CN105237977A - Bamboo fiber reinforced degradable PLA material and preparation method thereof - Google Patents
Bamboo fiber reinforced degradable PLA material and preparation method thereof Download PDFInfo
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- CN105237977A CN105237977A CN201510748163.2A CN201510748163A CN105237977A CN 105237977 A CN105237977 A CN 105237977A CN 201510748163 A CN201510748163 A CN 201510748163A CN 105237977 A CN105237977 A CN 105237977A
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Abstract
The invention discloses a bamboo fiber reinforced degradable PLA material and a preparation method thereof. Raw materials for preparing the bamboo fiber reinforced degradable PLA material comprise, by weight, 30-70 parts of polylactic acid resin, 15-40 parts of bamboo fibers, 0.5-2 parts of a coupling agent, 10-30 parts of inorganic powder, 0.5-5 parts of a compatilizer, 0.1-0.5 parts of an antioxidant, 0.5-3 parts of a dispersant and 3-5 parts of a lubricant. The bamboo fiber reinforced degradable PLA material is prepared through blending the bamboo fibers and other assistants with the polylactic acid resin, so the strength of the PLA material is effectively improved, thereby the PLA material can be widely applied in fields of automobile parts, decoration finishing, electric appliance products and packaging; and the material also has the advantages of degradability, environmental protection, and good environmental and social benefits.
Description
Technical field
The invention belongs to technical field of polymer materials, degradable PLA material being specifically related to a kind of bamboo fiber reinforcement and preparation method thereof.
Background technology
Chinese Bamboos aboundresources, bamboo-processing industry is flourishing, but along with the development of agroforestry, the bamboo product waste (bamboo powder, bamboo silk, bamboo branch etc.) in the production of forestry course of processing constantly increases, not only ecotope is polluted, and cause the waste of physical resources.According to statistics: common bamboo wood physical and mechanical properties processing, its weight utilization ratio, lower than 40%, has the bamboo wood of more than 60% to become industrial wood waste.In addition, along with the continuous progress of society, plastics more and more become the indispensable articles for use of people's daily life, but plastics are bringing easily simultaneously, also a series of problem is brought: 1, current plastics are mainly refined by the Nonrenewable resources such as oil, Sweet natural gas and form, and the resource reserves such as the oil of the earth are limited, along with the continuous exploitation of the mankind, crisis-ridden, spurt in prices; 2, plastic refuse is more difficult in the environment degrades voluntarily, and along with the Application Areas of plastics constantly expands, the environmental pollution caused thus is day by day serious.
Summary of the invention
The object of the invention is to, for current industry Situation, degradable PLA material that a kind of bamboo fiber reinforcement is provided and preparation method thereof, the degradable PLA material of its gained bamboo fiber reinforcement has the advantages such as environmental protection, degradable, saving petroleum resources, and its preparation method production efficiency is high, with low cost, equipment investment is few, be easy to industrialization production.
For achieving the above object, the present invention adopts following technical scheme:
A degradable PLA material for bamboo fiber reinforcement, it is raw materials used counts by weight: polylactic resin 30 ~ 70 parts; Bamboo fibers 15 ~ 40 parts; Coupling agent 0.5 ~ 2 part; Inorganic powder 10 ~ 30 parts; Compatilizer 0.5 ~ 5 part; 0.1 ~ 0.5 part, oxidation inhibitor; Dispersion agent 0.5 ~ 3 part; Lubricant 3 ~ 5 parts.
The mean diameter of described bamboo fibers is 45 250 μm.
Described coupling agent is one or more in titanate coupling agent, aluminate coupling agent, polymeric isocyanate, silane coupling agent, maleic anhydride/peroxide initiator mixture;
Described silane coupling agent comprises hexamethyldisilazane, hexamethyldisiloxane, vinyl three ('beta '-methoxy oxyethyl group) silane, aminopropyl triethoxysilane.
Described inorganic powder is one or more in calcium carbonate, kaolin, talcum powder, wollastonite powder.
Described compatilizer is one or more in maleic anhydride grafted polyethylene (PE-g-MA), maleic anhydride inoculated polypropylene (PP-g-MA), maleic anhydride graft terpolymer EP rubber (EPDM-g-MA), maleic anhydride graft styrene-butadiene-styrene ternary block copolymer (SEBS-g-MA).
Described oxidation inhibitor is mixed by weight 2 ︰ 1 by four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three (2,4-di-tert-butyl-phenyl) phosphorous acid ester.
Described dispersion agent is one or more in stearic acid, Zinic stearas, Magnesium Stearate, calcium stearate.
