Bamboo fiber composite material for optical cable drum and preparation method of bamboo fiber composite material
The preparation of bamboo fiber composite materials has solved the problems of resource consumption and environmental protection in optical cable reel materials, realizing low-cost, high-performance optical cable reel materials, reducing energy consumption in preparation and reducing deforestation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-18
- Publication Date
- 2026-04-21
AI Technical Summary
Existing optical cable reel materials suffer from problems such as high resource consumption, susceptibility to moisture, mold, insect infestation, insufficient strength, high cost, and environmental unfriendliness. Traditional bamboo-plastic composite materials and pure plastic reels cannot effectively solve these problems.
Bamboo fiber composite materials are prepared by blending bamboo fiber and polypropylene in a large proportion, adding MA grafted polyolefin elastomer, lubricant and antioxidant, and using compression molding process. This improves the bamboo fiber filling rate and material compatibility, as well as the strength and environmental friendliness.
This has led to the development of low-cost, high-performance, and environmentally friendly optical cable reel materials, which reduces energy consumption in manufacturing, decreases deforestation, and improves the mechanical properties and stability of the materials.
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Abstract
Description
Technical Field
[0001] This application relates to the technical field of optical cable reels, and in particular to a bamboo fiber composite material for optical cable reels and a method for preparing the same. Background Technology
[0002] In the field of communication equipment accessories technology, optical cable reels serve as crucial load-bearing tools in the production, transportation, and laying of optical cables, and their performance is of paramount importance. With the continuous development of the communications industry, the demand for optical cable reels is increasing daily. Currently, the optical cable reel market mainly relies on solid wood materials, such as pine and poplar. These materials, to a certain extent, meet market demand and facilitate the normal operation of optical cable transportation and other processes. However, solid wood reels have the following inherent drawbacks: high resource consumption, relying on logging, which does not conform to the concept of sustainable development; performance defects, susceptible to moisture, mold, and insect infestation, leading to decreased strength and short service life; quality fluctuations, due to the anisotropy of wood itself, resulting in unstable reel quality; and rising costs, with prices continuously increasing as timber resources become increasingly scarce.
[0003] To address the practical problems encountered in optical cable reels, researchers attempted to use pure plastic or modified bamboo-plastic composite materials as alternatives, employing specific molding processes to manufacture the reels in hopes of overcoming the shortcomings of traditional solid wood reels. However, while bamboo-plastic composite reels showed some improvements, they still failed to effectively address key performance indicators such as cost, environmental friendliness, and strength. Their environmental performance was poor, and their strength was insufficient. This is because existing bamboo-plastic composite reels are mostly manufactured using extrusion or injection molding, and to ensure fluidity, the bamboo fiber filling content is typically low (generally below 40%), leading to higher costs and failing to fully leverage the cost advantages of bamboo. Pure plastic reels, on the other hand, are heavily influenced by oil prices, and the extensive use of plastic is environmentally unfriendly, often resulting in insufficient strength. Summary of the Invention
[0004] To address the aforementioned technical problems, this application provides a bamboo fiber composite material for optical cable reels and a method for preparing the same.
[0005] In a first aspect, this application provides a bamboo fiber composite material for optical cable reels, wherein the raw materials used, by weight, include the following components: 700-850 parts bamboo fiber; 200-250 parts polypropylene material; 30-80 parts MA grafted polyolefin elastomer; 10-30 parts lubricant; and 0.3-0.5 parts antioxidant. The polypropylene material includes polypropylene masterbatch and recycled polypropylene, and the antioxidant includes hydroxylamine antioxidants and basic antioxidants.
