CN106565998A - Cassava starch degradable film and preparation method thereof - Google Patents
Cassava starch degradable film and preparation method thereof Download PDFInfo
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- CN106565998A CN106565998A CN201610920979.3A CN201610920979A CN106565998A CN 106565998 A CN106565998 A CN 106565998A CN 201610920979 A CN201610920979 A CN 201610920979A CN 106565998 A CN106565998 A CN 106565998A
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2303/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2303/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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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
- C08L2201/00—Properties
- C08L2201/06—Biodegradable
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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
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
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Abstract
The invention discloses a cassava starch degradable film. The cassava starch degradable film comprises the following raw materials in parts by weight: 80 to 100 parts of cassava starch, 0 to 20 parts of polyvinyl alcohol and 0 to 10 parts of nano silica, wherein the parts by weight of polyvinyl alcohol and nano silica cannot be 0 at the same time. The invention further discloses a preparation method of the cassava starch degradable film. The preparation method comprises the steps of refining the raw materials in parts by weight; mixing the refined raw materials, so as to obtain a preliminarily mixed object; then, carrying out melt blending on the preliminarily mixed object; and finally, pressing the preliminarily mixed object subjected to melt blending into the film through a press vulcanizer, so as to obtain the cassava starch degradable film. The cassava starch degradable film has excellent mechanical properties and can be quickly degraded in short time, so that original good soil properties of soil are sufficiently maintained, air permeability of soil is effectively improved, and regrowth of crops is guaranteed; and a theoretical basis is provided for development and application of rich cassava starch resources in Guangxi, and the cassava starch degradable film has important significance for developing local economy and promoting development of the degradable material industry.
Description
Technical field
The present invention relates to degradation material and its preparing technical field, espespecially a kind of tapioca degradable films and its system
Preparation Method.
Background technology
Starch is a kind of natural organic high-molecular material, is constituent common in higher plant.In wide material sources, valency
Under the preconditions such as lattice are cheap, nonhazardouss, its biodegradability receives much concern.Therefore, prepare by primary raw material of starch
Going out Biodegradable material becomes a research and development focus.Wherein, Starch-base Degradable Plastic can efficiently solve plastic refuse pair
The pollution of environment, is one of direction of Plastics Development from now on.At present for the research emphasis of Starch-base Degradable Plastic are to try to carry
High tapioca starch present, and keep excellent mechanical property so as to prepare can be degradable plastics.
Existing Starch-base Degradable Plastic can be generally divided into three classes：The direct filled-type of starch, starch-macromolecular material are common
Mixed type, full starch type.Maximum problem is substantially not formed between starch and synthetic material molecule in direct filled-type
Learn the effect of key, i.e. poor compatibility.Content of starch in blending type is relatively low, causes material degradable.Full starch
Plastic is scientific research person's purpose to be reached, and the full-starch plastic of commercialization has been realized at present, but also fails to meet in agricultural
Application.
In agriculture field, for plastic material demand greatly, especially thin-film material, such as mulch film, and used
Thin-film material almost all is material that can not be degradable, and the material for failing to degrade is remained in soil, hinders Crop Root
The development of system and to moisture, the absorption of nutrient, reduces the gas permeability of soil, causes crop production reduction.And can be degradable it is thin
Membrane material has that processing difficulties, mechanical property and water resistance are poor, it is difficult to promotion and application.
Therefore, research and develop and prepare can be applicable to the low cost of agriculture field, dominance can starch degradable thin film particularly must
Will.And Guangxi has abundant tapioca resource, tapioca thin film is prepared by object of study of tapioca resource, and will
It is applied to agriculture field, to developing local economy, drives the development of degradation material industry significant.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide tapioca degradable films, it is the property that can be applied to agriculture field
The excellent, water-tolerant of energy, tapioca degradable films that can be degradable.
