A non-dehydrated sludge high-volume synthetic water-absorbing and water-retaining material and its preparation method
A water-retaining material with a high content of technology, applied in the field of preparation of new water-absorbing and water-retaining materials, can solve the problems of difficulty and high industrial cost, high energy consumption, and hindering the application of sludge, and achieve the effect of simplifying and saving costs
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[0032] like figure 1 As shown, the specific steps of the preparation method of the non-dehydrated sludge high-volume synthetic water-absorbing and water-retaining material of the present invention are as follows:
[0033] 1) Raw material selection
[0034] Non-dehydrated sludge (industrial product); N, N'-methylene bisacrylamide (analytical pure), acrylic acid (analytical pure), sodium hydroxide (analytical pure), starch (analytical pure), distilled water (analytical pure ), potassium persulfate (analytically pure).
[0035] 2) Preparation process
[0036] The first step is to neutralize 10-20 parts of acrylic acid monomer with 10-15 parts of sodium hydroxide in parts by mass under ice-water bath conditions, and control the degree of neutralization at 50%-85% to obtain a clear mixture;
[0037] The second step is to add 5-10 parts of starch additives to the mixed solution prepared in the first step in terms of parts by mass. After the starch is dissolved, add the mixed sol...
Embodiment 1
[0057] Under the condition of ice-water bath, neutralize 10g of acrylic acid monomer with 10g of sodium hydroxide, the neutralization degree is controlled at 70%, and a clear mixed solution is obtained; then weigh 5g of starch and add it to the above mixed solution, after the starch dissolves , then add the mixed solution into a three-necked flask equipped with a stirrer and a condenser, and heat it in a constant temperature water bath at 40°C; then dissolve 0.2g of potassium persulfate into an appropriate amount of water to dissolve, and then add an aqueous solution of potassium persulfate into the three-necked flask In the flask, react for 30 minutes until the viscosity of the solution increases significantly and the color is milky white; 40g of sludge is sterilized by microwave and dispersed in water, and the pH value of the water dispersion of non-dehydrated sludge is adjusted to 5.0, and then the non-dehydrated sludge The aqueous dispersion of state sludge was poured into ...
Embodiment 2
[0059] Under the condition of ice-water bath, use 15g of sodium hydroxide to neutralize 20g of acrylic acid monomer, the neutralization degree is controlled at 60%, and a clear mixed solution is obtained; then weigh 10g of starch and add it to the above mixed solution, after the starch dissolves , and then add the mixed solution into a three-necked flask equipped with a stirrer and a condenser, and heat it in a constant temperature water bath at 40°C; dissolve 0.6g of potassium persulfate into an appropriate amount of water for dissolving, and then add an aqueous solution of potassium persulfate into the three-necked flask In the flask, react for 30 minutes until the viscosity of the solution increases significantly and the color is milky white; 60g of sludge is sterilized by microwave and dispersed in water to adjust the pH value of the water dispersion of non-dehydrated sludge to 5.0, and then the non-dehydrated sludge The aqueous dispersion of state sludge was poured into a ...
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