Preparation method for alumina/quartz glass composite fiber

A quartz glass and composite fiber technology is applied in the field of preparation of alumina/quartz glass composite fibers, which can solve the problems of affecting the long-term performance and strength stability of composite materials, losing the reinforcing effect of concrete, affecting high-temperature service performance, etc. Convenience, stable performance, short time effect

Inactive Publication Date: 2012-10-03
TIANJIN POLYTECHNIC UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For quartz fiber-reinforced cement-based composites, quartz fibers precipitate Ca(OH) during Portland cement hydration 2 There is a potential for corrosion in the formed alkaline environment, causing the quartz fiber to quickly lose its reinforcing effect on concrete, which will directly affect the long-term performance and strength stability of the composite material, while the alkali of the cement matrix to the quartz fiber Corrosion usually includes chemical and physical effects; for filters and containers reinforced with quartz fibers, they are also easily corroded when filtering and holding some alkaline liquids, and the corrosion is mainly due to chemical effects; quartz fibers are often in In a high-temperature working environment, under the action of high temperature, the quartz fiber has a thermal degradation tendency, which affects its high-temperature performance and becomes stiff and brittle. This fatal shortcoming severely limits its development and application

Method used

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  • Preparation method for alumina/quartz glass composite fiber
  • Preparation method for alumina/quartz glass composite fiber
  • Preparation method for alumina/quartz glass composite fiber

Examples

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Embodiment 1

[0031] A preparation method of alumina / quartz glass composite fiber, the method steps are as follows:

[0032] (1) Quartz fiber surface pretreatment;

[0033] The acid etching pretreatment process is used to pretreat the fiber surface to remove the sizing agent on the fiber surface. Take a certain amount of quartz fibers and put them into dilute sulfuric acid solution with a mass fraction of 2%, soak them for 1 hour at a constant temperature of 98°C, take them out and cool them, wash them with deionized water until they are neutral, dry them in an oven at 80°C, and then Natural cooling to room temperature;

[0034] (2) preparing boehmite sol;

[0035] ① Weigh the raw materials, and the AlCl 3 ·6H 2 Dissolve O in water, add aluminum powder, AlCl after fully hydrolyzed 3 ·6H 2 The molar ratio of O and metal Al powder is 1:2, in a constant temperature water bath at 100°C, mechanically stirred and refluxed for 10h to form a colloidal mother liquor;

[0036] ② Filter the mot...

Embodiment 2

[0041] A preparation method of alumina / quartz glass composite fiber, the method steps are as follows:

[0042] (1) Quartz fiber surface pretreatment;

[0043] The acid etching pretreatment process is used to pretreat the fiber surface to remove the sizing agent on the fiber surface. Take a certain amount of quartz fibers and put them into dilute sulfuric acid solution with a mass fraction of 6%, soak them for 1 hour at a constant temperature of 98°C, take them out and cool them, wash them with deionized water until they are neutral, dry them in an oven at 80°C, and then Natural cooling to room temperature;

[0044] (2) preparing boehmite sol;

[0045] ① Weigh the raw materials, and the AlCl 3 ·6H 2 Dissolve O in water, add aluminum powder, AlCl after fully hydrolyzed 3 ·6H 2 The molar ratio of O and metal Al powder is 1:2.5, in a constant temperature water bath at 100°C, mechanically stirred and refluxed for 10 hours to form a colloidal mother liquor;

[0046] ② Filter ...

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Abstract

The invention discloses a preparation method for alumina / quartz glass composite fiber and belongs to the field of inorganic fiber. The preparation method comprises the steps as follows: 1, pretreating quartz fiber with a dilute sulfuric acid solution; 2, preparing boehmite sol through a sol-gel method by taking AlCl3.6H2O, metal Al powder, lactic acid and H2O as raw materials; and 3, impregnating the pretreated quartz fiber in the boehmite sol, drying and conducting heat treatment to obtain the alumina / quartz glass composite fiber. The preparation method has the advantages of simple process, convenience in operation and low energy consumption, and the tensile strength and the alkaline resistance of the prepared composition fiber are greatly improved in comparison with those of the quartz fiber.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, in particular to a preparation method of alumina / quartz glass composite fiber. technical background [0002] Quartz fiber is a SiO 2 High content of glass fiber, with excellent performance, is widely used in cement-based reinforced composite materials, filter screens, and reinforced resin composite materials and other fields. For quartz fiber-reinforced cement-based composites, quartz fibers precipitate Ca(OH) during Portland cement hydration 2 There is a potential for corrosion in the formed alkaline environment, causing the quartz fiber to quickly lose its reinforcing effect on concrete, which will directly affect the long-term performance and strength stability of the composite material, while the alkali of the cement matrix to the quartz fiber Corrosion usually includes chemical and physical effects; for filters and containers reinforced with quartz f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C25/42C04B14/42
Inventor 梁小平王化平王家丹刘建任素娥李冬梅左蕊李建新
Owner TIANJIN POLYTECHNIC UNIV
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