Seawater desalination material based on polyurethane foams and preparation method thereof
A technology of polyurethane foam and polyurethane sponge, which is applied in seawater treatment, general water supply saving, heating water/sewage treatment, etc., can solve the problem of low evaporation efficiency, achieve simple operation, reduce cost, and improve heat absorption performance
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[0028] A preparation method of a seawater desalination material based on polyurethane foam, comprising the following steps:
[0029] 1) Preparation of polyurethane sponge grafted with reduced graphene oxide;
[0030] 1-1) Add graphene oxide into a three-necked flask, then add deionized water, and ultrasonically disperse to obtain solution A;
[0031] 1-2) Put the polyurethane sponge in absolute ethanol for ultrasonic treatment, then place it in deionized water for ultrasonic treatment after drying, and then dry it; add the pretreated polyurethane sponge to solution A, at 30-32 ℃ Stir in a constant temperature water bath for 30-40min to coagulate;
[0032] 1-3) The constant temperature water bath was heated to 95-105°C, and 20 μl of hydrazine hydrate was added per mg of graphene oxide for in-situ reduction for 1-1.2 hours;
[0033] 1-4) Take out the polyurethane sponge and dry it at 50-55°C for 24-30 minutes to obtain a polyurethane sponge grafted with reduced graphene oxide;...
Example Embodiment
[0040] Example 1
[0041] A preparation method of a seawater desalination material based on polyurethane foam, comprising the following steps:
[0042] Step 1. Add 0.1 g of graphene oxide into a 250 mL three-necked flask, add 80 mL of deionized water, and ultrasonically disperse the mixed solution for 10 min to obtain solution A;
[0043] The polyurethane sponge is placed in anhydrous ethanol for ultrasonic treatment, after drying, it is placed in deionized water for ultrasonic treatment, and then dried;
[0044] Add three dried sponges (about 0.5 g) to solution A, and stir for 30 min in a constant temperature water bath at 30°C for coagulation;
[0045] The thermostatic water bath was heated to 100 °C, and 20 μl of hydrazine hydrate was added to each mg of graphene oxide for in-situ reduction for 1 h;
[0046] The polyurethane sponge was taken out and dried in a low-temperature drying oven at 50°C for 24 hours to obtain a polyurethane sponge grafted with reduced graphene ox...
Example Embodiment
[0051] Example 2
[0052] A preparation method of a seawater desalination material based on polyurethane foam, comprising the following steps:
[0053] Step 1. Add 0.1 g of graphene oxide into a 250 mL three-necked flask, add 80 mL of deionized water, and ultrasonically disperse the mixed solution for 10 min to obtain solution A;
[0054] The polyurethane sponge is placed in anhydrous ethanol for ultrasonic treatment, after drying, it is placed in deionized water for ultrasonic treatment, and then dried;
[0055] Add three dried sponges (about 0.5 g) to solution A, and stir for 30 min in a constant temperature water bath at 30°C for coagulation;
[0056] The thermostatic water bath was heated to 100 °C, and 20 μl of hydrazine hydrate was added to each mg of graphene oxide for in-situ reduction for 1 h;
[0057] Take out the sponge and put it into a low-temperature drying oven at 50°C for 24 hours to dry to obtain a polyurethane sponge grafted with reduced graphene oxide;
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