[0006] By adopting the above technical solution, this application blends bamboo fiber and polypropylene materials in a large ratio of (7-8.5):(2-2.5). The bamboo fiber is derived from bamboo product processing residues (such as bamboo shavings and bamboo powder), resulting in extremely low cost and effectively leveraging the cost advantage of bamboo. Simultaneously, this application adds a certain amount of MA-grafted polyolefin elastomer to improve the compatibility of bamboo fiber and polypropylene materials, enhancing the interfacial bonding between hydrophilic bamboo fiber and hydrophobic polypropylene materials. Bamboo fiber can thus improve the tensile strength and impact toughness of the composite material, while also enhancing its dimensional stability and environmental friendliness. Furthermore, the addition of bamboo fiber to the composite material achieves significant lightweighting. Based on this, this application also adds lubricants and antioxidants to optimize material flow and improve the overall performance of the composite material. Therefore, the bamboo fiber composite material obtained in this application has a high bamboo fiber filling rate, fully utilizing the cost advantage of bamboo fiber. Simultaneously, bamboo fiber significantly improves the mechanical properties of polypropylene materials, and MA-grafted polyolefin elastomer enhances the system's compatibility, resulting in a final composite material with multiple advantages including lightweighting, environmental friendliness, low cost, high performance, and renewable raw materials.
[0007] Preferably, the raw materials used, by weight, include the following components: 780 parts bamboo fiber; 220 parts polypropylene material; 55 parts MA grafted polyolefin elastomer; 20 parts lubricant; and 0.45 parts antioxidant.
[0008] By adopting the above technical solution, this application strictly controls the weight ratio of bamboo fiber, polypropylene material, MA grafted polyolefin elastomer, lubricant and antioxidant, further optimizing the comprehensive performance of bamboo fiber composite material and reducing the preparation cost as much as possible without affecting its strength and usability.
[0009] Preferably, the polypropylene material comprises polypropylene masterbatch and recycled polypropylene in a weight ratio of (5-6):(4-5).
[0010] By adopting the above technical solution, this application uses polypropylene masterbatch and recycled polypropylene in a weight ratio of (5-6):(4-5) to form an integral polypropylene material. The polypropylene masterbatch has higher mechanical strength and processing stability, but the recycled polypropylene has better compatibility with bamboo fiber and can further reduce the preparation cost. The weight ratio controlled by this application can add as much recycled polypropylene as possible while ensuring that the bamboo fiber composite material has good strength, thereby further improving the environmental value of the product and its preparation process.
[0011] Preferably, the antioxidant comprises a hydroxylamine antioxidant and a basic antioxidant in a weight ratio of (1.5-2):1.
[0012] By adopting the above technical solution, this application uses a compound of hydroxylamine antioxidant and basic antioxidant in a weight ratio of (1.5-2):1 as an antioxidant. The antioxidant can effectively inhibit thermo-oxidative aging, the hydroxylamine antioxidant has good free radical scavenging ability, and the basic antioxidant can effectively decompose hydrogen peroxide, thus synergistically improving processing stability. Therefore, the oxidant of this application can inhibit the oxidative degradation of polypropylene materials, maintain the integrity of its molecular weight, and improve tensile strength and impact toughness.
[0013] Preferably, the lubricant comprises zinc stearate and / or polyethylene wax.
[0014] By adopting the above technical solution, this application uses zinc stearate and / or polyethylene wax as lubricants, which can reduce melt viscosity and frictional resistance, improve processing fluidity, reduce surface defects, and control shrinkage and dimensional stability.
[0015] Preferably, the hydroxylamine antioxidant is prepared from ammonium hydroxide and bromoalkane, wherein the bromoalkane is one or two of N,N-bisdecylhydroxylamine, N,N-bis(n-dodecyl)hydroxylamine, N,N-bistetradecylhydroxylamine, N,N-bis(n-hexadecyl)hydroxylamine and N,N-bisoctadecylhydroxylamine.
[0016] Preferably, the method for preparing the hydroxylamine antioxidant includes the following steps: Hydroxyammonium chloride, bromoalkane and acid-binding agent were mixed in a molar ratio of 1:(4-6):(12-13) and reacted at 65-85℃ for 16-20h. After cooling and crystallization, the mixture was filtered, washed and dried to obtain hydroxylamine antioxidants.
[0017] Preferably, the bromoalkane comprises N,N-bis(n-dodecane)hydroxylamine and N,N-bisoctadecylhydroxylamine in a molar ratio of 4:1.
[0018] Preferably, the molar ratio of the ammonium hydroxychloride, bromoalkane and acid-binding agent when blended is 1:5:12.5.
[0019] By adopting the above technical solution, this application utilizes ammonium hydroxide and bromoalkane to prepare hydroxylamine antioxidants, which can significantly improve the processing stability and thermo-oxidative stability of polypropylene materials, improve the tensile properties of polypropylene materials, and increase the impact resistance and tensile strength of polypropylene materials. Compared with other antioxidants, the antioxidant prepared in this application has better antioxidant activity and a more superior synergistic effect with basic antioxidants.
