CN117534888A - Preparation method and product of wind power blade recovery reinforced wood-plastic composite material - Google Patents
Preparation method and product of wind power blade recovery reinforced wood-plastic composite material Download PDFInfo
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- CN117534888A CN117534888A CN202311356683.XA CN202311356683A CN117534888A CN 117534888 A CN117534888 A CN 117534888A CN 202311356683 A CN202311356683 A CN 202311356683A CN 117534888 A CN117534888 A CN 117534888A
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- 238000011084 recovery Methods 0.000 title claims abstract description 77
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- 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
- C08J5/08—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials glass fibres
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/06—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to homopolymers or copolymers of aliphatic hydrocarbons containing only one carbon-to-carbon double bond
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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
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- C—CHEMISTRY; METALLURGY
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- C08L97/02—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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
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- 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
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
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Abstract
The invention discloses a preparation method and a product of a wind power blade recovery reinforced wood-plastic composite material. The preparation method of the wind power blade recovery reinforced wood-plastic composite material comprises the following steps: s1: carrying out low-temperature plasma treatment on the recycled resin of the wind power blade; s2: compounding the wind power blade recovery fiber with polyolefin to prepare wind power blade recovery fiber reinforced polyolefin master batch; s3: and mixing the modified wind power blade recovery resin and the wind power blade recovery fiber reinforced polyolefin master batch with polyolefin and/or maleic anhydride grafted polyolefin, biomass fiber and other auxiliary agents, granulating, and extruding to form the waste wind power blade recovery fiber reinforced polyolefin-based wood-plastic composite material. The invention is beneficial to overcoming the defect that the prior art cannot well utilize the fan blade to recycle the fiber and has insufficient performance when preparing the wood-plastic composite material. The invention also provides a wind power blade recovery reinforced wood-plastic composite product.
Description
Technical Field
The invention belongs to the technical field of composite material manufacturing, relates to a preparation method and a product of a wind power blade recycle reinforced wood-plastic composite material, and in particular relates to a preparation method and a product of a waste wind power blade reinforced polyolefin-based wood-plastic composite material.
Background
The rapid development of the Chinese wind power industry is about to face the challenges of retirement of large-scale wind power blades, and the harmless treatment, high-value utilization and resource utilization of the waste wind power blades become key problems of sustainable development of the wind power industry. At present, the main components of the retired wind power blade are epoxy resin and glass fiber, and meanwhile, the retired wind power blade also contains a small amount of materials such as metal, bassal wood, foam and the like. However, since epoxy resin is a thermosetting material, recycling and reuse are difficult to achieve. Worldwide, the main waste wind power blade recycling technologies include physical recycling, heat recycling and chemical recycling. The heat recovery equipment has high cost and is easy to generate toxic and harmful waste gas; high chemical recovery energy consumption and large solvent consumption. Therefore, these techniques are difficult to industrialize, and physical recycling has a greater industrialization potential. However, due to the limitation of recycling process, only cured epoxy resin powder and glass fiber staple containing cured epoxy resin (purity 60-90%) are obtained by cutting, pulverizing, grinding and the like, and the obtained material is often only used for low-value materials. The application field and the performance of the recycled materials are limited, how the waste wind power blades are utilized in a harmless and high-valued mode is greatly influenced, and the sustainable development of the wind power industry is greatly influenced.
On the other hand, polyolefin is widely used in daily life as a general-purpose plastic. In order to increase the strength of the polyolefin, glass fibers are generally added to the plastic. However, the fiber components in the recovered wind power blade are not pure, and the materials have many defects in the mechanical recovery process, so that the reinforcing effect of the recovered fibers on the polyolefin is poor, and the industrial application of the recovered fibers is further hindered. Therefore, how to carry out material modification and process improvement on the waste wind power blade, thereby greatly improving the performance of the composite material, and applying the composite material to the higher-end field becomes a key problem of whether the waste wind power blade can realize high-value application.
