Preparation method of nano-silica modified graphene oxide/epoxy resin composite material

A nano-silicon dioxide and epoxy resin technology, which is applied in the field of epoxy resin composite material preparation, can solve the problems of poor mechanical properties of epoxy resin, decreased strength properties of epoxy resin composite materials, etc., and achieves enhanced interfacial adhesion. , good enhancement effect, inhibition of re-aggregation effect

Active Publication Date: 2020-10-13
QINGDAO UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the poor mechanical properties of epoxy resin and filler reinforced epoxy resin cause the strength performance of epoxy resin composite material to decline, and provide a Preparation method of graphene oxide / epoxy resin composite material modified by nano-silica

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  • Preparation method of nano-silica modified graphene oxide/epoxy resin composite material
  • Preparation method of nano-silica modified graphene oxide/epoxy resin composite material
  • Preparation method of nano-silica modified graphene oxide/epoxy resin composite material

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specific Embodiment approach 1

[0039] Specific embodiment one: the preparation method of the graphene oxide / epoxy resin composite material of a kind of nano-silica modification of the present embodiment is completed according to the following steps:

[0040] 1. Silanization of nano-silica:

[0041] ①. Disperse nano-silica in a mixture of absolute ethanol and water, and then ultrasonically obtain a nano-silica dispersion;

[0042] ②. Add a silane coupling agent to the nano-silicon dioxide dispersion, and then stir and reflux at a constant temperature of 70°C to 80°C for 6h to 8h to obtain the reaction solution I;

[0043] ③, first wash the reaction solution I, and then vacuum-dry to obtain silane-functionalized nano-silica;

[0044] 2. Nano silica grafted hyperbranched polymer:

[0045] ①. Disperse the silane-functionalized nano-silica in the mixture of methanol and water, and then ultrasonically obtain the silane-functionalized nano-silica dispersion;

[0046] ②. Add N,N'-methylenebisacrylamide to the si...

specific Embodiment approach 2

[0062] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the ultrasonic power described in step one ① is 180W~200W, and the ultrasonic time is 30min~60min; The volume ratio of mass to the mixed solution of absolute ethanol and water is (1g~2g):(100mL~200mL); the volume ratio of absolute ethanol and water in the mixed solution of absolute ethanol and water described in step 1. It is (90~180): (10~20). Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0063] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the silane coupling agent described in step one 2. is 3-aminopropyltriethoxysilane; The mass ratio of the silane coupling agent to the nano-silicon dioxide in the nano-silicon dioxide dispersion liquid is (2-4):(1-2). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a preparation method of a nano silicon dioxide modified graphene oxide/epoxy resin composite material, and relates to a preparation method of an epoxy resin composite material.The invention aims to solve the problems of poor mechanical properties of epoxy resin and strength performance reduction of an epoxy resin composite material caused by filler reinforced epoxy resin.The method comprises the following steps: 1, silanizing nano silicon dioxide; 2, grafting a hyperbranched polymer on the nano silicon dioxide; 3, preparing a graphene oxide-nano silicon dioxide hybridmaterial; and 4, carrying out compounding. According to the preparation method, the problem of weak interface strength between graphene oxide and epoxy resin can be solved, and by comparison, the graphene oxide-nano silicon dioxide hybrid material has a better enhancement effect than pure graphene oxide or nano silicon dioxide. The preparation method is suitable for surface modification of graphene oxide and preparation and application of an epoxy resin composite material.

Description

technical field [0001] The invention relates to a preparation method of epoxy resin composite material. Background technique [0002] As a general purpose material, epoxy resin has been widely used in civilian and military fields. However, epoxy resins are inherently brittle due to the high crosslink density after curing. Epoxy resins for engineering applications are usually limited by their brittleness and poor electrical and thermal properties. In addition, the lack of toughness is the main reason that hinders the widespread use of epoxy resins in various applications. Therefore, the toughening of epoxy resin has become a research hotspot and has aroused the interest of many scholars. In general, the most common way to enhance mechanical properties is to add fillers to epoxy resins. When the epoxy acts as a matrix, the filler acts as a toughening phase to toughen the epoxy. In recent years, many different fillers have been investigated as second phases, including grap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K9/04C08K9/06C08K3/36C08K3/04
CPCC08K9/08C08K9/06C08K3/36C08K3/042C08K2201/011C08L63/00
Inventor 马丽春王明业张文健张协宸蔡岳炀张莹莹林枝华
Owner QINGDAO UNIV
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