[0020] Secondly, this application also provides a method for preparing bamboo fiber composite material for optical cable reels, comprising the following steps: S1. Mixing: Mix the raw materials at a speed of 700-1000 rpm for 5-10 minutes; S2. Preheating: Treat the substance obtained in S1 at a temperature of 160-180℃ for 3-8 minutes to preheat it; S3. Compression molding: The material obtained in S2 is held under pressure of 5-15MPa for 2-5 minutes and then cooled to obtain bamboo fiber composite material.
[0021] By adopting the above technical solution, this application significantly increases the bamboo fiber content, making the most of inexpensive bamboo while reducing the costly plastic component. Therefore, this application uses compression molding to prepare bamboo fiber composite materials. Compression molding has much lower requirements for material flowability than injection molding and extrusion, thus allowing for such a high filling volume. The compression molding process also does not require continuous strong shear plasticization by a screw, and the energy consumption is lower than that of injection molding or extrusion processes. Therefore, the preparation method of this application realizes the high-value utilization of bamboo processing waste, reduces deforestation, and conforms to the circular economy policy.
[0022] In summary, this application has the following beneficial technical effects: 1. The bamboo fiber composite material obtained in this application has a high bamboo fiber filling rate, which can give full play to the cost advantage of bamboo fiber. At the same time, the mechanical properties of polypropylene material are greatly improved by using bamboo fiber, and the compatibility of the system is improved by using MA grafted polyolefin elastomer. The resulting composite material has multiple advantages such as lightweight, environmental protection, low cost, high performance and renewable raw materials. 2. This application utilizes compression molding to prepare bamboo fiber composite materials. Compression molding has much lower requirements for material flowability than injection molding and extrusion, thus allowing for high filling content of bamboo fiber. The compression molding process also does not require continuous strong shear plasticization by a screw, and the energy consumption is lower than that of injection molding or extrusion processes. Therefore, the preparation method of this application realizes the high-value utilization of bamboo processing waste, reduces deforestation, and is in line with the circular economy policy. 3. This application utilizes ammonium hydroxide and bromoalkane to prepare a hydroxylamine antioxidant, which can significantly improve the processing stability and thermo-oxidative stability of polypropylene materials, improve the tensile properties of polypropylene materials, and increase the elongation at break and tensile strength of polypropylene materials. Compared with other antioxidants, the antioxidant prepared in this application has better antioxidant activity and a more superior synergistic effect with basic antioxidants. Detailed Implementation
[0023] Material Sources: Unless otherwise specified, all raw materials used in this application are commercially available products, specifically: Polypropylene masterbatch, purchased from Daqing Petrochemical Company, grade T30S, MFR 3.5g / 10min; MA-grafted polyolefin elastomer was purchased from Nanjing Sutai Polymer Technology Co., Ltd., with an MA grafting rate of 1.0% and an MFR of 2.0 g / 10 min. Recycled polypropylene, purchased from Botou Haosen Plastic Products Co., Ltd., item number 018; The bamboo fiber is supplied by bamboo powder, which is purchased from Jiangxi Ruimei Bamboo and Wood Technology Co., Ltd., with product number BP80.
[0024] The present application will be further described in detail below with reference to preparation examples, embodiments and comparative examples.
[0025] Preparation Example 1.1 A method for preparing hydroxylamine antioxidants includes the following steps: 0.1 mol ammonium hydroxide and 1.3 mol triethylamine were dispersed in 400 g tetrahydrofuran. Under nitrogen protection, the temperature of the system was lowered to 3 °C and stirred for 30 min. Then, 0.4 mol bromoalkane was dispersed in 100 g tetrahydrofuran. The bromoalkane was obtained by mixing 0.2 mol N,N-bisdecylhydroxylamine and 0.2 mol N,N-bis(n-hexadecane)hydroxylamine. After the mixture was homogeneous, it was added to the aforementioned ammonium hydroxide solution. The system was heated to 65 °C and kept at that temperature for 20 h. After the reaction was completed, the system was cooled and crystallized. The mixture was then filtered under negative pressure. The filtered substance was washed three times with appropriate amounts of tetrahydrofuran and distilled water to obtain a white solid. The solid was dried in a vacuum drying oven at 50 °C for 6 h to obtain a hydroxylamine antioxidant.
