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Celluloid composite material and preparation method thereof

A composite material and celluloid technology, which is applied in the field of preparation of celluloid composite materials, can solve the problems of easy combustion and decomposition of celluloid and low mechanical properties, and achieve the effects of easy combustion and decomposition and improved mechanical properties.

Inactive Publication Date: 2007-09-19
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiency of low mechanical properties in the prior art, the present invention provides a celluloid composite material, which uses nano-scale β-silicon carbide whiskers as a toughening and reinforcing modifier to improve the mechanical properties of celluloid, while retaining the celluloid at high temperature. 、Characteristics of easy combustion and decomposition under high heat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1, 5g of NDZ-101 monoalkoxy titanate coupling agent was dissolved in 12g of isopropanol solvent and stirred evenly, 30g of nano-sized β-silicon carbide whiskers were added, and stirred for 35min with a glass rod , and then ultrasonically treated for 40 minutes to make it fully mixed. Stir while heating again until the solvent volatilizes, then put the mixture into a vacuum drying oven to dry; take 95g of celluloid powder, put it into a high-speed mixer together with the nano-scale β-silicon carbide whiskers treated with the aforementioned coupling agent, Use multiple short-term stirring methods to prevent local temperature from being too high, mix evenly under high-speed stirring, put the above-mentioned uniformly mixed raw materials into the mold, cold press at room temperature for 20 minutes, and pre-press the cold blank at 120 ° C. After hot melting for 0.5h, inject into the mold, deflate 3~5 times, pressurize to 10MPa after 10min, deflate 3 times, then defla...

Embodiment 2

[0017] Example 2, 4g of NDZ-105 monoalkoxy unsaturated fatty acid titanate coupling agent was dissolved in 9g of isopropanol solvent and stirred evenly, 24g of nano-sized β-silicon carbide whiskers were added, and the Rod stirring for 30 minutes, and then ultrasonic treatment for 35 minutes to make it fully mixed. Stir while heating again until the solvent volatilizes, then put the mixture into a vacuum drying oven to dry; take 85g of celluloid powder, put it into a high-speed mixer together with the nano-scale β-silicon carbide whiskers treated with the aforementioned coupling agent, Use multiple short-term stirring methods to prevent local temperature from being too high, mix evenly under high-speed stirring, put the above-mentioned uniformly mixed raw materials into the mold, cold press at room temperature for 20 minutes, and pre-press the cold blank at 120 ° C. After hot melting for 0.5h, pour into the mold, deflate 3-5 times, pressurize 10MPa after 10min, deflate 3 times,...

Embodiment 3

[0019] Example 3, 3g of γ-aminopropyltriethoxysilane with the grade of KH-550 was dissolved in 6g of ethanol solvent and stirred uniformly, 16g of nano-sized β-silicon carbide whiskers were added, stirred with a glass rod for 25min, and then Ultrasonic treatment for 30 minutes to make it fully mixed. Stir while heating again until the solvent volatilizes, then put the mixture into a vacuum drying oven to dry; take 75g of celluloid powder, put it into a high-speed mixer together with the nano-scale β-silicon carbide whiskers treated with the aforementioned coupling agent, Use multiple short-term stirring methods to prevent local temperature from being too high, mix evenly under high-speed stirring, put the above-mentioned uniformly mixed raw materials into the mold, cold press at room temperature for 20 minutes, and pre-press the cold blank at 120 ° C. After hot melting for 0.5h, pour into the mold, deflate 3-5 times, pressurize 10MPa after 10min, deflate 3 times, deflate 3-5 t...

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Abstract

The invention discloses a celluloid composite material, which prepared by celluloid powder of 60-95% by weight, nano beta-silicon carbide crystal whisker of 1-30% by weight, coupling agent of 1-5% by weight and solution of 1-12% by weight. The invention also discloses a method of preparing the celluloid composite material, which includes steps: dissolving the coupling agent into the solution and stirring equally, adding the nano beta-silicon carbide crystal whisker and mixing equally; volatilizing the solvent, putting the mixture into vacuum drying box to drying; adding the celluloid powder to the mixture powder, putting the mixture into high speed mixing machine to mixing equally, pressing and forming. Due to using nano beta-silicon carbide whisker to plasticizing the celluloid, impact strength of the prepared celluloid composite material is increased from 4.15MPa of existent technique to 6.53-11.26MPa, tensile strength is enhanced from 28.95MPa to 31.32-41.84MPa, bending strength is improved from 35.40MPa to 41.24-54.04MPa, and the prepared celluloid composite material also retains character of easy burning and decomposition for the celluloid basal body under high temperature.

Description

technical field [0001] The invention relates to a celluloid composite material, and also relates to a preparation method of the celluloid composite material. Background technique [0002] The document ""Chemical Education", 1995, No. 2, page 46" discloses a plastic product called celluloid. Celluloid is an extremely ideal matrix material for fast ablation materials. When the storage temperature is higher than 140°C, it is easy to burn, and the combustion is extremely rapid. However, celluloid has excellent fast ablation performance and also exposes Disadvantages of its own: It takes a long time to prepare thick parts with this material, and it is difficult to plasticize, and the mechanical properties of the prepared material are not high: the tensile strength of pure celluloid material is only 28.95MPa, and the bending strength is only 28.95MPa. 35.40MPa, the impact strength is only 4.15MPa. This limits the scope of use of celluloid materials to a certain extent. Content...

Claims

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Application Information

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IPC IPC(8): C08L1/18C08K7/10C08J5/00C08K5/56C08K5/524C08K5/54
Inventor 张秋禹肖军顾军渭张军平张和鹏孔杰
Owner NORTHWESTERN POLYTECHNICAL UNIV