Environment-friendly composite material as well as preparation method and application thereof

Abstract

The invention discloses an environment-friendly composite material as well as a preparation method and application thereof. The composite material comprises the following components: a high polymer material; modifying plant fibers; a filler; an auxiliary agent; the modified plant fiber is prepared from the following raw materials: plant fiber, an amine compound, a silane coupling agent, titanate and silicon dioxide; the polymer resin comprises at least one of polypropylene, poly (butylene succinate) and polyethylene. The composite material disclosed by the invention is a composite material with high stability and adhesive force.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer materials, and in particular to an environmentally friendly composite material and a manufacturing method and application thereof. Background Art

[0002] With the increasing global environmental awareness and the concept of sustainable development, the demand for environmentally friendly materials has become more urgent, especially in daily necessities. Plastic, as one of the most common industrial materials, has long been widely used due to its good physical properties and cost advantages. However, traditional plastic materials such as polypropylene not only cause waste of resources during production and use, but also bring environmental pollution problems, especially in the treatment of waste, the poor degradation of plastics has caused a huge burden on the ecological environment. Therefore, the development of degradable alternative materials has become an important direction of current materials science research. In this context, plant fiber, as a natural, renewable and environmentally friendly material, has received widespread attention, especially in plastic alternatives, the application of plant fiber is gradually expanding.

[0003] As a natural fiber, plant fiber has many advantages such as wide sources, renewable, and environmentally friendly. Compared with traditional petroleum-based resins, plant fiber can not only effectively reduce carbon emissions, but also reduce dependence on petroleum resources. The high proportion of plant fiber composite materials can effectively improve the environmental performance of products, reduce pollution, and meet the needs of green development and sustainable development. The main components of plant fiber are cellulose, lignin, and hemicellulose, which give plant fibers good strength and elasticity, so they are outstanding in enhancing the mechanical properties of plastic composites. Especially in daily consumer products, plant fiber composite materials are gradually replacing traditional plastic materials and becoming an ideal environmentally friendly choice.

[0004] However, although plant fiber-filled polypropylene materials have many advantages, especially in terms of environmental friendliness and mechanical properties, they also face some technical challenges in practical applications. These challenges are particularly evident when developing ultra-high-content plant fiber-filled polypropylene composites. First, plant fibers themselves have poor heat resistance and are easily degraded or deformed in high-temperature environments, which places higher requirements on their application in high-temperature processing. Secondly, plant fibers are easy to absorb water, which may cause their physical properties to decrease in a humid environment, and during processing, plant fibers with strong hygroscopicity will affect the stability of the composite material. In addition, the surface characteristics of plant fibers are relatively complex, and the interaction force between fibers is weak, which can easily cause problems such as poor dispersion and poor fluidity, which places higher requirements on the processing technology of composite materials. In the case of high-filled plant fibers, these problems are particularly prominent and require special technical means to solve.

[0005] In order to overcome these technical difficulties, researchers have adopted a variety of methods to improve the processing performance and final performance of plant fiber-filled polypropylene materials. First, the modification of the fiber surface has become a key step in improving the performance of composite materials. By chemically modifying or physically treating the surface of plant fibers, the interfacial bonding between the fibers and the polypropylene matrix can be improved, its dispersion can be improved, and the aggregation phenomenon between fibers can be reduced, thereby improving the mechanical properties and processing properties of the composite material. Common surface treatment methods include acid and alkali treatment, heat treatment, surface coating, etc. These methods can effectively improve the affinity of plant fibers and enhance their dispersion in the polypropylene matrix.

[0006] In addition to fiber surface treatment, the use of low-emission raw materials and special processing technology are also important measures to improve the performance of high-filled plant fiber composites. The use of low-emission raw materials can effectively reduce the release of harmful substances during the processing process and ensure the environmental friendliness of the materials during the processing. In addition, in terms of processing technology, researchers have adopted advanced technologies such as multi-stage vacuum systems and low-temperature blending technology. By controlling the temperature and pressure conditions during the processing, the thermal degradation of plant fibers can be avoided to the greatest extent, maintaining their natural properties while reducing the negative impact on the environment. These technical means can improve the processing performance and environmental performance of plant fiber composites while ensuring the mechanical properties of plant fiber composites.

