CN106189131A - Polylactic acid/the elastomer of the resistance to thermal conducting of ultra-toughness/carbon nano-particles composite or goods and preparation method thereof - Google Patents
Polylactic acid/the elastomer of the resistance to thermal conducting of ultra-toughness/carbon nano-particles composite or goods and preparation method thereof Download PDFInfo
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- CN106189131A CN106189131A CN201610548048.5A CN201610548048A CN106189131A CN 106189131 A CN106189131 A CN 106189131A CN 201610548048 A CN201610548048 A CN 201610548048A CN 106189131 A CN106189131 A CN 106189131A
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- 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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Abstract
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness disclosed by the invention or goods are first Poly-L-lactic acid and carbon nano-particles to be carried out melting mixing, make Poly-L-lactic acid matrix form Stereocomplex crystal on blend boundary with the dextrorotation polylactic acid in elastic dispersed phase the most again with the elastomer melt blending containing dextrorotation polylactic acid chain segment, this Stereocomplex crystal can will be fixed on boundary at the carbon nano-particles of two alternate migrations, and then acquisition matrix degree of crystallinity is 45.2～48.7%, heat resisting temperature is 97.8～145.4 DEG C, notch impact strength is 12.1～79.6kJ/m2, electrical conductivity is 1.0 × 10‑9～the composite of 13.3S/m or goods.The inventive method can utilize formed Stereocomplex crystal to be fixed on boundary by carbon nano-particles, not only it is effectively improved composite or the boundary strength of goods, toughening efficiency and electric conductivity, also speed up the crystallization of Poly-L-lactic acid matrix, improve the thermostability of goods.
Description
Technical field
The invention belongs to polymer composite and preparing technical field thereof, be specifically related to the poly-of the resistance to thermal conducting of a kind of ultra-toughness
Lactic acid/elastomer/carbon nano-particles composite or goods and preparation method thereof.
Background technology
Since 20th century, macromolecular material is with its light weight, the excellent specific property such as inexpensive, pliability is good, each in national economy
The various aspects of department and people's life are all widely applied, but the macromolecular material with fossil resources as synthesis material
Also two big serious problems are brought: limited petroleum resources are consumed and a large amount of difficult by a large amount of while being mass produced and consuming
With the polymeric scrap material of degraded, environment is caused severe contamination.Therefore, with Renewable resource as raw material, biodegradable
Macromolecular material be developed into research in recent years and application development focus.
Polylactic acid (PLA) is a kind of bio-based, biodegradable Green Polymer, can be with plant resourceses such as Semen Maydiss for closing
Become raw material to prepare, there is the advantages such as good biocompatibility, mechanical strength is high, the transparency is excellent, easily processed into type, be described as this
A kind of biodegradable polymer that century is most with prospects.But, the fragility of PLA is very big, and its tension failure extends
Rate only has about 5%, and notch impact strength is only 2kJ/m2；Additionally, as a kind of crystalline polymer, the crystallization rate of PLA is non-
The slowest, use the goods that the normal melt processing methods such as injection moulding prepare often in amorphous state, cause the thermostability of goods to be subject to
Being formed on its low glass transition temperature (55-60 DEG C), thermostability is very poor, heat distortion temperature generally only about 50-55 DEG C.This
A little shortcomings significantly limit PLA and substitute conventional petroleum based high molecular material in automobile work as general-purpose plastics and engineering plastics
The extensive application that toughness and heat resistant requirements high field are closed by industry, electronic apparatus etc..
