Nano magnetic fluid composite material coated with polyamino acid and preparation method thereof
A polyamino acid and nano-magnetic fluid technology is applied in the field of magnetic fluid to achieve the effects of good crystallinity, strong hydrophilicity and low synthesis cost
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Embodiment 1
[0031] a. take 0.2g molecular weight and be the solid powder polysuccinimide of 6000 in the Teflon reactor;
[0032] b. Dissolve 0.25g of NaOH solid powder in 25ml of deionized water, pour it into the Teflon reactor in step a after the NaOH is completely dissolved, stir and mix to dissolve completely;
[0033] c. 0.14g FeCl 3 ·6H 2 O (0.5mmol) and 0.39g Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 Add O (1mmol) into 10ml of deionized water, stir to dissolve, mix with the solution obtained in step b, and continue stirring for 5-15 minutes; seal the Teflon reactor with a stainless steel sleeve, and react at 140°C for 2 hours;
[0034] d. Discard the supernatant after cooling, collect the lower solid by magnetic separation, dissolve it in water, add ethanol to precipitate and centrifuge and wash 2-5 times, and finally disperse the product stably in 5-10ml deionized water, that is, polyamino acid coated Ferroferromagnetic nanoparticle composite material.
Embodiment 2
[0036] a. take 0.2g molecular weight and be the solid powder polysuccinimide of 6000 in the Teflon reactor;
[0037] b. Dissolve 0.25g of NaOH solid powder in 25ml of deionized water, pour it into the Teflon reactor in step a after the NaOH is completely dissolved, stir and mix to dissolve completely;
[0038] c. 0.14g FeCl 3 ·6H 2 O (0.5mmol) and 0.39g Fe(NH 4 ) 2 (SO4) 2 ·6H 2 Add O (1mmol) into 10ml of deionized water, stir to dissolve, mix with the solution obtained in step b, and continue to stir for 5-15 minutes; seal the Teflon reactor with a stainless steel sleeve, and react at 150°C for 2 hours;
[0039] d. Discard the supernatant after cooling, collect the lower solid by magnetic separation, dissolve it in water, add ethanol to precipitate and centrifuge and wash 2-5 times, and finally disperse the product stably in 5-10ml deionized water, that is, polyamino acid coated Ferroferromagnetic nanoparticle composite material.
Embodiment 3
[0041] a. take 0.2g molecular weight and be the solid powder polysuccinimide of 6000 in the Teflon reactor;
[0042] b. Dissolve 0.25g of NaOH solid powder in 25ml of deionized water, pour it into the Teflon reactor in step a after the NaOH is completely dissolved, stir and mix to dissolve completely;
[0043] c. 0.14g FeCl 3 ·6H 2 O (0.5mmol) and 0.39g Fe(NH 4 ) 2 (SO 4 ) 2 ·6H 2 Add O (1mmol) into 10ml of deionized water, stir to dissolve, mix with the solution obtained in step b, and continue to stir for 5-15 minutes; seal the Teflon reactor with a stainless steel sleeve, and react at 160°C for 2 hours;
[0044] d. Discard the supernatant after cooling, collect the lower solid by magnetic separation, dissolve it in water, add ethanol to precipitate and centrifuge and wash 2-5 times, and finally disperse the product stably in 5-10ml deionized water, that is, polyamino acid coated Ferroferromagnetic nanoparticle composite material.
[0045] The state (left) and the s...
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