Carbon nanometer tube modified resin/glass fiber composite reinforcement material and preparation method thereof

A carbon nanotube modification, glass fiber technology, applied in the field of structural engineering, can solve problems such as hindering application, low elastic modulus and shear strength

Active Publication Date: 2012-10-10
HOHAI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low elastic modulus and shear strength of GFRP tendons seriously hinder its application in concrete structural engineering

Method used

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  • Carbon nanometer tube modified resin/glass fiber composite reinforcement material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Carbon nanotube modified resin / glass fiber composite reinforcement is made of 70% by weight continuous glass fiber (model A-Glass, purchased from Owens Corning OCV TM businesses) and 30% modified resin matrix material; the modified resin matrix material is carbon nanotube modified epoxy resin (for the modification process, refer to "Multi-walled carbon nanotube modified epoxy resin adhesive Experimental Research", Journal of Composite Materials, Issue 3, 2011).

[0017] The preparation method of the carbon nanotube modified resin / glass fiber composite reinforcement comprises the following steps: the continuous glass fiber first impregnates the carbon nanotube modified epoxy resin solution in the dipping device through the wire plate, and the carbon nanotube modified epoxy resin solution is mixed with the carbon nanotube modified The epoxy resin is glued, and then prepared into ribs by pultrusion process. Before curing, the glass fiber is unidirectionally wound on the s...

Embodiment 2

[0020] The carbon nanotube modified resin / glass fiber composite reinforcement is formed by gluing multiple strands of 80% by weight continuous glass fiber filaments (A-Glass) and 20% by weight of modified resin matrix materials; the modified resin matrix The material is urethane-modified vinyl ester resin modified by carbon nanotubes (the modification refers to the literature as in Example 1), and the preparation method is the same as in Example 1.

[0021] The control test results of modified GFRP bars and unmodified GFRP bars showed that the ultimate tensile strength increased by 12%, and the ultimate elongation increased by 8%. The modulus of elasticity increased by 20%, and the shear strength increased by 7%.

Embodiment 3

[0023] The difference from Example 1 is that the carbon nanotube modified resin / glass fiber composite reinforcement is formed by gluing 75% by weight of continuous glass fiber and 25% by weight of modified resin matrix material.

[0024] The control test results of modified GFRP bars and unmodified GFRP bars showed that the ultimate tensile strength increased by 13%, and the ultimate elongation increased by 9%. The modulus of elasticity increased by 30%, and the shear strength increased by 10%.

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Abstract

The invention relates to a carbon nanometer tube modified resin/glass fiber composite reinforcement material which consists of 70-80 percent of two types of continuous glass fibers and 20-30 percent of modified resin base material; the modified resin base material is carbon nanometer tube modified resin; and the resin is epoxy resin or carbamate modified vinyl ester resin. A preparation method comprises the preparation processes of: preparing and forming through a pultrusion process after the two types of continuous glass fibers are glued with the modified resin base material, unidirectionally winding the continuous glass fibers by using winding equipment before solidification and forming threads on the surface of the reinforcement material; and fully dipping surface fibers of the reinforcement material through secondary glue dipping to obtain the carbon nanometer tube modified resin/glass fiber composite reinforcement material. The obtained modified GFRP (Glass Fiber Reinforced Polymer) reinforcement material has the beneficial effects that the ultimate tensile strength and the ultimate elongation rate are improved, and particularly, the elastic modulus and the cutting strength are improved.

Description

technical field [0001] The invention belongs to the technical fields of structural engineering such as civil engineering, water conservancy and hydropower, and traffic engineering, and relates to a reinforcement modification for reinforced concrete structures, in particular to a carbon nanotube modified resin / glass fiber composite reinforcement and a preparation method thereof. Background technique [0002] Due to the simple construction, low price and high compressive strength, reinforced concrete has become the most widely used structural form in engineering. However, the corrosion of steel bars has a serious impact on the durability of reinforced concrete. In order to solve the problem of steel bar corrosion in reinforced concrete, domestic and foreign scholars have proposed many research countermeasures and measures. It is considered to be a relatively effective method to replace ordinary steel bars and prestressed steel bars with fiber composite (FPR) bars. Glass fiber ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/10C04B14/42
Inventor 刘小艳刘爱华周茂昆蒋亚清夏苏鲁
Owner HOHAI UNIV
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