[0007] In practical applications, ultra-high content plant fiber filled polypropylene composites have been widely used in many fields, especially in cosmetics and daily consumer goods. The application of plant fiber composites is of great significance in the manufacturing process of makeup brushes. Traditional makeup brushes usually use synthetic fibers or animal hair as bristle materials, which may produce a lot of environmental pollution during the production process and are often unable to degrade after use. In contrast, plant fibers, as natural materials, have good degradability and can effectively reduce the environmental burden of makeup brushes after use. Therefore, the use of plant fiber filled polypropylene composites to make makeup brushes can not only improve the physical properties of the bristles, but also improve the environmental friendliness of the product, which meets the current consumer demand for green and sustainable products.

[0008] However, despite the broad application prospects of plant fiber-filled polypropylene composites in cosmetic brushes, they still face certain challenges in actual production. Especially when highly filled with plant fibers, the surface treatment and process control of the material become more complicated. After ultra-high filling of plant fibers, the fluidity and molding properties of the composite material are often greatly affected, resulting in an increase in defects in the molding process, such as bubbles and cracks. Therefore, in order to ensure product quality, more sophisticated process control and optimized molding parameters must be adopted. In this process, after the composite material is prepared into a cosmetic brush, the adhesion problem between the cosmetic brush product and the coating also needs to be paid special attention. Due to the unevenness of the plant fiber surface and the incompatibility with the polymer material, after the product is prepared, there is an unstable adhesion problem between the product and the coating or printing layer, which affects the appearance and performance of the product. To this end, the use of appropriate surface treatment and modification technology to improve the adhesion of the composite material, thereby improving the adhesion of the product after the composite material is prepared as a cosmetic brush, has become the key to solving this problem. Summary of the invention

[0009] The object of the present invention is to provide a highly filled plant fiber composite material with high stability and adhesion.

[0010] A first aspect of the present invention is:

[0011] A composite material is provided.

[0012] A second aspect of the present invention is:

[0013] Provided is a method for preparing a composite material.

[0014] The third aspect of the present invention is:

[0015] Application of the composite material.

[0016] The invention also provides a cosmetic brush handle.

[0017] Specifically, the technical solution adopted according to the first aspect of the present invention is:

[0018] A composite material comprising the following components:

[0019] Polymer resin;

[0020] modified plant fibers;

[0021] filler;

[0022] Additives;

[0023] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide;

[0024] The polymer resin includes at least one of polypropylene, polybutylene succinate and polyethylene.

[0025] According to the embodiments of the present invention, one of the technical solutions has at least one of the following advantages or beneficial effects:

[0026] Polymer resins are not easily wetted by liquids. Plant fibers are usually hydrophilic polar materials. There is a significant difference in polarity between the two, resulting in poor compatibility. There is a difference in surface energy between polypropylene and plant fiber, which affects their bonding with other materials (such as spray paint, electroplating layer materials, and silk-screen printing inks). Based on this, the present invention modifies the plant fiber, promotes the good bonding of silica, titanate and plant fiber through a silane coupling agent, and the reaction between the amino group in the silane coupling agent and the hydroxyl group on the surface of the plant fiber improves the surface chemical properties of the fiber, enhances its bonding with other components, and facilitates the subsequent bonding with amine compounds; wherein silica can improve the thermal stability of the composite material; wherein the titanate surface has strong chemical activity and good interface adhesion, and can interact with the polypropylene molecular chain, thereby enhancing the bonding between the modified plant fiber and the polypropylene, and improving the overall stability of the composite material; the amino group of the amine compound forms a covalent bond or a hydrogen bond with the hydroxyl group on the fiber surface, which can improve the affinity of the composite fiber, and the characteristics of the amine compound can be better compatible with the hydrophobic characteristics of polypropylene, and enhance the adhesion of the composite fiber to the polypropylene matrix, so that the composite material of the present invention is a composite material with high stability and adhesion.

[0027] According to one embodiment of the present invention, the polypropylene is at least one of 100% recycled polypropylene, PBS and bio-based PE.