[0026] Preparation Example 1.2 A method for preparing hydroxylamine antioxidants includes the following steps: 0.1 mol of ammonium hydroxide and 1.2 mol of triethylamine (a chelating agent) were dispersed in 400 g of tetrahydrofuran. Under nitrogen protection, the temperature of the system was lowered to 3 °C and stirred for 30 min. Then, 0.6 mol of bromoalkane (0.6 mol N,N-bistetradecylhydroxylamine) was dispersed in 100 g of tetrahydrofuran. After mixing evenly, the mixture was added to the aforementioned ammonium hydroxide solution. The system was heated to 85 °C and kept at this temperature for 16 h. After the reaction was completed, the system was cooled to crystallize. The mixture was then filtered under negative pressure. The filtered substance was washed three times with appropriate amounts of tetrahydrofuran and distilled water to obtain a white solid. The solid was dried in a vacuum drying oven at 50 °C for 6 h to obtain a hydroxylamine antioxidant.
[0027] Preparation Example 1.3 A method for preparing hydroxylamine antioxidants includes the following steps: 0.1 mol of ammonium hydroxide and 1.25 mol of triethylamine (a chelating agent) were dispersed in 400 g of tetrahydrofuran. Under nitrogen protection, the temperature of the system was lowered to 3 °C and stirred for 30 min. Then, 0.5 mol of bromoalkane was dispersed in 100 g of tetrahydrofuran. The bromoalkane was obtained by mixing 0.2 mol of N,N-bis(n-dodecyl)hydroxylamine and 0.3 mol of N,N-bisoctadecylhydroxylamine. After the mixture was homogeneous, it was added to the aforementioned ammonium hydroxide solution. The system was heated to 75 °C and kept at that temperature for 18 h. After the reaction was completed, the system was cooled and crystallized. The mixture was then filtered under negative pressure. The filtered substance was washed three times with appropriate amounts of tetrahydrofuran and distilled water to obtain a white solid. The solid was dried in a vacuum drying oven at 50 °C for 6 h to obtain a hydroxylamine antioxidant.
[0028] Preparation Example 2.1 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.2 mol N,N-bis(n-dodecane)hydroxylamine and 0.3 mol N,N-bis(n-hexadecane)hydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0029] Preparation Example 2.2 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.2 mol N,N-bisdecylhydroxylamine and 0.3 mol N,N-bistetradecylhydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0030] Preparation Example 2.3 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.2 mol N,N-bisdecylhydroxylamine and 0.3 mol N,N-bisoctadecylhydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0031] Preparation Example 3.1 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.3 mol N,N-bis(n-dodecane)hydroxylamine and 0.2 mol N,N-bisoctadecylhydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0032] Preparation Example 3.2 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.4 mol N,N-bis(n-dodecane)hydroxylamine and 0.1 mol N,N-bisoctadecylhydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0033] Preparation Example 3.3 The preparation method of hydroxylamine antioxidants differs from that of Preparation Example 1.3 in that the bromoalkane is obtained by mixing 0.1 mol N,N-bis(n-dodecane)hydroxylamine and 0.4 mol N,N-bisoctadecylhydroxylamine, while the rest is the same as in Preparation Example 1.3.
[0034] Example 1.1 A method for preparing a bamboo fiber composite material for optical cable reels includes the following steps: S1. Mixing: Weigh each raw material according to the amount in Table 1. The hydroxylamine antioxidant used is the hydroxylamine antioxidant prepared in Preparation Example 1.1, and the base antioxidant is antioxidant 168. Then put the raw materials into a high-speed mixer and mix for 5 minutes at a speed of 1000 rpm. S2. Preheating: Place the material obtained in S1 into the mold and preheat it at 180°C for 3 minutes to allow the plastic to initially melt. S3. Compression molding: Place the material obtained in S2 into a compression molding machine, start the compression molding machine, hold the pressure at 15MPa for 2 minutes, after the pressure holding is completed, cool it with water to below 60℃, open the mold, and obtain the bamboo fiber composite material for optical cable reels.
