CN106589869A - Plant fiber-reinforced polylactic acid composite and preparation method thereof - Google Patents
Plant fiber-reinforced polylactic acid composite and preparation method thereof Download PDFInfo
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- CN106589869A CN106589869A CN201611171997.2A CN201611171997A CN106589869A CN 106589869 A CN106589869 A CN 106589869A CN 201611171997 A CN201611171997 A CN 201611171997A CN 106589869 A CN106589869 A CN 106589869A
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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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
- C08J2367/04—Polyesters derived from hydroxy carboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2497/00—Characterised by the use of lignin-containing materials
- C08J2497/02—Lignocellulosic material, e.g. wood, straw or bagasse
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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
-
- 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
Abstract
The invention discloses a plant fiber-reinforced polylactic acid composite and a preparation method thereof and belongs to the field of composites. The method comprises the following steps: step 1, polylactic acid, ethylene-acrylic copolymer and plant fiber are dried for 2-3 h; step 2, thermoplastic rubber, isopropanol, polyacrylamide, sodium lauryl ether sulfate, tolylene-2,4-diisocyanate, soybean oil, sodium tripolyphosphate, fatty acid polyoxyethylene ether, dodecyl dimethyl betaine and cocoanut fatty acid diethanolamide are added to a blender; step 3, the mixture is melted, extruded, diced and dried at the constant temperature; step 4, injection molding is performed. The plant fiber subjected to steam explosion treatment can improve the tensile strength of the polylactic acid composite and notched Lzod impact strength due to the fact that the plant fiber subjected to the steam explosion treatment is less twined, the fiber is uniformly dispersed, and the mechanical performance of the composite is improved.
Description
Technical field
The invention belongs to field of compound material, more particularly to a kind of Plant fiber enhancing lactic acid composite material and its preparation
Method.
Background technology
It with lactic acid is polymer that main polymerizable raw material is obtained that polylactic acid is, raw material sources fully and can regenerate.It is poly-
The production process of lactic acid is pollution-free, and product can realize the circulation in nature with biodegradation, therefore is preferably green
Color macromolecular material.
The Chinese patent application of Application No. CN201510201556.1 discloses a kind of overlay film shell fiber reinforcement polylactic acid
Sheet material and preparation method thereof, overlay film is made up with fibre-reinforced polylactic acid sheet material of shell and preparation method thereof of following raw materials：Really
Case fibre, polylactic acid, bulking agent, lubricant, stabilizer, age resistor.Its preparation method is：Shell material disintegrating is not low into particle diameter
In 20 mesh fibers, then it is dried to moisture below 2%；The shell fiber of dried, polylactic acid, bulking agent, processing are helped
After agent premixing processed, extruded by extruder.The overlay film that the invention is provided is used with shell fiber reinforcement polylactic acid overlay film
Sheet material, plant shell ratio is high, good with biological plasticss interface compatibility, and adhesion is strong, therefore its MOR and elastic modelling quantity are high.
Timber intensity height, wearability, the good impact resistance, water absorption rate is low, long service life, scraps rear recoverable, and produces work
Skill is simple, low cost, and environmental friendliness is used as generation wood or for moulding material, is suitable to industrialized mass production, makes various buildings
Engineering sheet material, such as building concrete template, floor, indoor and outdoor bed board etc..But shell fiber therein is susceptible to winding
Phenomenon, so as to have an impact to the tensile strength of sheet material.
The content of the invention
The present invention strengthens the winding occurred during polylactic acid to solve the problems, such as prior art fiber, there is provided a plant
Fibres strengthen lactic acid composite material and preparation method thereof, using explosion treatment technology is carried out to Plant fiber, realize multiple
The raising of condensation material comprehensive mechanical property.
In order to solve above-mentioned technical problem, the present invention is employed the following technical solutions：
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：20～30 parts of Plant fiber, polylactic acid
60～200 parts, 20～100 parts of ethylene-acrylic acid copolymer, 50～60 parts of thermoplastic elastomer, 20～40 parts of isopropanol, polypropylene
10～15 parts of amide, 1～5 part of sodium lauryl tri(oxyethyl) sulfate, 2～10 parts of the different benzene toluene-2,4-diisocyanates of 2,4-, soybean oil 1～5
Part, 10～30 parts of sodium tripolyphosphate, 20～30 parts of aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt 10～
20 parts, 5～10 parts of cocoanut fatty acid diethanolamide.
