CN1970685A - Macromolecular sand-fixation agent and method for preparing same - Google Patents

Abstract

The invention discloses a new-typed macromolecular sand-binding agent and making method, which comprises the following steps: adding vinyl acetate, butyl acrylate, acroleic acid and initiator in the composite liquid of deionized water and gelatin; copolymerizing to obtain polymer particle; washing polymer particle; drying to blend with diethylene glycol monoether and ammonia to synthesize the product.

Description

A kind of novel polymer sand fixing agent and preparation method thereof

Technical field

The present invention relates to the chemical sand-fixing technical field, specifically a kind of novel polymer sand fixing agent and preparation method thereof.

Background technology

Chemical sand-fixing; be the surrounding area, desert of easily causing sand damage and cross highway, the railway of desert area and the historic reservation that covered by sand damage easily outside; spray the organic high molecular polymer matrix material; the loose grains of sand are bonded together; form bonding course; prevent that wind-force from raising and moving blowing of the grains of sand, play the effect of tackling quicksand.At present, existing in the world tens countries develop hundred kinds of chemicals, are used for the improvement of drift sand and soil, and it mainly contains following four big classes: grout, water glass class, petroleum products class and high molecular polymer water-absorbing resin class.Grout is used to fix the sand, and has only utilized it to be sprayed at the covering effect after the condensation cure on the Shamian Island.Because desert climate is dry, the temperature height, moisture evaporation is rapid, grout lacks suff water aquation fully, can only form the very low bonding course of intensity, along with the influence of atrocious weather and sand dune migration, bonding course chaps, drying shrinkage and losing fixes the sand and the effect of water conservation, therefore uses grout to fix the sand at present hardly separately; The water glass slurry is that water glass and acid-reaction agent constitute, it is fixed that gel takes place under the highly basic condition, gelation time is short, poor permeability, curing reaction is incomplete, and bonding course intensity is low, so the investigator adds organic to water glass and inorganic coagulation material carries out compound, making modifying water glass is the liquid compound water glass slurries sand-fixation agent that is suitable for spraying, but weak point is also arranged, as: gelation time should not be controlled, gelling is inhomogeneous, bonding course intensity is not high and certain toxicity is arranged.Petroleum products class sand-fixation agent is drawn materials wider, is used for the emulsified bitumen that mainly contains of sand control, directly it is sprayed at Shamian Island and gets final product, and can play to keep desert moisture, absorbs solar heat, improves functions such as plant survival rate.But this sand-fixation agent also exists: depth of penetration is little, forms weak and thin sealer coat at Shamian Island, and intensity is not high, the bad deficiency that waits of stability.Secondly, bonding course becomes fragile, hardens, takes place aging easily and ftractures easily by the wind sapping; High molecular polymer water-absorbing resin class sand fixation material is one of focus of nowadays studying, many countries fix the sand to test at the research and development super absorbent resin, and having developed preferably, material has starch-grafted third rare nitrile, starch-grafted polypropylene acids, cellulose family, polypropylene hydrochlorate, vinyl acetate between to for plastic class etc.

Summary of the invention

A kind of novel polymer sand fixing agent that provides at the deficiencies in the prior art and preparation method thereof is provided, that sand-fixation agent has is nontoxic, quick solidifying, characteristics such as cohesiveness is good, consolidation strength is high, water absorbing and retaining properties is good, flexible, high stability, the preparation method is easy, and production cost is low.

The concrete technical scheme that realizes the object of the invention is:

A kind of novel polymer sand fixing agent, it is to add vinyl acetate, Butyl acrylate, vinylformic acid and initiator in deionized water and gelatin mixed solution, get polymer beads through copolyreaction, polymer beads mixes stirring with diethylene glycol monoethyl ether, ammoniacal liquor and gets after washing, drying.

The preparation method of above-mentioned sand-fixation agent comprises following concrete steps: (described material by weight)

A, mixing

Remove ionized water 165-175 part, 2.0-3.0% gelatin solution 25-35 part and be placed in the reactor and stir, make its thorough mixing.

B, polymerization

Above-mentioned mixed solution is warming up to 70-80 ℃, add vinyl acetate 25-35 part, Butyl acrylate 60-70 part, vinylformic acid 3-7 part, initiator 0.3-0.8 part, react be warming up to after 4 hours 90 ℃ the insulation 2 hours, naturally cool to 40 ℃ with bottom discharge, polymer beads.

C, washing, drying

Above-mentioned polymer beads water is cleaned, dried 4 hours down at 60 ℃.

D, synthetic

With above-mentioned dried polymer beads 95-105 part, deionized water 180-190 part, diethylene glycol monoethyl ether 3.5-4.5 part, be warming up to 85-95 ℃ and drip 28% ammoniacal liquor 7-9 part, stirred 6 hours, get the sand-fixation agent of pH value ≈ 7.5-8.5.

Described initiator is benzoyl peroxide, ammonium persulfate-sodium bisulfite or Potassium Persulphate-hypo.