It is a kind of simple, the economic method improving PLA toughness with elastomer (or flexible polymeric) physical blending.So
And, owing to PLA is the most very poor with the thermodynamic compatibility of most elastomers, during composition blend, its interfacial interaction is very
It is weak, so that the toughening effect of PLA matrix is not in full use by elastomer.Such as at polycaprolactone (PCL) toughness reinforcing PLA
System in, owing to the interfacial interaction of PLA with PCL is the most weak, even if the addition of PCL reaches 20wt% and is also only capable of making PLA
Notch impact strength from 2.2kJ/m2Rise to 5.2kJ/m2(ACS Appl.Mater.Interfaces, 2012,4,897-
905).Therefore, the interfacial interaction power improving PLA and elastomer is to improve the key of toughening efficiency.Document is had to report, poly-
Compound blend introduces carbon nano-particles and can prepare high performance polymer composite material.Because the CNT introduced, graphite
The carbon nano-particles such as alkene are selectively dispersible on the boundary of blend and through two-phase interface, make the phase of blend
Boundary strength is significantly improved (Polymer, 2013,54,464-471), and then obtains excellent toughness reinforcing or reinforced effects.Example
As, the modified carbon nano-tube introducing 2.0wt% in polypropylene/ethylene-acetate ethylene copolymer (PP/EVA) just can make PP/
The notch impact strength of EVA blend is by 10.2kJ/m originally2Bring up to 63.2kJ/m2(Polymer, 2009,50,3072-
3078).But, unfortunately, due to thermodynamic one, unmodified carbon nano-particles is very unstable to be distributed in blend
At boundary, it is during melt blending, is more likely to move to interact therewith another higher phase, the most still from a phase
So can optionally be dispersed in a certain phase of blend.Although, it has been found that by carbon nano-particles is carried out chemistry or thing
Reason modification can realize its Stable distritation on blend boundary (Polymer, 2013,54,6165-6176；
Biomacromolecules, 2009,10,417-424).But, carbon nano-particles is modified does not only results in process loaded down with trivial details
Complexity, can be inevitably to carbon nano-particles also as use strong oxidizer to introduce the process of active function groups when modification
Many defects are caused on surface, thus cause the deterioration of its mechanics, electric conductivity.On the other hand, elastomer and carbon is directly used to receive
The toughness reinforcing PLA of rice corpuscles is because cannot be effectively improved the crystalline rate of PLA simultaneously so that in machine-shaping goods, PLA matrix is still in non-
Crystalline state, the thermostability of goods is the most very poor.Therefore, how to seek an effective way, to realize elastomer and carbon nanoparticle
While the efficient toughness reinforcing PLA of son, significantly accelerate the crystalline rate of PLA matrix, it is thus achieved that have ultra-toughness concurrently, PLA heat-resisting, conduction is combined
Material or goods have become a problem urgently to be resolved hurrily.
Summary of the invention
The problem that it is an object of the invention to exist for prior art, first provides the poly-breast of the resistance to thermal conducting of a kind of ultra-toughness
Acid/elastomer/carbon nano-particles composite or the preparation method of goods.
It is a further object of the present invention to provide the polylactic acid/elastomer of the resistance to thermal conducting of ultra-toughness prepared by a kind of said method/
Carbon nano-particles composite or goods.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness that the present invention provides or the system of goods
Preparation Method, it is characterised in that the method is first Poly-L-lactic acid and carbon nano-particles to be carried out melting mixing to obtain left-handed poly-breast
The pre-composition of acid/carbon nano-particles, the most again by gained pre-composition and the elastomer melt blending containing dextrorotation polylactic acid chain segment,
During melt blending, Poly-L-lactic acid substrate molecule chain can be blended with the dextrorotation polylactic acid molecule chain in elastic dispersed phase
Forming Stereocomplex crystal by Stereocomplex on thing boundary, this Stereocomplex crystal may act as the agent for capturing of carbon nano-particles
To be fixed on boundary at the carbon nano-particles of two alternate migrations, solve unmodified carbon nano-particles and be difficult to be blended incompatible
The problem of the Stable distritation at thing boundary, and then realize synchronizing improving blend boundary intensity and composite or goods
The purpose of electrical conductivity；This Stereocomplex crystal is alternatively arranged as the efficient nucleation agent of Poly-L-lactic acid matrix crystallization simultaneously, improves base
The degree of crystallinity of body, final acquisition has polylactic acid/elastomer/carbon nano-particles composite or the system of the heat-resisting conductive characteristic of ultra-toughness concurrently
Product.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness that the present invention provides or the system of goods
Preparation Method, it is characterised in that the concrete technology step of the method and condition are as follows:
1) by uniform to 0.1～10.0 part of carbon nano-particles and 99.9～90.0 parts of Poly-L-lactic acid premixs, it is then added to
In melt mixer, at temperature 170～210 DEG C, melt blending 3～10min, obtains the pre-of Poly-L-lactic acid/carbon nano-particles
Mixed thing；
2) by pre-to 5～50 parts of elastomers containing dextrorotation polylactic acid chain segment and 95～50 parts of Poly-L-lactic acid/carbon nano-particles
Mixed thing premix uniformly after join in melt mixer, pelletize or again after melt blending 3～10min at temperature 170～210 DEG C
Machine-shaping, can be prepared by polylactic acid/elastomer/carbon nano-particles composite or the goods of the resistance to thermal conducting of ultra-toughness.
