CN109401249A - A kind of lactic acid composite material and preparation method thereof of biomass enhancing - Google Patents
A kind of lactic acid composite material and preparation method thereof of biomass enhancing Download PDFInfo
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- CN109401249A CN109401249A CN201811301134.1A CN201811301134A CN109401249A CN 109401249 A CN109401249 A CN 109401249A CN 201811301134 A CN201811301134 A CN 201811301134A CN 109401249 A CN109401249 A CN 109401249A
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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
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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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
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- 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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Abstract
The invention belongs to the lactic acid composite materials and preparation method thereof that biodegradated polymer materal technical field more particularly to a kind of biomass enhance.Lactic acid composite material provided by the invention is by including that the raw material melt blending of following parts by weight of component is made: 100 parts of Poly L-lactic acid；5~25 parts of poly- L-lactic acid；5~30 parts of biological material；The biological material includes at least three kinds in starch, cellulose, lignin, wood powder, bamboo powder and straw powder；The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than the fusing point of Stereocomplex type polylactic acid.The experimental results showed that, lactic acid composite material provided by the invention has excellent mechanical property, heat resistance, crystal property and degradation property, yield strength is higher than 57MPa, heat distortion temperature is higher than 98 DEG C, crystallization half-life (Tc=130 DEG C)≤2.4min, number of days needed for 90% biological decomposition rate was at 65 days or less.
Description
Technical field
The polylactic acid enhanced the invention belongs to biodegradated polymer materal technical field more particularly to a kind of biomass is multiple
Condensation material and preparation method thereof.
Background technique
Polylactic acid (PLA) is further polymerize by that can become lactic acid with the amylofermentation that regenerated plant resources extract
Made of aliphatic polyester, be that more active one of kind is studied in aliphatic polyester.Polylactic acid glass transition temperature and
Fusing point is respectively 60 DEG C and 175 DEG C or so, is a kind of hard macromolecule in glassy state, hot property and polyphenyl at room temperature
Ethylene is similar.Polylactic acid has thermoplasticity, can be as the synthesis macromolecule such as PP, PS and PET on general process equipment
Carry out processing and forming.
Poly-lactic acid material belongs to Biodegradable material, buries after use in the soil, will by certain time
Natural decomposition is water and carbon dioxide, not will cause environmental pollution.Therefore, along with currently increasingly severeer Environmental Protection Situation,
Poly-lactic acid material starts the favor increasingly by market.
Although poly-lactic acid material has many advantages, such as, if as engineering plastics application, the mechanics of poly-lactic acid material
Performance and heat resistance or relatively low.Meanwhile market also proposed the crystal property and degradation property of poly-lactic acid material
Increasingly higher demands.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of lactic acid composite material of biomass enhancing and its preparation sides
Method, lactic acid composite material provided by the invention have excellent mechanical property, heat resistance, crystal property and degradation property.
The present invention provides a kind of lactic acid composite materials of biomass enhancing, by the raw material including following parts by weight of component
Melt blending is made:
100 parts of Poly L-lactic acid；
5~25 parts of poly- L-lactic acid；
5~30 parts of biological material；
The biological material includes at least three kinds in starch, cellulose, lignin, wood powder, bamboo powder and straw powder；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than the poly- cream of Stereocomplex type
The fusing point of acid.
Preferably, the starch includes one of tapioca, potato starch and cornstarch or a variety of.
Preferably, the partial size of the biological material is 180~500 mesh.
Preferably, the biological material includes tapioca, cellulose and lignin.
Preferably, the biological material includes cornstarch, straw powder and cellulose.
Preferably, the biological material includes lignin, wood powder and bamboo powder.
Preferably, the biological material includes cellulose, bamboo powder, straw powder and potato starch.
Preferably, the weight average molecular weight of the Poly L-lactic acid is 1~200,000；The weight average molecular weight of the poly- L-lactic acid
It is 1~200,000.