A kind of tapioca degradable films that the present invention is provided, including the raw material of following weight portion：Tapioca 80～
100 parts, 0～20 part of polyvinyl alcohol, 0～10 part of nano silicon is when wherein polyvinyl alcohol is different from nano silicon
0。
Preferably, the nano silicon is hydrophilic nano-silicon dioxide.
Preferably, the tapioca degradable films, including the raw material of following weight portion：Tapioca 80～100
Part, 11～20 parts of polyvinyl alcohol.
Preferably, described tapioca degradable films, including the raw material of following weight portion：Tapioca 80～
100 parts, 4～9 parts of nano silicon.
Preferably, described tapioca degradable films, including the raw material of following weight portion：Tapioca 80～
100 parts, 4～9 parts of nano silicon, 11～20 parts of polyvinyl alcohol.
Preferably, described tapioca degradable films, further include the raw material of following weight portion：Powder of Radix Puerariae 5
～10 parts, 6～15 parts of Fructus Musae powder, 8～17 parts of Biopolvester PHA, 10～20 parts of polylactic acid, 6～9 parts of poly phosphate gathers in oneself
5～12 parts of ester, 15～30 parts of glycerol, 2～4 parts of coupling agent, 2～3 parts of antioxidant, wherein 1～2 part of ultraviolet (UV) resistant agent, coupling agent
It is the one kind in Aluminate, titanate esters or borate.
Present invention also offers a kind of preparation method of tapioca degradable films：The raw material of above-mentioned parts by weight is thin
Change, be mixed to get just mixed thing, then melt blending, is finally pressed into thin film with vulcanizing press, obtains tapioca degradable thin
Film.
Preferably, by the powder of Radix Puerariae and 6～15 weight portions of the tapioca of above-mentioned parts by weight and 5～10 weight portions
Fructus Musae powder is refined to respectively 250 mesh and mixes, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period is continually fed into nitrogen；Subsequently
The nano silicon and polyvinyl alcohol of above-mentioned parts by weight is added under vacuum and is sufficiently mixed by homogenizer
Obtain just mixed thing；Then in proportion plus the weight portions of Biopolvester PHA 8～17, the weight portion of polylactic acid 10～20, poly phosphate 6～
9 weight portions, the weight portion of polycaprolactone 5～12, the weight portion of glycerol 15～30, the weight portion of coupling agent 2～4, the weight of antioxidant 2～3
Part, the weight portion of ultraviolet (UV) resistant agent 1～2, continue stirring and are warming up to 120～130 DEG C, send into further melt blending in banbury
1h, banbury temperature control is 110 DEG C, and rotating speed is 60r/min.
Preferably, the temperature of the vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.
Present invention effect to be reached is promoted：
1. the tapioca degradable films of the present invention have high tapioca starch present, while with the addition of powder of Radix Puerariae, perfume (or spice)
The Biodegradable materials such as any of several broadleaf plants powder, Biopolvester, polylactic acid, and under vacuum add hydrophilic nano-silicon dioxide and
Polyvinyl alcohol, the tensile strength of the thin film prepared is up to 31%, with excellent mechanical property, additionally, gained thin film is in short-term
It is interior capable of being fast degraded, the original benign soil property of soil is kept, the breathability of soil is effectively improved, ensure the regeneration of crops
It is long.
2. the present invention prepares tapioca thin film with the tapioca resource that Guangxi is enriched as object of study, is that Guangxi is enriched
Tapioca development of resources and application provide fundamental basis, to develop local economy, drive degradative plastics industry development tool
It is significant.
The further advantage of the present invention, target and feature embody part by description below, and part will also be by this
The research of invention and practice and be understood by the person skilled in the art.
Specific embodiment
With reference to embodiment, the present invention is described in further detail, to make those skilled in the art with reference to description
Word can be implemented according to this.
It should be appreciated that it is used herein such as " have ", "comprising" and " including " term do not allot one or many
The presence or addition of individual other elements or its combination.
