CN106243650B - A kind of ageing-resistant polylactic acid wood plastic composite - Google Patents
A kind of ageing-resistant polylactic acid wood plastic composite Download PDFInfo
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- CN106243650B CN106243650B CN201610610778.3A CN201610610778A CN106243650B CN 106243650 B CN106243650 B CN 106243650B CN 201610610778 A CN201610610778 A CN 201610610778A CN 106243650 B CN106243650 B CN 106243650B
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Polymers & Plastics (AREA)
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Abstract
The invention discloses a kind of preparation methods of ageing-resistant polylactic acid wood plastic composite：（1）The preparation of plant fiber：Cocoanut fiber, sugarcane bagasse are taken, pine powder is uniformly mixed；(2) plant fiber enzyme modification：By mixed plant fiber according to weight ratio 1:Processing is modified in 30 ratio input enzyme solutions；It is modified, with clear water rinsed clean, 60 DEG C of drying；（3）Raw material is blended：The raw material for being configured dried according to following parts by weight：38 56 parts of modified plant fibers, 100 120 parts of polylactic acid, 0.8 part of nano-calcium carbonate；After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, after mixing, add other all raw materials, adjustment rotating speed is 30r/min, and then 5 6min are blended in stirring, and raw material is made to be sufficiently mixed uniformly；（4）Precompressed；（5）It is hot-forming.
Description
Technical field
The present invention relates to a kind of ageing-resistant polylactic acid wood plastic composites, belong to wood moulding manufacture field.
Background technology
The nearly more than ten years, Wood Plastics Composite Product gradually moves towards market, but some Wood-plastic material performances are still undesirable, such as rushes
Hit intensity, bending modulus are relatively low.Improving wood powder content can cause wood plastic composite impact property drastically to decline, as loading surpasses
When 40%, impact property reduces by more than 50%;In addition wood powder content raising exacerbates the inflammability of wood moulding, and good anti-flammability
It can be one of important performance of construction material.Therefore, it is that raising wood plastic composite is extensive to improve mechanical property and flame retardant property
The key of application.
Wood plastic composite（WPC）It is the organic combination of plant fiber and plastics, has taken into account plant fiber and plastics
The excellent performance of double grading, existing timber and plastics, while some shortcomings of timber and plastics inherently are overcome again.Though
Right WPC have the advantages that it is more, but it also there are two types of material respectively the shortcomings that：If degradation with aging easily occurs for plastic material,
Wood-fibred easily occurs rotten etc..Many WPC products are all for outdoor at present, thus the aging to WPC and antiseptic property
Research has a very important significance.
Compared to traditional wood plastic composite, polylactic acid（PLA）Wood plastic composite is due to its good biodegradability
And there is better application value.
The present invention is intended to provide a kind of ageing-resistant polylactic acid wood plastic composite, existing good biodegradability,
There is good ageing-resistant performance again.
Invention content
The present invention is directed to the shortcomings that polylactic acid wood plastic material of the prior art, provides a kind of ageing-resistant polylactic acid wood moulding and answers
Condensation material, existing good biodegradability, and with good ageing-resistant performance.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 20-30 parts of cocoanut fiber, 5-9 parts of sugarcane bagasse are taken, 8-12 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.3-0.5 parts of lignin peroxidase, 0.5-1 parts of laccase, polyphenol oxidase are taken
0.3 part, 100 parts of water is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 30-40min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：38-56 parts of modified plant fibers, polylactic acid 100-120
Part, 0.8 part of nano-calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 5-6min, makes raw material be sufficiently mixed
It is even；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.
The invention has the beneficial effects that：
The present invention provides a kind of ageing-resistant polylactic acid wood plastic composites, and raw material is natural, and existing good biology can
Degradability, and with good ageing-resistant performance.
Specific embodiment
Embodiment 1：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 20 parts of cocoanut fiber, 9 parts of sugarcane bagasse are taken, 8 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.5 part of lignin peroxidase, 0.5 part of laccase, 0.3 part of polyphenol oxidase, water are taken
100 parts, it is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 40min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：38 parts of modified plant fibers, 120 parts of polylactic acid, nanometer
0.8 part of calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 5min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.It is made
Size is the composite board of 180mm × 100mm × 1mm, and forming temperature is 185 DEG C, pressure 12MPa.
Ageing-resistant performance：Ultraviolet ageing is according to standard ASTM G154-06, and 3000 hours color keeps of aging are constant, always
Change 1800 hours crystallinity to remain unchanged.
Embodiment 2：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 30 parts of cocoanut fiber, 5 parts of sugarcane bagasse are taken, 12 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.3 part of lignin peroxidase, 1 part of laccase, 0.3 part of polyphenol oxidase, water are taken
100 parts, it is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 30min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：56 parts of modified plant fibers, 100 parts of polylactic acid, nanometer
0.8 part of calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 6min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.It is made
Size is the composite board of 180mm × 100mm × 1mm, and forming temperature is 185 DEG C, pressure 12MPa.
Ageing-resistant performance：Ultraviolet ageing is according to standard ASTM G154-06, and 2000 hours color keeps of aging are constant, always
Change 2600 hours crystallinity to remain unchanged.
