of the preferred embodiments
Example 1: the degradable environment-friendly antibacterial tableware in the embodiment comprises the following components in parts by weight: 50-70 parts of plant starch, 40-60 parts of aliphatic diacid glycol polyester, 10-30 parts of polylactic resin, 5-10 parts of plant fiber, 3-5 parts of composite plasticizer, 0.2-1 part of cross-linking agent, 0.1-0.4 part of cross-linking catalyst, 0.5-2 parts of antioxidant and 5-10 parts of antibacterial agent;
the aliphatic diacid diol polyester is poly butylene succinate and/or poly butylene succinate adipate, the composite plasticizer is a mixture of one or more of citrate plasticizer, polyalcohol derivative plasticizer and fatty acid ester plasticizer and sebacic acid polyester according to any proportion, and the antioxidant is 2, 6-di-tert-butyl-p-cresol or beta (3, 5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate.
The crosslinking agent is one of dicumyl peroxide, benzoyl peroxide and dicumyl hydroperoxide, the crosslinking catalyst is organic acid metal salt or metal complex, the organic acid metal salt is organic acid metal salt formed by one of carboxylic acids with main chain structures of alkane, alkene and aromatic hydrocarbon and one of ions of sodium, magnesium and iron, and the metal complex is metal complex formed by one of stearic acid, oleic acid and citric acid and one of ions of sodium, magnesium and iron.
As an optimized technical scheme, the plant starch is selected from one or more of corn starch, wheat starch, sweet potato starch, cassava starch and potato starch, the plant starch is treated by adding a modifier to prepare modified plant starch, the plant fiber is selected from one or more of straw fiber, cotton fiber, hemp fiber, bamboo fiber and wood pulp fiber, the plant fiber is treated by the modifier and is the modified plant fiber, the modifier is one or more of a silane coupling agent, a titanate coupling agent and an aluminate coupling agent, the antibacterial agent is a composite antibacterial agent of carbon nano tube-carboxymethyl chitosan-silver or a monomolecular nano silver antibacterial agent, and the weight-average molecular weight of the polylactic resin is 10-30 x 104 g/mol.
In this embodiment, a preparation process of the degradable environment-friendly antibacterial tableware is further provided, which comprises the following steps:
s1: accurately weighing 50 kg of plant starch, adding the plant starch into a high-speed mixer, heating to 120 ℃, treating for 20min, then adding 5 kg of modifier, and continuing to treat for 20min to prepare modified plant starch;
s2: accurately weighing 5 kg of plant fiber, adding 0.5 kg of modifier into the plant fiber to obtain a modified plant fiber material, and mixing the modified plant fiber material with modified plant starch to obtain a modified material;
s3: accurately weighing 40 kg of aliphatic diacid glycol polyester, 10 kg of polylactic resin and 3 kg of composite plasticizer, adding the materials into the prepared modified material, and stirring and reacting for 8 hours at the temperature of 160 ℃ and the vacuum degree of 0.05 MPa;
s4: accurately weighing 0.2 kg of cross-linking agent, 0.1 kg of cross-linking catalyst, 0.5 kg of antioxidant and 5 kg of antibacterial agent, reducing the temperature of the reactant in S3 to 130 ℃, adding the cross-linking agent and the cross-linking catalyst into the reactant, continuously reacting for 6 hours, then adding the antioxidant and the antibacterial agent, keeping the temperature and the pressure, and continuously reacting for 20 minutes;
s5: and (3) shearing, mixing, crosslinking, devolatilizing, extruding and granulating the product prepared by the S4 through a double-screw extruder to obtain the composite material.
