CN109553941A - A kind of biology base full degradation chopsticks material and preparation method thereof - Google Patents
A kind of biology base full degradation chopsticks material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to chopsticks field of material technology, more particularly to a kind of biology base full degradation chopsticks material and preparation method thereof, chopsticks material includes L-PLA, mineral powder, glass fibre, biodegradation promotor, lubricant and nucleating agent, the present invention is using L-PLA as basic resin, mineral powder is added and glass powder carries out enhancing modification, effectively improve the tensile property and shock resistance of PLA material, and it is added after biodegradation promotor, the degradation property of PLA material can be further speeded up, in the case where natural degradation, ultimately generate carbon dioxide and water, participate in the photosynthesis of plant, not only no pollution to the environment, and it can achieve the effect of degradable, the residual heavy rate of degradation after 8 months can be reduced to 11.4% or less.
Description
Technical field
The present invention relates to chopsticks field of material technology, and in particular to a kind of biology base full degradation chopsticks material and its preparation side
Method.
Background technique
The problems such as worldwide environmental degradation, resource shortage, becomes increasingly conspicuous, dirt of the ecological solid waste to environment
Dye and caused problem of resource waste are got worse.With the continuous improvement of economic development and living standards of the people, solid
The discharge amount of waste is increased sharply.It is estimated that the whole world increases about 10,000,000,000 tons, per capita 2 tons of solid waste newly every year.Growing
Solid waste brings great challenge to environment for human survival, it has also become one of principal element of environmental pollution.
Polylactic acid (Polylactic acid, abbreviation PLA) is that the best biology of the synthesis physical property of developed recently out can drop
Plastics are solved, environment is absolutely not polluted, it, can be complete by microorganism in nature after use with good biodegradability
Degradable ultimately generates carbon dioxide and water, free from environmental pollution, meets requirement of the world today to environmental protection；But polylactic acid
Crystallization is slow, ester bond bond energy is small in strand, is easily broken off and causes that the heat distortion temperature of polylactic acid is low, impact strength is low, toughness
The problems such as bad.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of biology base is high-fall
Chopsticks material is solved, mechanical and physical performance and degradation property are good, and another object of the present invention is to provide the biology base chopsticks materials
Preparation method, the simple process of preparation, subsequent forming speed is fast, be conducive to industrialized production.
The purpose of the invention is achieved by the following technical solution:
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
The present invention is added mineral powder and glass powder carries out enhancing modification, effectively improve PLA using L-PLA as basic resin
The tensile property and shock resistance of material, and be added after biodegradation promotor, PLA material can be further speeded up
Degradation property ultimately generates carbon dioxide and water in the case where natural degradation, the photosynthesis of plant is participated in, not only to ring
Border is pollution-free, and can achieve the effect of degradable, and the residual heavy rate of the degradation after 8 months can be reduced to 11.4% or less.
Preferably, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 8~10g/10min, and test condition is 210 DEG C/2.16kg, vitrifying
Transition temperature is 60~65 DEG C, and crystallization temperature is 155~160 DEG C.
Wherein, the melt index of the D-PLA is 2~8g/10min, and test condition is 210 DEG C/2.16kg, and vitrifying turns
Temperature is 55~60 DEG C, and crystallization temperature is 155~160 DEG C.
General L-PLA has preferably rigidity performance compared with D-PLA, and the L-PLA that the present invention selects is in toughness and processing stream
Dynamic property is more excellent, and the promotion that tensile property, bending property and impact strength may be implemented is blended with the D-PLA of selection, and
And still there is preferable biological degradability.
Wherein, the mineral powder is talcum powder, calcium carbonate and kaolinic one or more, the mesh of the mineral powder
Number is 3000~10000 mesh.
In general, being more likely to compare using nano material and significantly improve material in inorganic modified material at present
Mechanical performance, and the mineral powder that the present invention uses is between 3000~10000 mesh, is micron-sized mineral powder, in the present invention
The matrix resin of specific physical property has preferable compatibility, more significant in the promotion degree of mechanical performance, and cost is lower.