<Embodiment 1>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, polyvinyl alcohol
11 parts.Preparation method is as follows：
By above-mentioned tapioca, 80 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；11 parts of polyvinyl alcohol is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed thing；After
Continuous stirring is warming up to 120～130 DEG C, sends into further melt blending 1h in banbury, and banbury temperature control is 110 DEG C, is turned
Speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/poly-
Alcohol film.
<Embodiment 2>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, polyvinyl alcohol
15 parts.
Preparation method is as follows：
By above-mentioned tapioca, 90 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；15 parts of polyvinyl alcohol is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed thing；After
Continuous stirring is warming up to 120～130 DEG C, sends into further melt blending 1h in banbury, and banbury temperature control is 110 DEG C, is turned
Speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/poly-
Alcohol film.
<Embodiment 3>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, polyvinyl alcohol
20 parts.
Preparation method is as follows：
By above-mentioned tapioca, 100 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；20 parts of polyvinyl alcohol is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed thing；After
Continuous stirring is warming up to 120～130 DEG C, sends into further melt blending 1h in banbury, and banbury temperature control is 110 DEG C, is turned
Speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/poly-
Alcohol film.
<Embodiment 4>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, nano-silica
4 parts of SiClx.
Preparation method is as follows：
By above-mentioned tapioca, 80 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；4 parts of nano silicon is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed
Thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110
DEG C, rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give para arrowroot
Powder/nanometer titanium dioxide silicon thin film.
<Embodiment 5>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, hydrophilic is received
6 parts of silicon dioxide of rice.
Preparation method is as follows：
By above-mentioned tapioca, 90 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；6 parts of nano silicon is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed
Thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110
DEG C, rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give para arrowroot
Powder/nanometer titanium dioxide silicon thin film.
<Embodiment 6>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, nano-silica
9 parts of SiClx.
Preparation method is as follows：
By above-mentioned tapioca, 100 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；9 parts of nano silicon is subsequently added under vacuum, and is sufficiently mixed by homogenizer and is obtained just mixed
Thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110
DEG C, rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give para arrowroot
Powder/nanometer titanium dioxide silicon thin film.
<Embodiment 7>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, polyvinyl alcohol
11 parts, 4 parts of nano silicon.
Preparation method is as follows：
By above-mentioned tapioca, 80 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；4 parts of 11 parts of polyvinyl alcohol and nano silicon are subsequently added under vacuum, and it is abundant by homogenizer
It is mixed to get just mixed thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h, banbury temperature in banbury
Degree is controlled to 110 DEG C, and rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Most
Tapioca/polyvinyl alcohol/nanometer titanium dioxide silicon thin film is obtained eventually.
<Embodiment 8>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, polyvinyl alcohol
15 parts, 6 parts of hydrophilic nano-silicon dioxide.
Preparation method is as follows：
By above-mentioned tapioca, 90 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；6 parts of 15 parts of polyvinyl alcohol and nano silicon are subsequently added under vacuum.And it is abundant by homogenizer
It is mixed to get just mixed thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h, banbury temperature in banbury
Degree is controlled to 110 DEG C, and rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Most
Tapioca/polyvinyl alcohol/nanometer titanium dioxide silicon thin film is obtained eventually.
<Embodiment 9>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, polyvinyl alcohol
20 parts, 9 parts of nano silicon.
Preparation method is as follows：
By above-mentioned tapioca, 100 parts are refined to 250 mesh, and the refrigerating chamber for being subsequently placed in -30 DEG C places 1h, and period persistently leads to
Enter nitrogen；9 parts of 20 parts of polyvinyl alcohol and nano silicon are subsequently added under vacuum, and it is abundant by homogenizer
It is mixed to get just mixed thing；Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h, banbury temperature in banbury
Degree is controlled to 110 DEG C, and rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Most
Tapioca/polyvinyl alcohol/nanometer titanium dioxide silicon thin film is obtained eventually.