Preferably, Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：Plant fiber 25
Part, 100 parts of polylactic acid, 50 parts of ethylene-acrylic acid copolymer, 55 parts of thermoplastic elastomer, 30 parts of isopropanol, polyacrylamide 12
Part, 3 parts of sodium lauryl tri(oxyethyl) sulfate, 5 parts of the different benzene toluene-2,4-diisocyanates of 2,4-, 3 parts of soybean oil, 20 parts of sodium tripolyphosphate, fat
Fat 25 parts of polyethenoxy ether sodium sulfate of acid, 15 parts of dodecyldimethylammonium hydroxide inner salt, 8 parts of cocoanut fatty acid diethanolamide.
Preferably, Plant fiber is Retinervus Luffae Fructuss, cocoanut fiber or Petiolus Trachycarpi silk.
Preferably, acrylic acid mass content is 13～40% in ethylene-acrylic acid copolymer.
Preferably, thermoplastic elastomer is thermoplastic polyurethane rubber or the trans natural rubber of thermoplasticity.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2～3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender is blended 130～150min, and temperature is 30～40 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 250～300r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Preferably, the rotating speed of blender is 300～600r/min.
Preferably, described Plant fiber is the Plant fiber through Steam explosion treatment.
Preferably, the Steam explosion treatment method of described Plant fiber：First Mechanical Crushing, then puts into high pressure and steams
In cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 0.9～1.0MPa, keeps steam 60min, processus aboralis to release steam and pressure
Power, is repeated four times.
The invention has the advantages that：Can strengthen polylactic acid composite wood through the Plant fiber of Steam explosion treatment
The tensile strength and Lzod notch impact strengths of material, this is because the Plant fiber's winding after explosion treatment is reduced, makes fiber point
Dissipate uniform, so as to improve the mechanical property of composite.The addition of the different benzene toluene-2,4-diisocyanates of 2,4- can significantly improve multiple
The Lzod notch impact strengths of condensation material.
Specific embodiment
The present invention is further described in detail with reference to specific embodiment.
Embodiment 1
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：25 parts of Plant fiber, polylactic acid 100
Part, 50 parts of ethylene-acrylic acid copolymer, 55 parts of thermoplastic elastomer, 30 parts of isopropanol, 12 parts of polyacrylamide, lauryl ether
5 parts of the different benzene toluene-2,4-diisocyanate of 3 parts of sodium sulfate, 2,4-, 3 parts of soybean oil, 20 parts of sodium tripolyphosphate, aliphatic acid polyethenoxy ether
25 parts of sodium sulfate, 15 parts of dodecyldimethylammonium hydroxide inner salt, 8 parts of cocoanut fatty acid diethanolamide.
Plant fiber is Retinervus Luffae Fructuss.
Acrylic acid mass content is 30% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is thermoplastic polyurethane rubber.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2～3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender blending 140min, rotating speed is 400r/min, and temperature is 35 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 270r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Described Plant fiber is the Plant fiber through Steam explosion treatment, and method is as follows：Mechanical Crushing first, then
In input high steam cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 1.0MPa, keep steam 60min, processus aboralis to release steam
And pressure, it is repeated four times.
Embodiment 2
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：25 parts of Plant fiber, polylactic acid 100
Part, 60 parts of ethylene-acrylic acid copolymer, 59 parts of thermoplastic elastomer, 33 parts of isopropanol, 12 parts of polyacrylamide, lauryl ether
5 parts of the different benzene toluene-2,4-diisocyanate of 4 parts of sodium sulfate, 2,4-, 3 parts of soybean oil, 22 parts of sodium tripolyphosphate, aliphatic acid polyethenoxy ether
26 parts of sodium sulfate, 19 parts of dodecyldimethylammonium hydroxide inner salt, 8 parts of cocoanut fatty acid diethanolamide.
Plant fiber is cocoanut fiber.
Acrylic acid mass content is 13% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is the trans natural rubber of thermoplasticity.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2.3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender blending 140min, rotating speed is 400r/min, and temperature is 35 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 290r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Described Plant fiber is the Plant fiber through Steam explosion treatment, and method is as follows：Mechanical Crushing first, then
In input high steam cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 0.9MPa, keep steam 60min, processus aboralis to release steam
And pressure, it is repeated four times.
Embodiment 3
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：30 parts of Plant fiber, polylactic acid 200
Part, 100 parts of ethylene-acrylic acid copolymer, 60 parts of thermoplastic elastomer, 40 parts of isopropanol, 15 parts of polyacrylamide, lauryl ether
10 parts of the different benzene toluene-2,4-diisocyanate of 5 parts of sodium sulfate, 2,4-, 5 parts of soybean oil, 30 parts of sodium tripolyphosphate, aliphatic acid polyethenoxy
30 parts of ether sodium sulfate, 20 parts of dodecyldimethylammonium hydroxide inner salt, 10 parts of cocoanut fatty acid diethanolamide.
Plant fiber is Petiolus Trachycarpi silk.
