Water-retaining material, preparation method thereof and application of water-retaining material in soil moisture retention
A technology of water-retaining materials and raw materials, applied in applications, soil conditioning materials, chemical instruments and methods, etc., can solve problems such as poor salt and alkali resistance, low water retention rate, and high cost
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[0031] The present invention also provides a method for preparing a water-retaining material, comprising the following steps:
[0032] 1) mixing modified coal gangue with magnesium phosphate cement, adding water and stirring to obtain a mixture;
[0033] 2) adding carboxymethyl cellulose into water for heating treatment to obtain a transparent solution, adding the mixture obtained in step 1), chitosan and montmorillonite in sequence to the transparent liquid, and stirring to obtain a water-retaining material.
[0034] The preparation method of the modified coal gangue in step 1) is as follows: the coal gangue is roasted at 450-500° C. for 10-20 min, and then pulverized after cooling to obtain the modified coal gangue.
[0035] The particle size of the modified coal gangue is 1-5mm.
[0036] The solid-liquid ratio of the mixture described in step 1) is 1:(0.02-0.08).
[0037] In step 2), the mass ratio of carboxymethyl cellulose to water is 1:(5-6).
[0038] The heat treatme...
Embodiment 1
[0043] 25 parts of modified coal gangue, 16 parts of carboxymethyl cellulose, 10 parts of magnesium phosphate cement, 8 parts of chitosan, and 6 parts of montmorillonite.
[0044] The mass ratio of carboxymethyl cellulose and chitosan is: 2:1;
[0045] The mass ratio of modified coal gangue to magnesium phosphate cement is 1:0.4.
[0046] Preparation:
[0047] 1) Preparation of modified coal gangue: the coal gangue is roasted at 480° C. for 15 min, and then pulverized after cooling to obtain modified coal gangue with a particle size of 1-5 mm;
[0048] 2) mixing the obtained modified coal gangue with magnesium phosphate cement, adding water according to the ratio of material to liquid ratio of 1:0.06, and stirring to obtain a mixture;
[0049] 3) according to the mass ratio of carboxymethyl cellulose and water to be mixed in a ratio of 1:5, and heated at 55 ° C for 6 minutes to obtain a transparent solution;
[0050] 4) Mix the transparent solution, chitosan and montmorillo...
Embodiment 2
[0052]20 parts of modified coal gangue, 18 parts of carboxymethyl cellulose, 10 parts of magnesium phosphate cement, 10 parts of chitosan, and 5 parts of montmorillonite.
[0053] The mass ratio of carboxymethyl cellulose and chitosan is: 1.8:1;
[0054] The mass ratio of modified coal gangue to magnesium phosphate cement is 1:0.5.
[0055] Preparation:
[0056] 1) Preparation of modified coal gangue: the coal gangue is roasted at 500° C. for 10 minutes, and then pulverized after cooling to obtain modified coal gangue with a particle size of 1-5 mm;
[0057] 2) mixing the obtained modified coal gangue with magnesium phosphate cement, adding water according to the ratio of material to liquid ratio of 1:0.08, and stirring to obtain a mixture;
[0058] 3) According to the ratio of carboxymethyl cellulose to water mass ratio of 1:5, heating at 50°C for 8min to obtain a transparent solution;
[0059] 4) Mix the transparent solution, chitosan and montmorillonite, stir, cool and d...
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