Graphene-silica hybrid material and method for preparing polyurethane based nanocomposite

A nanocomposite material, silica technology, applied in the direction of nanotechnology, can solve problems such as easy agglomeration, inability to fully utilize the excellent performance of graphene, and reduce the performance of matrix resin, so as to promote dispersion, excellent mechanical properties and thermal properties, The effect of inhibiting agglomeration

Inactive Publication Date: 2016-12-14
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the nano-size effect and high specific surface energy of graphene and its derivatives, it is easy to agglomerate in the TPU matrix, which not only cannot give full play to the excellent performance of graphene, but also reduces the performance of the matrix resin.

Method used

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  • Graphene-silica hybrid material and method for preparing polyurethane based nanocomposite
  • Graphene-silica hybrid material and method for preparing polyurethane based nanocomposite
  • Graphene-silica hybrid material and method for preparing polyurethane based nanocomposite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of graphite oxide: Add 115mL of 98% concentrated sulfuric acid into a dry beaker, cool it to below 4°C with an ice-water bath, add 5g NGP and 2.5g NaNO under vigorous stirring 3 The mixture, and then slowly add 15g KMnO 4 , and control the temperature of the reaction system below 20°C, continue to stir the reaction for 5min, then raise the system temperature to (35±3)°C, stir at constant temperature for 30min, then add 230mL of deionized water under vigorous stirring. Transfer the above system into a heated oil bath, keep the system reaction temperature at about 98°C for 15 minutes, then add 355mL hot deionized water for high-temperature hydrolysis, add 30mL H 2 o 2 Neutralize the unreacted strong oxidant, suction filter while hot, wash thoroughly with 5% hydrochloric acid and deionized water, and dry in a vacuum oven at 90°C for 24 hours to obtain graphite oxide.

[0032]Preparation of graphene-silica hybrid material: Dissolve a certain amount of silicon ...

Embodiment 2

[0041] The preparation of graphite oxide and graphene-silicon dioxide hybrid material is the same as in Example 1. During the preparation of the nanocomposite, 0.15g of graphene-silicon dioxide hybrid material and 29.85g of TPU were melt blended in the same process as in Example 1 to obtain a nanocomposite with a filler mass content of 0.5%. The test sample preparation and test conditions of the nanocomposite material are the same as in Example 1, and the tensile test results are shown in Table 1. It can be seen that compared with pure TPU, the 1000% modulus stress of the nanocomposite obtained by using the graphene-silica hybrid material is increased by 6.77%. And it is higher than the composite material obtained by using silica alone as filler under the same content.

[0042] The composition and thermal properties of the polyurethane-based nanocomposite in the present invention are as follows: Figure 2a , Figure 2b and as shown in Table 2:

[0043] Table 2 Composition ...

Embodiment 3

[0047] The preparation of graphite oxide and graphene-silicon dioxide hybrid material is the same as in Example 1. During the preparation of the nanocomposite material, 0.3 g of graphene-silica hybrid material and 29.7 g of TPU were melt blended in the same process as in Example 1 to obtain a nanocomposite material with a filler mass content of 1%. The test sample preparation and test conditions of the nanocomposite material are the same as in Example 1, and the tensile test results are shown in Table 1. It can be seen that compared with pure TPU, the 1000% modulus stress of the nanocomposite obtained by using the graphene-silica hybrid material is increased by 12.58%. And it is higher than the composite material obtained by using silica alone as filler under the same content.

[0048] The thermal performance test results are shown in Table 2. It can be seen that compared with pure TPU, the thermal properties of nanocomposites obtained by using graphene-silica hybrid materia...

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Abstract

The invention relates to a melt blending modification of polyurethane resin material, in particular to a graphene-silica hybrid material and a method for preparing a polyurethane based nanocomposite. The graphene-silica hybrid material is obtained through reaction of graphene oxide, silicon dioxide and 3- aminopropyltriethoxysilane; functional 3-aminopropyltriethoxysilane monomers is a bridge for linking silica and graphene oxide; the nanocomposite is obtained by by a melt blending method by using graphene-silica hybrid material as a filler and polypropylene resin as a matrix. The polymer matrix and filler of the invention have rich sources and low cost; the mutual barrier effect of graphene-silica to inhibit the aggregation of each other is given full play to, and obvious synergistic strengthening and toughening effect is applied on the TPU substrate. The preparation method is simple, easy to operate, and can be widely used; and the obtained nanocomposite has excellent mechanical properties and thermal properties.

Description

technical field [0001] The invention relates to the melt-blending modification of polyurethane resin materials, in particular to a graphene-silicon dioxide hybrid material and a method for preparing polyurethane-based nanocomposite materials. Background technique [0002] Thermoplastic polyurethane (TPU) is a widely used thermoplastic resin, which has excellent properties such as wide source of raw materials, low price, and easy processing and molding. However, the low tensile strength, insufficient thermal stability, and uncontrollable deformation recovery of TPU limit the application of TPU in some fields. In order to broaden the application field of TPU and increase the added value of TPU, its modification is the main research direction of TPU at present. Among them, melt blending has simple technology and is suitable for large-scale industrial production, so it has become the main technical method of TPU modification. Among the many TPU melt blending methods, adding hi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/04C08K9/06C08K3/36C08K7/00C08K3/04B29B7/00B82Y40/00
CPCC08K9/06B29B7/002B82Y40/00C08K3/04C08K3/36C08K7/00C08K2201/011C08L2201/08
Inventor 卞军周醒蔺海兰王正君肖文强
Owner XIHUA UNIV
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