In above method, the number of each material is weight portion.
In above method, the elastomer containing dextrorotation polylactic acid chain segment used includes grafting or the block copolymerization of dextrorotation polylactic acid
Thing, the most poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers, poly-(ethylene-octene-methyl-prop
Olefin(e) acid ethylene oxidic ester)-dextrorotation polylactic acid graft polymers, Poly-L-lactic acid-Polyethylene Glycol-dextrorotation polylactic-acid block copolymer
Or any one in Poly-L-lactic acid-polycaprolactone-dextrorotation polylactic-acid block copolymer.
In above method, weight average molecular weight >=5 × 10 of Poly-L-lactic acid matrix used4g·mol-1, optical purity >=
95%.
In above method, the preferred CNT of carbon nano-particles used or Graphene.
In above method, the addition of carbon nano-particles used preferably 0.5～8.0 part.
In above method, the addition of the elastomer containing dextrorotation polylactic acid chain segment used preferably 15～40 parts.
Polylactic acid/elastomer/the carbon nano-particles of the resistance to thermal conducting of ultra-toughness prepared by the said method that the present invention provides is combined
Material or goods, it is characterised in that in this composite or goods, the content of carbon nano-particles is 0.1～5.0wt%, containing dextrorotation
The content of the elastomer of polylactic acid chain segment is 5～50wt%, shows polylactic acid stereoscopic and be combined on Wide angle X-ray diffraction collection of illustrative plates
(SC) characteristic diffraction peak of crystal, is dispersed in boundary by carbon nano-particles seen from transmission electron microscope observation and runs through
In two-phase interface, and the matrix degree of crystallinity of this composite or goods is 45.2～48.7%, and heat resisting temperature is 97.8～145.4
DEG C, notch impact strength is 12.1～79.6kJ/m2, electrical conductivity is 1.0 × 10-9～13.3S/m.
When the content of carbon nano-particles preferably 0.5～5.0wt% in above-mentioned composite or goods, containing dextrorotation polylactic acid chain
During content preferably 15～40wt% of elastomer of section, the matrix degree of crystallinity of this composite or goods is 46.5～48.7%,
Heat resisting temperature is 97.8～139.6 DEG C, and notch impact strength is 34.1～79.6kJ/m2, electrical conductivity is 5.2 × 10-5~
13.3S/m。
The present invention compared with prior art, has the advantage that
1, the preparation method provided due to the present invention is the characteristic utilizing polylactic acid to have chiral molecule, first by left-handed poly-breast
Acid and carbon nano-particles carry out melting mixing and obtain the pre-composition of Poly-L-lactic acid/carbon nano-particles, are premixed by gained the most again
Thing and the elastomer melt blending containing dextrorotation polylactic acid chain segment, utilize the dextrorotation polylactic acid molecule chain in elastomer and left-handed poly-breast
Carbon in pre-composition is received by the Stereocomplex crystal that acidic group body strand is formed by Stereocomplex in polymer blend interface district
Rice corpuscles is fixed on boundary, thus can realize it at blend without carbon nano-particles carries out physically or chemically modification
Stable distritation at boundary thus realize improving toughening efficiency and giving the dual purpose of lactic acid composite material electric conductivity, with
Time it also avoid prior art to the carbon nano-particles series of problems that brought of modification.
