CN108948689A - A kind of reactive extrursion method polydactyl acid-lignin composite material and preparation method - Google Patents
A kind of reactive extrursion method polydactyl acid-lignin composite material and preparation method Download PDFInfo
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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
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/02—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polycarbonates or saturated polyesters
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F289/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds not provided for in groups C08F251/00 - C08F287/00
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/08—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained otherwise than by reactions only involving unsaturated carbon-to-carbon bonds
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L97/00—Compositions of lignin-containing materials
- C08L97/005—Lignin
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Abstract
The present invention discloses a kind of reactive extrursion method polydactyl acid-lignin composite material and preparation method thereof, the composition of the composite material is calculated as with mass fraction: 100 parts of polylactic acid, 40-100 parts of lignin, 0.01-5 parts of initiator, 0.01-15 parts of reaction monomers, 0.1-1 parts of antioxidant.The preparation method of the composite material includes: to carry out ingredient first, in accordance with the composition of composite material, and above-mentioned composition is uniformly mixed in proportion, then blend is placed in consersion unit and is reacted, so that polylactic acid-lignin composite material be made.Compared with prior art, the present invention can effectively enhance polylactic acid-lignin composite material compatibility, assign the good performance of material, and reduce cost.
Description
Technical field
The invention belongs to polymeric material field more particularly to graft modifications, bio-based materials composite material preparation side
A kind of method, and in particular to reactive extrursion method polydactyl acid-lignin composite material and preparation method thereof.
Background technique
Polylactic acid (PLA) is a kind of important lactic acid derivative, is a kind of high molecular material using lactic acid as Material synthesis,
Nontoxic to have no irritating odor with good biodegradability, excellent biocompatibility, intensity is high, and plasticity is strong, thus
By the favor of high molecular material industry.The performance characteristics such as the difference but PLA enbrittles, easily bending deformation；In addition the change of PLA
It learns structure and lacks reactive functional groups, do not have hydrophily, it is therefore desirable to is further modified.The method of modifying of polylactic acid generally has
Chemical modification and physical modification.Chemical modification is the change for introducing various function side groups by approach such as graft crosslinkings to change PLA
Learn structure；Physical modification is mechanical performance, the hot property etc. for changing PLA by addition plasticizer, various inorganic organic materials etc..
Lignin is to pass through the highly cross-linked tridimensional network of carbon-carbon bond and ehter bond using phenyl-propane as structural unit
Natural aromatic compounds of group.Lignin is the by-product of paper-making industry at present, has good biological degradability, and PLA- lignin is multiple
Condensation material has degradable property, is the material of complete environmental protection, under the atmosphere that environmental protection is vigorously advocated in countries in the world, PLA- is wooden
Element is undoubtedly a kind of promising polymer composite.The rigidity that can increase PLA is added in PLA in lignin, by connecing
Branch is modified, and toughness can satisfy routine use condition.
At present, it has been reported that the method for PLA modified preparation process, to improve its comprehensive performance, such as Robertson
[Robertson M L.Toughening of polylactide with polymerized soybean oil[J]
.Macromolecules, 2010,43 (4): 1807-1814] soybean oil polymer first is made in the blendings such as soybean oil, crosslinking agent,
PLA and soybean oil polymer melting are blended again, obtain modified PLA, as the result is shown the flexibility and tensile strength of blend
It increases than pure material PLA, elongation at break highest may be up to 700%；Shang Jianjiang [Shang Jianjiang, Lv Xinming, Lv Xiao China oneself
Diamines grafted polylactic acid hydrophilic modifying studies [J] Shihezi Univ report (natural science edition) 2009,27 (6): 755-758] with cream
Acid, maleic anhydride and ethylenediamine are raw material, have synthesized the modified PLA of ethylenediamine, and optimum process condition has been determined: having reacted at 10 DEG C
2h, ethylenediamine it is excessive 20% when yield and product purity highest.
Summary of the invention
The purpose of the present invention is to overcome the defects in the prior art, provides a kind of modified PLA- lignin of reactive extrursion method
Composite material and preparation method, easy to operate, composite material combination property is good.
To achieve the above object, the present invention adopts the following technical scheme:
On the one hand, the present invention provides a kind of reactive extrursion method polydactyl acid-lignin composite material, according to the mass fraction
It calculates, the composition and content of the composite material are as follows:
In order to further optimize the above technical scheme, technical measures adopted by the present invention further include:
Preferably, the lignin is the aroma type containing oxo phenylpropanol or derivatives thereof structural unit in molecular structure
High polymer, partial size are 50-500 mesh.
Preferably, the initiator is peroxide type initiators；It is highly preferred that the initiator is peroxidating diisopropyl
Benzene, dual-tert-butyl cumene hydroperoxide, tert-butyl peroxide benzoate, two carbonic ester of tert-butyl peroxide, tert-butyl mistake
One or more of hydrogen oxide, 2,5- dimethyl -2,5- bis(t-butylperoxy) hexane, benzoyl peroxide.