Described lubricant is one or more in stearic acid, Metallic stearates, paraffin, polyethylene wax or Poly Propylene Wax;
Described Metallic stearates comprises sodium stearate, strontium stearate, calcium stearate, Zinic stearas.
The preparation method of the degradable PLA material of described bamboo fiber reinforcement comprises the following steps:
1) bamboo fibers is ground into the bamboo powder by 60 325 mesh sieves, then vacuum drying 12 hours at 110 DEG C, make its moisture content be no more than 10%(preferably, its moisture content is no more than 2%); Add coupling agent again, in high mixer, carry out 30min surface modification treatment, obtained active bamboo powder;
2) step 1) gained active bamboo powder and polylactic resin, inorganic powder, compatilizer, oxidation inhibitor, dispersion agent, lubricant are added in high-speed mixer in proportion, make Preblend with 1000r/min mixing 20min;
3) by step 2) gained Preblend inject screw extrusion press carry out melt blending, granulation.
Described screw extrusion press is single screw extrusion machine or multiple screw extruder; Its extrusion die temperature is 150 DEG C, and screw speed is 200r/min.
the invention has the advantages that:
(1) the present invention proposes a kind of degradable PLA material of bamboo fiber reinforcement, its be by by bamboo fibers, inorganic powder and other auxiliary agents and polylactic resin blended obtained.This not only effectively can improve the intensity of PLA material, and this material degradable, environmental protection, there is good environmental benefit and economic benefit.
(2) the present invention adopts coupling agent to carry out surface modification treatment to bamboo fibers, simultaneously by adding compatilizer and the interface compatibility between other auxiliary agents raising bamboo fibers and resin, and improve the processing fluidity of matrix material, thus improve the over-all properties of product simultaneously.
(3) the invention allows for a kind of preparation method of degradable PLA material of bamboo fiber reinforcement, the method has that production efficiency is high, with low cost, equipment investment is few, be easy to the advantages such as industrialization production.
Embodiment
More being convenient to make content of the present invention understand, below in conjunction with embodiment, technical solutions according to the invention are described further, but the present invention being not limited only to this.
The mean diameter of bamboo fibers used is 45 250 μm.
Oxidation inhibitor used is mixed by weight 2 ︰ 1 by four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three (2,4-di-tert-butyl-phenyl) phosphorous acid ester.
Embodiment 1:
(1) polylactic resin 30 parts is taken by weight; Bamboo fibers 15 parts; Hexamethyldisilazane coupling agent 0.5 part; 100 parts, calcium carbonate; Maleic anhydride inoculated polypropylene (PP-g-MA) 0.5 part; 0.1 part, oxidation inhibitor; Stearic acid 0.5 part; Polyethylene wax 3 parts;
(2) bamboo fibers is ground into the bamboo powder by 60 mesh sieves, then vacuum drying 12 hours at 110 DEG C, makes its moisture content be 1%; Add coupling agent again, in high mixer, carry out 30min surface modification treatment, obtained active bamboo powder;
(3) gained active bamboo powder and polylactic resin, inorganic powder, compatilizer, oxidation inhibitor, dispersion agent, lubricant are added in high-speed mixer in proportion, make Preblend with 1000r/min mixing 20min;
(4) single screw extrusion machine that extrusion die temperature is 150 DEG C is injected in gained Preblend, melt blending, granulation under the screw speed of 200r/min, obtain the degradable PLA material of described bamboo fiber reinforcement.
Embodiment 2:
(1) polylactic resin 40 parts is taken by weight; Bamboo fibers 27 parts; Aluminate coupling agent 1 part; Talcum powder 18 parts; Maleic anhydride graft terpolymer EP rubber (EPDM-g-MA) 3.5 parts; 0.4 part, oxidation inhibitor; Magnesium Stearate 1.8 parts; Poly Propylene Wax 4 parts;
(2) bamboo fibers is ground into the bamboo powder by 120 mesh sieves, then vacuum drying 12 hours at 110 DEG C, makes its moisture content be 2%; Add coupling agent again, in high mixer, carry out 30min surface modification treatment, obtained active bamboo powder;
(3) gained active bamboo powder and polylactic resin, inorganic powder, compatilizer, oxidation inhibitor, dispersion agent, lubricant are added in high-speed mixer in proportion, make Preblend with 1000r/min mixing 20min;
(4) single screw extrusion machine that extrusion die temperature is 150 DEG C is injected in gained Preblend, melt blending, granulation under the screw speed of 200r/min, obtain the degradable PLA material of described bamboo fiber reinforcement.