2, the polylactic acid/elastomer/carbon nano-particles composite of the resistance to thermal conducting of ultra-toughness provided due to the present invention or system
Product not only can make the dextrorotation polylactic acid molecule chain in elastomer can divide with Poly-L-lactic acid matrix during melting mixing
Subchain forms Stereocomplex (SC) crystal at interface In-situ reaction, and this SC crystal may act as the agent for capturing general of carbon nano-particles
The part carbon nano-particles migrated between the two phases is fixed on the boundary of blend, and the interface being effectively improved blend is strong
Degree and composite or the electric conductivity of goods, simultaneously because the fusing point of this SC crystal is higher than melting mixing and machine-shaping temperature, its
The crystallization of Poly-L-lactic acid matrix can also be accelerated as efficient nucleation agent in melt cooling process, improve material or goods knot
Crystalline substance degree, improves the thermostability of goods, thus for having ultra-toughness, heat-resisting, the polylactic acid/bullet of conduction concurrently by the preparation of melt-processed technique
Gonosome/carbon nano-particles composite or goods provide possibility, are expected to widen greatly the range of application of poly-lactic acid material.
3, the preparation method provided due to the present invention has efficiently one-tenth at the SC crystal that preparation process situ is compounded to form
Core effect, thus not only can prepare high heat proof material or goods, and can significantly shorten the machine-shaping cycle, reduce and produce into
This.
4, preparation method technique provided by the present invention is simply efficient, be prone to industrialized production.
Accompanying drawing explanation
Fig. 1 is the embodiment of the present invention 1～6 and comparative example 1～2 gained polylactic acid/elastomer/carbon nano-particles composite wood
Material or Wide angle X-ray diffraction (WAXD) collection of illustrative plates of goods median surface crystallization.Being combined prepared by the inventive method as seen from the figure
Material or goods occur in that the characteristic diffraction peak of compound (SC) crystal of polylactic acid stereoscopic at 12.0 °, 20.9 ° and 24.0 °, say
Bright during melting mixing, dextrorotation polylactic acid (PDLA) strand in elastomer and Poly-L-lactic acid (PLLA) substrate molecule
Chain defines SC crystal by Stereocomplex at the boundary of blend；And there is not this on the WAXD collection of illustrative plates of comparative example 1～2
Characteristic diffraction peak, illustrates do not have SC crystal raw in the elastomer-filled PLLA composite do not contain dextrorotation polylactic acid chain segment
Become.
Fig. 2 is the embodiment of the present invention 1 and 2 and comparative example 1 and 2 gained composite or the goods half hitch when isothermal crystal
Brilliant time-temperature curve.From the lactic acid composite material prepared by the inventive method seen from this curve, there is matrix knot quickly
Brilliant speed.
Fig. 3 is the transmission electron microscope figure of the intermingling material obtained by the embodiment of the present invention 2 and comparative example 2 or goods.
The embodiment of the present invention 2 is because of in PLLA matrix and Poly-L-lactic acid-Polyethylene Glycol-dextrorotation polylactic acid block copolymerization as can be seen from FIG.
SC crystal has been constructed in the interface of thing, and this SC crystal finally promotes unmodified CNT be dispersed at boundary and run through
In two-phase interface, and the CNT of comparative example 2 be all dispersed in elastomer mutually in.This explanation interface SC crystal may act as not
The carbon nano-particles migrated between the two phases is fixed on the boundary of blend by the agent for capturing of modified carbon nano tube particle, thus
Significantly improve lactic acid composite material or the impact flexibility of goods and electric conductivity.
Detailed description of the invention
Embodiment be given below so that the present invention to be specifically described, but be necessary it is pointed out here that be following example
Being only used for being further described the present invention, it is impossible to be interpreted as limiting the scope of the invention, the technology in this field is ripe
Some nonessential improvement and adjustment that the present invention is made by white silk personnel according to present invention still belong to protection scope of the present invention.
It addition, what deserves to be explained is: following example and comparative example resulting materials or the notch impact strength of goods, crystallization
Degree, electrical conductivity and thermostability parameter are to use the punching of VJ-40 type (Chengde Jinjian Testing Instrument Co., Ltd.) cantilever beam respectively
Hit testing machine, U.S. Perkin-Elmer pyris-1 differential scanning calorimeter (DSC), Keithley 6487 pico-ampere table and
The test of Q800 type dynamic thermomechanical analysis apparatus (TA company of the U.S.) test instrunment, its result see table.