Described ammonium persulphate-sulfurous acid chlorine sodium is ammonium persulphate 0.18-0.48 part, sodium bisulfite 0.12-0.32 part.

Described Potassium Persulphate-hypo is Potassium Persulphate 0.18-0.48 part, hypo 0.12-0.32 part.

Compared with prior art, the advantage and the effect that have of the present invention:

Because starting material and technical process are selected for use suitably, that sand-fixation agent has is nontoxic, quick solidifying, cohesiveness are good, and the water-absorbing-retaining performance such as stablizes at characteristics, and the preparation method is easy, and production cost is low.The test-results of fixing the sand through Shapotou, Tengger desert edge, Ningxia autonomous region Zhongwei City shows, spray this sand-fixation agent in the desert area that environment is abominable, its resistance to deterioration, perviousness, water tolerance, water-retentivity, freeze-thaw-stability and weather-proof ability are all more intense, and have construction characteristics such as simple, pollution-free, therefore so be the ideal sand fixation material, be adapted at applying in desert engineer and the sand prevention system, for desert engineer and sand prevention system play favourable guarantee.

Embodiment:

Embodiment 1

A, mixing

Remove 30 parts of 170 parts of ionized waters, 2.5% gelatin solution and be placed in the reactor and stir, make its thorough mixing.

B, polymerization

Above-mentioned mixed solution is warming up to 80 ℃, adds 30 parts of vinyl acetates, 65 parts of Butyl acrylates, 5 parts in vinylformic acid, 0.4 part of benzoyl peroxide, react and be warming up to 90 ℃ of insulations 2 hours after 4 hours, naturally cool to 40 ℃ with bottom discharge, must polymer beads.

C, washing, drying

Above-mentioned polymer beads water is cleaned, dried 4 hours down at 60 ℃.

D, synthetic

With 100 parts of above-mentioned dried polymer beads, 185 parts of deionized waters, 4 parts of diethylene glycol monoethyl ethers, be warming up to 90 ℃ and drip 8 parts of 28% ammoniacal liquor, stirred 6 hours, can obtain the sand-fixation agent of pH value ≈ 7.5-8.5.

Embodiment 2

A, mixing

Remove 25 parts of 165 parts of ionized waters, 2.5% gelatin solution and be placed in the reactor and stir, make its thorough mixing.

B, polymerization

Above-mentioned mixed solution is warming up to 75 ℃, add 25 parts of vinyl acetates, 60 parts of Butyl acrylates, 3 parts in vinylformic acid, 0.18 part of ammonium persulphate, 0.12 part of sodium bisulfite react and is warming up to 85 ℃ after 4 hours and is incubated 2 hours, naturally cool to 40 ℃ with bottom discharge, get polymer beads.

C, washing, drying

Above-mentioned polymer beads water is cleaned, dried 4 hours down at 60 ℃.

D, synthetic

With 95 parts of above-mentioned dried polymer beads, 180 parts of deionized waters, 3.5 parts of diethylene glycol monoethyl ethers, drip 7 parts of 28% ammoniacal liquor when being warming up to 85 ℃, stirred 6 hours, can obtain the sand-fixation agent of pH value ≈ 7.5-8.5.

Embodiment 3

A, mixing

Remove 35 parts of 175 parts of ionized waters, 2.5% gelatin solution and be placed in the reactor and stir, make its thorough mixing.

B, polymerization

When being warming up to 85 ℃, above-mentioned mixed solution adds 35 parts of vinyl acetates, 70 parts of Butyl acrylates, 7 parts in vinylformic acid, 0.45 part of Potassium Persulphate, 0.28 part of hypo, react be warming up to after 4 hours 95 ℃ the insulation 2 hours, naturally cool to 40 ℃ with bottom discharge, polymer beads.

C, washing, drying

Above-mentioned polymer beads water is cleaned, dried 4 hours down at 60 ℃.

D, synthetic

With 105 parts of above-mentioned dried polymer beads, 190 parts of deionized waters, 4.5 parts of diethylene glycol monoethyl ethers, drip 9 parts of 28% ammoniacal liquor when being warming up to 95 ℃, stirred 6 hours, can obtain the sand-fixation agent of pH value ≈ 7.5-8.5.

Test of the present invention is carried out in Shapotou, Tengger desert edge, Ningxia autonomous region Zhongwei City, 9.7 ℃ of this area's average temperatures of the whole year, 38.1 ℃ of the highest temperatures, the lowest temperature-25 ℃.This locality is in arid and semiarid zone of transition, sunshine duration in year is longer, about about 270 days, add up to 2729.7 hours sunshine in year, the per day sunshine duration that has 7.5 hours approximately, the sunshine duration the longest is 2942 hours in year, and according to " Chinese weather chart " criteria for classifying, the sunshine duration is 2500 hours in year.Annual rainfall is 186.6mm, and it is about 15 times of rainfall amount that year steam output reaches 2900.7mm.Year ground mean wind speed 2.9m/s is higher than 2m place, and annual mean wind speed 〉=5.0m/s plays husky wind and reaches more than 2900 time in year, spring the wind maximum, take second place summer, winter minimum.Sprinkling is to carry out in the morning, temperature is about 15 ℃ during the sprinkling, the same day, the highest temperature was about 30 ℃, maximum wind speed 5m/s, go to observe when the observation surface has good bonding course by 60 days afternoon, and the place of spraying is no change all, bonding course thickness is 2.5mm～55mm, not only the people can trample in the above, and many directors have gone out little grass, illustrates that the present invention has good penetrating power and water retention capacity.

