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Silicon dioxide enhanced epoxy resin composite material produced by polysilazane in situ

A technology of polysilazane and epoxy resin, which is applied in the field of polymer composite materials, can solve the problems of easy aggregation of nanoparticles, silica reinforcement, adverse effect of toughening effect, weak interaction between nanoparticles and matrix, etc., to achieve Enhance the effect of interfacial interaction and improve dispersibility

Active Publication Date: 2016-08-10
INST OF ANALYSIS GUANGDONG ACAD OF SCI (CHINA NAT ANALYTICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, most of the composite materials prepared in advance are added to the epoxy resin with silica particles prepared in advance, and because nano-silica is easy to agglomerate during the addition and composite molding process, it will affect the reinforcement of silica, Toughening effects cause adverse effects
However, when siloxane or halogen silane is used as the silicon source to generate silica particles in situ, the interaction between the produced nanoparticles and the matrix is ​​weak, which makes the nanoparticles easy to agglomerate and affects the dispersion effect of the nanoparticles.

Method used

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  • Silicon dioxide enhanced epoxy resin composite material produced by polysilazane in situ
  • Silicon dioxide enhanced epoxy resin composite material produced by polysilazane in situ

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Dissolve 10 parts of polysilazane into 100 parts of bisphenol A glycidyl ether epoxy resin (Shell, EPON 828) under ultrasonic and stirring conditions, and feed water content of 20g / m2 at room temperature 3 Wet nitrogen, wherein the stoichiometric ratio of the amount of water vapor and the amount of polysilazane is about 1.2, polysilazane generates silica nanoparticles in situ, and then add 12.5 parts of diethylenetriamine, mix well, and remove under reduced pressure Bubbles in the system, cured at room temperature for 24 hours, then raised the temperature to 50°C and cured for 24 hours to obtain a silica-reinforced epoxy resin composite material.

Embodiment 2

[0024] Dissolve 1 part of polysilazane into 100 parts of EPON 828 epoxy resin under ultrasonic and stirring conditions, and the water content is 20g / m at room temperature 3 Wet nitrogen, wherein the stoichiometric ratio of the amount of water vapor and the amount of polysilazane is about 1.2, polysilazane generates silica nanoparticles in situ, and then add 12.5 parts of diethylenetriamine, mix well, and remove under reduced pressure Bubbles in the system, cured at room temperature for 24 hours, then raised the temperature to 50°C and cured for 24 hours to obtain a silica-reinforced epoxy resin composite material.

Embodiment 3

[0026] Dissolve 0.1 part of polysilazane into 100 parts of EPON 828 epoxy resin under ultrasonic and stirring conditions, and the water content is 20g / m at room temperature 3 Wet nitrogen, wherein the stoichiometric ratio of the amount of water vapor and the amount of polysilazane is about 1.2, polysilazane generates silica nanoparticles in situ, and then add 12.5 parts of diethylenetriamine, mix well, and remove under reduced pressure Bubbles in the system, cured at room temperature for 24 hours, then raised the temperature to 50°C and cured for 24 hours to obtain a silica-reinforced epoxy resin composite material.

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Abstract

The invention discloses a silicon dioxide enhanced epoxy resin composite material produced by polysilazane in situ. The silicon dioxide enhanced epoxy resin composite material is prepared by a preparation method which comprises the following steps: based on parts by mass, dissolving 0.1 to 50 parts of the polysilazane in 100 parts of epoxy resin, and introducing wet nitrogen to enable the polysilazane to perform an in-situ reaction under 0 to 100 DEG C to generate surface reactive amino group-modified nano-silicon dioxide; then, adding an epoxy resin curing agent to complete the curing the epoxy resin to obtain the silicon dioxide enhanced epoxy resin composite material. The silicon dioxide particles generated in situ do not exceed 10 nanometers; moreover, active amino groups and an epoxy resin substrate react chemically to form a strong reaction to hinder further agglomeration of small silicon dioxide particles, so that the dispensability of the nano-silicon dioxide particles in the epoxy resin can be effectively improved, and the interface interaction of the particles and the epoxy resin is enhanced; therefore, the epoxy resin is enhanced and toughened effectively.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a silicon dioxide reinforced epoxy resin composite material generated in situ by polysilazane. Background technique [0002] Inorganic nano / polymer composite materials occupy an important position in the field of composite materials because they have the advantages of rigidity, thermal stability of inorganic materials, high specific strength and specific modulus, and easy processing of polymer materials to a considerable extent. Nano-silica particles are one of the earliest inorganic substances used to prepare nano-particle-reinforced epoxy resin composites. [0003] At present, most of the composite materials prepared in advance are added to the epoxy resin with silica particles prepared in advance, and because nano-silica is easy to agglomerate during the addition and composite molding process, it will affect the reinforcement of silica, The toughening effect has an ...

Claims

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Application Information

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IPC IPC(8): C08L63/00C08K3/36
CPCC08K3/36C08K2201/011C08L63/00
Inventor 叶小机冉文清孙一峰马艳芳张译方吉国强林文潘文龙牟德海陈江韩
Owner INST OF ANALYSIS GUANGDONG ACAD OF SCI (CHINA NAT ANALYTICAL
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