CN104231512A - Preparation method of degradable wood-plastic composite material and degradable wood-plastic composite material - Google Patents
Preparation method of degradable wood-plastic composite material and degradable wood-plastic composite material Download PDFInfo
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- CN104231512A CN104231512A CN201410429160.8A CN201410429160A CN104231512A CN 104231512 A CN104231512 A CN 104231512A CN 201410429160 A CN201410429160 A CN 201410429160A CN 104231512 A CN104231512 A CN 104231512A
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Abstract
The invention relates to a preparation method of a degradable wood-plastic composite material. The preparation method comprises the following steps of (1) preparing the following components in parts by weight: 60-80 parts of polybutylene succinate (PBS), 50-60 parts of polylactic acid, 50-120 parts of wood powder, 1-5 parts of zinc oxide, 1-2 parts of maleic anhydride, 0.05-1 part of dicumyl peroxide, 10-15 parts of dimethylbenzene, 60-70 parts of acetone, 10-20 parts of flame retardant, 1-5 parts of stabilizer and 1-5 parts of wood powder modifier; (2) drying the wood powder, and modifying; (3) carrying out graft copolymerization on PBS and polylactic acid; (4) carrying out purification treatment; (5) adding all the components into a high-speed mixer to mix; and (6) carrying out extrusion molding, injection molding or compression molding to obtain the degradable wood-plastic composite material. The invention also discloses the degradable wood-plastic composite material prepared by using the method.
Description
Technical field
The present invention relates to furniture manufacturing field, be specifically related to a kind of preparation method of the degradable wood plastic composite for the manufacture of furniture, and by goods prepared by the method.
Background technology
Wood plastic composite (Wood-Plastic Composites, WPC) be the class advanced composite material be in recent years surging forward both at home and abroad, refer to utilize polyethylene, polypropylene and polyvinyl chloride etc., replace common resin adhesive, new wood materials is mixed into useless vegetable fibres such as the wood powder more than more than 50%, rice husk, stalks, again through plastic processings such as extruding, mold pressing, injection moldings, the sheet material produced or section bar.Be mainly used in the industries such as building materials, furniture, logistics packaging.Through the sheet material of hot extrusion molding after plastics and wooden powder are mixed by a certain percentage, be referred to as to extrude wood-plastic composite panel.
The basis of wood plastic composite is high density polyethylene(HDPE) and wood fibre, determines some characteristic himself with plastics and timber.1) good processing characteristics wood plastic composite includes plastics and fiber, therefore, has the processing characteristics that same timber is similar, can saw, can follow closely, can dig, and use carpenter's utensil to complete, and nail-holding ability is obviously better than other synthetic materialss.Mechanical property is better than wood materials.Nail-holding ability is generally 3 times of timber, is 5 times of shaving board.2) good strength property wood plastic composite includes plastics, thus has good Young's modulus.In addition, due to including fiber and through fully mixing with plastics, thus there is the resistance to compression suitable with hardwood, the physical and mechanical properties such as counter-bending, and its wearing quality is obviously better than normal wood material.Surface hardness is high, is generally 2 of timber---and 5 times.3) have water-fast, corrosion resistant performance, long service life Wood-plastic material and products thereof, can anti-strong acid-base, water-fast, corrosion-resistant compared with timber, and not bacterial growth, is not easily damaged by worms, not long fungi.Long service life, can reach more than 50 years.4) excellent adjustable by auxiliary agent, the changes such as plastics can be polymerized, foam, solidify, modification, thus the characteristic such as density, intensity changing Wood-plastic material, can also reach anti-aging, anti-electrostatic, the particular requirement such as fire-retardant.5) there is ultraviolet stability, tint permanence is good.6) its great advantage turns waste into wealth exactly, and can 100% reclaiming produce.Can decompose, can not cause " white pollution ", be real Green Product.7) plastic raw materials of raw material sources widespread production wood plastic composite mainly high density polyethylene(HDPE) or polypropylene, wood fibre can be wood powder, cavings or xylon, also needs a small amount of additive and other processing aids in addition.8) as required, arbitrary shape and size can be made.Along with the research and development to wood plastic composite, produce the plastic raw materials of wood plastic composite, except having high density polyethylene(HDPE) or polypropylene, also have polyvinyl chloride and PS.Technique also develops into s-generation conical double screw extruder by single screw extrusion machine the earliest, arrive by parallel double-screw extruder preliminary granulation again, again by conical screw extrusion moulding, can make up and be difficult to plasticizing, resistance to deterioration is poor, creep resistance is poor, the consistence of color and persistence are poor and tensile strength is low feature.