In order better to observe the performance of fixing the sand of the present invention, after the different temperature influences of 2 year four seasons, observe sand-fixing effect shown in table 1, table 2:

Table 1

The test consumption	Weather-proof ability	Bonding course thickness and Strength Changes
			30g/m 2	The surface bonding course destroys more, and wind erosion is serious	Fixed bed thickness 2mm-2.5mm, hardness is little, and is frangible
35g/m 2	Bonding course has tangible wind erosion vestige, and is more weather-proof	Thick 2.5mm-3.5mm, hardness is big, destroys lessly, and the surface has grass to grow
			40g/m 2	Bonding course has a small amount of wind erosion vestige, and is more weather-proof	Thick 3.5mm-4.5mm, hardness is bigger, destroys and lacks, and the people can walk, and the surface has grass to grow, and water conservation is effective
45g/m 2	Bonding course does not have the wind erosion vestige substantially, and weather-proof ability is strong	Thick 4.5mm-5.5mm, hardness is big, does not have destruction substantially, and the people can walk and trample, and the surface has grass to grow, and water conservation is effective
			50g/m 2	Bonding course does not have the wind erosion vestige, and weather-proof ability is stronger	Thick 5.5mm-6.5mm, hardness is very big, does not have and destroys, and the people can at will walk and trample, and the surface has grass to grow, and water conservation is effective

Table 2

The test consumption	Weather-proof ability	Bonding course thickness and Strength Changes
			100g/m 2	The surface bonding course destroys few, tangible wind erosion vestige is arranged, a little less than the weather-proof ability	Fixed bed thickness 10mm-15mm, hardness is little, and is frangible, and the surface has grass to grow
200g/m 2	Bonding course has the wind erosion vestige, and is more weather-proof	Thick 15mm-25mm, hardness is big, destroys lessly, and the surface has grass to grow
			300g/m 2	Bonding course has does not have the wind erosion vestige substantially, more weather-proof	Thick 25mm-35mm, hardness is bigger, does not have and destroys, and the people can walk, and the no grass in surface grows, and soaking effect is good
400g/m 2	Bonding course does not have the wind erosion vestige, and weather-proof ability is strong	Thick 35mm-45mm, hardness is big, smooth surface, the people can walk and trample, and no grass grows, and soaking effect is good
			500g/m 2	Bonding course does not have the wind erosion vestige, and weather-proof ability is stronger	Thick 45mm-55mm, hardness is very big, and the surface is very smooth, does not have and destroys, and the people can at will walk and trample, and no grass grows,

Sand-fixation agent of the present invention uses common liquid sprinkler to spray and gets final product, and consumption can be with reference to table 1, table 2, and recommending usage quantity is 50g/m ², just can reach good sand-fixing effect.

Claims (3)

1, a kind of novel polymer sand fixing agent, it is characterized in that: in deionized water and gelatin mixed solution, add vinyl acetate, Butyl acrylate, vinylformic acid and initiator, get polymer beads through copolyreaction, polymer beads mixes stirring with diethylene glycol monoethyl ether, ammoniacal liquor and gets after washing, drying.

2, the preparation method of the described novel polymer sand fixing agent of a kind of claim 1 is characterized in that it comprises following concrete steps: (described material by weight)

A, mixing

Remove ionized water 165-175 part, 2.0-3.0% gelatin solution 25-35 part and be placed in the reactor and stir, make its thorough mixing;

B, polymerization

Above-mentioned mixed solution is warming up to 75-85 ℃, add vinyl acetate 25-35 part, Butyl acrylate 60-70 part, vinylformic acid 3-7 part, initiator 0.3-0.8 part, react and be warming up to 85-95 ° of C insulation 2 hours after 4 hours, naturally cool to 40 ℃ with bottom discharge, polymer beads;

C, washing, drying

Above-mentioned polymer beads water is cleaned, dried 4 hours down at 60 ℃;

D, synthetic

With above-mentioned dried polymer beads 95-105 part, deionized water 180-190 part, diethylene glycol monoethyl ether 3.5-4.5 part, be warming up to 85-95 ℃ and drip 28% ammoniacal liquor 7-9 part, stirred 6 hours, get the sand-fixation agent of pH value ≈ 7.5-8.5.

3,, it is characterized in that described initiator is benzoyl peroxide, ammonium persulfate-sodium bisulfite or Potassium Persulphate-hypo according to the preparation method of the described novel polymer sand fixing agent of claim 2.