<Embodiment 10>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, polyvinyl alcohol
11 parts, 5 parts of powder of Radix Puerariae, 6 parts of Fructus Musae powder, 8 parts of Biopolvester PHA, 10 parts of polylactic acid, 6 parts of poly phosphate, 5 parts of polycaprolactone,
15 parts of glycerol, 2 parts of Aluminate, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 80 parts of above-mentioned tapioca, 6 parts of 5 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；11 parts of polyvinyl alcohol is subsequently added under vacuum, and is led to
Cross homogenizer and be sufficiently mixed and obtain just mixed thing；Then Biopolvester PHA8 parts, 10 parts of polylactic acid, poly phosphate are added in proportion
6 parts, 5 parts of polycaprolactone, 15 parts of glycerol, 2 parts of Aluminate, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent continues stirring and is warming up to 120
～130 DEG C, further melt blending 1h in banbury is sent into, banbury temperature control is 110 DEG C, and rotating speed is 60r/min.Flat board
The temperature of vulcanizer is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/polyvinyl alcohol film.
<Embodiment 11>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, polyvinyl alcohol
15 parts, 7 parts of powder of Radix Puerariae, 11 parts of Fructus Musae powder, 13 parts of Biopolvester PHA, 15 parts of polylactic acid, 8 parts of poly phosphate, polycaprolactone 9
Part, 22 parts of glycerol, 3 parts of titanate esters, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 90 parts of above-mentioned tapioca, 11 parts of 7 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；15 parts of polyvinyl alcohol is subsequently added under vacuum, and is led to
Cross homogenizer and be sufficiently mixed and obtain just mixed thing；Then Biopolvester PHA13 parts, 15 parts of polylactic acid, polyphosphoric acid are added in proportion
8 parts of ester, 9 parts of polycaprolactone, 22 parts of glycerol, 3 parts of titanate esters, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent continues stirring and is warming up to
120～130 DEG C, further melt blending 1h in banbury is sent into, banbury temperature control is 110 DEG C, and rotating speed is 60r/min.
The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/polyvinyl alcohol film.
<Embodiment 12>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, polyvinyl alcohol
20 parts, 10 parts of powder of Radix Puerariae, 15 parts of Fructus Musae powder, 17 parts of Biopolvester PHA, 20 parts of polylactic acid, 9 parts of poly phosphate, polycaprolactone 12
Part, 30 parts of glycerol, 4 parts of borate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 100 parts of above-mentioned tapioca, 15 parts of 10 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, then
The refrigerating chamber for being placed in -30 DEG C places 1h, and period is continually fed into nitrogen；20 parts of polyvinyl alcohol is subsequently added under vacuum, and
It is sufficiently mixed by homogenizer and obtains just mixed thing；Then Biopolvester PHA17 parts, 20 parts of polylactic acid, poly- phosphorus are added in proportion
9 parts of acid esters, 12 parts of polycaprolactone, 30 parts of glycerol, 4 parts of borate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent continues to stir and heats up
To 120～130 DEG C, further melt blending 1h in banbury is sent into, banbury temperature control is 110 DEG C, and rotating speed is 60r/
min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/polyvinyl alcohol thin
Film.
<Embodiment 13>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, nano-silica
4 parts of SiClx, 5 parts of powder of Radix Puerariae, 6 parts of Fructus Musae powder, 8 parts of Biopolvester PHA, 10 parts of polylactic acid, 6 parts of poly phosphate, polycaprolactone 5
Part, 15 parts of glycerol, 2 parts of titanate esters, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 80 parts of above-mentioned tapioca, 6 parts of 5 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；4 parts of nano silicon is subsequently added under vacuum, and
It is sufficiently mixed by homogenizer and obtains just mixed thing；Then Biopolvester PHA8 parts, 10 parts of polylactic acid, polyphosphoric acid are added in proportion
6 parts of ester, 5 parts of polycaprolactone, 15 parts of glycerol, 2 parts of titanate esters, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent continues stirring and is warming up to
120～130 DEG C, further melt blending 1h in banbury is sent into, banbury temperature control is 110 DEG C, and rotating speed is 60r/min.