Mostly be nondegradable wood plastic composite at present for furniture manufacturing field, and nondegradable wood plastic composite is less can recycling, cause the wasting of resources, cost virtual height.And some uses degradable wood plastic composite, owing to can not meet the associated technical parameters of furniture, the furniture quality produced is poor, and work-ing life is low.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, provide a kind of for Furniture manufacture, furniture main technical details demand, the preparation method of degradable wood plastic composite can be met, and by goods prepared by the method.
The technical scheme that the present invention is adopted for achieving the above object is:
A preparation method for degradable wood plastic composite, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared wooden powder properties-correcting agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
Described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, wooden powder properties-correcting agent is diluted to 20% (V/V), then the wooden powder properties-correcting agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
Step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 155 ~ 175 DEG C, and barrel front-end temperature is 160 ~ 170 DEG C, and screw speed is 30 ~ 50r/min, the residence time 2 ~ 5min.
Step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, make it dissolve completely, pour in acetone after cooling, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
Fire retardant described in step (1) is ammonium polyphosphate, and trimeric cyanamide and dipentaerythritol are wherein a kind of, and described stablizer is epoxy soybean oil, and described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
Implement a degradable wood plastic composite prepared by described method, it is by the component by following parts by weight: poly butylene succinate PBS:60 ~ 80 part; Poly(lactic acid): 50 ~ 60 parts; Wooden powder: 50 ~ 120 parts; Zinc oxide: 1 ~ 5 part; Maleic anhydride: 1 ~ 2 part; Dicumyl peroxide: 0.05 ~ 1 part; Dimethylbenzene: 10 ~ 15 parts; Acetone: 60 ~ 70 parts; Fire retardant: 10 ~ 20 parts; Stablizer: 1 ~ 5 part; Wooden powder properties-correcting agent: 1 ~ 5 part obtaining, wherein, by carrying out drying to wooden powder, and with prepared wooden powder properties-correcting agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
Described fire retardant is ammonium polyphosphate, and trimeric cyanamide and dipentaerythritol are wherein a kind of.
Described stablizer is epoxy soybean oil.
Described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
The invention has the beneficial effects as follows: matrix material of the present invention; adopt degradable plastics poly butylene succinate PBS and poly(lactic acid) graft copolymerization, then mix with wooden powder, prepared matrix material; intensity is high; corrosion-resistant degree is strong, the needs that complete composite furniture manufactures, simultaneously; matrix material of the present invention; under field conditions (factors) by microbiological deterioration, also can recycling, be conducive to economizing on resources and protection of the environment.
Embodiment
Embodiment 1:
The preparation method of the degradable wood plastic composite that the present embodiment provides, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared wooden powder properties-correcting agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20 min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
Described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, wooden powder properties-correcting agent is diluted to 20% (V/V), then the wooden powder properties-correcting agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
Step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 155 ~ 175 DEG C, and barrel front-end temperature is 160 ~ 170 DEG C, and screw speed is 30 ~ 50r/min, the residence time 2 ~ 5min.
Step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, make it dissolve completely, pour in acetone after cooling, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
Fire retardant described in step (1) is ammonium polyphosphate, and trimeric cyanamide and dipentaerythritol are wherein a kind of, and described stablizer is epoxy soybean oil, and described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
Implement a degradable wood plastic composite prepared by described method, it is by the component by following parts by weight: poly butylene succinate PBS:60 ~ 80 part; Poly(lactic acid): 50 ~ 60 parts; Wooden powder: 50 ~ 120 parts; Zinc oxide: 1 ~ 5 part; Maleic anhydride: 1 ~ 2 part; Dicumyl peroxide: 0.05 ~ 1 part; Dimethylbenzene: 10 ~ 15 parts; Acetone: 60 ~ 70 parts; Fire retardant: 10 ~ 20 parts; Stablizer: 1 ~ 5 part; Wooden powder properties-correcting agent: 1 ~ 5 part obtaining, wherein, by carrying out drying to wooden powder, and with prepared wooden powder properties-correcting agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
Described fire retardant is ammonium polyphosphate, and trimeric cyanamide and dipentaerythritol are wherein a kind of.
Described stablizer is epoxy soybean oil.
Described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
Embodiment 2: the preparation method of the degradable wood plastic composite that the present embodiment provides, and by goods prepared by the method, its step and component substantially the same manner as Example 1, its difference is:
A preparation method for degradable wood plastic composite, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared silane coupling agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and ammonium polyphosphate, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 70 DEG C of temperature condition, mixing 15min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
Described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, silane coupling agent is diluted to 20% (V/V), then the silane coupling agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
Step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 155 DEG C, and barrel front-end temperature is 160 DEG C, and screw speed is 30r/min, residence time 2min.
