Composite hydrogel loaded with vascular disrupting agent and near-infrared optothermal response nanometer particles as well as preparation and applications of composite hydrogel
A technology of composite hydrogel and vascular blocking agent, which is applied in the fields of oncology and pharmacy, can solve the problems of easy drug resistance and large side effects of chemotherapy, etc., and achieve enhanced tumor permeability, long-acting drug delivery, and enhanced flow sexual effect
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Embodiment 1
[0050] Preparation of Prussian Blue Nanoparticles by Reductive Dispersion Method of Polyvinylpyrrolidone (PVP)
[0051] Take by weighing 15g polyvinylpyrrolidone (PVP) and 664mg red blood salt (K 3 [Fe(CN) 6 ]), add 200mL 0.01M HCl, stir at room temperature for 30min, transfer to 80℃ constant temperature oil bath to react for 20h, cool to room temperature after the reaction, centrifuge at high speed for 20min, remove the supernatant, wash with secondary water until neutral, freeze-dry spare.
Embodiment 2
[0052] Embodiment 2. Sodium citrate modified precipitation method prepares Prussian blue nanoparticles
[0053] Weigh 0.10g sodium citrate and add 20mL FeCl 3 (1mM) solution, weigh 0.10g sodium citrate and add 20mLK 4 [Fe(CN) 6 ] (1mM) aqueous solution, under constant temperature stirring at 60°C, sodium citrate / K 4 [Fe(CN) 6 ] The mixed solution was added dropwise into the sodium citrate / FeCl3 mixed solution, and after it was cooled to room temperature, the stirring was continued for 30 min to obtain Prussian blue nanoparticles.
Embodiment 3
[0054] Example 3. Preparation of Mesoporous Prussian Blue Nanoparticles
[0055] Weigh 0.08g of Prussian blue (Prussian blue, PB) nanoparticles and 125mg of PVP, add them to 80mL of 1.0M HCl, stir for 30min, transfer to a 100mL reaction kettle, place in a 140°C oven for 4h, centrifuge at high speed for 20min, collect The precipitate was washed with secondary water until neutral, and freeze-dried for later use.
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