The wood-plastic composite material is an innovative material prepared by using waste thermoplastic plastics, biomass fibers and various assistants through processes of extrusion, injection molding, hot pressing and the like. The method is mainly applied to the fields of indoor and outdoor decoration, landscape architecture and the like. Because the selling price and the added value of the wood-plastic composite material are relatively high, the high-value utilization of the waste wind power blade in the field of the wood-plastic composite material is considered as one of potential approaches. However, as the fiber components recovered by the waste wind power blades are not pure, the materials have a plurality of defects in the mechanical recovery process, and the reinforcing effect on the wood-plastic composite material is not obvious. In addition, the cost of the recycling process is higher than that of the existing wood-plastic composite material formula system, so that the industrialization is adversely affected. Therefore, how to carry out material modification and process improvement on the waste wind power blade greatly improves the strength of the wood-plastic composite material, so that the waste wind power blade can be applied to the field of higher ends, and the method becomes a key problem of whether the waste wind power blade can be applied to the high-valued application of the wood-plastic composite material.
The lack of related technologies in the prior art serves as references, and a new technical scheme is necessary to be provided to solve the problem of resource utilization of waste wind power blades in the field of wood-plastic composite materials, and to make a contribution to sustainable development of the wind power industry and the wood-plastic composite material industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a waste wind power blade reinforced polyolefin-based wood plastic which overcomes the defects of the prior material, has more reasonable process and better product performance, and can effectively utilize wind power blade recycled fibers, and a preparation method thereof.
The technical scheme adopted by the invention is as follows: the preparation method of the wind power blade recovery reinforced wood-plastic composite material comprises the following steps: s1: modifying the wind power blade recovery resin through a low-temperature plasma treatment process by using a low-temperature plasma treatment machine to obtain modified wind power blade recovery resin; s2: compounding the wind power blade recovery fiber with polyolefin, and granulating to obtain wind power blade recovery fiber reinforced polyolefin master batch; s3: mixing the modified wind power blade recovery resin prepared in the step S1 and the wind power blade recovery fiber reinforced polyolefin master batch prepared in the step S2 with one or more of polyolefin and/or maleic anhydride grafted polyolefin, biomass fiber, antioxidant, anti-aging agent, ultraviolet resistant agent, calcium carbonate, lubricant and pigment, mixing auxiliary agents, granulating, and extruding to form to obtain the waste wind power blade recovery fiber reinforced polyolefin-based wood-plastic composite material.
As a further improvement of the method, the wind power blade recovery resin in the step S1 is formed by cutting, crushing, grinding, sieving and other mechanical processing of waste wind power blades, and the main component of the wind power blade recovery resin is cured epoxy resin; the polyolefin in the step S2 is one or two of PE and PP; the maleic anhydride grafted polyolefin in the step S3 is one or two of MAPE and MAPP; the biomass fiber in the step S3 is one or more of wood processing residual fiber, bamboo fiber and straw fiber.
As a further improvement of the above method, in the granulating process in the step S2, one or more ultrasonic devices are provided on the cylinder of the granulating device, and/or in the extrusion molding step in the step S3, one or more ultrasonic devices are provided on the cylinder of the extruding device.
As a further improvement of the above method, the preparation of the wind power blade recycled fiber reinforced polyolefin master batch in step S2 has the steps of:
s2.1: modifying the wind power blade recycled fiber by a low-temperature plasma treatment process to obtain a material A;
s2.2: preparing absolute ethyl alcohol and distilled water into a solution B, and adding a silane coupling agent into the solution B to prepare a solution C;
s2.3: placing the material A in the solution C, soaking the material A in the solution C, and performing a storage process treatment;
s2.4: the material treated in the step S2.3 is further placed in drying equipment for drying to obtain a material D;
s2.5: carrying out low-temperature plasma treatment process modification on the material D to obtain a material E;
s2.6: dissolving DCP in an acetone solution to obtain a solution F;
s2.7: spraying the solution F into the material E, and uniformly stirring to obtain a material G;
s2.8: dissolving DCP and MAH in an acetone solution to obtain a solution H;
s2.9: spraying the solution H into polyolefin, and uniformly stirring to obtain a material I;
s2.10: granulating the material G and the material I by a granulator to obtain the wind power blade recycled fiber reinforced polyolefin master batch.