Step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, make it dissolve completely, pour in acetone after cooling, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
Implement a degradable wood plastic composite prepared by described method, it is by the component by following parts by weight: poly butylene succinate PBS:60 part; Poly(lactic acid): 50 parts; Wooden powder: 50 parts; Zinc oxide: 1 part; Maleic anhydride: 1 part; Dicumyl peroxide: 0.05 part; Dimethylbenzene: 10 parts; Acetone: 60 parts; Ammonium polyphosphate: 10 parts; Epoxy soybean oil: 1 part; Silane coupling agent: 1 part obtaining, wherein, by carrying out drying to wooden powder, and with prepared silane coupling agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and ammonium polyphosphate, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 70 DEG C of temperature condition, mixing 15min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
Embodiment 3: the preparation method of the degradable wood plastic composite that the present embodiment provides, and by goods prepared by the method, its step and component substantially identical with embodiment 1,2, its difference is:
A preparation method for degradable wood plastic composite, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared titanate coupling agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and trimeric cyanamide, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 74 DEG C of temperature condition, mixing 18min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
Described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, titanate coupling agent is diluted to 20% (V/V), then the titanate coupling agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
Step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 160 DEG C, and barrel front-end temperature is 165 DEG C, and screw speed is 40r/min, residence time 3min.
Step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, make it dissolve completely, pour in acetone after cooling, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
Implement a degradable wood plastic composite prepared by described method, it is by the component by following parts by weight: poly butylene succinate PBS:70 part; Poly(lactic acid): 55 parts; Wooden powder: 100 parts; Zinc oxide: 4 parts; Maleic anhydride: 1.5 parts; Dicumyl peroxide: 0.5 part; Dimethylbenzene: 12 parts; Acetone: 63 parts; Trimeric cyanamide: 17 parts; Epoxy soybean oil: 3 parts; Titanate coupling agent: 3 parts obtaining, wherein, by carrying out drying to wooden powder, and with prepared titanate coupling agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and trimeric cyanamide, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 74 DEG C of temperature condition, mixing 18min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
Embodiment 4: the present embodiment provides a kind of preparation method of degradable wood plastic composite, and by goods prepared by the method, its step and component substantially the same manner as Example 1, its difference is:
A preparation method for degradable wood plastic composite, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared silane coupling agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and dipentaerythritol, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 80 DEG C of temperature condition, mixing 20min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
Described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, silane coupling agent is diluted to 20% (V/V), then the silane coupling agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
Step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 175 DEG C, and barrel front-end temperature is 170 DEG C, and screw speed is 50r/min, residence time 5min.
Step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, make it dissolve completely, pour in acetone after cooling, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
Implement a degradable wood plastic composite prepared by described method, it is by the component by following parts by weight: poly butylene succinate PBS:80 part; Poly(lactic acid): 60 parts; Wooden powder: 120 parts; Zinc oxide: 5 parts; Maleic anhydride: 2 parts; Dicumyl peroxide: 1 part; Dimethylbenzene: 15 parts; Acetone: 70 parts; Dipentaerythritol: 20 parts; Epoxy soybean oil: 5 parts; Silane coupling agent: 5 parts obtaining, wherein, by carrying out drying to wooden powder, and with prepared silane coupling agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and dipentaerythritol, epoxy soybean oil and zinc oxide, join in high-speed mixer, under 80 DEG C of temperature condition, mixing 20min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
Material of the present invention, under field conditions (factors) by microorganism natural degradation, and material impact-resistant intensity reaches 5kJ/m
2~ 6.5kJ/m
2, improve 20 ~ 30% than normal wood moulding material impact strength, tensile strength 25MPa ~ 30MPa, promote 7 ~ 8% than normal wood moulding material.
But the foregoing is only better possible embodiments of the present invention; and be not used to limit to the scope of the claims of the present invention; therefore other embodiments of the step recorded in all utilization the present invention, component and application, and the equivalence change done, be all included in protection scope of the present invention.
Claims (9)
1. a preparation method for degradable wood plastic composite, is characterized in that, it comprises the following steps:
(1) each component is prepared by following parts by weight:
(2) drying is carried out to wooden powder, and with prepared wooden powder properties-correcting agent, modification is carried out to dried wooden powder;
(3) with maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid);
(4) with dimethylbenzene and acetone, the poly butylene succinate PBS obtained step (3), the multipolymer of poly(lactic acid), carry out purification process;
(5) by modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20min;
(6) through extruding, injection moulding or compression moulding, degradable wood plastic composite is obtained.
