A kind of preparation method and application of degradable hyperbranched polyamidoamine
A technology of polyamidoamine and dimethylformamide, which is applied in the field of preparation of degradable hyperbranched polyamidoamine, can solve problems such as the inability to realize full release of genes and drugs, achieve good stability and biocompatibility, reduce Effect of interaction and easy purification
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Embodiment 1
[0024] 3.0 mmol of disulfide bond-containing bifunctional monomer N,N′-bis(acryloyl)cystamine (BAC) and 3.0 mmol of trifunctional monomer 1-(2-aminoethyl)piperazine (AEPZ) were dissolved in methanol Mix in medium temperature, carry out Michael addition polymerization at 50°C under magnetic stirring, add 3mmol of AEPZ after 5 days and react for 1 day to convert all the double bonds at the end of the polymer into amino groups, and the obtained products are precipitated by ether and acetone. The product was purified, and the precipitated product was vacuum-dried at room temperature to obtain a white powder degradable hyperbranched polyamidoamine. Raman, potential test and nuclear magnetic test are carried out to the product obtained, the result is as follows figure 2 with image 3 shown. Among them, such as figure 2 As shown, 507cm -1 is the absorption peak of the disulfide bond, indicating that the disulfide bond can be successfully introduced into the polymer hyperbranched ...
Embodiment 2
[0028] 3.0 mmol of disulfide bond-containing bifunctional monomer N,N′-bis(acryloyl)cystamine (BAC) and 1.50 mmol of trifunctional monomer 1-(2-aminoethyl)piperazine (AEPZ) were dissolved in methanol Mix in medium temperature, carry out Michael addition polymerization at 50°C under magnetic stirring, add 3 mmol of AEPZ after 5 days and react for 2 days to convert all the double bonds at the end of the polymer into amino groups, and the obtained products are successively precipitated by ether and acetone. The product was purified, and the precipitated product was vacuum-dried at room temperature to obtain a white powdery reductively degradable hyperbranched polyamidoamine.
Embodiment 3
[0030] Mix 2.0 mmol of disulfide bond-containing bifunctional monomer N,N′-bis(acryloyl)cystamine (BAC) and 3.0 mmol of trifunctional monomer diethylenetriamine (DETA) in methanol, 50°C, magnetic Carry out Michael addition polymerization under stirring, add 1 mmol of DETA after 5 days and react for 3 days to convert all the double bonds at the end of the polymer into amino groups. The obtained product is purified by ether precipitation, acetone precipitation and other methods successively. Vacuum drying at room temperature gave white powdery reductively degradable hyperbranched polyamidoamine.
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