Acrylic acid mass content is 40% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is the trans natural rubber of thermoplasticity.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2～3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender blending 150min, rotating speed is 600r/min, and temperature is 40 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 300r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Described Plant fiber is the Plant fiber through Steam explosion treatment, and method is as follows：Mechanical Crushing first, then
In input high steam cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 1.0MPa, keep steam 60min, processus aboralis to release steam
And pressure, it is repeated four times.
Embodiment 4
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：20 parts of Plant fiber, polylactic acid 60
Part, 20 parts of ethylene-acrylic acid copolymer, 50 parts of thermoplastic elastomer, 20 parts of isopropanol, 10 parts of polyacrylamide, lauryl ether
2 parts of the different benzene toluene-2,4-diisocyanate of 1 part of sodium sulfate, 2,4-, 1 part of soybean oil, 10 parts of sodium tripolyphosphate, aliphatic acid polyethenoxy ether
20 parts of sodium sulfate, 10 parts of dodecyldimethylammonium hydroxide inner salt, 5 parts of cocoanut fatty acid diethanolamide.
Plant fiber is cocoanut fiber.
Acrylic acid mass content is 20% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is thermoplastic polyurethane rubber.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender blending 130min, rotating speed is 300r/min, and temperature is 30 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 250r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Described Plant fiber is the Plant fiber through Steam explosion treatment, and method is as follows：Mechanical Crushing first, then
In input high steam cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 0.9MPa, keep steam 60min, processus aboralis to release steam
And pressure, it is repeated four times.
Reference examples 1
It is with the difference of embodiment 1：The Plant fiber is without explosion treatment.
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：25 parts of Plant fiber, polylactic acid
100 parts, 50 parts of ethylene-acrylic acid copolymer, 55 parts of thermoplastic elastomer, 30 parts of isopropanol, 12 parts of polyacrylamide, dodecyl
5 parts of the different benzene toluene-2,4-diisocyanate of 3 parts of ether sodium sulfate, 2,4-, 3 parts of soybean oil, 20 parts of sodium tripolyphosphate, aliphatic acid polyethenoxy
25 parts of ether sodium sulfate, 15 parts of dodecyldimethylammonium hydroxide inner salt, 8 parts of cocoanut fatty acid diethanolamide.
Plant fiber is Retinervus Luffae Fructuss.
Acrylic acid mass content is 30% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is thermoplastic polyurethane rubber.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2～3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender blending 140min, rotating speed is 400r/min, and temperature is 35 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 270r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Reference examples 2
It is with the difference of embodiment 2：Not plus the different benzene toluene-2,4-diisocyanates of 2,4-.
Plant fiber strengthens lactic acid composite material, including the raw material of following weight portion meter：25 parts of Plant fiber, polylactic acid
100 parts, 60 parts of ethylene-acrylic acid copolymer, 59 parts of thermoplastic elastomer, 33 parts of isopropanol, 12 parts of polyacrylamide, dodecyl
4 parts of ether sodium sulfate, 3 parts of soybean oil, 22 parts of sodium tripolyphosphate, 26 parts of aliphatic acid polyethenoxy ether sodium sulfate, dimethyl
19 parts of base glycine betaine, 8 parts of cocoanut fatty acid diethanolamide.
Plant fiber is cocoanut fiber.
Acrylic acid mass content is 13% in ethylene-acrylic acid copolymer.
Thermoplastic elastomer is the trans natural rubber of thermoplasticity.
Plant fiber strengthens the preparation method of lactic acid composite material, comprises the following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2.3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, soybean oil, tripolyphosphate
Sodium, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and cocoanut fatty acid diethanolamide, blender
Blending 140min, rotating speed is 400r/min, and temperature is 35 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 290r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
Described Plant fiber is the Plant fiber through Steam explosion treatment, and method is as follows：Mechanical Crushing first, then
In input high steam cylinder, 180 DEG C of superheated steams are filled with cylinder, pressure is 0.9MPa, keep steam 60min, processus aboralis to release steam
And pressure, it is repeated four times.
Performance test：
| Tensile strength MPa | Lzod notch impact strengths KJ/m2 | |
| Embodiment 1 | 134 | 36 |
| Embodiment 2 | 133 | 32 |
| Embodiment 3 | 130 | 33 |
| Embodiment 4 | 134 | 35 |
| Reference examples 1 | 99 | 24 |
| Reference examples 2 | 107 | 11 |
As can be seen from the table, the Plant fiber through Steam explosion treatment can strengthen the tensile strength of lactic acid composite material
With Lzod notch impact strengths, this is because the Plant fiber's winding after explosion treatment is reduced, fiber is set to be uniformly dispersed, so as to carry
The mechanical property of high composite.The addition of the different benzene toluene-2,4-diisocyanates of 2,4- can significantly improve the Lzod of composite and lack
Mouth impact strength.