2. the preparation method of degradable wood plastic composite according to claim 1, it is characterized in that, described step (2) specifically comprises: by wooden powder in electric drying oven with forced convection, drying 4 hours under 120 DEG C of temperature condition, and carry out degreasing and oven dry, its water ratio is made to be less than 0.2%, with acetone, wooden powder properties-correcting agent is diluted to 20% (V/V), then the wooden powder properties-correcting agent after dilution is sprayed the wooden powder of process, then add in high-speed mixer and carry out pre-mixing 0.5h.
3. the preparation method of degradable wood plastic composite according to claim 1, it is characterized in that, step (3) specifically comprises: maleic anhydride and dicumyl peroxide are mixed, and be dissolved in acetone soln and mix, then this mixing solutions is sprayed onto on poly butylene succinate PBS and poly-lactic acid mixture pellet, stirs and make it disperse equably; After acetone soln vapors away, mixture is joined in twin screw extruder hopper, carry out frit reaction and extrude, obtain the multipolymer of poly butylene succinate PBS, poly(lactic acid); Wherein, twin-screw extruder barrel back segment temperature is 155 ~ 175 DEG C, and barrel front-end temperature is 160 ~ 170 DEG C, and screw speed is 30 ~ 50r/min, the residence time 2 ~ 5min.
4. the preparation method of degradable wood plastic composite according to claim 1, it is characterized in that, step (4) specifically comprises: by the multipolymer of poly butylene succinate PBS, poly(lactic acid), be placed in dimethylbenzene, and reflux, it is made to dissolve completely, pour into after cooling in acetone, described dimethylbenzene and acetone volume ratio are 1: 3, after there is flocks in acetone, to vacuum filtration be precipitated, and with acetone rinsing, after drying, namely obtain the poly butylene succinate PBS of purifying, the multipolymer of poly(lactic acid).
5. the preparation method of degradable wood plastic composite according to claim 1, it is characterized in that, fire retardant described in step (1) is ammonium polyphosphate, trimeric cyanamide and dipentaerythritol are wherein a kind of, described stablizer is epoxy soybean oil, and described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
6. implement the claims a degradable wood plastic composite prepared by one of 1 ~ 5 described method, it is characterized in that, it is by the component by following parts by weight: poly butylene succinate PBS:60 ~ 80 part; Poly(lactic acid): 50 ~ 60 parts; Wooden powder: 50 ~ 120 parts; Zinc oxide: 1 ~ 5 part; Maleic anhydride: 1 ~ 2 part; Dicumyl peroxide: 0.05 ~ 1 part; Dimethylbenzene: 10 ~ 15 parts; Acetone: 60 ~ 70 parts; Fire retardant: 10 ~ 20 parts; Stablizer: 1 ~ 5 part; Wooden powder properties-correcting agent: 1 ~ 5 part obtaining, wherein, by carrying out drying to wooden powder, and with prepared wooden powder properties-correcting agent, carrying out modification to dried wooden powder; With maleic anhydride and dicumyl peroxide, graft copolymerization is carried out to poly butylene succinate PBS and poly(lactic acid), obtains the multipolymer of poly butylene succinate PBS, poly(lactic acid); With dimethylbenzene and acetone, to the multipolymer of the poly butylene succinate PBS obtained, poly(lactic acid), carry out purification process; By modified wooden powder, the multipolymer of poly butylene succinate PBS, poly(lactic acid), and fire retardant, stablizer and zinc oxide, join in high-speed mixer, under 70 ~ 80 DEG C of temperature condition, mixing 15 ~ 20min; Through extruding, injection moulding, compression moulding, obtain degradable wood plastic composite.
7. degradable wood plastic composite according to claim 6, is characterized in that, described fire retardant is ammonium polyphosphate, and trimeric cyanamide and dipentaerythritol are wherein a kind of.
8. degradable wood plastic composite according to claim 6, is characterized in that, described stablizer is epoxy soybean oil.
9. degradable wood plastic composite according to claim 6, is characterized in that, described wooden powder properties-correcting agent is titanate coupling agent or silane coupling agent.
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| CN201410429160.8A CN104231512A (en) | 2014-08-27 | 2014-08-27 | Preparation method of degradable wood-plastic composite material and degradable wood-plastic composite material |
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| CN107254147A (en) * | 2017-06-09 | 2017-10-17 | 陕西科技大学 | A kind of preparation method of degradable wood plastic composite |
| CN107641330A (en) * | 2017-09-26 | 2018-01-30 | 苏州市木包装材料有限公司 | A kind of degradable high tenacity wood moulding packaging material and preparation method thereof |
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