The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/nano silicon thin
Film.
<Embodiment 14>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, hydrophilic is received
6 parts of silicon dioxide of rice, 7 parts of powder of Radix Puerariae, 11 parts of Fructus Musae powder, 13 parts of Biopolvester PHA, 15 parts of polylactic acid, 8 parts of poly phosphate gathers
9 parts of caprolactone, 22 parts of glycerol, 3 parts of Aluminate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 90 parts of above-mentioned tapioca, 11 parts of 7 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；Subsequently hydrophilic nano-silicon dioxide is added under vacuum
6 parts, and be sufficiently mixed by homogenizer and obtain just mixed thing；Then Biopolvester PHA13 parts, polylactic acid 15 are added in proportion
Part, 8 parts of poly phosphate, 9 parts of polycaprolactone, 22 parts of glycerol, 3 parts of Aluminate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent continues to stir
Mix and be warming up to 120～130 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110 DEG C, and rotating speed is
60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/nanometer two
Silicon oxide film.
<Embodiment 15>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, nano-silica
9 parts of SiClx, 10 parts of powder of Radix Puerariae, 15 parts of Fructus Musae powder, 17 parts of Biopolvester PHA, 20 parts of polylactic acid, 9 parts of poly phosphate gathers in oneself
12 parts of ester, 30 parts of glycerol, 4 parts of borate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 100 parts of above-mentioned tapioca, 15 parts of 10 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, then
The refrigerating chamber for being placed in -30 DEG C places 1h, and period is continually fed into nitrogen；9 parts of nano silicon is subsequently added under vacuum,
And be sufficiently mixed by homogenizer and obtain just mixed thing；Then add Biopolvester PHA17 parts, 20 parts of polylactic acid in proportion, gather
9 parts of phosphate ester, 12 parts of polycaprolactone, 30 parts of glycerol, 4 parts of borate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent continues to stir liter
Temperature sends into further melt blending 1h in banbury to 120～130 DEG C, and banbury temperature control is 110 DEG C, and rotating speed is 60r/
min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/nanometer titanium dioxide
Silicon thin film.
<Embodiment 16>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 80 parts of tapioca, polyvinyl alcohol
11 parts, 4 parts of nano silicon, 5 parts of powder of Radix Puerariae, 6 parts of Fructus Musae powder, 8 parts of Biopolvester PHA, 10 parts of polylactic acid, poly phosphate 6
Part, 5 parts of polycaprolactone, 15 parts of glycerol, 2 parts of titanate esters, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 80 parts of above-mentioned tapioca, 6 parts of 5 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；Subsequently add under vacuum 11 parts of polyvinyl alcohol and nanometer
4 parts of silicon dioxide, and be sufficiently mixed by homogenizer and obtain just mixed thing；Then add Biopolvester PHA8 parts in proportion, gather
10 parts of lactic acid, 6 parts of poly phosphate, 5 parts of polycaprolactone, 15 parts of glycerol, 2 parts of titanate esters, 1 part of antioxidant, 1 part of ultraviolet (UV) resistant agent,
Continue stirring and be warming up to 120～130 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110 DEG C,
Rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give tapioca/
Polyvinyl alcohol/nanometer titanium dioxide silicon thin film.