Example 2: a preparation process of degradable environment-friendly antibacterial tableware comprises the following steps:
s1: accurately weighing 60 kg of plant starch, adding the plant starch into a high-speed mixer, heating to 130 ℃, treating for 25min, then adding a modifier, and continuing to treat for 25min to prepare modified plant starch;
s2: accurately weighing 8 kg of plant fiber, adding a modifier into the plant fiber to obtain a modified plant fiber material, and mixing the modified plant fiber material with modified plant starch to obtain a modified material;
s3: accurately weighing 50 kg of aliphatic diacid glycol polyester, 20 kg of polylactic resin and 4 kg of composite plasticizer, adding the materials into the prepared modified material, and stirring and reacting for 10 hours at the temperature of 170 ℃ and the vacuum degree of 0.08 MPa;
s4: accurately weighing 0.6 kg of cross-linking agent, 0.25 kg of cross-linking catalyst, 1.25 kg of antioxidant and 7.5 kg of antibacterial agent, reducing the temperature of the reactant in S3 to 140 ℃, adding the cross-linking agent and the cross-linking catalyst, continuing to react for 7h, then adding the antioxidant and the antibacterial agent, keeping the temperature and the pressure, and continuing to react for 25 min;
s5: and (3) shearing, mixing, crosslinking, devolatilizing, extruding and granulating the product prepared by the S4 through a double-screw extruder to obtain the composite material.
Example 3: a preparation process of degradable environment-friendly antibacterial tableware comprises the following steps:
s1: accurately weighing 70 kg of plant starch, adding the plant starch into a high-speed mixer, heating to 140 ℃, treating for 30min, then adding a modifier, and continuing to treat for 30min to prepare modified plant starch;
s2: accurately weighing 10 kg of plant fiber, adding a modifier into the plant fiber to obtain a modified plant fiber material, and mixing the modified plant fiber material with modified plant starch to obtain a modified material;
s3: accurately weighing 60 kg of aliphatic diacid glycol polyester, 30 kg of polylactic resin and 5 kg of composite plasticizer, adding the materials into the prepared modified material, and stirring and reacting for 12 hours at the temperature of 180 ℃ and the vacuum degree of 0.1 MPa;
s4: accurately weighing 1 kg of cross-linking agent, 0.4 kg of cross-linking catalyst, 2 kg of antioxidant and 10 kg of antibacterial agent, reducing the temperature of the reactant in S3 to 150 ℃, adding the cross-linking agent and the cross-linking catalyst, continuing to react for 8h, then adding the antioxidant and the antibacterial agent, keeping the temperature and the pressure, and continuing to react for 30 min;
s5: and (3) shearing, mixing, crosslinking, devolatilizing, extruding and granulating the product prepared by the S4 through a double-screw extruder to obtain the composite material.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention should not be limited thereby, and various combinations, modifications and equivalents of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered by the scope of the claims of the present invention.
Claims (8)
1. The degradable environment-friendly antibacterial tableware is characterized in that: comprises the following components in parts by weight: 50-70 parts of plant starch, 40-60 parts of aliphatic diacid glycol polyester, 10-30 parts of polylactic resin, 5-10 parts of plant fiber, 3-5 parts of composite plasticizer, 0.2-1 part of cross-linking agent, 0.1-0.4 part of cross-linking catalyst, 0.5-2 parts of antioxidant and 5-10 parts of antibacterial agent;
the aliphatic diacid diol polyester is poly butylene succinate and/or poly butylene succinate adipate, the used composite plasticizer is a mixture of one or more of citrate plasticizer, polyalcohol derivative plasticizer and fatty acid ester plasticizer and sebacic acid polyester according to any proportion, and the antioxidant is 2, 6 di-tert-butyl-p-cresol or beta (3, 5 di-tert-butyl-4-hydroxyphenyl) octadecyl propionate.
2. The degradable environment-friendly antibacterial tableware according to claim 1, characterized in that: the cross-linking agent is one of dicumyl peroxide, benzoyl peroxide and dicumyl hydroperoxide.
3. The degradable environment-friendly antibacterial tableware according to claim 1, characterized in that: the crosslinking catalyst is organic acid metal salt or metal complex; the organic acid metal salt is formed by one of carboxylic acid with main chain structure of alkane, alkene and aromatic hydrocarbon and one of sodium, magnesium and iron ions; the metal complex is formed by one of stearic acid, oleic acid and citric acid and one of sodium, magnesium and iron ions.