Embodiment 1
1) it is 5 × 10 by 1.4 parts of Graphenes and 98.6 parts of weight average molecular weight4g·mol-1, optical purity be the PLLA of 98%
Matrix premix uniformly, is then added in melt mixer, melt blending 3min at temperature 170 DEG C, obtains PLLA/ Graphene
Pre-composition；
2) by 30 parts of poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers and 70 parts of PLLA/
Join in melt mixer after Graphene pre-composition mix homogeneously, pelletize after melt blending 10min at temperature 190 DEG C, system
For obtaining PLLA/ poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers/graphene composite material.
Embodiment 2
1) it is 1.1 × 10 by 2.5 parts of CNTs and 97.5 parts of weight average molecular weight5g·mol-1, optical purity be 95%
PLLA matrix premix uniformly, is then added in melt mixer, melt blending 5min at temperature 180 DEG C, obtains PLLA/ carbon
Nanotube pre-composition；
2) by pre-to 20 parts of Poly-L-lactic acid-Polyethylene Glycol-dextrorotation polylactic-acid block copolymers and 80 parts of PLLA/ CNTs
Joining in melt mixer after mixed thing mix homogeneously, at temperature 210 DEG C, pelletize after melt blending 7min, prepares
PLLA/ Poly-L-lactic acid-Polyethylene Glycol-dextrorotation polylactic-acid block copolymer/carbon nano tube compound material, utilizes micro-injection moulding
Machine, continues at 210 DEG C, composite processing is become goods.
Embodiment 3
1) it is 1.5 × 10 by 4.7 parts of CNTs and 95.3 parts of weight average molecular weight5g·mol-1, optical purity be 98.5%
PLLA matrix premix uniformly, be then added in melt mixer, melt blending 7min at temperature 190 DEG C, obtain PLLA/
CNT pre-composition；
2) by 15 parts of poly-(ethylene-octene-glycidyl methacrylate)-dextrorotation polylactic acid graft polymers and 85 parts
Join in melt mixer after PLLA/ CNT pre-composition mix homogeneously, make after melt blending 5min at temperature 200 DEG C
Grain, prepares PLLA/ poly-(ethylene-octene-glycidyl methacrylate)-dextrorotation polylactic acid graft polymers/carbon and receives
Mitron composite.
Embodiment 4
1) it is 2.1 × 10 by 1.0 parts of CNTs and 99.0 parts of weight average molecular weight5g·mol-1, optical purity be 98.5%
PLLA matrix premix uniformly, be then added in melt mixer, melt blending 10min at temperature 200 DEG C, obtain
PLLA/ CNT pre-composition；
2) by 50 parts of poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers and 50 parts of PLLA/
Join in melt mixer after CNT pre-composition mix homogeneously, pelletize after melt blending 3min at temperature 190 DEG C, system
For obtaining PLLA/ poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers/carbon nanotube composite
Material, utilizes miniature injection machine, continues at 170 DEG C, composite processing is become goods.
Embodiment 5
1) it is 2.1 × 10 by 8.3 parts of CNTs and 91.7 parts of weight average molecular weight5g·mol-1, optical purity be 98.5%
PLLA matrix premix uniformly, be then added in melt mixer, melt blending 5min at temperature 210 DEG C, obtain PLLA/
CNT pre-composition；
2) by 40 parts of poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers and 60 parts of PLLA/
Join in melt mixer after CNT pre-composition mix homogeneously, pelletize after melt blending 7min at temperature 180 DEG C, system
For obtaining PLLA/ poly-(ethylene-methyl methacrylate ethylene oxidic ester)-dextrorotation polylactic acid graft polymers/carbon nanotube composite
Material.
Embodiment 6
1) it is 2.1 × 10 by 0.1 part of Graphene and 99.9 parts of weight average molecular weight5g·mol-1, optical purity be 98.5%
PLLA matrix premix uniformly, is then added in melt mixer, melt blending 5min at temperature 190 DEG C, obtains PLLA/ stone
Ink alkene pre-composition；
2) by 5 parts of Poly-L-lactic acid-polycaprolactone-dextrorotation polylactic-acid block copolymers and 95 parts of PLLA/ Graphene premixs
Joining after thing mix homogeneously in melt mixer, at temperature 170 DEG C, pelletize after melt blending 5min, prepares PLLA/
Poly-L-lactic acid-polycaprolactone-dextrorotation polylactic-acid block copolymer/graphene composite material, utilizes miniature injection machine, continues
At 190 DEG C, composite processing is become goods.