[0028] According to one embodiment of the present invention, the silane coupling agent is a coupling agent containing amino and vinyl functional groups. Since the silane coupling agent has good hydrophilicity and lipophilicity, it can further enhance the interfacial adhesion between silica and plant fibers.

[0029] According to one embodiment of the present invention, the composite material comprises the following components in parts by weight:

[0030] Polymer resin, 45-50 parts;

[0031] Modified plant fiber, 40-60 parts;

[0032] Filler, 5-14 parts.

[0033] According to one embodiment of the present invention, the composite material comprises the following components in parts by weight:

[0034] High molecular resin, 45-48 parts;

[0035] Modified plant fiber, 40-50 parts;

[0036] Filler, 5-10 parts.

[0037] According to one embodiment of the present invention, the composite material comprises the following components in parts by weight:

[0038] Polymer resin, 45-50 parts;

[0039] Modified plant fiber, 40-60 parts;

[0040] Filler, 5-14 parts;

[0041] Additives: 0.1-2 parts.

[0042] According to one embodiment of the present invention, the composite material comprises the following components in parts by weight:

[0043] Polymer resin, 45-50 parts;

[0044] Modified plant fiber, 40-60 parts;

[0045] Filler, 5-14 parts;

[0046] Antioxidant, 0.1-1 part;

[0047] Amide lubricant, 0.2-1 part.

[0048] According to one embodiment of the present invention, the filler includes at least one of calcium carbonate, titanium dioxide and graphene.

[0049] According to one embodiment of the present invention, the auxiliary agent includes at least one of an antioxidant and an amide lubricant.

[0050] According to one embodiment of the present invention, the method for preparing the modified plant fiber comprises the following steps: mixing silica, a silane coupling agent and a titanate in a solvent to obtain a suspension; immersing the plant fiber in the suspension, taking it out and then immersing it in a solution containing an amine compound, heating it, and obtaining the modified plant fiber.

[0051] According to one embodiment of the present invention, the amine compound includes at least one of trioctylamine, n-octylamine and dioctylamine.

[0052] According to one embodiment of the present invention, the components of the composite material also include an adhesive, and the preparation method of the adhesive includes the following steps: mixing kaolin, plant fiber, surfactant, cross-linking agent, and magnesium hydroxide in water to obtain a first solution; mixing di-tert-butyl peroxide in an organic solvent to obtain a second solution; mixing the first solution and the second solution, adjusting the pH to neutral, and obtaining the adhesive.

[0053] By additionally adding the adhesive of the present invention, the adhesion of the composite material can be greatly improved, and a composite material with good adhesion and stability is formed through the synergistic effect of kaolin, plant fiber, surfactant, crosslinking agent, magnesium hydroxide and di-tert-butyl peroxide. Kaolin and plant fiber provide a skeleton for enhancing mechanical properties for the adhesive, the surfactant improves the compatibility between different components, the crosslinking agent improves the strength and heat resistance of the adhesive through a crosslinking reaction, magnesium hydroxide provides a flame retardant function, and di-tert-butyl peroxide promotes the crosslinking process to ensure the curing of the adhesive.

[0054] According to one embodiment of the present invention, the surfactant includes at least one of cetyltrimethylammonium bromide and polyvinylpyrrolidone.

[0055] According to one embodiment of the present invention, the cross-linking agent includes at least one of methyltriethoxysilane and γ-aminopropyltriethoxysilane.

[0056] Specifically, the technical solution adopted according to the second aspect of the present invention is:

[0057] A method for preparing the composite material comprises the following steps:

[0058] The composite material is obtained by mixing high molecular resin, modified plant fiber, filler and auxiliary agent, extruding and granulating.

[0059] According to one embodiment of the present invention, the.

[0060] Another aspect of the present invention further provides a cosmetic brush handle, which includes the composite material as described in the first embodiment. Since the application adopts all the technical solutions of the composite material, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0061] According to one embodiment of the present invention, the preparation method further comprises the step of subjecting the cosmetic brush handle to corona treatment, plasma treatment or chemical reagent treatment.