Preferably, the mineral powder is the calcium carbonate of 5000 mesh and/or the talcum powder of 3000 mesh.The calcium carbonate of 5000 mesh is readily dispersed in
In matrix resin, and 3000 mesh talcum powder have PLA the nucleation of part, can also promote the mobility of entire material.
It is further preferred that the mineral powder by 5000 mesh calcium carbonate and 3000 mesh talcum powder by weight 2-3:1 ratio group
At larger to the promotion of mechanical property.
Wherein, the diameter of the glass fibre is 13~17 μm, and line density is 1000~2000g/km.Glass fibre can be with
It is effectively improved the mechanical property of PLA material, improves the performance of its warpage preventing, and the glass fibre that the present invention selects has in PLA
There is preferable dispersibility, it will not there is a phenomenon where stress to concentrate.
Wherein, the biodegradation promotor is that calcium dihydrogen phosphate, potassium dihydrogen phosphate and the butyl acrylate of grafting are a kind of
Or more than one.The butyl acrylate of grafting specifically refers to the n-BMA BMA of LG Corp of South Korea production, the present invention
The biodegradation promotor of selection can be rapidly decomposed into free radical in the soil, and free radical can promote PLA, PBAT and PCL
Molecular chain rupture, to greatly shorten the degradation time of matrix resin.It is further preferred that the biodegradation promotor is by phosphorus
Acid dihydride calcium and potassium dihydrogen phosphate are formed by weight the ratio of 1:1, to L-PLA and the D-PLA matrix resin being combined
It is more significant that degradability promotes degree.
Wherein, the lubricant be one of pentaerythritol stearate, zinc stearate and calcium stearate or it is a kind of with
On.The processing fluidity of each material can be enhanced in lubricant, makes conducive to the uniform mixing of material each in melting process and extrusion
Grain.Preferably, lubricant is pentaerythritol stearate and/or calcium stearate, can be risen using pentaerythrite stearic acid merely
To lubricating action, but there is slight precipitation, surface is too bright, and calcium stearate effectively plays photoextinction, reduces Ji Wusi
The stearic precipitation of alcohol.It is further preferred that the lubricant is by pentaerythritol stearate and calcium stearate by weight 2:1
Ratio composition, which can greatly improve the processing fluidity of composite material, and also substantially without pentaerythrite
Stearic precipitation phenomenon occurs.
Wherein, the nucleating agent is inorganic laminated silicate, nano silica and 1, one kind of 3,5- benzene tri carboxylic acid amides
Or more than one.Nucleating agent is accelerated crystalline rate, is increased crystal density and promote crystal grain ruler by the crystallization behavior of change resin
Very little miniaturization reaches and shortens molding cycle, improve the product transparency, lustrous surface, tensile strength, rigidity, heat distortion temperature, resist
The physical mechanical properties such as impact, creep resistance.Preferably, nucleating agent is inorganic laminated silicate and/or organic 1,3,5- benzene
Tri carboxylic acid amide, the crystal grain of inorganic laminated silicate refinement PLA crystallization, increases intensity, organic 1,3,5- benzene tri carboxylic acid amides can make
PLA rapid crystallization shortens molding cycle.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA and D-PLA being measured by formula and 2~4min being mixed with the revolving speed of 300~500r/min, it is mixed to obtain first
Close material；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, mixes 5 with the revolving speed of 500~800r/min
~10min obtains the second mixture；
(3) biodegradation promotor is added into the second mixture, 60~90 DEG C is warming up to, with 800~1000r/min's
Revolving speed mixes 6~10min, obtains third mixture；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 170~200 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
The beneficial effects of the present invention are: the present invention is added mineral powder and glass powder carries out using L-PLA as basic resin
Enhancing is modified, and effectively improves the tensile property and shock resistance of PLA material, and be added after biodegradation promotor, can
To further speed up the degradation property of PLA material, in the case where natural degradation, carbon dioxide and water are ultimately generated, participates in planting
The photosynthesis of object, not only no pollution to the environment, but also can achieve the effect of degradable, the residual heavy rate of the degradation after 8 months can
To be reduced to 11.4% or less.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 9g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 62 DEG C, and crystallization temperature is 157 DEG C.