The present invention provides biomass described in a kind of above-mentioned technical proposal enhancing lactic acid composite material preparation method,
The following steps are included:
A) by Poly L-lactic acid, poly- L-lactic acid and biological material melt blending, the polylactic acid of biomass enhancing is obtained
Composite material；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than the poly- cream of Stereocomplex type
The fusing point of acid.
Preferably, the temperature of the melt blending is 150~170 DEG C；The time of the melt blending is preferably 5~
15min。
Compared with prior art, the present invention provides a kind of lactic acid composite material of biomass enhancing and its preparation sides
Method.Lactic acid composite material provided by the invention is by including that the raw material melt blending of following parts by weight of component is made: gathering left-handed cream
100 parts of acid；5~25 parts of poly- L-lactic acid；5~30 parts of biological material；The biological material includes starch, cellulose, wood
At least three kinds in quality, wood powder, bamboo powder and straw powder；The temperature of the melt blending is higher than Poly L-lactic acid and poly- dextrorotation cream
The fusing point of acid, lower than the fusing point of Stereocomplex type polylactic acid.Scheme provided by the invention is using the poly- cream of watery fusion processing preparation
Sour conducing composite material, in such processing temperature section, Poly L-lactic acid and poly- L-lactic acid can melt completely, only
Stereocomplex type polylactic acid crystal can be grown, once being formed Stereocomplex type polylactic acid crystal, will be divided in the form of solid phase
It is dispersed in polylactic resin, what is be formed in situ Stereocomplex type polylactic acid crystal and the particular organisms that are added in polylactic resin
Material collision, is dispersed in these biological materials in polylactic resin, not only effectively improves the mechanics of composite material
Performance, heat resistance and degradation property have also speeded up Poly L-lactic acid crystallization, improve the crystal property of composite material.Experiment knot
Fruit shows that the yield strength of lactic acid composite material provided by the invention is higher than 57MPa, and heat distortion temperature is higher than 98 DEG C, crystallization
Half-life period (Tc=130 DEG C)≤2.4min, number of days needed for 90% biological decomposition rate was at 65 days or less.
Specific embodiment
The following is a clear and complete description of the technical scheme in the embodiments of the invention, it is clear that described embodiment
Only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
The present invention provides a kind of lactic acid composite materials of biomass enhancing, by the raw material including following parts by weight of component
Melt blending is made:
100 parts of Poly L-lactic acid；
5~25 parts of poly- L-lactic acid；
5~30 parts of biological material；
The biological material includes at least three kinds in starch, cellulose, lignin, wood powder, bamboo powder and straw powder；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than the poly- cream of Stereocomplex type
The fusing point of acid.
Polylactic acid heat-conductive composite material provided by the invention is made of raw material melt blending, wherein the raw material includes poly-
D-lactic acid, poly- L-lactic acid and biological material.In the present invention, the weight average molecular weight of the Poly L-lactic acid is preferably 1
~20 ten thousand, concretely 10,000,20,000,30,000,40,000,50,000,60,000,70,000,80,000,90,000,100,000,110,000,120,000,130,000,140,000,
150000,160,000,170,000,180,000,190,000 or 200,000.
In the present invention, the weight average molecular weight of the poly- L-lactic acid is preferably 1~200,000, and concretely 10,000,20,000,3
Ten thousand, 40,000,50,000,60,000,70,000,80,000,90,000,100,000,110,000,120,000,130,000,140,000,150,000,160,000,170,000,180,000,190,000
Or 200,000.It in the present invention, is in terms of 100 parts by weight by the content of Poly L-lactic acid in the feed, the poly- L-lactic acid is in original
Content in material is 5~25 parts by weight, concretely 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 weights
Measure part, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight,
19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight or 25 parts by weight.