The above, preferably specific embodiment only of the invention, protection scope of the present invention not limited to this are any ripe
Those skilled in the art are known in the technical scope of present disclosure, the letter of the technical scheme that can be become apparent to
Altered or equivalence replacement are each fallen within protection scope of the present invention.
Claims (9)
1. Plant fiber strengthens lactic acid composite material, it is characterised in that including the raw material of following weight portion meter：Plant fiber 20
～30 parts, 60～200 parts of polylactic acid, 20～100 parts of ethylene-acrylic acid copolymer, 50～60 parts of thermoplastic elastomer, isopropanol 20
～40 parts, 10～15 parts of polyacrylamide, 1～5 part of sodium lauryl tri(oxyethyl) sulfate, the different benzene toluene-2,4-diisocyanates 2～10 of 2,4-
Part, 1～5 part of soybean oil, 10～30 parts of sodium tripolyphosphate, 20～30 parts of aliphatic acid polyethenoxy ether sodium sulfate, dodecyl two
10～20 parts of methyl betaine, 5～10 parts of cocoanut fatty acid diethanolamide.
2. Plant fiber according to claim 1 strengthens lactic acid composite material, it is characterised in that including following weight portion
The raw material of meter：25 parts of Plant fiber, 100 parts of polylactic acid, 50 parts of ethylene-acrylic acid copolymer, 55 parts of thermoplastic elastomer, isopropanol
30 parts, 12 parts of polyacrylamide, 3 parts of sodium lauryl tri(oxyethyl) sulfate, 5 parts of the different benzene toluene-2,4-diisocyanates of 2,4-, 3 parts of soybean oil,
20 parts of sodium tripolyphosphate, 25 parts of aliphatic acid polyethenoxy ether sodium sulfate, 15 parts of dodecyldimethylammonium hydroxide inner salt, coconut oil fat
8 parts of sour diglycollic amide.
3. Plant fiber according to claim 1 strengthens lactic acid composite material, it is characterised in that Plant fiber is Fructus Luffae
Network, cocoanut fiber or Petiolus Trachycarpi silk.
4. Plant fiber according to claim 1 strengthens lactic acid composite material, it is characterised in that ethylene-acrylic acid is common
Acrylic acid mass content is 13～40% in polymers.
5. Plant fiber according to claim 1 strengthens lactic acid composite material, it is characterised in that thermoplastic elastomer is heat
Plastic polyurethane rubber or the trans natural rubber of thermoplasticity.
6. the preparation method of lactic acid composite material is strengthened based on the Plant fiber described in claim 1, it is characterised in that included
Following steps：
The first step, polylactic acid, ethylene-acrylic acid copolymer and Plant fiber dry 2～3h；
Second step, adds thermoplastic elastomer, isopropanol, polyacrylamide, sodium lauryl tri(oxyethyl) sulfate, the different Carbimide .s of benzene two of 2,4-
Toluene ester, soybean oil, sodium tripolyphosphate, aliphatic acid polyethenoxy ether sodium sulfate, dodecyldimethylammonium hydroxide inner salt and Oleum Cocois
Fatty diglycollic amide, blender is blended 130～150min, and temperature is 30～40 DEG C；
3rd step, extrudes, pelletizing, freeze-day with constant temperature after melting；Extruder temperature is 190～205 DEG C, and one section to five sections of temperature sets
It is set to 205 DEG C, 190 DEG C, 200 DEG C, 200 DEG C, screw speed is 250～300r/min；
4th step, injection mo(u)lding, the temperature that a section to four sections of injection machine is 180 DEG C, 175 DEG C, 170 DEG C, 165 DEG C, and rotating speed is
300r/min, injection pressure 35Mpa, 70 DEG C of mold temperature, cool time 10s, dwell time 12s.
7. Plant fiber according to claim 6 strengthens the preparation method of lactic acid composite material, it is characterised in that blending
The rotating speed of machine is 300～600r/min.
8. Plant fiber according to claim 6 strengthens the preparation method of lactic acid composite material, it is characterised in that described
Plant fiber be Plant fiber through Steam explosion treatment.
9. Plant fiber according to claim 8 strengthens the preparation method of lactic acid composite material, it is characterised in that described
Plant fiber Steam explosion treatment method：First Mechanical Crushing, then puts in high steam cylinder, and 180 DEG C are filled with cylinder
Superheated steam, pressure is 0.9～1.0MPa, keeps steam 60min, processus aboralis to release steam and pressure, be repeated four times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611171997.2A CN106589869A (en) | 2016-12-17 | 2016-12-17 | Plant fiber-reinforced polylactic acid composite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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