Method for preparing carbon fiber reinforced inorganic polymer based composite material

An inorganic polymer and composite material technology, applied in cement production and other directions, can solve the problems of easy entanglement and agglomeration, uneven distribution, low bearing capacity, etc., and achieve the effect of increasing fiber content, high material strength, and uniform distribution

Inactive Publication Date: 2008-05-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The present invention solves the problems of low mechanical strength, low toughness, low bearing capacity and low application reliability of inorganic polymer materials; and solves the problem that the existing carbon fiber has a large aspect ratio, is not easy to disperse, and is easily entangled and agglomerated in the process of stirring and mixing with the matrix. It is broken, which causes its distribution in the inorganic polymer material matrix to be uneven, resulting in the problem of low strengthening effect

Method used

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specific Embodiment approach 1

[0010] Specific Embodiment 1: The preparation method of carbon fiber reinforced inorganic polymer matrix composite material in this embodiment is realized by adopting the following steps:

[0011] Step 1, configuring inorganic polymer batch materials: according to the molar ratio of potassium hydroxide and deionized water of 1:4 to 1:8, it is configured into a solution, and according to the molar ratio of silicon dioxide and potassium hydroxide of 0:1 to 6: 1 Add amorphous silica powder to the above solution, stir magnetically for 72-120 hours to obtain a mixed solution, place the container containing the mixed solution in an ice-water bath at a temperature of 0-5°C, The molar ratio of potassium oxide is 1:2~1:1. Add metakaolin powder to the mixed solution, and mechanically stir for 20~40min to obtain an inorganic polymer batch with a silicon / aluminum ratio of 1:1~4:1. Ion water adjusts the viscosity of the batch so that the shear rate is 60-80S -1 between 150mPa·s~500mPa·s; ...

specific Embodiment approach 2

[0016] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, 24.98g of potassium hydroxide is dissolved in 36ml of water to obtain potassium hydroxide solution, and 24g of amorphous silicon dioxide with an average particle diameter of 2.3 μm The powder was added to the potassium hydroxide solution, stirred magnetically for 72 hours to obtain a mixed solution, the container containing the mixed solution was placed in an ice-water bath with a temperature of 0°C, and 44.4g of metakaolin with an average particle size of 4.08μm was mechanically Slowly add into the mixed solution by stirring, and after 30 minutes of high-speed stirring, the silicon / aluminum ratio is 2:1 Inorganic polymer material batch is obtained, and the viscosity of the batch is adjusted by adding deionized water at a shear rate of 70S -1 200mPa·s; in step 2, ultrasonically disperse the 7mm chopped carbon fiber and absolute ethanol with a mass ratio of 1:20000 in absolute ethanol...

specific Embodiment approach 3

[0018] Embodiment 3: The difference between this embodiment and Embodiment 2 is that the length of the chopped carbon fiber in step 2 is 2 mm. Others are the same as in the second embodiment.

[0019] The density of the composite material prepared in this embodiment is 1.41g / cm 3 , with a fiber volume content of 5.3%, the flexural strength and fracture work of the composite material reach 61.5MPa and 4143.0J / m respectively 2 , 3.67 times and 76.4 times higher than the unreinforced matrix material.

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Abstract

A preparation method of carbon fiber reinforced inorganic polymer composite relates to a preparation method of inorganic polymer composite. The method solves following problems: low mechanical strength, low ductility, low bearing capacity, low application reliability of the inorganic polymer composite; large aspect ratio, easiness to be winded and agglomerated even be fractured during the preparation process, uneven distribution in an inorganic polymer composite matrix and low strengthening effect of existing carbon fiber. The preparation method of the invention is: firstly, to prepare batch of the inorganic polymer and regulate the viscosity of the batch through deionized water; secondly, to prepare chopped carbon fiber prefabrication; thirdly, to prepare a composite green body which includes a plurality of carbon fiber prefabrication layers; fourthly, to add vacuum pressure on the green body and dry the green body to produce the carbon fiber reinforced inorganic polymer composite. The invention overcomes the carbon fiber agglomeration and fracture problems of a conventional strong agitation method. The composite prepared through the invention has the advantages of high carbon fiber content, even distribution, high material strength and good ductility.

Description

technical field [0001] The invention relates to a preparation method of an inorganic polymer matrix composite material, in particular to a preparation method of a carbon fiber reinforced inorganic polymer matrix composite material. Background technique [0002] Inorganic polymer materials have been applied in the fields of construction and refractory materials due to their low density, low cost, flame retardancy, and the ability to be prepared at low temperatures but used at high temperatures, and are considered to be the most promising alternatives Polymer materials are one of the materials used in spacecraft, ships and interior cabins of automobiles. However, its inherent brittleness, low mechanical strength and toughness severely limit its wide application in the field of high-tech materials that require a certain load capacity and high reliability. Chopped carbon fiber has the characteristics of high specific strength, high specific modulus, and large aspect ratio. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B14/38
CPCC04B14/386C04B28/006Y02P40/10C04B20/0076C04B40/0071C04B40/0089C04B40/0263C04B20/02
Inventor 贾德昌林铁松
Owner HARBIN INST OF TECH
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