[0062] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. DETAILED DESCRIPTION

[0063] When a numerical range is disclosed herein, the above range is considered to be continuous and includes the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Further, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe features or characteristics, the ranges can be combined. In other words, unless otherwise indicated, all ranges disclosed herein should be understood to include any and all subranges included therein.

[0064] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of the present invention.

[0065] Unless otherwise specified, the reagents, methods and equipment used in the present invention are conventional reagents, methods and equipment in the art.

[0066] Example 1

[0067] A composite material comprises the following components in parts by weight:

[0068] Polypropylene, 45 parts;

[0069] modified vegetable fiber, 50 parts;

[0070] Calcium carbonate, 5 parts;

[0071] Titanium dioxide, 4 parts;

[0072] Antioxidant, 0.2 parts;

[0073] Amide lubricant, 0.1 part;

[0074] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0075] The above-mentioned amine compound is dioctylamine;

[0076] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0077] The above titanate is calcium titanate;

[0078] The method for preparing the modified plant fiber comprises the following steps:

[0079] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0080] A method for preparing the above composite material comprises the following steps:

[0081] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0082] A method for preparing a cosmetic brush handle comprises the following steps:

[0083] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0084] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0085] Example 2

[0086] The difference between Example 2 and Example 1 is that an adhesive is further added to the composite material of Example 2.

[0087] Specific:

[0088] A composite material comprises the following components in parts by weight:

[0089] Polypropylene, 45 parts;

[0090] modified vegetable fiber, 50 parts;

[0091] Adhesive, 8 parts;

[0092] Calcium carbonate, 5 parts;

[0093] Titanium dioxide, 4 parts;

[0094] Antioxidant, 0.2 parts;

[0095] Amide lubricant, 0.1 part;

[0096] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0097] The above-mentioned amine compound is dioctylamine;

[0098] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0099] The above titanate is calcium titanate;

[0100] The method for preparing the modified plant fiber comprises the following steps:

[0101] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0102] The raw materials of the adhesive include: kaolin, plant fiber, surfactant, crosslinking agent, magnesium hydroxide and di-tert-butyl peroxide.

[0103] The above surfactant is hexadecyltrimethylammonium bromide;

[0104] The cross-linking agent is methyltriethoxysilane;

[0105] The preparation of the above adhesive comprises the following steps:

[0106] 70 parts of kaolin, 5 parts of plant fiber, 2 parts of surfactant, 2 parts of cross-linking agent, and 5 parts of magnesium hydroxide are mixed in 300 parts of water to obtain a first solution; 4 parts of di-tert-butyl peroxide are mixed with 16 parts of ethylene glycol to obtain a second solution; the first solution and the second solution are mixed, and the pH is adjusted to 7.0 to obtain the above-mentioned adhesive.

[0107] A method for preparing the above composite material comprises the following steps:

[0108] Polypropylene, modified plant fiber, adhesive, calcium carbonate, titanium dioxide, antioxidant and amide lubricant are mixed, extruded and granulated to obtain a composite material.

[0109] A method for preparing a cosmetic brush handle comprises the following steps:

[0110] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0111] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0112] Example 3

[0113] The difference between Example 3 and Example 1 is that the dosage of components is different.

[0114] Specific:

[0115] A composite material comprises the following components in parts by weight:

[0116] Polypropylene, 45 parts;

[0117] modified vegetable fiber, 55 parts;

[0118] Calcium carbonate, 5 parts;

[0119] Titanium dioxide, 4 parts;

[0120] Antioxidant, 0.2 parts;

[0121] Amide lubricant, 0.1 part;

[0122] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0123] The above-mentioned amine compound is dioctylamine;

[0124] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0125] The above titanate is calcium titanate;

[0126] The method for preparing the modified plant fiber comprises the following steps:

[0127] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0128] A method for preparing the above composite material comprises the following steps:

[0129] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0130] A method for preparing a cosmetic brush handle comprises the following steps:

[0131] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0132] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0133] Example 4

[0134] The difference between Example 4 and Example 1 is that the amounts of components are different.