[0035] Example 1.2 A method for preparing a bamboo fiber composite material for optical cable reels includes the following steps: S1. Mixing: Weigh each raw material according to the amount in Table 1. The hydroxylamine antioxidant used is the hydroxylamine antioxidant prepared in Preparation Example 1.2, and the base antioxidant is antioxidant 168. Then put the raw materials into a high-speed mixer and mix at 700 rpm for 10 min. S2. Preheating: Place the material obtained in S1 into the mold and preheat it at 160°C for 8 minutes to allow the plastic to initially melt. S3. Compression molding: Place the material obtained in S2 into a compression molding machine, start the compression molding machine, hold the pressure at 5MPa for 5 minutes, after the pressure holding is completed, cool it with water to below 60℃, open the mold, and obtain the bamboo fiber composite material for optical cable reels.
[0036] Example 1.3 A method for preparing a bamboo fiber composite material for optical cable reels includes the following steps: S1. Mixing: Weigh each raw material according to the amount in Table 1. The hydroxylamine antioxidant used is the hydroxylamine antioxidant prepared in Preparation Example 1.1, and the base antioxidant is antioxidant 168. Then put the raw materials into a high-speed mixer and mix at 700 rpm for 8 minutes. S2. Preheating: Place the material obtained in S1 into the mold and preheat it at 170°C for 6 minutes to allow the plastic to initially melt. S3. Compression molding: Place the material obtained in S2 into a compression molding machine, start the compression molding machine, hold the pressure at 10MPa for 3 minutes, after the pressure holding is completed, cool it with water to below 60℃, open the mold, and obtain the bamboo fiber composite material for optical cable reels.
[0037] Table 1. Raw material consumption (kg) for Examples 1.1-1.3 Example 2.1 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 1.3, while the rest is the same as in Example 1.3.
[0038] Example 2.2 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 2.1, while the rest is the same as in Example 1.3.
[0039] Example 2.3 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 2.2, while the rest is the same as in Example 1.3.
[0040] Example 2.4 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 2.3, while the rest is the same as in Example 1.3.
[0041] Example 2.5 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 3.1, while the rest is the same as in Example 1.3.
[0042] Example 2.6 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 3.2, while the rest is the same as in Example 1.3.
[0043] Example 2.7 A method for preparing a bamboo fiber composite material for optical cable reels differs from Example 1.3 in that the hydroxylamine antioxidant obtained in Preparation Example 1.1 is replaced with the hydroxylamine antioxidant obtained in Preparation Example 3.3, while the rest is the same as in Example 1.3.
[0044] Comparative Examples 1.1-1.2 S1. Mixing: Weigh each raw material according to the amount in Table 1. The hydroxylamine antioxidant used is the hydroxylamine antioxidant prepared in Preparation Example 1.1, and the base antioxidant is antioxidant 168. Then put the raw materials into a high-speed mixer and mix for 5 minutes at a speed of 1000 rpm. S2. Preheating: Place the material obtained in S1 into the mold and preheat it at 180°C for 3 minutes to allow the plastic to initially melt. S3. Compression molding: Place the material obtained in S2 into a compression molding machine, start the compression molding machine, hold the pressure at 15MPa for 2 minutes, after the pressure holding is completed, cool it with water to below 60℃, open the mold, and obtain the bamboo fiber composite material for optical cable reels.
[0045] Table 2. Raw material usage (kg) for Comparative Examples 1.1-1.2 Comparative Example 2.1 The difference from Example 1.1 is that in S1, recycled polypropylene is removed, and the amount of polypropylene masterbatch used is 250 kg, while the rest is the same as in Example 1.1.
[0046] Comparative Example 2.2 The difference from Example 1.1 is that in S1, the polypropylene masterbatch is removed, and the amount of recycled polypropylene used is 250 kg, while the rest is the same as in Example 1.1.
[0047] Comparative Example 3.1 The difference from Example 1.1 is that in S1, antioxidant 168 is removed, and the amount of hydroxylamine antioxidant is 0.3 kg, while the rest is the same as in Example 1.1.
