Preparation method and application of a straw full-component hydrogel
A hydrogel, full-component technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problems of unreasonable utilization of wheat straw and environmental pollution, and achieve significant economic and environmental benefits. , The effect of easy availability of raw materials and good desorption ability
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Embodiment 1
[0040] (1) Preparation of straw full-component aqueous solution
[0041] Wheat straw is pulverized, and 40-mesh powder is taken by sieve; 40g of wheat straw powder is weighed in a 1000 ml Erlenmeyer flask (with condensing device), and then 30ml of hydrogen peroxide (30%, wt%) and 20g of sodium hydroxide are added , the temperature was controlled at 55 ° C, and reacted for 24h under water bath conditions. The prepared solution was ultrasonicated with an ultrasonic cell pulverizer at a power of 650 W for 25 min, and the pH was adjusted to 8 to obtain an aqueous solution of all straw components.
[0042] Measure 10 mL of an aqueous solution of all straw components, and make it fully stirred in a water bath at 55 °C, add 0.02 g of ammonium persulfate and 0.02 g of anhydrous sodium sulfite and stir rapidly for 5 min, then add 1.3 ml of acrylic acid and 0.02 g of N,N-methylenebisacrylamide, and stir well to make it evenly mixed. After the reaction system gradually becomes viscous ...
Embodiment 2
[0047] (1) Preparation of straw full-component aqueous solution
[0048] Crush the wheat straw and sieve the 40-mesh powder; weigh 50g of the wheat straw powder in a 1000ml Erlenmeyer flask (with a condensing device), then add 30ml of hydrogen peroxide (30%, wt%) and 15g of sodium hydroxide , the temperature was controlled at 65 °C, and the reaction was carried out in a water bath for 24 h. The prepared solution was ultrasonicated for 30 min with an ultrasonic cell pulverizer at a power of 650 W, and the pH was adjusted to 8 to obtain an aqueous solution of all straw components.
[0049] Measure 15 mL of an aqueous solution of all components of straw, and make it fully stirred in a water bath at 60 °C, add 0.03 g of ammonium persulfate and 0.03 g of anhydrous sodium sulfite and stir rapidly for 5 min, then add 2 ml of acrylic acid and 0.025 g of N,N-methylenebisacrylamide, and stir well to make it evenly mixed. After the reaction system gradually becomes viscous until it can...
Embodiment 3
[0081] (1) Preparation of straw full-component aqueous solution
[0082] Wheat straw is pulverized, and 40-mesh powder is sieved; 60g of wheat straw powder is weighed in a 1000ml Erlenmeyer flask (with condensing device), and then 25ml of hydrogen peroxide (30%, wt%) and 25g of sodium hydroxide are added , the temperature was controlled at 50 °C, and the reaction was carried out in a water bath for 30 h. The prepared solution was ultrasonicated for 35 min with an ultrasonic cell pulverizer at a power of 650 W, and the pH was adjusted to 8 to obtain an aqueous solution of all straw components.
[0083] Measure 20mL of an aqueous solution of all components of straw, and make it fully stirred in a water bath at 65 °C, add 0.04 g of ammonium persulfate and 0.04 g of anhydrous sodium sulfite and stir rapidly for 5 min, then add 2.6 ml of acrylic acid and 0.04 g of N,N-methylenebisacrylamide, and stir well to make it evenly mixed. After the reaction system gradually becomes viscou...
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