CN106147173B - A kind of high-toughness polylactic acid wood plastic composite - Google Patents
A kind of high-toughness polylactic acid wood plastic composite Download PDFInfo
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- CN106147173B CN106147173B CN201610611482.3A CN201610611482A CN106147173B CN 106147173 B CN106147173 B CN 106147173B CN 201610611482 A CN201610611482 A CN 201610611482A CN 106147173 B CN106147173 B CN 106147173B
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- 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
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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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- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/14—Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
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Abstract
The invention discloses a kind of preparation methods of high-toughness polylactic acid wood plastic composite：（1）The preparation of plant fiber：Take cocoanut fiber, sugarcane bagasse, Manchurian ash wood powder, powdered rice hulls are uniformly mixed；(2) plant fiber enzyme modification：Mixed plant fiber is subjected to enzyme modification；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：42 60 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 high-toughness 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 high-toughness polylactic acid wood plastic composite, existing good biodegradability,
There is good mechanical property 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 high-toughness polylactic acid wood moulding and answers
Condensation material, existing good biodegradability, and with good mechanical property.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of high-toughness 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, 50-60 parts of cocoanut fiber, 3-6 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, powdered rice hulls 3 are taken
Part is uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.6-0.9 parts of lignin peroxidase, 0.5-1 parts of laccase, 1,4 beta-glucanase are taken
0.5 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, 38 DEG C of processing 40- of constant temperature are kept
60min, 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：42-60 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 high-toughness polylactic acid wood plastic composites, and raw material is natural, and existing good biology can
Degradability, and with good mechanical property.
Specific embodiment
Embodiment 1：
A kind of high-toughness 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, 50 parts of cocoanut fiber is taken, 6 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, 3 parts of powdered rice hulls are mixed
It closes uniform；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.6 part of lignin peroxidase, 1 part of laccase, 0.5 part of 1,4 beta-glucanase, 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, 38 DEG C of processing 40min of constant temperature are kept,
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：60 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.
Embodiment 2：
A kind of high-toughness 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, 60 parts of cocoanut fiber is taken, 3 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, 3 parts of powdered rice hulls are mixed
It closes uniform；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.9 part of lignin peroxidase, 0.5 part of laccase, 0.5 part of 1,4 beta-glucanase, 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, 38 DEG C of processing 60min of constant temperature are kept,
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：42 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.
Embodiment 3：
A kind of high-toughness 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, 51 parts of cocoanut fiber is taken, 5 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, 3 parts of powdered rice hulls are mixed
It closes uniform；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.7 part of lignin peroxidase, 0.9 part of laccase, 0.5 part of 1,4 beta-glucanase, 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, 38 DEG C of processing 50min of constant temperature are kept,
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：59 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 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.
Embodiment 4：
A kind of high-toughness 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, 59 parts of cocoanut fiber is taken, 4 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, 3 parts of powdered rice hulls are mixed
It closes uniform；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.8 part of lignin peroxidase, 0.6 part of laccase, 0.5 part of 1,4 beta-glucanase, 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, 38 DEG C of processing 41min of constant temperature are kept,
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：43 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 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.
Embodiment 5：
A kind of high-toughness 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, 55 parts of cocoanut fiber is taken, 6 parts of sugarcane bagasse, 10 parts of Manchurian ash wood powder, 3 parts of powdered rice hulls are mixed
It closes uniform；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.6 part of lignin peroxidase, 0.8 part of laccase, 0.5 part of 1,4 beta-glucanase, 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, 38 DEG C of processing 59min of constant temperature are kept,
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：50 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 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.
Embodiment 6：Effect is tested and assessed
Standard tensile examination will be made according to the composite board of above-mentioned preparation in establishing criteria GB/T1040.2-2006
Sample, and test compound material nature soil buries the front and rear stretching of degradation in electronic table universal material experimental machine according to above-mentioned standard
Performance, rate of extension 2mm/min.
The polydactyl acid plastics that embodiment 1-5 is prepared are carried out with the test of performance according to this standard, as a result such as table 1
It is shown：
Table 1
It can be seen that the present invention provides a kind of high-toughness polylactic acid wood plastic composite, raw material is natural, existing good
Biodegradability, and with good mechanical property.
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 high-toughness polylactic acid wood plastic composite, its step are as follows：
（1）The preparation of plant fiber：
Take cocoanut fiber, sugarcane bagasse, Manchurian ash wood powder, powdered rice hulls are uniformly mixed；
(2) plant fiber enzyme modification：
According to following parts by weight, 0.6-0.9 parts of lignin peroxidase is taken, 0.5-1 parts of laccase, 0.5 part of 1,4 beta-glucanase,
100 parts of water, is prepared into enzyme solutions；
By mixed plant fiber according to weight ratio 1:In 30 ratio input enzyme solutions, 38 DEG C of processing 40-60min of constant temperature are kept,
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：42-60 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 high-toughness polylactic acid wood plastic composite；
The step（1）For：According to following parts by weight, 50-60 parts of cocoanut fiber, 3-6 parts of sugarcane bagasse, Manchurian ash wood powder 10 are taken
Part, 3 parts of powdered rice hulls are uniformly mixed.
2. the high-toughness 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 |
| CN111410828B (en) * | 2020-05-15 | 2022-08-30 | 运城学院 | Preparation method of plant wood powder/montmorillonite filled high-performance fully biodegradable polylactic acid composite material |
| CN111674045A (en) * | 2020-05-27 | 2020-09-18 | 安徽元琛环保科技股份有限公司 | Preparation method of PLA-based composite material for 3D printing and prepared material |
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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