As a further improvement of the method, the wind power blade recovery fiber in the step S2.1 is a mechanical processing recovery product of the waste wind power blade, and the mechanical processing comprises one or more of a cutting step, a tearing step, an impact step, an extrusion step, a hammering step, a grinding step and a sieving step.
As a further improvement of the method, the wind power blade recovery fiber in the step S2.1 comprises 60-90 parts by weight of glass fiber and 10-40 parts by weight of cured epoxy resin powder, and the epoxy resin powder is randomly distributed and attached to the surface of the glass fiber.
As a further improvement of the above method, the silane coupling agent in the step S2.2 is one or more of silane coupling agents having an amino functional group or a vinyl functional group.
As a further improvement of the above method, the silane coupling agent is KH550 silane coupling agent and/or KH151 silane coupling agent.
As a further improvement of the above process, the mass ratio of DCP contained in the solution F of step S2.7 to the mass of the material E is less than 1:100; the mass ratio of DCP to polyolefin contained in the solution H of the step S2.9 is 1:1000 to 1: in the range of 100; the mass ratio of MAH to polyolefin contained in the solution H of step S2.9 is 1:200 to 1: 20.
The invention also provides a technical scheme of the wind power blade recovery reinforced wood-plastic composite product, which adopts any one of the methods in the technical scheme to prepare the wood-plastic composite product.
As a further improvement of the product, the weight part of the recycled resin in the raw materials of the product is 5-20 parts; the wind power blade recycled fiber reinforced polyolefin master batch comprises the following components in parts by weight: 5-30 parts; the polyolefin comprises the following components in parts by weight: 0-30 parts; the maleic anhydride grafted polyolefin comprises the following components in parts by weight: 3-15 parts; the biomass fiber comprises the following components in parts by weight: 20-60 parts of a lubricant; the weight portion of other auxiliary agent is 2-20 portions.
The beneficial effects of the invention are as follows:
1. in the recovery process of the waste wind power blade, two recovery materials of recovered fibers and recovered resin are mainly produced. However, the industrialization and high-value utilization of these recycled materials are difficult, and the mechanism of difficult recycling is not fully disclosed and revealed by the related academic research. The effect of reinforcing wood plastic by using glass fiber is not obvious at present, and one of the main reasons is that in the method of granulating and extruding after mixing various materials such as glass fiber, biomass fiber, polyolefin and the like, part of the glass fiber is not completely infiltrated into the polyolefin due to the existence of the biomass fiber, so that the reinforcing performance is influenced. The invention is based on the research and discovery of the inventor in the field of fiber reinforcement of wood-plastic composite materials, adopts a method for improving the existing preparation process of reinforcing master batches as a starting point in order to fully play the reinforcing effect of the recycled fibers, and searches for a better fiber dispersion technology when preparing the reinforcing master batches so as to ensure that glass fibers can fully infiltrate with polyolefin, thereby improving the reinforcing effect. Based on the research of the inventor, a new material formula system is developed, and the proportion and compatibility of glass fiber, biomass fiber, polyolefin and other materials are optimized, so that the glass fiber, the biomass fiber, the polyolefin and other materials are better fused together, and complementary advantages are exerted. The waste wind power blade recovery fibers which are difficult to utilize are prepared into the reinforced master batch, so that the reinforced master batch can be uniformly dispersed in the polyolefin resin, the recovery fibers and the recovery resin can be better utilized, and the overall performance and the use value of the wood-plastic composite material can be improved. The problem that the effect of recycling the glass fiber reinforced wood-plastic composite material of the waste wind power blade is not obvious is successfully solved, and the high-valued application of the waste wind power blade is promoted.
2. In the curing process of the epoxy resin, a large number of active groups such as hydroxyl groups, epoxy groups and the like participate in the reaction, so that the active groups of the cured epoxy resin are fewer. In order to realize good interface bonding between the cured epoxy resin and the polyolefin, the method of the invention can increase a large number of active groups such as hydroxyl groups, carbonyl groups, carboxyl groups and the like on the surface of the epoxy resin attached to the recycled fiber by performing low-temperature plasma treatment on the recycled fiber. The active groups can be subjected to chemical reaction or hydrogen bonding with a silane coupling agent and maleic anhydride grafted polyolefin, and meanwhile, the surface of the epoxy resin can be etched to form grooves, so that the specific surface area is increased, and the adhesive force is further improved.