In the present invention, the biological material includes in starch, cellulose, lignin, wood powder, bamboo powder and straw powder
At least three kinds, preferably three kinds or four kinds；The partial size of the biological material is 180~500 mesh, concretely 180 mesh, 190
Mesh, 200 mesh, 250 mesh, 300 mesh, 350 mesh, 400 mesh, 450 mesh or 500 mesh.It is described in one embodiment provided by the invention
Biological material includes tapioca, cellulose and lignin, and the mass ratio of the tapioca, cellulose and lignin is preferred
For 5:(1~10): (1~10), more preferably 5:(3~7): (3~7), most preferably 5:5:5.Provided by the invention another
In a embodiment, the biological material includes cornstarch, straw powder and cellulose, the cornstarch, straw powder and fibre
The mass ratio of dimension element is preferably 8:(3~15): (0.5~5), more preferably 8:(5~10): (1~3), most preferably 8:8:2.
In other embodiments provided by the invention, the biological material includes lignin, wood powder and bamboo powder, the lignin, wood
Powder and the mass ratio of bamboo powder are preferably 5:(1~20): (1~25), more preferably 5:(5~10): (5~16), most preferably 5:
10:5 or 5:5:16.In other embodiments provided by the invention, the biological material includes cellulose, bamboo powder, straw powder
And potato starch, the cellulose, bamboo powder, straw powder and potato starch mass ratio be preferably 2:(0.2~3): (2~
15): (1~10), more preferably 2:(0.5~1.5): (5~10): (3~8), most preferably 2:1:8:5.
It in the present invention, is in terms of 100 parts by weight by the content of Poly L-lactic acid in the feed, the biological material is in original
Content in material is 5~30 parts by weight, concretely 5 parts by weight, 6 parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 weights
Measure part, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight,
19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 weights
Measure part, 28 parts by weight, 29 parts by weight or 30 parts by weight.
In the present invention, the temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than vertical
The fusing point of the compound polylactic acid of structure, preferably 150~170 DEG C, concretely 150 DEG C, 155 DEG C, 160 DEG C, 165 DEG C or 170 DEG C.
The present invention also provides a kind of preparation sides of the lactic acid composite material of the enhancing of biomass described in above-mentioned technical proposal
Method, comprising the following steps:
A) by Poly L-lactic acid, poly- L-lactic acid and biological material melt blending, the polylactic acid of biomass enhancing is obtained
Composite material；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than the poly- cream of Stereocomplex type
The fusing point of acid.
In preparation method provided by the invention, first by Poly L-lactic acid, poly- L-lactic acid and biological material press than
Example melt blending.Wherein, the Poly L-lactic acid, poly- L-lactic acid and biological material be preferably before carrying out melting mixing,
First it is dried；The temperature of the drying is preferably 70~120 DEG C, be specifically as follows 70 DEG C, 75 DEG C, 80 DEG C, 85 DEG C, 90 DEG C,
95 DEG C, 100 DEG C, 105 DEG C, 110 DEG C, 115 DEG C or 120 DEG C；The time of the drying is preferably 3~6h, concretely 3h, 4h,
5h or 6h.In the present invention, the temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than vertical structure
The fusing point of compound polylactic acid, preferably 150~170 DEG C, concretely 150 DEG C, 155 DEG C, 160 DEG C, 165 DEG C or 170 DEG C；Institute
Melt blending to be stated preferably to carry out under agitation, the rate of the stirring is preferably 60~100 revs/min, concretely 60 turns/
Divide, 70 revs/min, 80 revs/min, 90 revs/min or 100 revs/min；The time of the melt blending is preferably 5~15min, specifically may be used
For 5min, 6min, 7min, 8min, 9min, 10min, 11min, 12min, 13min, 14min or 15min.Melt blending terminates
Afterwards, blend melt is cooled down, and obtains the lactic acid composite material of biomass enhancing provided by the invention.