[0048] Comparative Example 3.2 The difference from Example 1.1 is that in S1, hydroxylamine antioxidants are removed, and the amount of antioxidant 168 is 0.3 kg, while the rest are the same as in Example 1.1.
[0049] Comparative Example 3.3 The difference from Example 1.1 is that antioxidant 168 and hydroxylamine antioxidants are removed in S1, while the rest are the same as in Example 1.1.
[0050] Comparative Example 4.1 The difference from Example 1.1 is that in S1, antioxidant 168 is replaced with an equal amount of antioxidant 1098, and the rest is the same as in Example 1.1.
[0051] Comparative Example 4.2 The difference from Example 1.1 is that in S1, the hydroxylamine antioxidant is replaced with an equal amount of antioxidant 1010, and the rest is the same as in Example 1.1.
[0052] Performance testing 1. Tensile property test: The tensile strength of the bamboo fiber composite materials obtained in the examples and comparative examples was determined in accordance with GB / T 1040.1-2018 and recorded as the initial strength T0 (MPa); 2. Antioxidant test: Accelerated thermo-oxidative aging test was carried out in a 100℃ forced-air drying oven. The aging sampling time was 16 days. After being placed at room temperature for 24 hours, the above tensile property test was carried out. The tensile strength after aging was recorded as T1 (MPa). 3. Impact resistance test: The notched impact strength (kJ / m²) of the bamboo fiber composite materials obtained in the examples and comparative examples was determined according to GB / T 1043.1-2008. 2 ).
[0053] Table 3 Data Record Table Data Analysis: As shown in Table 3, in the bamboo fiber composite materials of Examples 1.1-1.3 of this application, the bamboo powder content is between 69.3% and 72.5 wt%, the tensile strength (T0) reaches above 75.4 MPa, the tensile strength (T1) reaches above 70.1 MPa, the decrease rate of tensile strength after aging does not exceed 7.1%, and the notched impact strength also reaches 33 kJ / m. 2 As can be seen from the above, the bamboo fiber composite material of this application has a high bamboo fiber filling rate, which can give full play to the cost advantage of bamboo fiber. At the same time, the mechanical properties of polypropylene material are greatly improved by using bamboo fiber, and the compatibility of the system is improved by using MA grafted polyolefin elastomer. As a result, the final composite material has multiple advantages such as lightweight, environmental protection, low cost, high performance and renewable raw materials.
[0054] In Examples 2.1-2.7, this application optimized the preparation process of hydroxylamine antioxidants. The results showed that, with the bamboo powder content remaining unchanged, the data in Example 2.6 were significantly better. It can be seen that the hydroxylamine antioxidants prepared under the specific preparation process and parameters of this application can significantly improve the processing stability and thermo-oxidative stability of polypropylene materials, improve the tensile properties of polypropylene materials, and increase the impact resistance and tensile strength of polypropylene materials.
[0055] In Comparative Example 1.1, this application reduced the amount of bamboo powder to 30.6 wt%, and the results showed that the notched impact strength, T0, and T1 were all significantly reduced. At the same time, due to the increase in the amount of polypropylene material, the overall oxidation resistance of the composite material also declined significantly. In Comparative Example 1.2, this application increased the amount of bamboo powder to 87.4 wt%, and the results showed that T0 and T1 were reduced to some extent. It can be seen that this application effectively utilizes the cost advantage of bamboo by blending bamboo fiber and polypropylene material in a large ratio of (7-8.5):(2-2.5), without negatively affecting the performance of the material. If the amount of bamboo fiber added is insufficient, the strength of the material will inevitably be greatly reduced. However, if the amount of bamboo fiber added is too large, even if the amount of compatibilizer is increased accordingly, it is still impossible to achieve sufficient blending of bamboo fiber and polypropylene matrix. The material dispersion in the system is uneven, and the strength of the composite material is also damaged.
[0056] In Comparative Example 2.1, recycled polypropylene was removed from this application. The results showed that the various performance data of the bamboo fiber composite material were not significantly improved. This is because although the strength of recycled polypropylene is inferior to that of polypropylene masterbatch, its compatibility with bamboo fiber is better. In Comparative Example 2.2, polypropylene masterbatch was removed from this application. The results showed that the notched impact strength, T0 and T1 were significantly reduced. It can be seen that the weight ratio controlled by this application can add as much recycled polypropylene as possible while ensuring that the bamboo fiber composite material has good strength, thereby further improving the environmental value of the product and its preparation process.