3. In the wood-shaping process, the movement of the material is exacerbated by the use of ultrasonic vibrations, thereby increasing the chance of microcontact. The method ensures that the maleic anhydride groups in the reinforced master batch can react with the hydroxyl groups in the wood powder and the recycled resin more fully, thereby improving the interfacial compatibility between the wood powder and the recycled resin and effectively improving the strength and the performance of the wood-plastic composite material. In addition, the ultrasonic vibration is also helpful for the dispersion of the recycled fibers, and the occurrence of agglomeration phenomenon is avoided. By introducing ultrasonic vibration, the material moves more strongly in the granulating process, and more contact occurs between the components, so that the reaction efficiency is improved. Meanwhile, the ultrasonic vibration can also effectively solve the dispersion problem of the recycled fibers. By the action of ultrasonic vibration, the aggregation phenomenon easily generated by the recycled fiber in the preparation process is avoided, the uniformity and quality of the material are improved, and the performance and usability of the material are further improved.
4. Furthermore, through the granulation process, active groups of all components of the wood plastic do not react by 100%, so that the reaction probability of the active groups can be further increased by continuously using ultrasonic vibration in the wood plastic extrusion process, the reaction is more complete, and the interface compatibility is better. And the ultrasonic vibration is beneficial to the dispersion of the recovered fibers, and the recovered fibers are prevented from agglomerating under the action of the strong shearing screw.
5. In the process of recycling waste wind power blades, part of epoxy resin is peeled off from the surface of glass fiber through mechanical actions such as crushing and grinding, and other epoxy resins adhere to the surface of glass fiber, but the mechanical actions cause serious interface damage and connection weakness, which greatly cause more defects of the prepared composite material, and the mechanical properties of the composite material are reduced, so that the problem is solved by the existing technical field of fiber recycling. The invention can effectively enhance the adhesive force between the recycled fiber and the matrix of the composite material, thereby improving the structural strength and durability of the composite material, being beneficial to overcoming the problems of interface damage and connection weakness in the recycling process and being beneficial to preparing the composite material with higher performance.
6. In the invention, after the recovered fibers of the waste wind power blades are treated by KH550 and/or KH151 coupling agents, the coupling agents can generate silanol in the hydrolysis process and then react with the glass fibers of the recovered fibers and hydroxyl groups on the surface of the cured epoxy resin to form a silicon-oxygen covalent bond. By such treatment, the interfacial bond between the glass fibers and the cured epoxy resin can be improved on the one hand; on the other hand, amino groups in the KH550 silane coupling agent can react with maleic anhydride groups on polyolefin molecular chains, and vinyl groups in the KH151 coupling agent can perform free radical polymerization reaction with polyolefin molecular chains under the action of DCP, and the reactions can further improve interface bonding among glass fibers, cured epoxy resin and polyolefin, so that the performance of the composite material is improved.
7. After the silane coupling agent treatment, most of the hydroxyl groups of the epoxy resin on the recycled fiber have reacted with the silane coupling agent. In order to further improve the interfacial properties of the material, the present invention provides a plurality of steps of low temperature plasma treatment. The treatment can introduce more hydroxyl, carboxyl and other active groups on the surface of the epoxy resin, thereby increasing the chance and probability of chemical reaction with maleic anhydride grafted polyolefin. By the treatment method, the chemical reaction between the recycled fiber and the composite material matrix is more sufficient, the chemical interaction probability between the recycled fiber and the polymer matrix is further increased, the interface bonding capacity is enhanced, and the bonding strength and stability of the interface are improved.
8. In order to ensure that the vinyl groups in KH151 react rapidly with the polyolefin, the present invention fully considers the premature depletion of DCP in material I due to the in situ grafting reaction. By adding a proper amount of DCP into the material E, more free radicals are generated, so that the effective combination of vinyl and polyolefin in KH151 is ensured.