Embodiment 3：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 21 parts of cocoanut fiber, 8 parts of sugarcane bagasse are taken, 9 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.4 part of lignin peroxidase, 0.6 part of laccase, 0.3 part of polyphenol oxidase, water are taken
100 parts, it is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 39min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：40 parts of modified plant fibers, 110 parts of polylactic acid, nanometer
0.8 part of calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 5min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.It is made
Size is the composite board of 180mm × 100mm × 1mm, and forming temperature is 185 DEG C, pressure 12MPa.
Ageing-resistant performance：Ultraviolet ageing is according to standard ASTM G154-06, and 2014 hours color keeps of aging are constant, always
Change 2000 hours crystallinity to remain unchanged.
Embodiment 4：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 29 parts of cocoanut fiber, 6 parts of sugarcane bagasse are taken, 11 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.3 part of lignin peroxidase, 0.9 part of laccase, 0.3 part of polyphenol oxidase, water are taken
100 parts, it is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 31min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：55 parts of modified plant fibers, 105 parts of polylactic acid, nanometer
0.8 part of calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 6min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.It is made
Size is the composite board of 180mm × 100mm × 1mm, and forming temperature is 185 DEG C, pressure 12MPa.
Ageing-resistant performance：Ultraviolet ageing is according to standard ASTM G154-06, and 2756 hours color keeps of aging are constant, always
Change 1900 hours crystallinity to remain unchanged.
Embodiment 5：
A kind of ageing-resistant polylactic acid wood plastic composite, is prepared via a method which to obtain：
（1）The preparation of plant fiber：
According to following parts by weight, 25 parts of cocoanut fiber, 7 parts of sugarcane bagasse are taken, 10 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.5 part of lignin peroxidase, 0.7 part of laccase, 0.3 part of polyphenol oxidase, water are taken
100 parts, it is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept,
Then heat to 38 DEG C of processing 35min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：48 parts of modified plant fibers, 115 parts of polylactic acid, nanometer
0.8 part of calcium carbonate；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, are uniformly mixed
Afterwards, other all raw materials are added, adjustment rotating speed is 30r/min, and then stirring blending 5min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove
Bubble in Composite Melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.It is made
Size is the composite board of 180mm × 100mm × 1mm, and forming temperature is 185 DEG C, pressure 12MPa.
Ageing-resistant performance：Ultraviolet ageing is according to standard ASTM G154-06, and 2344 hours color keeps of aging are constant, always
Change 2300 hours crystallinity to remain unchanged.
It can be seen that the present invention provides a kind of ageing-resistant polylactic acid wood plastic composite, raw material is natural, existing good
Biodegradability, and with good ageing-resistant performance, very with market potential.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of preparation method of ageing-resistant polylactic acid wood plastic composite, its step are as follows：
（1）The preparation of plant fiber：
According to following parts by weight, 20-30 parts of cocoanut fiber, 5-9 parts of sugarcane bagasse are taken, 8-12 parts of pine powder is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.3-0.5 parts of lignin peroxidase is taken, 0.5-1 parts of laccase, 0.3 part of polyphenol oxidase,
100 parts of water, is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 25 DEG C of processing 30min of constant temperature are kept, then
It is warming up to 38 DEG C of processing 30-40min, finally heated to 80 DEG C processing 50min；
It is modified, with clear water rinsed clean, 60 DEG C of drying；
（3）Raw material is blended：
The raw material for being configured dried according to following parts by weight：38-56 parts of modified plant fibers, 100-120 parts of polylactic acid, receive
0.8 part of calcium carbonate of rice；
After the polylactic acid pellet weighed is melted completely on a mill, modified plant fibers are uniformly added into, after mixing, then
Other all raw materials are added in, adjustment rotating speed is 30r/min, and then stirring blending 5-6min, makes raw material be sufficiently mixed uniformly；
（4）Precompressed：
Blend after mill is pressed into the sheet material of 8mm thickness in advance while hot, it is spare；
（5）It is hot-forming：
By above-mentioned precompressed blend on vulcanizing press preheated 10min, repeatedly pressure release pressurized deflation 3min, remove compound
Bubble in material melt, pressurize 10min postcoolings molding, is made ageing-resistant polylactic acid wood plastic composite.
2. the ageing-resistant polylactic acid wood plastic composite that preparation method described in claim 1 obtains.
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| CN109610034A (en) * | 2018-10-16 | 2019-04-12 | 山东金冠网具有限公司 | A kind of degradable blinding dust-suppression net and preparation method thereof |
| CN111138881A (en) * | 2019-12-28 | 2020-05-12 | 杨永根 | Novel wood board capable of effectively preventing deformation and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189489A1 (en) * | 2008-11-18 | 2010-05-26 | Kompetenzzentrum Holz GmbH | Lignocellulosic fiberboards made with tannin and phenol-oxidizing enzyme |
| CN101760037A (en) * | 2008-12-23 | 2010-06-30 | 金发科技股份有限公司 | Completely degraded plant powder modified thermoplastics composite material and preparation method thereof |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2189489A1 (en) * | 2008-11-18 | 2010-05-26 | Kompetenzzentrum Holz GmbH | Lignocellulosic fiberboards made with tannin and phenol-oxidizing enzyme |
| CN101760037A (en) * | 2008-12-23 | 2010-06-30 | 金发科技股份有限公司 | Completely degraded plant powder modified thermoplastics composite material and preparation method thereof |
| CN104963206A (en) * | 2014-12-11 | 2015-10-07 | 华东理工常熟研究院有限公司 | Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof |
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