[0135] Specific:

[0136] A composite material comprises the following components in parts by weight:

[0137] Polypropylene, 45 parts;

[0138] modified vegetable fiber, 55 parts;

[0139] Calcium carbonate, 3 parts;

[0140] Titanium dioxide, 4 parts;

[0141] Antioxidant, 0.2 parts;

[0142] Amide lubricant, 0.1 part;

[0143] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0144] The above-mentioned amine compound is dioctylamine;

[0145] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0146] The above titanate is calcium titanate;

[0147] The method for preparing the modified plant fiber comprises the following steps:

[0148] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0149] A method for preparing the above composite material comprises the following steps:

[0150] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0151] A method for preparing a cosmetic brush handle comprises the following steps:

[0152] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0153] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0154] Example 5

[0155] The difference between Example 5 and Example 1 is that the amounts of components are different.

[0156] Specific:

[0157] A composite material comprises the following components in parts by weight:

[0158] Polypropylene, 45 parts;

[0159] modified vegetable fiber, 60 parts;

[0160] Calcium carbonate, 2 parts;

[0161] Titanium dioxide, 4 parts;

[0162] Antioxidant, 0.1 part;

[0163] Amide lubricant, 0.1 part;

[0164] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0165] The above-mentioned amine compound is dioctylamine;

[0166] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0167] The above titanate is calcium titanate;

[0168] The method for preparing the modified plant fiber comprises the following steps:

[0169] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0170] A method for preparing the above composite material comprises the following steps:

[0171] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0172] A method for preparing a cosmetic brush handle comprises the following steps:

[0173] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0174] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0175] Example 6

[0176] The difference between Example 6 and Example 1 is that the amounts of components are different.

[0177] Specific:

[0178] A composite material comprises the following components in parts by weight:

[0179] Polypropylene, 45 parts;

[0180] modified vegetable fibers, 54 parts;

[0181] Calcium carbonate, 1 part;

[0182] Titanium dioxide, 4 parts;

[0183] Antioxidant, 0.2 parts;

[0184] Amide lubricant, 0.1 part;

[0185] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0186] The above-mentioned amine compound is dioctylamine;

[0187] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0188] The above titanate is calcium titanate;

[0189] The method for preparing the modified plant fiber comprises the following steps:

[0190] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0191] A method for preparing the above composite material comprises the following steps:

[0192] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0193] A method for preparing a cosmetic brush handle comprises the following steps:

[0194] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0195] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0196] Example 7

[0197] The difference between Example 7 and Example 1 is that the amounts of components are different.

[0198] Specific:

[0199] A composite material comprises the following components in parts by weight:

[0200] Polypropylene, 45 parts;

[0201] modified vegetable fibers, 62 parts;

[0202] Calcium carbonate, 2 parts;

[0203] Titanium dioxide, 4 parts;

[0204] Antioxidant, 0.3 parts;

[0205] Amide lubricant, 0.2 parts;

[0206] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0207] The above-mentioned amine compound is dioctylamine;

[0208] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0209] The above titanate is calcium titanate;

[0210] The method for preparing the modified plant fiber comprises the following steps:

[0211] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0212] A method for preparing the above composite material comprises the following steps:

[0213] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0214] A method for preparing a cosmetic brush handle comprises the following steps:

[0215] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0216] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0217] Example 8

[0218] The difference between Example 8 and Example 1 is that the amounts of components are different.

[0219] Specific:

[0220] A composite material comprises the following components in parts by weight:

[0221] Polypropylene, 45 parts;

[0222] modified vegetable fibers, 53 parts;

[0223] Calcium carbonate, 9 parts;

[0224] Titanium dioxide, 4 parts;

[0225] Antioxidant, 0.2 parts;

[0226] Amide lubricant, 0.1 part;

[0227] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0228] The above-mentioned amine compound is dioctylamine;

[0229] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0230] The above titanate is calcium titanate;

[0231] The method for preparing the modified plant fiber comprises the following steps:

[0232] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0233] A method for preparing the above composite material comprises the following steps:

[0234] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0235] A method for preparing a cosmetic brush handle comprises the following steps:

[0236] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0237] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0238] Example 9

[0239] The difference between Example 9 and Example 1 is that the amounts of components are different.