9. The invention grafts maleic anhydride group on the polyolefin surface through the in-situ grafting reaction of DCP and MAH.
10. It is generally considered that the ultrasonic wave has no obvious influence on the preparation process of the composite material, but the ultrasonic device arranged between the main feeding port of the granulator and the side feeding machine can play a role in improving the chemical reaction process of the polyolefin, and the free radical content is increased under the vibration effect of the ultrasonic wave, so that the movement of polyolefin molecular chains is promoted. Thus, more Maleic Anhydride (MAH) can be successfully grafted onto the polyolefin molecular chain under the influence of the present invention, thereby improving the in-situ grafting rate.
11. According to the invention, an ultrasonic device is arranged between the side feeder and the die of the granulator, the free radical content is increased by ultrasonic vibration, the movement of polyolefin molecular chains is accelerated, more covalent bonds are formed between vinyl functional groups on KH151 coupling agent and polyolefin, the probability of reaction between amino functional groups on KH550 and maleic anhydride groups on in-situ grafted polyolefin is increased, more amide covalent bonds are formed, and the reaction contact points of epoxy resin, glass fiber and polyolefin molecular chains are greatly increased, so that the interfacial compatibility of the three components is greatly improved. In addition, the ultrasonic vibration is beneficial to the dispersion of glass fibers and reduces the probability of glass fiber aggregation, so that the function of the fiber reinforced thermoplastic resin can be played.
In conclusion, through modification treatment of low-temperature plasma and silane coupling agent, active groups in the wind power blade recovery fiber are greatly increased, through in-situ grafting modification and ultrasonic vibration, the mutual interface compatibility of glass fiber, cured epoxy resin and polyolefin in the wind power blade recovery fiber is greatly improved, and the dispersibility of the recovery fiber in the polyolefin is improved, so that the wind power blade recovery fiber reinforced polyolefin master batch is prepared, and the recovered waste wind power blade can be utilized in a high value. The low-temperature plasma treatment is carried out on the recycled resin of the wind power blade, and an ultrasonic device is added on the granulating and extruding equipment of the wood plastic, so that the mechanical property of the wood plastic composite material is greatly improved, the application field of the wood plastic is widened, and the recycled waste wind power blade can be utilized in a high-value manner.
Drawings
FIG. 1 is a schematic flow chart of a method for preparing a wind power blade recycle enhanced wood-plastic composite material.
Detailed Description
In order to more clearly describe the technical solution in the embodiments of the present invention, the following description will simply describe the embodiments. It is apparent that only some embodiments, but not all embodiments, of the present invention have been described, and that those skilled in the art may obtain other designs from the flow diagrams without the exercise of inventive faculty.
A preparation method of a wind power blade recovery reinforced wood-plastic composite material comprises the following steps of S1: modifying the wind power blade recovery resin through a low-temperature plasma treatment process by using a low-temperature plasma treatment machine to obtain modified wind power blade recovery resin; s2: compounding the wind power blade recovery fiber with polyolefin, and granulating to obtain wind power blade recovery fiber reinforced polyolefin master batch; s3: and (3) mixing, granulating and extruding the modified wind power blade recovery resin prepared in the step (S1) and the wind power blade recovery fiber reinforced polyolefin master batch prepared in the step (S2) with polyolefin and/or maleic anhydride grafted polyolefin, biomass fiber and other auxiliary agents to prepare the waste wind power blade recovery fiber reinforced polyolefin-based wood-plastic composite material. The beneficial effects of this embodiment are: when the epoxy resin is cured, a large number of active groups such as hydroxyl groups, epoxy groups and the like participate in the reaction, so that the cured epoxy resin has fewer active groups. In order to enable the cured epoxy resin and the polyolefin to form good interface combination, the recycled material is subjected to low-temperature plasma treatment, so that a large number of active groups such as hydroxyl groups are added on the surface of the cured epoxy resin, the active groups can react with the silane coupling agent and the maleic anhydride grafted polyolefin, and meanwhile, the surface of the cured epoxy resin is etched to form grooves, the specific surface area is increased, the adhesive force is improved, and then the wood-plastic composite material with higher performance is prepared.
