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Two-component nano-polymer sand-fixing material and sand-fixing method

A technology of nano-polymer and sand-fixing method, which is applied to two-component nano-polymer sand-fixing materials and the field of sand-fixing, can solve the problems of easy cracking and poor impact resistance, and achieves strong durability, good water stability and moderate water absorption. Effect

Active Publication Date: 2017-02-15
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Epoxy resin has good chemical stability, adhesion and processability, but its biggest weakness is brittleness after curing, poor impact resistance and easy cracking
However, there is no report of nano-silica modified polyvinyl alcohol-epoxy resin-polyurethane ternary interpenetrating polymer network, and there is no report of in-situ polymerization to form this material as a chemical sand-fixing agent.

Method used

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  • Two-component nano-polymer sand-fixing material and sand-fixing method
  • Two-component nano-polymer sand-fixing material and sand-fixing method
  • Two-component nano-polymer sand-fixing material and sand-fixing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1 A two-component nano-polymer sand-fixing material, which is composed of component A composed of polyvinyl alcohol-epoxy resin blend modified by inorganic nanoparticles and component B composed of polyurethane prepolymer. in

[0027] Component A refers to dispersing nano-silica with a particle size of 20 nanometers in N,N-dimethylformamide, heating to 80°C, and adding polyethylene with a number-average molecular weight of 160,000 under stirring. Alcohol, after the polyvinyl alcohol is completely dissolved, add epoxy resin and cross-linking agent DMP30 to it in turn, continue to stir for 1 hour and then cool down to room temperature. The ratio of nano-silica to N,N-dimethylformamide is 0.01kg: 400mL, the ratio of nano-silica to polyvinyl alcohol is 0.01kg: 0.15kg, and the ratio of nano-silica to epoxy resin is 0.01kg: 0.25kg; the ratio of nano-silica to DMP30 is 0.01kg: 0.01kg.

[0028] Component B is to add castor oil to N,N-dimethylformamide, heat to 40°C, a...

Embodiment 2

[0030] Example 2 Two-component nano-polymer sand-fixing material, which is composed of component A composed of polyvinyl alcohol-epoxy resin blend modified by inorganic nanoparticles and component B composed of polyurethane prepolymer. in

[0031] Component A refers to dispersing nano-silica with a particle size of 30 nanometers in N,N-dimethylformamide, heating to 100°C, and adding polyethylene with a number-average molecular weight of 140,000 under stirring. Alcohol, after the polyvinyl alcohol is completely dissolved, add epoxy resin and crosslinking agent DMP30 to it in turn, continue to stir for 3 hours and then cool down to room temperature. The ratio of nano-silica to N,N-dimethylformamide is 0.02kg: 250mL, the ratio of nano-silica to polyvinyl alcohol is 0.02kg: 0.2kg, and the ratio of nano-silica to epoxy resin is 0.02kg: 0.22kg; the ratio of nano-silica to DMP30 is 0.02kg: 0.02kg.

[0032] Component B is to add castor oil to N,N-dimethylformamide, heat to 60°C, add...

Embodiment 3

[0034] Example 3 Two-component nano-polymer sand-fixing material, which is composed of component A composed of polyvinyl alcohol-epoxy resin blend modified by inorganic nanoparticles and component B composed of polyurethane prepolymer. in

[0035] Component A refers to dispersing nano-silica with a particle size of 50 nanometers in N,N-dimethylformamide, heating to 90°C, and adding polyethylene with a number-average molecular weight of 170,000 under stirring. Alcohol, after the polyvinyl alcohol is completely dissolved, add epoxy resin and cross-linking agent DMP30 to it in turn, continue to stir for 2 hours and then cool down to room temperature. The ratio of nano-silica to N,N-dimethylformamide is 0.03kg: 350mL, the ratio of nano-silica to polyvinyl alcohol is 0.03kg: 0.25kg, and the ratio of nano-silica to epoxy resin is 0.03kg: 0.15kg; the ratio of nano-silica to DMP30 is 0.03kg: 0.01kg.

[0036] Component B is to add castor oil to N,N-dimethylformamide, heat to 50°C, ad...

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Abstract

The invention relates to a double-component nano high-polymer sand stabilization material which is composed of a component A and a component B, wherein the component A is composed of an inorganic-nanoparticle-modified polyvinyl alcohol-epoxy resin blend, and the component B is composed of a polyurethane prepolymer. The component A is prepared by the following steps: dispersing nano silicon dioxide in N,N-dimethylformamide, heating to 80-100 DEG C, adding polyvinyl alcohol while stirring until the polyvinyl alcohol is completely dissolved, sequentially adding an epoxy resin and a crosslinking agent DMP30, continuing stirring for 1-3 hours, and cooling to room temperature. The component B is prepared by the following steps: adding castor oil into N,N-dimethylformamide, heating to 40-60 DEG C, adding tolyl-2,4-diisocyanate while stirring, continuing stirring to react for 0.5-1.5 hours, and cooling to room temperature. The invention also relates to a sand stabilization method of the material. The sand stabilization material has the characteristics of high sand stabilization strength, high durability, moderate water absorptivity, high water stability and favorable ultraviolet radiation aging resistance under lower consumption conditions.

Description

technical field [0001] The invention relates to the field of desert and desertification control, in particular to a two-component nano-polymer sand-fixing material and a sand-fixing method thereof. Background technique [0002] Land desertification is one of the biggest environmental and socio-economic problems facing the world today, and it is also the largest and most harmful type of desertification in my country. Land desertification not only worsens the fragile ecological environment, but also seriously affects the industrial and agricultural production and people's life in desertified areas. The rapid expansion of desertified land has caused environmental degradation and huge economic losses, and has become a hot spot of global concern. To curb the increasingly rampant trend of desertification, it is necessary to carry out sand fixation. Currently, there are three main methods of sand fixation: engineering sand fixation, plant (biological) sand fixation and chemical s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K17/30E02D3/12C09K105/00
CPCC09K17/30C09K17/40C09K2105/00
Inventor 杜正银武俊成马国富雷自强
Owner NORTHWEST NORMAL UNIVERSITY
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