Scheme provided by the invention is using watery fusion processing preparation polylactic acid conducing composite material, in such processing temperature
Section is spent, Poly L-lactic acid and poly- L-lactic acid can melt completely, and only Stereocomplex type polylactic acid crystal can be grown,
Stereocomplex type polylactic acid crystal once being formed will be dispersed in polylactic resin in the form of solid phase, and what is be formed in situ is vertical
Specific biomass material impacts structure compound polylactic acid crystal and be added in polylactic resin, keep these biological materials equal
It is even to be scattered in polylactic resin, the mechanical property, heat resistance and degradation property of composite material are not only effectively improved, is also speeded up
Poly L-lactic acid crystallization, improves the crystal property of composite material.The experimental results showed that polylactic acid composite wood provided by the invention
The yield strength of material is higher than 57MPa, and heat distortion temperature is higher than 98 DEG C, and crystallization half-life (Tc=130 DEG C)≤2.4min, 90% is raw
Number of days needed for object resolution ratio was at 65 days or less.
For the sake of becoming apparent from, it is described in detail below by following embodiment.
Raw material (Poly L-lactic acid, poly- L-lactic acid, the biological material used in the following embodiment and comparative examples of the present invention
Material) before carrying out melting mixing, it is firstly placed in 80 DEG C of vacuum oven and is dried, dry 3h.
Embodiment 1
Weigh weight average molecular weight be 100,000 100 parts by weight of Poly L-lactic acid, 5 parts by weight of tapioca of 300 mesh, 300
5 parts by weight of purpose cellulose, 5 parts by weight of lignin of 300 mesh, 20 parts by weight of poly- L-lactic acid that weight average molecular weight is 100,000；
Above-mentioned raw materials are mixed into 15min under conditions of 160 DEG C, 80 revs/min, are cooled to room temperature after blending, biomass enhancing is obtained
Lactic acid composite material.
Embodiment 2
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 10,000,8 parts by weight of cornstarch of 200 mesh, 200 mesh
8 parts by weight of straw powder, 2 parts by weight of cellulose of 200 mesh, weight average molecular weight be 10,000 15 parts by weight of poly- L-lactic acid；It will be upper
It states raw material and mixes 15min under conditions of 170 DEG C, 80 revs/min, be cooled to room temperature after blending, obtain the poly- of biomass enhancing
Lactic acid composite.
Embodiment 3
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 50,000,2.5 parts by weight of lignin of 180 mesh, 500 mesh
2.5 parts by weight of wood powder, 8 parts by weight of bamboo powder of 200 mesh, weight average molecular weight be 50,000 5 parts by weight of poly- L-lactic acid；It will be above-mentioned
Raw material mixes 10min under conditions of 170 DEG C, 80 revs/min, is cooled to room temperature after blending, obtains the poly- cream of biomass enhancing
Sour composite material.
Embodiment 4
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 200,000,2 parts by weight of cellulose of 350 mesh, 400 mesh
1 parts by weight of bamboo powder, 8 parts by weight of straw powder of 200 mesh, 5 parts by weight of potato starch of 250 mesh, weight average molecular weight be 200,000
15 parts by weight of poly- L-lactic acid；Above-mentioned raw materials are mixed into 10min under conditions of 160 DEG C, 80 revs/min, it is cooling after blending
To room temperature, the lactic acid composite material of biomass enhancing is obtained.
Embodiment 5
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 150,000,5 parts by weight of bamboo powder of 300 mesh, 350 purposes
10 parts by weight of wood powder, 5 parts by weight of lignin of 300 mesh, 10 parts by weight of poly- L-lactic acid that weight average molecular weight is 150,000；It will be above-mentioned
Raw material mixes 5min under conditions of 160 DEG C, 80 revs/min, is cooled to room temperature after blending, obtains the polylactic acid of biomass enhancing
Composite material.
Comparative example 1
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 100,000,20 parts by weight of tapioca of 300 mesh；It will
Above-mentioned raw materials mix 15min under conditions of 160 DEG C, 80 revs/min, are cooled to room temperature after blending, obtain biomass enhancing
Lactic acid composite material.
Comparative example 2
Weigh weight average molecular weight be 100,000 100 parts by weight of Poly L-lactic acid, 15 parts by weight of cornstarch of 200 mesh, 200
15 parts by weight of purpose cellulose；Above-mentioned raw materials are mixed into 15min under conditions of 160 DEG C, 80 revs/min, are cooled to after blending
Room temperature obtains the lactic acid composite material of biomass enhancing.