As a further improvement of the method, the wind power blade recovery resin in the step S1 is formed by cutting, crushing, grinding, sieving and other mechanical processing of waste wind power blades, and the main component of the wind power blade recovery resin is cured epoxy resin; the polyolefin in the step S2 is one or two of PE and PP; the maleic anhydride grafted polyolefin in the step S3 is one or two of MAPE and MAPP; the biomass fiber in the step S3 is one or more of wood processing residual fiber, bamboo fiber and straw fiber; the other auxiliary agents in the step S3 are one or more of antioxidants, ultraviolet resistant agents, calcium carbonate, talcum powder, pigments and lubricants. The beneficial effects of this embodiment are: a new material formula system is developed, the proportion and compatibility of glass fiber, biomass fiber, polyolefin and other materials are optimized, so that the glass fiber, the biomass fiber, the polyolefin and other materials are better fused together, and complementary advantages are exerted.
As a further improvement of the above method, in the granulating process in the step S2, one or more ultrasonic devices are provided on the cylinder of the granulating device, or in the extrusion molding step in the step S3, one or more ultrasonic devices are provided on the cylinder of the extruding device. The beneficial effects of this embodiment are: after the ultrasonic device is arranged, the content of free radicals is increased by ultrasonic vibration, so that the movement of polyolefin molecular chains is accelerated, more MAH is grafted onto the polyolefin molecular chains, and the in-situ grafting rate is increased. And the DCP initiator of the maleic anhydride and polyolefin materials can be prevented from being consumed in advance, so that the decomposition of DCP in the recycled fiber is better promoted, and the KH151 vinyl polyolefin reaction is initiated.
As a further improvement of the above method, the preparation of the wind power blade recycled fiber reinforced polyolefin master batch in step S2 has the steps of: s2.1: modifying the wind power blade recycled fiber by a low-temperature plasma treatment process to obtain a material A; s2.2: preparing absolute ethyl alcohol and distilled water into a solution B, and adding a silane coupling agent into the solution B to prepare a solution C; s2.3: placing the material A in the solution C, soaking the material A in the solution C, and performing a storage process treatment; s2.4: the material treated in the step S3 is further placed in drying equipment for drying to obtain a material D; s2.5: carrying out low-temperature plasma treatment process modification on the material D to obtain a material E; s2.6: dissolving DCP in an acetone solution to obtain a solution F; s2.7: spraying the solution F into the material E, and uniformly stirring to obtain a material G; s2.8: dissolving DCP and MAH in an acetone solution to obtain a solution H; s2.9: spraying the solution H into polyolefin, and uniformly stirring to obtain a material I; s2.10: granulating the material G and the material I by a granulator to obtain the wind power blade recycled fiber reinforced polyolefin master batch. The beneficial effects of this embodiment are: the method provides a more reasonable manufacturing process of the composite material, is favorable for overcoming the defect of insufficient performance of the cured epoxy resin powder and the glass fiber short fiber containing the cured epoxy resin in the prior art when the cured epoxy resin powder and the glass fiber short fiber are used for preparing the composite material, can lead the performance of a composite product to be better, and provides the wind power blade recovery fiber reinforced polyolefin master batch which can effectively utilize wind power blade recovery fibers, thereby promoting the smooth preparation of the high-performance wood-plastic composite material.
As a further improvement of the above method, the wind power blade recovery fiber in the step S2.1 is a mechanical processing recovery product of the waste wind power blade, and the mechanical processing includes a cutting step, a tearing step, an impact step, an extrusion step, a hammering step, a grinding step, and a sieving step. The beneficial effects of this embodiment are: through the mechanical processing of the steps, the recycled material of the fan blade can be fully decomposed into a resin part and a fiber part, which is more beneficial to high-efficiency utilization and production of high-quality wood-plastic composite materials.