Preferably, the reaction monomers be one of maleic anhydride, acrylic acid, glycidyl methacrylate or
It is several.
Preferably, the antioxidant is phenolic antioxidant, such as 1010 wait phenolic antioxidants.
On the other hand, the present invention also provides a kind of above-mentioned reactive extrursion method polydactyl acid-lignin composite materials
Preparation method comprising following steps:
Step (1) first in proportion weighs the lignin of 100 parts PLA, 40-100 part, is uniformly mixed under room temperature；
Initiator that parts by weight are 0.01-5 parts by step (2), reaction monomers that parts by weight are 0.01-15 parts, again
It measures the antioxidant that number is 0.1-1 parts to be uniformly mixed, by the mixture and step (1) resulting polylactic acid/lignin mixture
It is added in consersion unit, is blended under scheduled reaction temperature together, so that polylactic acid-lignin composite material be made.
Preferably, the consersion unit is at least one of mixer, response type extruder, and the reaction temperature is
150-190 DEG C, wherein the rotor speed of mixer is 50-200rpm, and the screw speed of response type extruder is 100-600rpm.
Compared with prior art, the present invention has the following advantages and beneficial effects:
(1) polylactic acid prepared by the present invention-lignin composite material comprehensive mechanical property is good；
(2) present invention is easy to operate compared with other preparation methods, and effect is good；
(3) present invention is organic by biodegradable papermaking byproduct-lignin and biodegradable plastics polylactic acid
Combine, produce the plastics of fully biodegradable, can not only make full use of papermaking byproduct lignin, but also can mention
The comprehensive mechanical property of high polylactic acid；
(4) present invention is not related to the use of solvent completely in polylactic acid-lignin composite material preparation process, used
All components do not need to be further processed, and directly carry out physical mixed by blender；
(5) present invention prepares polylactic acid-lignin composite material by mixer or extruder melt blending, and this method is complete
There is a possibility that industrialization large-scale production entirely.
Specific embodiment
With reference to embodiment, the specific embodiment of the present invention is further described.Following embodiment is only used for more
Add and clearly demonstrate technical solution of the present invention, and not intended to limit the protection scope of the present invention.
Embodiment 1
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
Above-mentioned formula is reacted according to the following steps:
Step (1) first in proportion weighs PLA and lignin, is uniformly mixed under room temperature；
Load weighted DCP, GMA, 1010 after mixing, are added to by step (2) together with PLA and lignin mixture
In response type extruder, extruder temperature is set as 150 DEG C, screw speed 400RPM, and PLA- lignin is made in extruding pelletization
Composite particles.
By above-mentioned composite particles through injection molding (injection temperature be 160-180 DEG C, injection pressure 40-80MPa,
Injection moulding speed is 50-150mm/s, dwell pressure 40-50MPa, dwell time 5S, and cooling time, 15S, was made standard testing sample
Item, it is spare.
Embodiment 2
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
Above-mentioned formula is reacted according to the following steps:
Step (1) first in proportion weighs PLA and lignin, is uniformly mixed under room temperature；
Load weighted DCP, GMA, 1010 after mixing, are added to by step (2) together with PLA and lignin mixture
In response type extruder, extruder temperature is set as 190 DEG C, screw speed 300RPM, and PLA- lignin is made in extruding pelletization
Composite particles.
Standard testing batten is made through injection molding (Shooting Technique is with embodiment 1) in above-mentioned composite particles, it is spare.
Embodiment 3
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
Above-mentioned formula is reacted according to the following steps:
Step (1) first in proportion weighs PLA and lignin, is uniformly mixed under room temperature；
Load weighted DCP, GMA, 1010 after mixing, are added to by step (2) together with PLA and lignin mixture
In response type extruder, extruder temperature is set as 160 DEG C, screw speed 100RPM, and PLA- lignin is made in extruding pelletization
Composite particles.
Standard testing batten is made through injection molding (Shooting Technique is with embodiment 1) in above-mentioned composite particles, it is spare.
Embodiment 4
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
Above-mentioned formula is reacted according to the following steps:
Step (1) first in proportion weighs PLA and lignin, is uniformly mixed under room temperature；
Load weighted DCP, GMA, 1010 after mixing, are added to by step (2) together with PLA and lignin mixture
In response type extruder, extruder temperature is set as 180 DEG C, screw speed 600RPM, and PLA- lignin is made in extruding pelletization
Composite particles.
Standard testing batten is made through injection molding (Shooting Technique is with embodiment 1) in above-mentioned composite particles, it is spare.
Embodiment 5
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
Above-mentioned formula is reacted according to the following steps:
Step (1) first in proportion weighs PLA and lignin, is uniformly mixed under room temperature；
Load weighted DCP, GMA, 1010 after mixing, are added to by step (2) together with PLA and lignin mixture
In response type extruder, extruder temperature is set as 170 DEG C, screw speed 300RPM, and PLA lignin is made in extruding pelletization
Composite particles.
Standard testing batten is made through injection molding (Shooting Technique is with embodiment 1) in above-mentioned composite particles, it is spare.
