Reinforced magnesium phosphate cement composite material and preparation method thereof

A technology of magnesium phosphate cement and composite materials, applied in the field of new building materials, can solve the problems of low strength and inapplicability, and achieve the effects of high strength, sufficient reaction and good durability

Active Publication Date: 2020-12-08
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Magnesium phosphate cement is usually composed of magnesium oxide, phosphate, retarder and other components, which leads to many reinforcement methods that can be used in Portland cement, which become inapplicable in magnesium phosphate cement
However, the strength of magnesium phosphate cement is lower than that of Portland cement, so it is urgent to strengthen and modify, and there are few reports on the enhancement method of magnesium phosphate cement at the nanometer level.

Method used

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  • Reinforced magnesium phosphate cement composite material and preparation method thereof
  • Reinforced magnesium phosphate cement composite material and preparation method thereof
  • Reinforced magnesium phosphate cement composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0035] This embodiment provides oxidized graphene / carbon nanotube to improve the magnesium phosphate cement composite, including oxide / carbon nanotube composite modifier, magnesium phosphate cement dry material, wherein the oxide / carbon nanotube recombination The modifier is compounded by a small amount of oxide oxide and multi-walled carbon nanotubes, and the ratio of small carbon oxide and multi-walled carbon nanotubes is 1: 1. In the case of specific implementation, the number of monomeric oxide oxide or single-walled carbon nanotubes can also be selected from the form of the present invention. The ratio of the total dry weight of the merchandise of the product is 0.05: 100. Water and magnesium phosphate dry material mass ratio is 0.15. The magnesium phosphate cement dry material consists of a buffenagnesium oxide, boron sand and pelletine dihydrogen phosphate, and the phosphate cement dry material can be used in a commercially available group, and the present embodiment ...

Embodiment 2

[0043]This embodiment provides oxidized graphene / carbon nanotube to improve the magnesium phosphate cement composite, including oxide / carbon nanotube composite modifier, magnesium phosphate cement dry material, wherein the oxide / carbon nanotube recombination The modifier is compounded by a small amount of oxide oxide and multi-walled carbon nanotubes, and the ratio of small carbon oxide and multi-walled carbon nanotubes is 1: 1. The total dry weight of the dry material with the magnesium phosphate cement dry parts by weight of the product less than the mass of the graphene oxide layers and multi-walled carbon nanotubes is 0.1: 100. Water and magnesium phosphate dry material mass ratio is 0.15. Magnesium phosphate cement by the dry feed dead burned magnesium oxide, borax and potassium dihydrogen phosphate composition. The specific ratio of each component of the present embodiment is shown in Table 1.

[0044] The above-mentioned oxide-oxide / carbon nanotubes can be prepared ...

Embodiment 3

[0051] This embodiment provides the graphene oxide / nanotube synergistic magnesium phosphate cement composites, the present embodiment differs from embodiment 1 in that the polycarboxylate superplasticizer is added, the polycarboxylate superplasticizer dry matter of magnesium phosphate cement parts by weight ratio of 0.1: 100, other conditions are the same as in Example 1. The specific ratio of each component of the present embodiment is shown in Table 1.

[0052] Graphene oxide / nanotube synergistic magnesium phosphate cement composite materials can be prepared using the following procedure:

[0053] The oxide in grapiele solution having a concentration of 0.05 g / L was prepared.

[0054] The carbon nanotubes were added to the oxide oxide insertion solution After mixing in the beaker, stirred with a glass rod to a flovent visible visible to the coffee eye, add an ultrasonic dispersion to prepare an oxide oxide / carbon nanotube composite modifier, depending on the amount of so...

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Abstract

The invention provides a reinforced magnesium phosphate cement composite material and a preparation method thereof, the composite material comprises a graphene oxide/carbon nanotube composite modifierand a magnesium phosphate cement dry material, the graphene oxide/carbon nanotube composite modifier is compounded by graphene oxide and carbon nanotubes, The ratio of the total dry weight of the graphene oxide and the carbon nanotubes to the dry weight of the magnesium phosphate cement dry material is 0.01-0.5: 100. The method comprises the following steps: preparing the graphene oxide/carbon nanotube composite modifier; mixing the prepared graphene oxide/carbon nanotube composite modifier with the magnesium phosphate cement dry material, and uniformly stirring to obtain cement paste; pouring the cement paste into a mold for shaping, removing bubbles through oscillation, covering the surface of the mold with a film, demolding after curing, and finally curing to the use age. The preparedmagnesium phosphate cement is high in strength and good in mechanical property, the internal structure is neat and compact, the pore structure is optimized, and the durability is good.

Description

Technical field [0001] The present invention relates to the technical field of building new materials, and Background technique [0002] The phosphate cement has a strong durability, high strength, no pollution, speed strength, strong adhesion, good compatibility, good biocompatibility, etc., in rescue disaster relief, structural repair and biomedical, etc. The application is very rich in the scene. The reaction mechanism of the magnesium phosphate cement is a acid-base reaction, forming a chemical bond to generate a gelation effect. The strength is mainly providing a compound of magnesium phosphate and the like. [0003] The magnesium phosphate cement is usually composed of groups of magnesium oxide, phosphate, and slower. The magnesium phosphate cement and conventional silicate cement are different from the gelation principle of the calcium hydrated silicate, and the reaction mechanism of magnesium phosphate cement is acid-base reaction, forming a chemical bond-connected compou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/34C04B14/02C04B24/24C04B103/30
CPCC04B28/34C04B14/024C04B14/026C04B24/24C04B2103/302C04B22/002
Inventor 杜宇航杨健李粒珲李环宇
Owner SHANGHAI JIAO TONG UNIV
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