<Embodiment 17>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 90 parts of tapioca, polyvinyl alcohol
15 parts, 6 parts of hydrophilic nano-silicon dioxide, 7 parts of powder of Radix Puerariae, 11 parts of Fructus Musae powder, 13 parts of Biopolvester PHA, 15 parts of polylactic acid,
8 parts of poly phosphate, 9 parts of polycaprolactone, 22 parts of glycerol, 3 parts of borate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 90 parts of above-mentioned tapioca, 11 parts of 7 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, and then put
1h is placed in -30 DEG C of refrigerating chambers, period is continually fed into nitrogen；15 parts of polyvinyl alcohol and hydrophilic is subsequently added under vacuum
6 parts of type nano silicon, and be sufficiently mixed by homogenizer and obtain just mixed thing；Then Biopolvester is added in proportion
PHA13 parts, 15 parts of polylactic acid, 8 parts of poly phosphate, 9 parts of polycaprolactone, 22 parts of glycerol, 3 parts of borate, 3 parts of antioxidant, anti-purple
2 parts of outside line agent, continues stirring and is warming up to 120～130 DEG C, sends into further melt blending 1h, banbury temperature control in banbury
110 DEG C are made as, rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Final
To tapioca/polyvinyl alcohol/nanometer titanium dioxide silicon thin film.
<Embodiment 18>
A kind of tapioca degradable films, including：Following raw material in parts by weight, 100 parts of tapioca, polyvinyl alcohol
20 parts, 9 parts of nano silicon, 10 parts of powder of Radix Puerariae, 15 parts of Fructus Musae powder, 17 parts of Biopolvester PHA, 20 parts of polylactic acid, polyphosphoric acid
9 parts of ester, 12 parts of polycaprolactone, 30 parts of glycerol, 4 parts of Aluminate, 3 parts of antioxidant, 2 parts of ultraviolet (UV) resistant agent.
Preparation method is as follows：
By 100 parts of above-mentioned tapioca, 15 parts of 10 parts of powder of Radix Puerariae and Fructus Musae powder are refined to respectively 250 mesh and mix, then
The refrigerating chamber for being placed in -30 DEG C places 1h, and period is continually fed into nitrogen；20 parts of polyvinyl alcohol is subsequently added under vacuum and is received
9 parts of silicon dioxide of rice, and be sufficiently mixed by homogenizer and obtain just mixed thing；Then in proportion plus Biopolvester PHA17 parts,
20 parts of polylactic acid, 9 parts of poly phosphate, 12 parts of polycaprolactone, 30 parts of glycerol, 4 parts of Aluminate, 3 parts of antioxidant, ultraviolet (UV) resistant agent 2
Part, continue stirring and be warming up to 120～130 DEG C, further melt blending 1h in banbury is sent into, banbury temperature control is 110
DEG C, rotating speed is 60r/min.The temperature of vulcanizing press is 50 DEG C, and pressure is 15MPa, and the time is 5min.Finally give para arrowroot
Powder/polyvinyl alcohol/nanometer titanium dioxide silicon thin film.
Contrast test
Comparative example 1 adopts common starch based agricultural mulching film, and comparative example 2 makees mulch film using polychloroethylene film, with the present invention
Embodiment 2,5,8,11,14,17 carry out the contrast test of degradation rate, mechanical property and water resistance, comparing result such as table 1 below
It is shown, wherein the experiment condition of test degradation rate：The film sample of formed objects is imbedded into respectively underground, soil buries thickness and is
20cm, soil buries the time 30 days.The mechanical property of material is determined by tension test, film sample is cut into respectively dumbbell shape,
Its tensile strength is determined using stretching strength determination instrument, it is 15mm/min to determine draw speed.Determine the experiment of water resistance
Condition is：The film sample of formed objects is tiled respectively and edge is fixed on into dry soil surface, seen after 15 days rainy days
Examine the dry and wet degree of the soil covered by film sample.
Table 1
| Degradation rate/% | Tensile strength/MPa | Resistance to water | |
| Embodiment 2 | 95 | 24 | Keep initial drying regime |
| Embodiment 5 | 94 | 25 | Keep initial drying regime |
| Embodiment 8 | 95 | 26 | Keep initial drying regime |
| Embodiment 11 | 96 | 25 | Keep initial drying regime |
| Embodiment 14 | 95 | 28 | Keep initial drying regime |
| Embodiment 17 | 96 | 31 | Keep initial drying regime |
| Comparative example 1 | 92 | 17 | Ground moistening |
| Comparative example 2 | 78 | 19 | Ground moistening |
By contrast, the degradation rate of the tapioca degradable films of the present invention is generally higher than 95%, tensile strength
Also apparently higher than common starch based agricultural mulching film and the mulch film using polychloroethylene film, mechanical property and water resistance are excellent
It is good.