Comparative example 3
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 100,000,12 parts by weight of lignin of 350 mesh, 350 mesh
15 parts by weight of straw powder；Above-mentioned raw materials are mixed into 15min under conditions of 160 DEG C, 80 revs/min, are cooled to room after blending
Temperature obtains the lactic acid composite material of biomass enhancing.
Comparative example 4
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 100,000,17 parts by weight of tapioca of 300 mesh, weight
20 parts by weight of poly- L-lactic acid that average molecular weight is 100,000；Above-mentioned raw materials are mixed under conditions of 160 DEG C, 80 revs/min
15min is cooled to room temperature after blending, obtains the lactic acid composite material of biomass enhancing.
Comparative example 5
100 parts by weight of Poly L-lactic acid that weight average molecular weight is 100,000 are weighed, 17 parts by weight of cellulose of 300 mesh, weight is
20 parts by weight of poly- L-lactic acid that molecular weight is 100,000；Above-mentioned raw materials are mixed under conditions of 160 DEG C, 80 revs/min
15min is cooled to room temperature after blending, obtains the lactic acid composite material of biomass enhancing.
Comparative example 6
100 parts by weight of Poly L-lactic acid that weight average molecular weight is 100,000 are weighed, 17 parts by weight of lignin of 300 mesh, weight is
20 parts by weight of poly- L-lactic acid that molecular weight is 100,000；Above-mentioned raw materials are mixed under conditions of 160 DEG C, 80 revs/min
15min is cooled to room temperature after blending, obtains the lactic acid composite material of biomass enhancing.
Comparative example 7
100 parts by weight of Poly L-lactic acid that weight average molecular weight is 150,000 are weighed, 22 parts by weight of bamboo powder of 300 mesh are divided equally again
10 parts by weight of poly- L-lactic acid that son amount is 150,000；Above-mentioned raw materials are mixed into 5min under conditions of 160 DEG C, 80 revs/min, altogether
It is cooled to room temperature after mixed, obtains the lactic acid composite material of biomass enhancing.
Comparative example 8
100 parts by weight of Poly L-lactic acid that weight average molecular weight is 150,000 are weighed, 22 parts by weight of wood powder of 350 mesh are divided equally again
10 parts by weight of poly- L-lactic acid that son amount is 150,000；Above-mentioned raw materials are mixed into 5min under conditions of 160 DEG C, 80 revs/min, altogether
It is cooled to room temperature after mixed, obtains the lactic acid composite material of biomass enhancing.
Comparative example 9
100 parts by weight of Poly L-lactic acid that weight average molecular weight is 150,000 are weighed, 22 parts by weight of lignin of 300 mesh, weight is
10 parts by weight of poly- L-lactic acid that molecular weight is 150,000；Above-mentioned raw materials are mixed into 5min under conditions of 160 DEG C, 80 revs/min,
It is cooled to room temperature after blending, obtains the lactic acid composite material of biomass enhancing.
Comparative example 10
Weigh 100 parts by weight of Poly L-lactic acid that weight average molecular weight is 150,000,5 parts by weight of bamboo powder of 300 mesh, 350 purposes
10 parts by weight of wood powder, 5 parts by weight of lignin of 300 mesh, 10 parts by weight of poly- L-lactic acid that weight average molecular weight is 150,000；It will be above-mentioned
Raw material mixes 5min under conditions of 200 DEG C, 80 revs/min, is cooled to room temperature after blending, obtains the polylactic acid of biomass enhancing
Composite material.