Comparative example 1
1) it is 5 × 10 by 1.4 parts of Graphenes and 98.6 parts of weight average molecular weight4g·mol-1, optical purity be the PLLA of 98%
Matrix premix uniformly, is then added in melt mixer, melt blending 3min at temperature 170 DEG C, obtains PLLA/ Graphene
Pre-composition；
2) by 30 parts of poly-(ethylene-methyl methacrylate ethylene oxidic ester)-Poly-L-lactic acid graft polymers and 70 parts of PLLA/
Join in melt mixer after Graphene pre-composition mix homogeneously, pelletize after melt blending 10min at temperature 190 DEG C, system
For obtaining PLLA/ poly-(ethylene-methyl methacrylate ethylene oxidic ester)-Poly-L-lactic acid graft polymers/graphene composite material.
Comparative example 2
1) it is 1.1 × 10 by 2.5 parts of CNTs and 97.5 parts of weight average molecular weight5g·mol-1, optical purity be 95%
PLLA matrix premix uniformly, is then added in melt mixer, melt blending 5min at temperature 180 DEG C, obtains PLLA/ carbon
Nanotube pre-composition；
2) by pre-to 20 parts of Poly-L-lactic acid-Polyethylene Glycol-Poly-L-lactic acid block copolymers and 80 parts of PLLA/ CNTs
Joining in melt mixer after mixed thing mix homogeneously, at temperature 210 DEG C, pelletize after melt blending 7min, prepares
PLLA/ Poly-L-lactic acid-Polyethylene Glycol-Poly-L-lactic acid block copolymer/carbon nano tube compound material, utilizes micro-injection moulding
Machine, continues at 210 DEG C, composite processing is become goods.
In order to investigate gained polylactic acid/elastomer/carbon nano-particles composite or the correlated performance of goods, the present invention uses
Wide angle X-ray diffraction (WAXD) characterizes embodiment 1～6 and the crystal class of comparative example 1～2 gained composite material interface crystallization
Type, result is shown in Fig. 1；Have rated the embodiment of the present invention 1 and 2 with differential scanning calorimeter (DSC) to be combined with comparative example 1 and 2 gained
The matrix crystalline rate of material, result is shown in Fig. 2；Embodiment 2 and comparative example 2 gained is characterized with transmission electron microscope (TEM)
The selective distribution situation of carbon nano-particles in composite, result is shown in Fig. 3；To embodiment 1～6 and comparative example 1～2 gained material
Material or goods have carried out notch impact toughness, Determination of Crystallinity, conductance measurement and dynamic mechanical analysis (DMA) test,
Result see table.
Table
*: be that (storage modulus is continuous with the test rising of temperature at the DMA storage modulus-temperature curve of material or goods
Reduce) on, make storage modulus be decreased to temperature corresponding during 200Mpa.
As seen from the above table, due to the PDLA strand in elastomer by with PLLA substrate molecule chain at blend boundary
District's Stereocomplex forms SC crystal, thus not only can will be fixed on boundary at the carbon nano-particles of two alternate migrations, and then
Achieve synchronization and improve lactic acid composite material or the notch impact toughness of goods and the purpose of electrical conductivity, and can be by significantly
Improve the degree of crystallinity of matrix and significantly improve the thermostability of goods.
