High-efficiency and antibacterial polymeric micelle with high pH sensibility and biocompatibility and preparation method thereof
A technology of biocompatibility and polymer glue, which is applied in the direction of medical preparations with non-active ingredients, medical preparations containing active ingredients, antibacterial drugs, etc., which can solve the problem of inapplicable biomedical fields and poor antibacterial effect of polymers , poor antibacterial and antibacterial effects, etc., to achieve good bactericidal effects, improve antibacterial and bactericidal effects, and have a wide range of applications
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Embodiment 1
[0034] (1) Macromolecular initiator PEO 43 -Synthesis of Br
[0035] 10g flake PEO and 250mL toluene were azeotropically distilled to remove excess water, the temperature of the system was lowered to room temperature, and replaced with an ice-water bath, 2mL triethylamine, 1.9mL 2-bromoisobutyryl bromide in 20mL toluene solution were added, The reaction was carried out for 40h, filtered, extracted, and the organic phase was collected, dried, filtered, precipitated, suction filtered, and vacuum-dried to obtain a white powdery macromolecular initiator PEO 43 -Br.
[0036] (2) ATRP synthetic polymer
[0037] 1g macroinitiator PEO 43-Br, 0.033 g catalyst cuprous bromide (CuBr), 0.078 g ligand bpy, 0.5 g monomer diethylaminoethyl methacrylate (DEA), 2 mL methanol solvent into a 50 mL round bottom flask, anhydrous Atom Transfer Radical Polymerization (ATRP) is carried out under the protective conditions of nitrogen or argon without oxygen at a temperature of 60 o C, for 24h. T...
Embodiment 2
[0046] (1) Macromolecular initiator PEO 43 -Synthesis of Br
[0047] 10g flake PEO and 250mL toluene were azeotropically distilled to remove excess water, the temperature of the system was lowered to room temperature, and replaced with an ice-water bath, 2mL triethylamine, 1.9mL 2-bromoisobutyryl bromide in 20mL toluene solution were added, The reaction was carried out for 40h, filtered, extracted, and the organic phase was collected, dried, filtered, precipitated, suction filtered, and vacuum-dried to obtain a white powdery macromolecular initiator PEO 43 -Br.
[0048] (2) ATRP synthetic polymer
[0049] 1g macroinitiator PEO 43 -Br, 0.033 g catalyst cuprous bromide (CuBr), 0.078 g ligand bpy, 0.8 g monomer diethylaminoethyl methacrylate (DEA), 2 mL methanol solvent into a 50 mL round bottom flask, anhydrous Atom Transfer Radical Polymerization (ATRP) is carried out under the protective conditions of nitrogen or argon without oxygen at a temperature of 60 o C, for 30h. ...
Embodiment 3
[0055] (1) Macromolecular initiator PEO 43 -Synthesis of Br
[0056] 10g flake PEO and 250mL toluene were azeotropically distilled to remove excess water, the temperature of the system was lowered to room temperature, and replaced with an ice-water bath, 2mL triethylamine, 1.9mL 2-bromoisobutyryl bromide in 20mL toluene solution were added, The reaction was carried out for 40h, filtered, extracted, and the organic phase was collected, dried, filtered, precipitated, suction filtered, and vacuum-dried to obtain a white powdery macromolecular initiator PEO 43 -Br.
[0057] (2) ATRP synthetic polymer
[0058] 1g macroinitiator PEO 43 -Br, 0.033 g catalyst cuprous bromide (CuBr), 0.078 g ligand bpy, 0.5 g monomer diethylaminoethyl methacrylate (DEA), 2 mL methanol solvent into a 50 mL round bottom flask, anhydrous Atom Transfer Radical Polymerization (ATRP) is carried out under the protective conditions of nitrogen or argon without oxygen at a temperature of 60 o C, for 24h. ...
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