A modified hydroxyethyl cellulose superabsorbent gel and its preparation method and application
A technology of hydroxyethyl cellulose and superabsorbent, applied in the field of functional polymers, can solve problems such as limiting the application of cellulose, achieve good soil degradability, rich resources, and improve soil effects
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Embodiment 1
[0038] A modified hydroxyethyl cellulose superabsorbent gel, prepared by the following method:
[0039] (1) Dissolve 0.3g of succinochitosan in 20mL of 30g·L -1 NaOH aqueous solution;
[0040] (2) Under rapid stirring, gradually add 0.7 g of hydroxyethyl cellulose to the above solution to fully dissolve it;
[0041] (3) under rapid stirring, add 0.59 g of crosslinking agent epichlorohydrin to the composite solution, and stir until the epichlorohydrin is evenly dispersed;
[0042] (4) After heating up to 60°C and insulated for 4 hours, a hydrogel is obtained;
[0043] (5) After the hydrogel was cut into pieces, it was alternately washed three times with deionized water and ethanol, and freeze-dried to obtain the modified hydroxyethyl cellulose superabsorbent hydrogel.
[0044] The water absorption performance of the superabsorbent gel is tested by weighing method, and the water absorption is calculated according to formula (1):
[0045]
[0046] W is the mass (g) of the ...
Embodiment 2
[0050] A modified hydroxyethyl cellulose superabsorbent gel, prepared by the following method:
[0051] (1) Dissolve 0.2g succinochitosan in 20mL 30g·L -1 NaOH aqueous solution;
[0052] (2) Under rapid stirring, gradually add 0.8 g of hydroxyethyl cellulose to the above solution to fully dissolve it;
[0053] (3) under rapid stirring, add 0.59 g of crosslinking agent epichlorohydrin to the composite solution, and stir until the epichlorohydrin is evenly dispersed;
[0054] (4) After heating up to 60°C and insulated for 4 hours, a hydrogel is obtained;
[0055] (5) Cut the hydrogel into pieces, wash with deionized water and ethanol three times alternately, and dry at 40° C. to obtain the modified hydroxyethyl cellulose superabsorbent hydrogel.
[0056] The water absorption rate and saline absorption rate of the hydroxyethyl cellulose superabsorbent gel prepared in this example reached 601 g / g and 103 g / g, respectively.
[0057] The soil water holding capacity, water holdin...
Embodiment 3
[0068] A modified hydroxyethyl cellulose superabsorbent gel, prepared by the following method:
[0069] (1) Dissolve 0.2g succinochitosan in 20mL 30g·L -1 NaOH aqueous solution;
[0070] (2) Under rapid stirring, gradually add 0.8 g of hydroxyethyl cellulose to the above solution to fully dissolve it;
[0071] (3) under rapid stirring, add 0.71 g of crosslinking agent epichlorohydrin to the composite solution, and stir until the epichlorohydrin is evenly dispersed;
[0072] (4) After heating up to 60°C and insulated for 4 hours, a hydrogel is obtained;
[0073] (5) Cut the hydrogel into pieces, wash with deionized water and ethanol three times alternately, and dry at 40° C. to obtain the modified hydroxyethyl cellulose superabsorbent hydrogel.
[0074] The water absorption rate of the modified hydroxyethyl cellulose superabsorbent gel prepared in this example reached 429 g / g, and the salt water absorption rate reached 41 g / g.
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