A kind of phenyl-containing hydrophobic cross-linking monomer and hydrogel based on the monomer
A technology of cross-linking monomers and hydrogels, which is applied in the field of functional polymers and can solve problems such as plugging failure and inability to solidify
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Embodiment 1
[0043] Preparation of phenyl-containing hydrophobic crosslinking monomer
[0044] Add 500 mL of acetone and 22.83 g of bisphenol A into a dry three-necked flask with stirrer, condenser and dropping funnel, and add 42.26 g of 3-isopropenyl-dimethylbenzyl isocyanate to the dropping funnel. Stir until the bisphenol A in the flask is fully dissolved, then heat to 65°C in a water bath, and vacuum for 2 hours while heating to remove water. Add 0.0338g of dibutyl tin dilaurate under nitrogen protection. The 3-isopropenyl-dimethylbenzyl isocyanate in the dropping funnel was dropped into a three-necked flask, and the reaction was continued for 6 hours under stirring, and then distilled under reduced pressure to remove acetone to obtain the crude product of the target molecule. The crude product was rinsed with chloroform three times to remove unreacted monomers, and placed in an oven at 78° C. to a constant weight to obtain the target product.
Embodiment 2
[0046] Preparation of hydrogel
[0047] Add 690g of 1,4-dioxane, 11.31g of N-isopropylacrylamide, 18.81g of sodium acrylate and 6.31g of the monomer prepared in Example 1 into the reactor in sequence, stir until the monomer is completely dissolved, Add nitrogen for 40 minutes to purge the air. 0.73 g of dibenzoyl peroxide was added, the temperature was raised to a predetermined reaction temperature of 86°C, and the reaction was stirred for 12 hours in a nitrogen atmosphere to obtain a light yellow gelatinous crude product.
[0048] The crude product was added to 1000 mL of ethanol for precipitation and then filtered to obtain a solid phase product. Wash with acetone three times, and then use a 3:2 volume ratio of glacial acetic acid-ethylene glycol mixed solvent as the extractant to extract the product with a Soxhlet extractor for 24 hours, and vacuum dry to constant weight at 25°C. Get the target product.
Embodiment 3
[0050] Preparation of hydrogel
[0051] Into the reactor were sequentially added 812g of N,N-dimethylformamide, 12.72g of N,N-diethylacrylamide, 64.84g of sodium methacrylate and 12.61g of the monomer prepared in Example 1, and stirred to The body was completely dissolved, and argon gas was introduced for 60 minutes to vent the air. Add 3.60 g of lauryl peroxide, raise the temperature to a predetermined reaction temperature of 70° C., stir and react in an argon atmosphere for 8 hours to obtain a light yellow gelatinous crude product.
[0052] The crude product was added to 1000 mL of ethanol for precipitation and then filtered to obtain a solid phase product. Wash with acetone three times, and then use a 3:2 volume ratio of glacial acetic acid-ethylene glycol mixed solvent as the extractant to extract the product with a Soxhlet extractor for 24 hours, and vacuum dry to constant weight at 25°C. Get the target product.
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