Preparation method of microfibrillated fiber reinforced composite material

A composite material and fiber-reinforced technology, which is applied in the field of material preparation, can solve the problems of weak shear performance and impact resistance, and achieve the effects of improving interface performance, uniform matrix, and improving impact strength.

Inactive Publication Date: 2020-08-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of weak shear performance and impact resistance of existing fiber-reinforced polymer-based composite materials, and to provide a preparation method for microfibrillated fiber-reinforced polymer-based composite materials

Method used

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  • Preparation method of microfibrillated fiber reinforced composite material
  • Preparation method of microfibrillated fiber reinforced composite material
  • Preparation method of microfibrillated fiber reinforced composite material

Examples

Experimental program
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specific Embodiment approach 1

[0020] Specific Embodiment 1: In this embodiment, a method for preparing a microfibrillated fiber-reinforced polymer-based composite material is realized according to the following steps: 1. The fiber is placed in a Soxhlet extractor, extracted and cleaned with acetone for 36 to 48 hours , and then dried at 65-75°C for 25-35 minutes, sealed and stored;

[0021] 2. Put the fibers obtained in step 1 into a beaker, add dimethyl sulfoxide for swelling treatment for 1-4 hours, and obtain microfibrillated fibers after drying;

[0022] 3. Dip the microfibrillated fibers obtained in step 2 into the resin for ultrasonic treatment, and then use the mixture A to perform curing treatment after taking them out, so as to complete the preparation of the microfibrillated fiber-reinforced polymer-based composite material;

[0023] The parameters of step three curing treatment: preheating temperature 90°C, preheating time 120min, molding pressure 5MPa, molding temperature 120°C, molding time 12...

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment is different from Embodiment 1 in that the fiber in step 1 is aramid fiber. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0027] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, extract and wash with acetone for 45 hours, and then dry at 70° C. for 30 minutes. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention discloses a preparation method of a microfibrillated fiber reinforced composite material, belongs to the field of material preparation, and aims to solve the problems of weak shearing performance and impact resistance of the existing fiber reinforced polymer matrix composite material. The method comprises the following steps: 1, cleaning and drying fibers; 2, swelling the fibers anddimethyl sulfoxide, and drying to obtain microfibrillated fibers; and 3, dipping the microfibrillated fibers into resin for ultrasonic treatment, taking out the microfibrillated fibers, and curing themicrofibrillated fibers by using a mixture of resin and a curing agent. The fibers are subjected to microfibrillating treatment so that the microscopic surface area of the fibers is increased, and the resin impregnation efficiency is improved; the interface adhesive force of the fiber and the resin matrix is effectively improved, and the interface performance is improved; the prepared composite material is uniform in matrix, high in density, more excellent in shearing performance and excellent in impact resistance. The method is applied to the field of fiber reinforced composite material preparation.

Description

technical field [0001] The invention belongs to the field of material preparation, and in particular relates to a method for preparing a microfibrillated fiber reinforced composite material. Background technique [0002] In today's world, materials are an important basis for the progress of human civilization and the development of science and technology. Fiber-reinforced polymer-based composites are widely used in military, aerospace, construction and many other industries because they can embody the excellent properties of matrix and reinforcement at the same time. Fiber-reinforced polymer-based composites have many advantages that traditional materials do not have. For example, fiber-reinforced polymer-based composites usually have relatively high specific strength, and such materials are relatively easier to modify. These are traditional Ceramic materials and metal materials do not have. Therefore, fiber-reinforced composite materials are widely used in various aspects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/06C08L63/00C08L77/10
CPCC08J5/06C08J2363/00C08J2477/10
Inventor 黎俊杨洋李美慧黄玉东刘丽
Owner HARBIN INST OF TECH
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