Embodiment 3
(1) polylactic resin 70 parts is taken by weight; Bamboo fibers 40 parts; Titanate coupling agent 0.5 part, polymeric isocyanate 1.5 parts; Kaolin 20 parts, wollastonite powder 10 parts; Maleic anhydride graft terpolymer EP rubber (EPDM-g-MA) 5 parts; 0.5 part, oxidation inhibitor; Magnesium Stearate 3 parts; Strontium stearate 2 parts, 3 parts, paraffin;
(2) bamboo fibers is ground into the bamboo powder by 325 mesh sieves, then vacuum drying 12 hours at 110 DEG C, makes its moisture content be 10%; Add coupling agent again, in high mixer, carry out 30min surface modification treatment, obtained active bamboo powder;
(3) gained active bamboo powder and polylactic resin, inorganic powder, compatilizer, oxidation inhibitor, dispersion agent, lubricant are added in high-speed mixer in proportion, make Preblend with 1000r/min mixing 20min;
(4) multiple screw extruder that extrusion die temperature is 150 DEG C is injected in gained Preblend, melt blending, granulation under the screw speed of 200r/min, obtain the degradable PLA material of described bamboo fiber reinforcement.
The degradable PLA material of embodiment 1-3 gained bamboo fiber reinforcement and the PLA material without bamboo fiber reinforcement are carried out performance measurement, and it the results are shown in Table 1.
Table 1 performance measurement result
From table 1 result, bending resistance, the tensile property of the degradable PLA material of bamboo fiber reinforcement of the present invention are significantly improved, fundamentally can solve the shortcoming that existing PLA material mechanical strength is low, greatly improve Application Areas, make it can be widely used in the fields such as trolley part, decorations, electric equipment products, packaging.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (10)
1. a degradable PLA material for bamboo fiber reinforcement, is characterized in that: it is raw materials used counts by weight: polylactic resin 30 ~ 70 parts; Bamboo fibers 15 ~ 40 parts; Coupling agent 0.5 ~ 2 part; Inorganic powder 10 ~ 30 parts; Compatilizer 0.5 ~ 5 part; 0.1 ~ 0.5 part, oxidation inhibitor; Dispersion agent 0.5 ~ 3 part; Lubricant 3 ~ 5 parts.
2. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: the mean diameter of described bamboo fibers is 45 250 μm.
3. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: described coupling agent is one or more in titanate coupling agent, aluminate coupling agent, polymeric isocyanate, silane coupling agent, maleic anhydride/peroxide initiator mixture;
Described silane coupling agent comprises hexamethyldisilazane, hexamethyldisiloxane, vinyl three ('beta '-methoxy oxyethyl group) silane, aminopropyl triethoxysilane.
4. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: described inorganic powder is one or more in calcium carbonate, kaolin, talcum powder, wollastonite powder.
5. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: described compatilizer is one or more in maleic anhydride grafted polyethylene, maleic anhydride inoculated polypropylene, maleic anhydride graft terpolymer EP rubber, maleic anhydride graft styrene-butadiene-styrene ternary block copolymer.
6. the degradable PLA material of bamboo fiber reinforcement according to claim 1, it is characterized in that: described oxidation inhibitor is by four [β-(3,5-di-tert-butyl-hydroxy phenyl) propionic acid] pentaerythritol ester and three (2,4-di-tert-butyl-phenyl) phosphorous acid ester mixes by weight 2 ︰ 1.
7. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: described dispersion agent is one or more in stearic acid, Zinic stearas, Magnesium Stearate, calcium stearate.
8. the degradable PLA material of bamboo fiber reinforcement according to claim 1, is characterized in that: described lubricant is one or more in stearic acid, Metallic stearates, paraffin, polyethylene wax or Poly Propylene Wax;
Described Metallic stearates comprises sodium stearate, strontium stearate, calcium stearate, Zinic stearas.
9. a preparation method for the degradable PLA material of bamboo fiber reinforcement as claimed in claim 1, is characterized in that: comprise the following steps:
1) bamboo fibers is ground into the bamboo powder by 60 325 mesh sieves, then vacuum drying 12 hours at 110 DEG C, makes its moisture content be no more than 10%; Add coupling agent again, in high mixer, carry out 30min surface modification treatment, obtained active bamboo powder;
2) step 1) gained active bamboo powder and polylactic resin, inorganic powder, compatilizer, oxidation inhibitor, dispersion agent, lubricant are added in high-speed mixer in proportion, make Preblend with 1000r/min mixing 20min;
3) by step 2) gained Preblend inject screw extrusion press carry out melt blending, granulation.
10. the preparation method of the degradable PLA material of bamboo fiber reinforcement according to claim 9, is characterized in that: described screw extrusion press is single screw extrusion machine or multiple screw extruder; Its extrusion die temperature is 150 DEG C, and screw speed is 200r/min.
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