Wherein, the melt index of the D-PLA is 5g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 57 DEG C, and crystallization temperature is 157 DEG C.
Wherein, the mineral powder is talcum powder, and the mesh number of the mineral powder is 3000 mesh.
Wherein, the diameter of the glass fibre is 13 μm, line density 1000g/km.
Wherein, the biodegradation promotor is calcium dihydrogen phosphate.
Wherein, the lubricant is pentaerythritol stearate.
Wherein, the nucleating agent is inorganic laminated silicate.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA and D-PLA is measured with the revolving speed mixing 3min of 400r/min by formula, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, is mixed with the revolving speed of 650r/min
7.5min obtains the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 75 DEG C, mixed with the revolving speed of 900r/min
8min obtains third mixture；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 185 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
Embodiment 2
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 9g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 62 DEG C, and crystallization temperature is 157 DEG C.
Wherein, the mineral powder is calcium carbonate, and the mesh number of the mineral powder is 5000 mesh.
Wherein, the diameter of the glass fibre is 14 μm, line density 1200g/km.
Wherein, the biodegradation promotor is potassium dihydrogen phosphate.
Wherein, the lubricant is zinc stearate.
Wherein, the nucleating agent is nano silica.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA is measured with the revolving speed mixing 3min of 400r/min by formula, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, is mixed with the revolving speed of 650r/min
7.5min obtains the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 75 DEG C, mixed with the revolving speed of 900r/min
8min obtains third mixture；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 185 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
Embodiment 3
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 9g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 62 DEG C, and crystallization temperature is 157 DEG C.
Wherein, the melt index of the D-PLA is 5g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 57 DEG C, and crystallization temperature is 157 DEG C.
Wherein, the mineral powder is kaolin, and the mesh number of the mineral powder is 8000 mesh.
Wherein, the diameter of the glass fibre is 17 μm, line density 2000g/km.
Wherein, the biodegradation promotor is the butyl acrylate of grafting.
Wherein, the lubricant is calcium stearate.
Wherein, the nucleating agent is 1,3,5- benzene tri carboxylic acid amides.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA and D-PLA is measured with the revolving speed mixing 3min of 400r/min by formula, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, is mixed with the revolving speed of 650r/min
7.5min obtains the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 75 DEG C, mixed with the revolving speed of 900r/min
8min obtains third mixture；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 185 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
Embodiment 4
The present embodiment the difference from embodiment 1 is that:
The mineral powder is made of the calcium carbonate of 5000 mesh and the talcum powder of 3000 mesh by weight the ratio of 2.5:1.
Embodiment 5
The present embodiment the difference from embodiment 1 is that:
The mineral powder is the talcum powder of 100nm.
Embodiment 6
The present embodiment the difference from embodiment 1 is that:
The biodegradation promotor is made of calcium dihydrogen phosphate and potassium dihydrogen phosphate by weight the ratio of 1:1.
Embodiment 7
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 8g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 60 DEG C, and crystallization temperature is 155 DEG C.
Wherein, the melt index of the D-PLA is 2g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 55 DEG C, and crystallization temperature is 155 DEG C.
Wherein, the mineral powder is talcum powder, and the mesh number of the mineral powder is 3000 mesh.
Wherein, the diameter of the glass fibre is 13 μm, line density 1000g/km.
Wherein, the biodegradation promotor is calcium dihydrogen phosphate.
Wherein, the lubricant is pentaerythritol stearate.
Wherein, the nucleating agent is inorganic laminated silicate.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA and D-PLA is measured with the revolving speed mixing 4min of 300r/min by formula, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, with the revolving speed mixing 10min of 500r/min,
Obtain the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 60 DEG C, with the revolving speed of 800~1000r/min
10min is mixed, third mixture is obtained；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 170 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
Embodiment 8
A kind of biology base full degradation chopsticks material, the raw material including following parts by weight:
Wherein, the melt index of the L-PLA is 10g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 65 DEG C, and crystallization temperature is 160 DEG C.
Wherein, the melt index of the D-PLA is 8g/10min, and test condition is 210 DEG C/2.16kg, glass transition
Temperature is 60 DEG C, and crystallization temperature is 60 DEG C.