4. The degradable environment-friendly antibacterial tableware according to claim 1, characterized in that: the plant starch is selected from one or more of corn starch, wheat starch, sweet potato starch, cassava starch and potato starch, and the plant starch is treated by adding a modifier to prepare the modified plant starch.
5. The degradable environment-friendly antibacterial tableware according to claim 1, characterized in that: the plant fiber is selected from one or more of straw fiber, cotton fiber, hemp fiber, bamboo fiber and wood pulp fiber, wherein the plant fiber is treated by a modifier and is modified plant fiber.
6. The degradable environment-friendly antibacterial tableware according to claim 4 or 5, wherein: the modifier is one or more of silane coupling agent, titanate coupling agent and aluminate coupling agent.
7. The degradable environment-friendly antibacterial tableware according to claim 1, characterized in that: the antibacterial agent is a composite antibacterial agent of carbon nano tube-carboxymethyl chitosan-silver or a monomolecular nano silver antibacterial agent, and the weight average molecular weight of the polylactic resin is 10-30 multiplied by 104 g/mol.
8. The preparation process of the degradable environment-friendly antibacterial tableware according to claim 1, which is characterized in that: the method comprises the following steps:
s1: accurately weighing the plant starch, adding the plant starch into a high-speed mixer, heating to 120-140 ℃, treating for 20-30 min, adding a modifier, and continuously treating for 20-30 min to prepare modified plant starch;
s2: accurately weighing the plant fiber, adding a modifier into the plant fiber to obtain a modified plant fiber material, and mixing the modified plant fiber material with modified plant starch to obtain a modified material;
s3: accurately weighing the aliphatic diacid glycol polyester, the polylactic acid resin and the composite plasticizer, adding the aliphatic diacid glycol polyester, the polylactic acid resin and the composite plasticizer into the prepared modified material, and stirring and reacting for 8-12 h under the conditions that the temperature is 160-180 ℃ and the vacuum degree is 0.05-0.1 MPa;
s4: accurately weighing the cross-linking agent, the cross-linking catalyst, the antioxidant and the antibacterial agent, reducing the temperature of a reactant in S3 to 130-150 ℃, adding the cross-linking agent and the cross-linking catalyst, continuously reacting for 6-8 h, then adding the antioxidant and the antibacterial agent, keeping the temperature and the pressure, and continuously reacting for 20-30 min;
s5: and (3) shearing, mixing, crosslinking, devolatilizing, extruding and granulating the product prepared by the step S4 through a double-screw extruder to obtain the composite material.
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| CN115594888A (en) * | 2022-10-25 | 2023-01-13 | 扬州工业职业技术学院（Cn） | Biodegradable compound toiletries and preparation method thereof |
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| CN102108194A (en) * | 2009-12-28 | 2011-06-29 | 东丽纤维研究所（中国）有限公司 | Polylactic acid/fatty dibasic acid and diol polyester composite |
| CN112409647A (en) * | 2020-10-16 | 2021-02-26 | 安徽省怀宁县希望纸塑有限责任公司 | Biodegradable material for preparing tableware and preparation method thereof |
| CN112876745A (en) * | 2021-02-04 | 2021-06-01 | 杭州之西科技有限公司 | Antibacterial biodegradable tableware and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102108194A (en) * | 2009-12-28 | 2011-06-29 | 东丽纤维研究所（中国）有限公司 | Polylactic acid/fatty dibasic acid and diol polyester composite |
| CN112409647A (en) * | 2020-10-16 | 2021-02-26 | 安徽省怀宁县希望纸塑有限责任公司 | Biodegradable material for preparing tableware and preparation method thereof |
| CN112876745A (en) * | 2021-02-04 | 2021-06-01 | 杭州之西科技有限公司 | Antibacterial biodegradable tableware and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115594888A (en) * | 2022-10-25 | 2023-01-13 | 扬州工业职业技术学院（Cn） | Biodegradable compound toiletries and preparation method thereof |
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