Claims (10)
1. polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness or a preparation method for goods, it is special
Levy and be that the method is first Poly-L-lactic acid and carbon nano-particles to be carried out melting mixing to obtain Poly-L-lactic acid/carbon nano-particles
Pre-composition, the most again by gained pre-composition and elastomer melt blending containing dextrorotation polylactic acid chain segment, in melt blending process
Middle Poly-L-lactic acid substrate molecule chain can lead on blend boundary with the dextrorotation polylactic acid molecule chain in elastic dispersed phase
Crossing Stereocomplex and form Stereocomplex crystal, this Stereocomplex crystal may act as the agent for capturing of carbon nano-particles and alternate will move two
The carbon nano-particles moved is fixed on boundary, solves unmodified carbon nano-particles and is difficult at incompatible blend boundary steady
The problem of fixed distribution, and then realize the purpose synchronizing to improve the electrical conductivity of blend boundary intensity and composite or goods；
This Stereocomplex crystal is alternatively arranged as the efficient nucleation agent of Poly-L-lactic acid matrix crystallization simultaneously, improves the degree of crystallinity of matrix,
Obtain polylactic acid/elastomer/carbon nano-particles composite or the goods having the heat-resisting conductive characteristic of ultra-toughness concurrently eventually.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 1 or goods
Preparation method, it is characterised in that the concrete technology step of the method and condition are as follows:
1) by uniform to 0.1～10.0 part of carbon nano-particles and 99.9～90.0 parts of Poly-L-lactic acid premixs, it is then added to melt
In blender, at temperature 170～210 DEG C, melt blending 3～10min, obtains the premix of Poly-L-lactic acid/carbon nano-particles
Thing；
2) by 5～50 parts of elastomers containing dextrorotation polylactic acid chain segment and 95～50 parts of Poly-L-lactic acid/carbon nano-particles pre-compositions
Join after mix homogeneously in melt mixer, pelletize or reprocessing after melt blending 3～10min at temperature 170～210 DEG C
Molding, can be prepared by polylactic acid/elastomer/carbon nano-particles composite or the goods of the resistance to thermal conducting of ultra-toughness,
The number of the most each material is weight portion.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 1 and 2 or
The preparation method of goods, it is characterised in that in the method, the elastomer containing dextrorotation polylactic acid chain segment used is connecing of dextrorotation polylactic acid
Branch or block copolymer.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 1 and 2 or
The preparation method of goods, it is characterised in that in the method, carbon nano-particles used is CNT or Graphene.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 3 or goods
Preparation method, it is characterised in that in the method, carbon nano-particles used is CNT or Graphene.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 2 or goods
Preparation method, it is characterised in that in the method, the addition of the elastomer containing dextrorotation polylactic acid chain segment used is 15～40 parts；
Carbon nano-particles addition is 0.5～8.0 part.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 3 or goods
Preparation method, it is characterised in that in the method, the addition of the elastomer containing dextrorotation polylactic acid chain segment used is 15～40 parts；
Carbon nano-particles addition is 0.5～8.0 part.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 5 or goods
Preparation method, it is characterised in that in the method, the addition of the elastomer containing dextrorotation polylactic acid chain segment used is 15～40 parts；
Carbon nano-particles addition is 0.5～8.0 part.
9. polylactic acid/elastomer/the carbon nano-particles of the resistance to thermal conducting of the ultra-toughness prepared by method described in claim 1 or 2
Composite or goods, it is characterised in that in this composite or goods, carbon nano-particles content is 0.1～5.0wt%, containing the right side
The content of the elastomer of rotation polylactic acid chain segment is 5～50wt%, shows polylactic acid stereoscopic multiple on Wide angle X-ray diffraction collection of illustrative plates
Close the characteristic diffraction peak of (SC) crystal, carbon nano-particles seen from transmission electron microscope observation be dispersed in boundary and pass through
Be through at two-phase interface, and the matrix degree of crystallinity of this composite or goods be 45.2～48.7%, heat resisting temperature be 97.8～
145.4 DEG C, notch impact strength is 12.1～79.6kJ/m2, electrical conductivity is 1.0 × 10-9～13.3S/m.
Polylactic acid/elastomer/carbon nano-particles the composite of the resistance to thermal conducting of ultra-toughness the most according to claim 9 or system
Product, it is characterised in that in this composite or goods, carbon nano-particles content is 0.5～5.0wt%, containing dextrorotation polylactic acid chain segment
The content of elastomer be 15～40wt%, the matrix degree of crystallinity of this composite or goods is 46.5～48.7%, heat-resisting temperature
Degree is 97.8～139.6 DEG C, and notch impact strength is 34.1～79.6kJ/m2, electrical conductivity is 5.2 × 10-5～13.3S/m.
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