Wherein, the mineral powder is calcium carbonate, and the mesh number of the mineral powder is 10000 mesh.
Wherein, the diameter of the glass fibre is 17 μm, line density 2000g/km.
Wherein, the biodegradation promotor is potassium dihydrogen phosphate.
Wherein, the lubricant is zinc stearate.
Wherein, the nucleating agent is nano silica.
The preparation method of biology base full degradation chopsticks material as described above, characterized by the following steps:
(1) L-PLA and D-PLA is measured with the revolving speed mixing 2min of 500r/min by formula, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, with the revolving speed mixing 5min of 800r/min,
Obtain the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 90 DEG C, mixed with the revolving speed of 1000r/min
6min obtains third mixture；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
Melting extrusion is carried out in 200 DEG C of temperature to get the biology base full degradation chopsticks material is arrived.
Comparative example 1
This comparative example the difference from embodiment 1 is that:
Biodegradation promotor is not added.
The present invention is tested for the property embodiment 1-6 and comparative example 1, the result is as follows:
By the comparison of embodiment 1, embodiment 4 and embodiment 5 it is found that preferably compounding mineral powder can promote chopsticks material
Mechanical property degradation property, on the contrary, the talcum powder of nano-scale will cause the decline of mechanical property.
By the comparison of embodiment 1, embodiment 6 and comparative example 1 it is found that biodegradation promotor is added to the power of chopsticks material
Learning performance influences very little, but degradation property is obviously improved, and selects the biodegradation promotor properly compounded more can be into
One step improves degradation property, and 9.4% residual heavy rate may be implemented under 8 months natural degradations.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way,
Do not depart under the premise of present inventive concept it is any obviously replace it is within the scope of the present invention.
Claims (10)
1. a kind of biology base full degradation chopsticks material, it is characterised in that: the raw material including following parts by weight:
2. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: including following parts by weight
Raw material:
3. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the melting of the L-PLA
Index is 8~10g/10min, and test condition is 210 DEG C/2.16kg, and glass transition temperature is 60~65 DEG C, and crystallization temperature is
155~160 DEG C.
4. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the melting of the D-PLA
Index is 2~8g/10min, and test condition is 210 DEG C/2.16kg, and glass transition temperature is 55~60 DEG C, and crystallization temperature is
155~160 DEG C.
5. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the mineral powder is talcum
Powder, calcium carbonate and kaolinic one or more, the mesh number of the mineral powder are 3000~10000 mesh.
6. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the glass fibre it is straight
Diameter is 13~17 μm, and line density is 1000~2000g/km.
7. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the biodegrade promotes
Agent is that calcium dihydrogen phosphate, potassium dihydrogen phosphate and the butyl acrylate of grafting are one or more kinds of.
8. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the lubricant is season penta
One of tetrol stearate, zinc stearate and calcium stearate or more than one.
9. a kind of biology base full degradation chopsticks material according to claim 1, it is characterised in that: the nucleating agent is inorganic
The one or more of phyllosilicate, nano silica and 1,3,5- benzene tri carboxylic acid amide.
10. the preparation method of biology base full degradation chopsticks material described in claim 1-9 any one, it is characterised in that: including
Following steps:
(1) L-PLA and D-PLA is measured by formula and 2~4min is mixed with the revolving speed of 300~500r/min, obtain the first mixture；
(2) mineral powder, lubricant and nucleating agent are added into the first mixture, with the revolving speed mixing 5 of 500~800r/min~
10min obtains the second mixture；
(3) biodegradation promotor is added into the second mixture, is warming up to 60~90 DEG C, with the revolving speed of 800~1000r/min
6~10min is mixed, third mixture is obtained；
(4) third mixture being added from the main spout of extruder, glass fibre is added from the side spout of extruder,
170~200 DEG C of temperature carries out melting extrusion to get the biology base full degradation chopsticks material is arrived.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112029154A (en) * | 2019-12-31 | 2020-12-04 | 锐保新材料科技(上海)有限公司 | Biodegradable material and preparation method thereof |
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