Epoxy resin-based nanometer composite material and preparation method thereof

A nano-composite material and epoxy resin technology, applied in the field of materials, can solve the problems of high cross-linking density, poor impact resistance, large internal stress, etc., and achieve the effect of simple preparation process steps, good process repeatability and stable material performance

Inactive Publication Date: 2015-06-03
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its high crosslinking density after curing, it exhibits the disadvantages of large internal stress and poor impact resistance, and it is difficult to meet the application requirements in advanced composite materials and other fields.
[0003] The main EP toughening method that has appeared in the past is thermoplastic resin toughening technology, which is relatively mature in basic research and application development. However, this technology will reduce the heat resistance and heat resistance of the corresponding cured product while achieving a significant increase in impact strength. Modulus; interpenetrating network polymer (IPN) toughening technology is only suitable for IPN formed by epoxy prepolymer with lower equivalent weight; thermotropic liquid crystal polymer (TLCP) toughened epoxy resin as a The new technology has broad prospects and inherent potential in principle analysis, but experiments have found that while improving the toughness, the flexural modulus remains basically unchanged, and the cured product is a multi-phase structure, so it is difficult to coordinate the improvement of mechanical properties; emerging The in-situ polymerization technology adopts the uniform dispersion of nascent rigid polymers in the rigid resin matrix to obtain composite toughening at the excimer level, which is a new way to modify brittle polymers to obtain high-strength and high-toughness polymers , good performance; similar to the in-situ polymerization technology, the use of layered inorganic materials to prepare organic-inorganic hybrid composites through intercalation to improve the comprehensive performance of polymers has become a research hotspot in the field of polymers, and it is convenient and easy. OK, the composite material achieved has excellent performance and can be widely used

Method used

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Experimental program
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Effect test

preparation example Construction

[0048] The preparation method of epoxy resin-based nanocomposite material of the present invention, specifically implement according to the following steps:

[0049] step 1

[0050] Inorganic nano rectorite was treated with long-chain dodecyl dimethyl benzyl ammonium chloride (trade name 1227) to obtain organic rectorite, and then organic rectorite, E-51 prepolymer, 2-Ethyl-4-methylimidazole was dried to constant weight on the analytical balance; organic rectorite, 2-ethyl-4-methylimidazole, E-51 prepolymer, and organic The mass of rectorite accounts for 1%-9% of the total mass, 2-ethyl-4-methylimidazole and E-51 prepolymer account for 91%-99% of the total mass, and the sum of the mass percentages of the above components is 100%; wherein, according to the mass percentage, the weighed 2-ethyl-4-methylimidazole accounts for 3.5%-5% of the mass of 2-ethyl-4-methylimidazole and E-51 prepolymer, so The weighed E-51 prepolymer accounts for 95%-96.5% of the mass of 2-ethyl-4-methyl...

Embodiment 1

[0081] Inorganic nano-rectorite was treated with long-chain dodecyl dimethyl benzyl ammonium chloride to obtain organic rectorite, and then organic rectorite, E-51 prepolymer, 2-ethyl- 4-methylimidazole was dried to constant weight on the analytical balance; according to mass percentage, 1% organic rectorite, 3.465% 2-ethyl-4-methylimidazole, 95.535% E-51 pre- Polymer; Clean the mold for pouring, apply the release agent, and put it in an oven at 80°C for standby; put the E-51 prepolymer in a beaker and stir and heat at 80°C for 30min. Put in the weighed amount of organic rectorite, continue to stir at 80°C for 30min, move the beaker to an 80°C oven and continue to infiltrate for 6h; drop in 2-ethyl-4-methyl imidazole, continue to stir for 5 minutes, move the beaker to an 80°C vacuum oven, and vacuumize for 15 minutes; after observing the escape of bubbles, quickly remove the beaker from the oven, pour the reaction mixture into a mold, and move the mold to an 80°C oven. Vacuum...

Embodiment 2

[0084] Inorganic nano-rectorite was treated with long-chain dodecyl dimethyl benzyl ammonium chloride to obtain organic rectorite, and then organic rectorite, E-51 prepolymer, 2-ethyl- 4-methylimidazole was dried to constant weight on the analytical balance; according to mass percentage, 9% organic rectorite, 3.185% 2-ethyl-4-methylimidazole, 87.815% E-51 pre- polymer; clean the mold for pouring, apply the release agent, and place it in an oven at 100°C for later use; put the E-51 prepolymer in a beaker and stir and heat it at 100°C for 10 minutes. Put in the weighed amount of organic rectorite, continue to stir at 100°C for 10min, move the beaker to a 100°C oven and continue to infiltrate for 4h; drop in the weighed amount of 2 -Ethyl-4-methylimidazole, continue to stir for 10 minutes, move the beaker to a vacuum oven at 100°C, and vacuum for 10 minutes; after observing the escape of bubbles, quickly remove the beaker from the oven, and pour the reaction mixture into the mold...

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PUM

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Abstract

The invention discloses an epoxy resin-based nanometer composite material. The epoxy resin-based nanometer composite material comprises the following materials in percentage by weight: 91%-99% of E-51 type epoxy resin matrix and 1%-9% of organic rectorite, wherein the E-51 type epoxy resin matrix comprises the following components in percentage by weight (based on 100% of the total weight of the components): 3.5%-5% of 2-ethyl-4-methyl imidazole and 95%-96.5% of E-51 prepolymer. The invention further discloses a preparation method of the composite material. The preparation method of the composite material comprises the following steps of: heating up the E-51 prepolymer; adding the heated E-51 prepolymer to the organic rectorite for continuously stirring and moving a beaker to an oven for 4 hours to 6 hours; dropping 2-ethyl-4-methyl imidazole for continuously stirring, and moving the beaker to the vacuum oven for vacuum-pumping; moving out the beaker and casting the reaction mixture to a mould, moving the mould to the oven for carrying out vacuum-pumping on the oven, and starting curing; and flatly placing the oven under room temperature to obtain the epoxy resin-based nanometer composite material. The prepared epoxy resin-based nanometer composite material is good in comprehensive performance, good in flame resistance and heat resistance, and can be used for conventional EP (Epoxy Resin).

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to an epoxy resin-based nanocomposite material modified by organic rectorite, and also relates to a preparation method of the composite material. Background technique [0002] Epoxy resin (EP) contains two or more epoxy groups in its molecular structure. Due to its excellent mechanical properties, heat resistance and chemical stability, it is currently the most widely used One of the applied resins. As a commonly used resin for heavy-duty anti-corrosion coatings, it solves many major corrosion engineering problems. However, due to its high crosslinking density after curing, it exhibits the disadvantages of large internal stress and poor impact resistance, and it is difficult to meet the application requirements in advanced composite materials and other fields. [0003] The main EP toughening method that has appeared in the past is thermoplastic resin toughening technology, which i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08G59/50C08K9/04C08K3/34
Inventor 冯拉俊王娟娟马晓燕
Owner XIAN UNIV OF TECH
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