As a further improvement of the above method, the silane coupling agent in the step S2.2 is one or more of silane coupling agents with amino functional groups or vinyl functional groups, and preferably the silane coupling agent is KH550 silane coupling agent and/or KH151 silane coupling agent. The beneficial effects of this embodiment are: in the process of recycling the waste wind power blades, part of epoxy resin is peeled off from the surface of the glass fiber through mechanical actions such as crushing, grinding and the like, and part of epoxy resin is adhered to the surface of the glass fiber, but the mechanical actions cause severe damage to the interface between the epoxy resin and the glass fiber and more connection weaknesses. This results in increased defects and reduced mechanical properties of the composite material produced. After the recycled fiber is treated by the silane coupling agent, most of hydroxyl groups of the epoxy resin on the recycled fiber react with the silane coupling agent. The low-temperature plasma treatment is performed again to increase active groups such as hydroxyl, carboxyl and the like on the surface of the epoxy resin, so that the probability of chemical reaction with maleic anhydride grafted polyolefin is increased. KH550 and KH151 coupling agent are hydrolyzed into silanol, and react with glass fiber of waste wind power blade recovery fiber and hydroxyl on the surface of epoxy resin to form a silica-silica covalent bond, so that on one hand, the interface combination of glass fiber and epoxy resin can be improved, on the other hand, amino group of KH550 silane coupling agent can react with maleic anhydride group on polyolefin molecular chain, vinyl group of KH151 coupling agent can react with polyolefin, so that the interface combination of glass fiber, epoxy resin and polyolefin can be improved.
As a further improvement of the method, the step S2.7 DCP accounts for 0.1% -1% of the mass of the material E. The beneficial effects of this embodiment are: the DCP in the material I is possibly consumed prematurely, and the DCP is added into the material E to generate free radicals, so that the vinyl energy of KH151 and polyolefin can be ensured to react chemically.
As a further improvement of the above method, in the solution H in the step S2.9, DCP accounts for 0.1% -1% of the mass fraction of polyolefin, MAH accounts for 0.5% -5% of the mass fraction of polyolefin, and the polyolefin is one or both of PE and PP. The beneficial effects of this embodiment are: the maleic anhydride groups are grafted on the surface of the polyolefin through in-situ grafting reaction of DCP and MAH.
The wind power blade recycle enhanced wood-plastic composite material product adopts any one of the methods, and the weight part of recycled resin in the raw materials of the product is 5-20 parts; the wind power blade recycled fiber reinforced polyolefin master batch comprises the following components in parts by weight: 5-30 parts; the polyolefin comprises the following components in parts by weight: 0-30 parts; the maleic anhydride grafted polyolefin comprises the following components in parts by weight: 3-15 parts; the biomass fiber comprises the following components in parts by weight: 20-60 parts of a lubricant; the weight portion of other auxiliary agent is 2-20 portions.
According to the invention, through modification treatment of low-temperature plasma and silane coupling agent, active groups in the wind power blade recovery fiber are greatly increased, and through in-situ grafting modification and ultrasonic vibration, the mutual interface compatibility of glass fiber, cured epoxy resin and polyolefin in the wind power blade recovery fiber is greatly improved, and the dispersibility of the recovery fiber in polyolefin is improved, so that the wind power blade recovery fiber reinforced polyolefin master batch is prepared. The low-temperature plasma treatment is carried out on the recycled resin of the wind power blade, and an ultrasonic device is added on the granulating and extruding equipment of the wood plastic, so that the mechanical property of the wood plastic composite material is greatly improved, the application field of the wood plastic is widened, and the recycled waste wind power blade can be utilized in a high-value manner.
Claims (10)
1. The preparation method of the wind power blade recovery reinforced wood-plastic composite material is characterized by comprising the following steps of:
s1: modifying the wind power blade recovery resin through a low-temperature plasma treatment process by using a low-temperature plasma treatment machine to obtain modified wind power blade recovery resin;
s2: compounding the wind power blade recovery fiber with polyolefin, and granulating to obtain wind power blade recovery fiber reinforced polyolefin master batch;
s3: mixing the modified wind power blade recovery resin prepared in the step S1 and the wind power blade recovery fiber reinforced polyolefin master batch prepared in the step S2 with polyolefin and/or maleic anhydride grafted polyolefin and biomass fiber, adding one or more of antioxidant, anti-aging agent, anti-ultraviolet agent, calcium carbonate, lubricant and pigment, mixing, granulating, and extruding to obtain the waste wind power blade recovery fiber reinforced polyolefin-based wood-plastic composite material.
2. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 1, which is characterized by comprising the following steps: the wind power blade recovery resin in the step S1 is formed by cutting, crushing, grinding, screening and other mechanical processing of waste wind power blades, and the main component of the wind power blade recovery resin is cured epoxy resin; the polyolefin in the step S2 is one or two of PE and PP; the maleic anhydride grafted polyolefin in the step S3 is one or two of MAPE and MAPP; the biomass fiber in the step S3 is one or more of wood processing residual fiber, bamboo fiber and straw fiber.
3. The method according to claim 1, wherein in the granulating process in step S2, one or more ultrasonic devices are disposed on a barrel of the granulating device, and/or in the extrusion molding step in step S3, one or more ultrasonic devices are disposed on a barrel of the extruding device.
4. A method for producing a wind power blade recovery reinforced wood-plastic composite according to any one of claims 1 to 3, characterized by: in the step S2, the wind power blade recycled fiber reinforced polyolefin master batch is prepared, and the method comprises the following steps of:
s2.1: modifying the wind power blade recycled fiber by a low-temperature plasma treatment process to obtain a material A;
s2.2: preparing absolute ethyl alcohol and distilled water into a solution B, and adding a silane coupling agent into the solution B to prepare a solution C;
s2.3: placing the material A in the solution C, soaking the material A in the solution C, and performing a storage process treatment;
s2.4: the material treated in the step S2.3 is further placed in drying equipment for drying to obtain a material D;
s2.5: carrying out low-temperature plasma treatment process modification on the material D to obtain a material E;
s2.6: dissolving DCP in an acetone solution to obtain a solution F;
s2.7: spraying the solution F into the material E, and uniformly stirring to obtain a material G;
s2.8: dissolving DCP and MAH in an acetone solution to obtain a solution H;
s2.9: spraying the solution H into polyolefin, and uniformly stirring to obtain a material I;
s2.10: granulating the material G and the material I by a granulator to obtain the wind power blade recycled fiber reinforced polyolefin master batch.
5. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 4, wherein the wind power blade recovery fiber in the step S2.1 is a mechanical processing recovery product of a waste wind power blade, and the mechanical processing comprises one or more of a cutting step, a tearing step, an impact step, an extrusion step, a hammering step, a grinding step and a sieving step.
6. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 4, wherein the wind power blade recovery fiber in the step S2.1 comprises 60-90 parts by weight of glass fiber and 10-40 parts by weight of cured epoxy resin powder, and the epoxy resin powder is irregularly distributed and attached to the surface of the glass fiber.
7. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 4, wherein the silane coupling agent in the step S2.2 is one or more silane coupling agents with amino functional groups or vinyl functional groups.
8. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 7, wherein the silane coupling agent is KH550 silane coupling agent and/or KH151 silane coupling agent.
9. The method for preparing the wind power blade recovery reinforced wood-plastic composite material according to claim 4, wherein the mass ratio of DCP contained in the solution F in the step S2.7 to the mass ratio of the material E is less than 1:100; the mass ratio of DCP to polyolefin contained in the solution H of the step S2.9 is 1:1000 to 1: in the range of 100; the mass ratio of MAH to polyolefin contained in the solution H of step S2.9 is 1:200 to 1: 20.
10. The utility model provides a wind-powered electricity generation blade recovery thing reinforcing wood plastic composite goods which characterized in that: the method as claimed in any one of claims 1 to 9, wherein the weight fraction of the recycled resin in the raw material of the product is 5 to 20 parts; the wind power blade recycled fiber reinforced polyolefin master batch comprises the following components in parts by weight: 5-30 parts; the polyolefin comprises the following components in parts by weight: 0-30 parts; the maleic anhydride grafted polyolefin comprises the following components in parts by weight: 3-15 parts; the biomass fiber comprises the following components in parts by weight: 20-60 parts.
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