[0057] In Comparative Examples 3.1-3.3, this application adjusted the addition of antioxidants, and the results showed a sharp decrease in tensile strength. It can be seen that when a single antioxidant is removed, the decrease rate is about 11%, but when all antioxidants are removed, the decrease rate of tensile strength reaches nearly 30%. It can be seen that the combination of hydroxylamine antioxidants and basic antioxidants in this application can synergistically improve processing stability. Therefore, the oxidant in this application can inhibit the oxidative degradation of polypropylene materials, maintain the integrity of its molecular weight, and improve tensile strength and impact toughness.
[0058] In Comparative Examples 4.1-4.2, the combination of antioxidants in this application was changed, and the results showed that the notched impact strength, T0 and T1 were reduced. It can be seen that, compared with other antioxidants, the antioxidants prepared in this application have better antioxidant activity and better synergistic effect with the basic antioxidants.
[0059] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A bamboo fiber composite material for optical cable reels, characterized in that, By weight, the raw materials used include the following components: 700-850 parts bamboo fiber; 200-250 parts polypropylene material; and 30-80 parts MA grafted polyolefin elastomer. 10-30 parts lubricant; 0.3-0.5 parts antioxidant; the polypropylene material includes polypropylene masterbatch and recycled polypropylene, and the antioxidant includes hydroxylamine antioxidants and basic antioxidants.
2. The bamboo fiber composite material for optical cable reels according to claim 1, characterized in that, By weight, the raw materials used include the following components: 780 parts bamboo fiber; 220 parts polypropylene material; and 55 parts MA grafted polyolefin elastomer. 20 parts lubricant; 0.45 parts antioxidant.
3. The bamboo fiber composite material for optical cable reels according to claim 1, characterized in that, The polypropylene material comprises polypropylene masterbatch and recycled polypropylene in a weight ratio of (5-6):(4-5).
4. The bamboo fiber composite material for optical cable reels according to claim 1, characterized in that, The antioxidants include hydroxylamine antioxidants and basic antioxidants in a weight ratio of (1.5-2):
1.
5. The bamboo fiber composite material for optical cable reels according to claim 1, characterized in that, The lubricant includes zinc stearate and / or polyethylene wax.
6. The bamboo fiber composite material for optical cable reels according to claim 1, characterized in that, The hydroxylamine antioxidant is prepared from ammonium hydroxide and bromoalkane, wherein the bromoalkane is one or two of N,N-bisdecylhydroxylamine, N,N-bis(n-dodecyl)hydroxylamine, N,N-bistetradecylhydroxylamine, N,N-bis(n-hexadecyl)hydroxylamine and N,N-bisoctadecylhydroxylamine.
7. A bamboo fiber composite material for optical cable reels according to claim 6, characterized in that, The preparation method of the hydroxylamine antioxidant includes the following steps: Hydroxyammonium chloride, bromoalkane and acid-binding agent were mixed in a molar ratio of 1:(4-6):(12-13) and reacted at 65-85℃ for 16-20h. After cooling and crystallization, the mixture was filtered, washed and dried to obtain hydroxylamine antioxidants.
8. A bamboo fiber composite material for optical cable reels according to claim 7, characterized in that, The bromoalkane comprises N,N-bis(n-dodecane)hydroxylamine and N,N-bisoctadecylhydroxylamine in a molar ratio of 4:
1.
9. A bamboo fiber composite material for optical cable reels according to claim 7, characterized in that, The molar ratio of the ammonium hydroxychloride, bromoalkane, and acid-binding agent when blended is 1:5:12.
5.
10. A method for preparing a bamboo fiber composite material for optical cable reels according to any one of claims 1-9, characterized in that, Includes the following steps: S1. Mixing: Mix the raw materials at a speed of 700-1000 rpm for 5-10 minutes; S2. Preheating: Treat the substance obtained in S1 at a temperature of 160-180℃ for 3-8 minutes to preheat it; S3. Compression molding: The material obtained in S2 is held under pressure of 5-15MPa for 2-5 minutes and then cooled to obtain bamboo fiber composite material.