[0240] Specific:

[0241] A composite material comprises the following components in parts by weight:

[0242] Polypropylene, 45 parts;

[0243] modified vegetable fiber, 60 parts;

[0244] Calcium carbonate, 7 parts;

[0245] Titanium dioxide, 4 parts;

[0246] Antioxidant, 0.2 parts;

[0247] Amide lubricant, 0.1 part;

[0248] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0249] The above-mentioned amine compound is dioctylamine;

[0250] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0251] The above titanate is calcium titanate;

[0252] The method for preparing the modified plant fiber comprises the following steps:

[0253] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0254] A method for preparing the above composite material comprises the following steps:

[0255] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0256] A method for preparing a cosmetic brush handle comprises the following steps:

[0257] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0258] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0259] Example 10

[0260] The difference between Example 10 and Example 1 is that the amounts of components are different.

[0261] Specific:

[0262] A composite material comprises the following components in parts by weight:

[0263] Polypropylene, 45 parts;

[0264] modified vegetable fiber, 55 parts;

[0265] Calcium carbonate, 2 parts;

[0266] Titanium dioxide, 4 parts;

[0267] Antioxidant, 0.6 parts;

[0268] Amide lubricant, 0.1 part;

[0269] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0270] The above-mentioned amine compound is dioctylamine;

[0271] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0272] The above titanate is calcium titanate;

[0273] The method for preparing the modified plant fiber comprises the following steps:

[0274] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0275] A method for preparing the above composite material comprises the following steps:

[0276] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0277] A method for preparing a cosmetic brush handle comprises the following steps:

[0278] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0279] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0280] Embodiment 11

[0281] The difference between Example 11 and Example 1 is that the amounts of components are different.

[0282] Specific:

[0283] A composite material comprises the following components in parts by weight:

[0284] Polypropylene, 45 parts;

[0285] modified vegetable fibers, 62 parts;

[0286] Calcium carbonate, 1 part;

[0287] Titanium dioxide, 4 parts;

[0288] Antioxidant, 0.7 parts;

[0289] Amide lubricant, 0.3 parts;

[0290] The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide.

[0291] The above-mentioned amine compound is dioctylamine;

[0292] The above-mentioned silane coupling agent is γ-aminopropyltriethoxysilane;

[0293] The above titanate is calcium titanate;

[0294] The method for preparing the modified plant fiber comprises the following steps:

[0295] 10 parts of silicon dioxide and 0.05 parts by weight of calcium titanate are mixed, added to an anhydrous ethanol solution, 2 parts of silane coupling agent are added after ultrasonic treatment, and a suspension is obtained after sufficient stirring. 80 parts of plant fibers are immersed in the above suspension at 30°C, taken out after sufficient stirring, and then immersed in an amine compound solution containing 3 parts of amine compounds, stirred at 30°C for 2 hours, and taken out to obtain the modified plant fiber.

[0296] A method for preparing the above composite material comprises the following steps:

[0297] The composite material is obtained by mixing polypropylene, modified plant fiber, calcium carbonate, titanium dioxide, antioxidant and amide lubricant, extruding and granulating.

[0298] A method for preparing a cosmetic brush handle comprises the following steps:

[0299] The composite material is melted, extruded, granulated, and shaped by a mold to obtain a cosmetic brush handle.

[0300] Surface treatment of the makeup brush handle: corona treatment and cleaning treatment are performed on the makeup brush handle to remove grease, dust, stains and other impurities on the surface, and then PP water (also known as PP adhesion promoter) is sprayed to ensure that it can fully infiltrate and penetrate into the tiny pores of the product. After spraying the PP water, wait for it to dry and solidify to form an adhesion layer to complete the surface treatment of the makeup brush handle.

[0301] Comparative Example 1

[0302] The difference between Comparative Example 1 and Example 1 is that in Comparative Example 1, the raw material of the modified plant fiber does not contain amine compounds.

[0303] Comparative Example 2

[0304] The difference between Comparative Example 2 and Example 1 is that in Comparative Example 2, the raw material of the modified plant fiber does not contain titanate.

[0305] Comparative Example 3

[0306] The difference between Comparative Example 2 and Example 2 is that in Comparative Example 3, kaolin is replaced by bentonite in the raw materials of the adhesive.