Although embodiment of the present invention is disclosed as above, it is not restricted to listed in description and embodiment
With, it can be applied to completely various suitable the field of the invention, for those skilled in the art, can be easily
Other modification is realized, therefore under the general concept limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details.
Claims (9)
1. a kind of tapioca degradable films, it is characterised in that including the raw material of following weight portion：Tapioca 80～100
Part, 0～20 part of polyvinyl alcohol is 0 when 0～10 part of nano silicon, wherein polyvinyl alcohol are different from nano silicon.
2. tapioca degradable films as claimed in claim 1, it is characterised in that the nano silicon is hydrophilic
Nano silicon.
3. tapioca degradable films as claimed in claim 2, it is characterised in that including the raw material of following weight portion：Wood
80～100 parts of sweet potato starch, 11～20 parts of polyvinyl alcohol.
4. tapioca degradable films as claimed in claim 2, it is characterised in that including the raw material of following weight portion：Wood
80～100 parts of sweet potato starch, 4～9 parts of nano silicon.
5. tapioca degradable films as claimed in claim 2, it is characterised in that including the raw material of following weight portion：Wood
80～100 parts of sweet potato starch, 4～9 parts of nano silicon, 11～20 parts of polyvinyl alcohol.
6. tapioca degradable films as described in any one of Claims 1 to 5, it is characterised in that further include following
The raw material of weight portion：5～10 parts of powder of Radix Puerariae, 6～15 parts of Fructus Musae powder, 8～17 parts of Biopolvester PHA, 10～20 parts of polylactic acid,
6～9 parts of poly phosphate, 5～12 parts of polycaprolactone, 15～30 parts of glycerol, 2～4 parts of coupling agent, 2～3 parts of antioxidant, uvioresistant
1～2 part of line agent, wherein coupling agent are the one kind in Aluminate, titanate esters or borate.
7. the preparation method of the tapioca degradable films as any one of Claims 1 to 5, it is characterised in that will
The raw material of above-mentioned parts by weight is refined, is mixed to get just mixed thing, and then melt blending, is finally pressed into thin film with vulcanizing press,
Obtain tapioca degradable films.
8. the preparation method of tapioca degradable films as claimed in claim 6, it is characterised in that by above-mentioned parts by weight
Tapioca be refined to 250 mesh respectively and mix with the powder of Radix Puerariae of 5～10 weight portions and the Fructus Musae powder of 6～15 weight portions, so
The refrigerating chamber for being placed in -30 DEG C afterwards places 1h, and period is continually fed into nitrogen；Subsequently above-mentioned parts by weight are added under vacuum
Nano silicon and polyvinyl alcohol are simultaneously sufficiently mixed by homogenizer and obtain just mixed thing；Then Biopolvester is added in proportion
It is the weight portions of PHA 8～17, the weight portion of polylactic acid 10～20, the weight portion of poly phosphate 6～9, the weight portion of polycaprolactone 5～12, sweet
Oily 15～30 weight portions, the weight portion of coupling agent 2～4, the weight portion of antioxidant 2～3, the weight portion of ultraviolet (UV) resistant agent 1～2, continue to stir
Mix and be warming up to 120～30 DEG C, send into further melt blending 1h in banbury, banbury temperature control is 110 DEG C, and rotating speed is
60r/min。
9. the preparation method of tapioca degradable films as claimed in claim 7, it is characterised in that the vulcanizing press
Temperature be 50 DEG C, pressure is 15MPa, and the time is 5min.
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| CN115260684A (en) * | 2022-08-11 | 2022-11-01 | 桂林理工大学 | Polyvinyl alcohol/starch nano composite material with high visible light transmittance and ultraviolet blocking function and preparation method thereof |
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