Performance test
The composite material prepared to above-described embodiment and comparative example carries out mechanical property, heat resistance, crystal property and drop
Solve performance measurement.Wherein, Mechanics Performance Testing is referring to the quasi- GB/T 1040.1-2006 of sighting target；Heat resistance tests reference standard
GB/T 1634.3-2004；Degradation property tests reference standard GB/T2672-2005.Crystal property is surveyed in accordance with the following methods
It is fixed: to take the composite material being prepared, be cut into fritter as sample to be tested and carry out isothermal crystal measurement, specific continuous mode
Are as follows: first under nitrogen protection by sample to be tested, 190 DEG C are raised to from room temperature with 50 DEG C/min, stop 2min and eliminate thermal history, so
It is cooled to 0 DEG C with 10 DEG C/min afterwards, it is completely amorphous to ensure that 10 DEG C/min of sample is warming up to 190 DEG C of meltings 2 minutes later
State is finally quickly cooled to required crystallization temperature (Tc) with 45 DEG C/min of cooling rate, can must be crystallized by test and partly be declined
Phase t1/2.Measurement result is as shown in table 1:
1 mechanical property of table, heat resistance, crystal property and degradation property test result
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of lactic acid composite material of biomass enhancing, is made of the raw material melt blending for including following parts by weight of component:
100 parts of Poly L-lactic acid；
5~25 parts of poly- L-lactic acid；
5~30 parts of biological material；
The biological material includes at least three kinds in starch, cellulose, lignin, wood powder, bamboo powder and straw powder；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than Stereocomplex type polylactic acid
Fusing point.
2. composite material according to claim 1, which is characterized in that the starch includes tapioca, potato starch
With one of cornstarch or a variety of.
3. composite material according to claim 1, which is characterized in that the partial size of the biological material is 180~500
Mesh.
4. composite material according to claim 1, which is characterized in that the biological material includes tapioca, fiber
Element and lignin.
5. composite material according to claim 1, which is characterized in that the biological material includes cornstarch, stalk
Powder and cellulose.
6. composite material according to claim 1, which is characterized in that the biological material include lignin, wood powder and
Bamboo powder.
7. composite material according to claim 1, which is characterized in that the biological material includes cellulose, bamboo powder, straw
Stalk powder and potato starch.
8. composite material according to claim 1, which is characterized in that the weight average molecular weight of the Poly L-lactic acid be 1~
200000；The weight average molecular weight of the poly- L-lactic acid is 1~200,000.
9. a kind of preparation method of the lactic acid composite material of any one of claim 1~8 biomass enhancing, including it is following
Step:
A) by Poly L-lactic acid, poly- L-lactic acid and biological material melt blending, the polylactic acid for obtaining biomass enhancing is compound
Material；
The temperature of the melt blending is higher than the fusing point of Poly L-lactic acid and poly- L-lactic acid, lower than Stereocomplex type polylactic acid
Fusing point.
10. preparation method according to claim 9, which is characterized in that the temperature of the melt blending is 150~170 DEG C；
The time of the melt blending is 5~15min.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662485A (en) * | 2020-06-19 | 2020-09-15 | 广州扬新科技有限公司 | Degradable plastic containing lignin-carbohydrate and preparation method thereof |
| CN113563705A (en) * | 2021-08-05 | 2021-10-29 | 东莞市精盛橡塑有限公司 | Production process of degradable and high-temperature-resistant dinner plate |
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| CN103937183A (en) * | 2014-04-30 | 2014-07-23 | 东华大学 | Preparation method of natural plant fiber/stereo polylactic acid composite material |
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| CN103937183A (en) * | 2014-04-30 | 2014-07-23 | 东华大学 | Preparation method of natural plant fiber/stereo polylactic acid composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111662485A (en) * | 2020-06-19 | 2020-09-15 | 广州扬新科技有限公司 | Degradable plastic containing lignin-carbohydrate and preparation method thereof |
| CN111662485B (en) * | 2020-06-19 | 2022-10-11 | 山东福德宝新型建材有限公司 | Degradable plastic containing lignin-carbohydrate and preparation method thereof |
| CN113563705A (en) * | 2021-08-05 | 2021-10-29 | 东莞市精盛橡塑有限公司 | Production process of degradable and high-temperature-resistant dinner plate |
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| CN109401249B (en) | 2020-04-07 |
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