[0307] Comparative Example 4

[0308] The difference between Comparative Example 4 and Example 2 is that in Comparative Example 3, kaolin is replaced by montmorillonite in the raw material of the adhesive.

[0309] Performance Test:

[0310] The cosmetic brush handles prepared in Examples 1-3 and Comparative Examples 1-4 were subjected to the following tests. The test results are shown in Table 1.

[0311] Adhesion: 3M TM Acrylic coating is applied on the surface of the makeup brush handle with a coating thickness of 30mm. Six parallel lines perpendicular to each other are scratched on the coating with a grid knife. The debris on the surface is gently brushed off with a soft brush. Then, special test tape is spread on the grid. After smoothing it with hands, the tape is pulled away at the same angle and speed to observe the state of the scratched part of the coating.

[0312] High temperature resistance is tested according to GB / T1735-2009 standard.

[0313] Table 1

[0314]

[0315] Compared with Comparative Example 1, in Comparative Example 1, since the raw materials of the modified plant fiber do not contain amine compounds, the surface of the plant fiber lacks sufficient affinity, resulting in a decrease in the binding force between it and polypropylene, thereby affecting the adhesion of the makeup brush handle prepared from the composite material.

[0316] Compared with Comparative Example 2, Example 1 has a poor thermal deformation temperature of the cosmetic brush handle of Comparative Example 2 because the raw material of the modified plant fiber in Comparative Example 2 does not contain titanate, which causes the compatibility of the fiber surface with polypropylene to deteriorate. The composite material is more susceptible to interface damage between the fiber and the matrix under the action of external force.

[0317] Compared with Comparative Examples 3-4, the prepared composite material of Example 2 has better adhesion because kaolin has a stronger surface affinity and can better form an interface bond with materials such as polypropylene and modified plant fibers, providing stronger adhesion, while bentonite and montmorillonite polypropylene have weaker bonding forces, affecting the performance.

[0318] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention specification, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A composite material, characterized in that: Includes the following components: Polymer resin; modified plant fibers; filler; Additives; The raw materials of the modified plant fiber include plant fiber, amine compound, silane coupling agent, titanate and silicon dioxide; The polymer resin includes at least one of polypropylene, polybutylene succinate and polyethylene.

2. A composite material according to claim 1, characterized in that: The composite material comprises the following components in parts by weight: Polymer resin, 45-50 parts; Modified plant fiber, 40-60 parts; Filler, 5-14 parts.

3. A composite material according to claim 1, characterized in that: The filler includes at least one of calcium carbonate, titanium dioxide and graphene.

4. A composite material according to claim 1, characterized in that: The auxiliary agent includes at least one of an antioxidant and an amide lubricant.

5. A composite material according to claim 1, characterized in that: The preparation method of the modified plant fiber comprises the following steps: mixing silicon dioxide, a silane coupling agent and a titanate in a solvent to obtain a suspension; immersing the plant fiber in the suspension, taking it out and then immersing it in a solution containing an amine compound, heating it, and obtaining the modified plant fiber.

6. A composite material according to claim 1, characterized in that: The amine compound includes at least one of trioctylamine, n-octylamine and dioctylamine.

7. A composite material according to claim 1, characterized in that: The components of the composite material also include an adhesive. The preparation method of the adhesive includes the following steps: mixing kaolin, plant fiber, surfactant, crosslinking agent, and magnesium hydroxide in water to obtain a first solution; mixing di-tert-butyl peroxide in an organic solvent to obtain a second solution; mixing the first solution and the second solution, adjusting the pH to neutral, and obtaining the adhesive.

8. A method for preparing a composite material according to any one of claims 1 to 7, characterized in that: The following steps are involved: The composite material is obtained by mixing high molecular resin, modified plant fiber, filler and auxiliary agent, extruding and granulating.

9. A cosmetic brush handle, characterized in that: The method comprises a composite material as claimed in any one of claims 1 to 7.

10. The cosmetic brush handle according to claim 9, characterized in that: The method also includes the step of subjecting the cosmetic brush handle to corona treatment, plasma treatment or chemical reagent treatment.

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