Preparation method and application of ramie fiber / epoxy resin composite material

A ramie fiber and epoxy resin technology, which is applied in the field of preparation of ramie fiber/epoxy resin composite materials, can solve the problems of fiber surface structural state pollution, long production process, etc., and achieves shortened preparation cycle, low cost, and shortened dispersion cycle. Effect

Inactive Publication Date: 2018-04-20
西安锐思博创应用材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, whether it is physical modification such as heat treatment, alkali treatment, low-temperature plasma treatment, or chemical treatment such as benzoic acid, organosilane, etc., it is necessary to treat the ramie fiber separately, so that the surface structure of the fiber changes. Also causes pollution, and the production process is relatively long

Method used

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  • Preparation method and application of ramie fiber / epoxy resin composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A preparation method of ramie fiber / epoxy resin composite material, the steps are as follows:

[0022] (1) Cut the ramie fibers into 10 mm length sections, place them in the mold cavity, and then place them on a mechanical vibration table. Set the vibration power to 1.5 KW, the vibration frequency to 600 HZ, the vibration amplitude to 3 mm, and The time is 10 min;

[0023] (2) Mix liquid bisphenol A epoxy resin with curing agent triethylenetetramine and silane coupling agent A-151 in a mass ratio of 1:1:0.02 to obtain epoxy resin glue;

[0024] (3), the mold cavity is taken out from the mechanical vibration table, and then the above-mentioned epoxy resin glue is injected into the mold cavity to soak the ramie fiber, and the mass concentration of the ramie fiber in the final system is 30%;

[0025] (4) Dry the impregnated ramie fibers in step (3) at room temperature, press them into shape at 100 MPa, and cure them in an oven at 60 °C for 24 h to obtain ramie fiber / epoxy...

Embodiment 2

[0028] A preparation method of ramie fiber / epoxy resin composite material, the steps are as follows:

[0029] (1) Cut the ramie fibers into sections with a length of 15 mm, place them in the mold cavity, and then place them on a mechanical vibration table, set the vibration power to 1.2 KW, the vibration frequency to 300 HZ, the amplitude to 5 mm, and the vibration The time is 30 min;

[0030] (2) Mix liquid phenolic epoxy resin with curing agent diethylenetriamine and silane coupling agent A151 at a mass ratio of 1.1:1:0.063 to obtain epoxy resin glue;

[0031] (3), the mold cavity is taken out from the mechanical vibration table, and then the above-mentioned epoxy resin glue is injected into the mold cavity to soak the ramie fiber, and the mass concentration of the ramie fiber in the final system is 40%;

[0032] (4) Dry the impregnated ramie fibers in step (3) at room temperature, press them into shape at 120 MPa, and cure them in an oven at 70 °C for 30 h to obtain ramie ...

Embodiment 3

[0035] A preparation method of ramie fiber / epoxy resin composite material, the steps are as follows:

[0036] (1) Cut the ramie fiber into a 20 mm length section, place it in the mold cavity, and then place it in a mechanical vibration table. Set the vibration power to 1.8 KW, the vibration frequency to 400 HZ, the amplitude to 2 mm, and the vibration The time is 20 min;

[0037] (2) Mix liquid bisphenol A epoxy resin with curing agent polyamide and silane coupling agent at a mass ratio of 1.2:1:0.044 to obtain epoxy resin glue;

[0038] (3), the mold cavity is taken out from the mechanical vibration table, and then the above-mentioned epoxy resin glue is injected into the mold cavity to soak the ramie fiber, and the mass concentration of the ramie fiber in the final system is 50%;

[0039] (4) Dry the ramie fibers impregnated in step (3) at room temperature, press them at 150 MPa, and cure them in an oven at 80 °C for 36 h to obtain ramie fiber / epoxy resin composites.

[00...

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Abstract

The invention belongs to the field of bullet-proof armor plates, and discloses a preparation method and application of a ramie fiber/epoxy resin composite material. Ramie fiber is cut into segments, and placed in a mold cavity, the mold cavity is placed in a mechanical vibration table, the vibration power is set to 1.2 to 1.8 KW, the vibration frequency is 300 to 600 HZ, the amplitude is 1 to 5 mm, and the vibration time is 10-30 min; liquid epoxy resin, a curing agent and a silane coupling agent are uniformly mixed in a mass ratio (1 to 1.2) : 1 : (0.01 to 0.066) to obtain an epoxy resin glueliquid; the mold cavity is taken out from the mechanical vibration table, the epoxy resin glue liquid is injected into the mold cavity to soak the ramie fiber; the soaked ramie fiber is first dried at room temperature, pressurized for forming, and finally cured to obtain the ramie fiber/epoxy resin composite material. The method avoids the problems of long period for dispersion of the ramie fiberby a solution method and performance reduction caused by modification of the surface of the fiber, and the obtained ramie fiber/epoxy resin composite material can be applied to a sandwich material ofthe bullet-proof armor plates.

Description

technical field [0001] The invention belongs to the field of bulletproof armor plates, and in particular relates to a preparation method and application of a ramie fiber / epoxy resin composite material. Background technique [0002] For bulletproof armor, its ballistic performance is a key indicator, including penetration resistance, impact resistance and avalanche resistance, and they are closely related to the materials that make up the armor. Armor materials should meet the requirements of "high hardness, high strength, high toughness, low density, and low cost" as much as possible. However, no homogeneous single-phase material can meet this requirement at the same time. As an armor material, ceramics have many advantages: it has extremely high hardness and compressive strength, which is beneficial to resist the erosion of high-speed armor-piercing projectiles; the density is small, about 1 / 4~1 / 2 of homogeneous armor steel, which is conducive to reducing the weight of arm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08L1/02C08J5/04
Inventor 方璐董会娜姚栋嘉郭杰肖丹梁迪迪
Owner 西安锐思博创应用材料科技有限公司
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