With unmodified polylactic acid and unmodified polylactic acid/lignin (being simply blended by polylactic acid and lignin)
For comparative example, using universal electrical tensile testing machine (KY800C is increased income the manufacture of experiment machinery plant by Jiangdu) and electron bombardment
To above-described embodiment 1-5, finally preparation-obtained sample stretches by force testing machine (production of Shandong An Nimaite Instrument Ltd.)
Degree, elongation at break, impact strength are measured, and the result is shown in shown in table 1:
Table 1
By result as can be seen that the modified PLA- lignin composite material performance of reactive extrursion method significantly improves.
Embodiment 6
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
The reaction step of above-mentioned formula and the preparation step of standard testing batten are same as Example 1.
Embodiment 7
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
The reaction step of above-mentioned formula and the preparation step of standard testing batten are same as Example 5.
Embodiment 8
A kind of preparation method of the modified PLA- lignin composite material of reactive extrursion method, is calculated, this is compound according to the mass fraction
The composition and content of material are as follows:
Wherein, lignin is that the aroma type height in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit is poly-
Object, partial size are 50-500 mesh.
The reaction step of above-mentioned formula and the preparation step of standard testing batten are same as Example 4.
The final preparation-obtained properties of sample of above-described embodiment 6~8 is superior to the prior art.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (9)
1. a kind of reactive extrursion method polydactyl acid-lignin composite material, which is characterized in that calculate according to the mass fraction, this is multiple
The composition and content of condensation material are as follows:
2. a kind of reactive extrursion method polydactyl acid-lignin composite material according to claim 1, which is characterized in that
The lignin is the aroma type high polymer in molecular structure containing oxo phenylpropanol or derivatives thereof structural unit, and partial size is
50-500 mesh.
3. a kind of reactive extrursion method polydactyl acid-lignin composite material according to claim 1, which is characterized in that
The initiator is peroxide type initiators.
4. a kind of reactive extrursion method polydactyl acid-lignin composite material according to claim 1, which is characterized in that
The initiator is cumyl peroxide, dual-tert-butyl cumene hydroperoxide, tert-butyl peroxide benzoate, peroxidating
Di-tert-butyidicarbonate, tert-butyl hydroperoxide, 2,5- dimethyl -2,5- bis(t-butylperoxy) hexane, benzoyl peroxide first
One or more of acyl.
5. a kind of reactive extrursion method polydactyl acid-lignin composite material according to claim 1, which is characterized in that
The reaction monomers are one of maleic anhydride, acrylic acid, glycidyl methacrylate or several.
6. a kind of reactive extrursion method polydactyl acid-lignin composite material according to claim 1, which is characterized in that
The antioxidant is phenolic antioxidant.
7. a kind of system of such as reactive extrursion method polydactyl acid-lignin composite material according to any one of claims 1 to 6
Preparation Method, which comprises the steps of:
Step (1) first in proportion weighs 100 parts of polylactic acid, 40-100 parts of lignin, is uniformly mixed under room temperature；
Initiator that parts by weight are 0.01-5 parts by step (2), the reaction monomers that parts by weight are 0.01-15 parts, parts by weight
Number is uniformly mixed for 0.1-1 parts of antioxidant, by the mixture together with the resulting polylactic acid of step (1)/lignin mixture
It is added in consersion unit, is blended under scheduled reaction temperature, so that polylactic acid-lignin composite material be made.
8. preparation method according to claim 7, which is characterized in that the consersion unit is mixer, response type extrusion
At least one of machine, wherein the rotor speed of the mixer is 50-200rpm, the screw speed of the response type extruder
For 100-600rpm.
9. preparation method according to claim 7, which is characterized in that the reaction temperature is 150-190 DEG C.
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Cited By (5)
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| CN110734631A (en) * | 2019-11-15 | 2020-01-31 | 湖南骏泰新材料科技有限责任公司 | lignin-based biodegradable polybutylene succinate film and preparation method thereof |
| CN110903626A (en) * | 2019-12-12 | 2020-03-24 | 湖南绿燊环保科技有限公司 | Polycarbonate composite material and preparation method thereof |
| CN110938291A (en) * | 2019-12-12 | 2020-03-31 | 湖南绿燊环保科技有限公司 | Polylactic acid composite material and preparation method thereof |
| CN114685961A (en) * | 2020-12-29 | 2022-07-01 | 中国石油化工股份有限公司 | Modified polylactic acid film material |
| CN114874446A (en) * | 2022-06-22 | 2022-08-09 | 南京塑净新材料科技有限公司 | Special efficient nucleating agent for lignin grafted polylactic acid and preparation method and application thereof |
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| CN110734631A (en) * | 2019-11-15 | 2020-01-31 | 湖南骏泰新材料科技有限责任公司 | lignin-based biodegradable polybutylene succinate film and preparation method thereof |
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| CN114874446A (en) * | 2022-06-22 | 2022-08-09 | 南京塑净新材料科技有限公司 | Special efficient nucleating agent for lignin grafted polylactic acid and preparation method and application thereof |
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