Method for preparing shell-loaded nano-silver composite antibacterial material with assistance of microwaves
A composite antibacterial and microwave-assisted technology, which is applied in the field of microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, can solve the problems of long reaction time, large synthetic particles and easy agglomeration, and achieve excellent antibacterial activity.
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[0018] The invention provides a preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial material, which is specifically implemented according to the following steps:
[0019] Step 1. Pretreatment of shell powder, 200-400 mesh shell powder in 0.1-0.6mol / L sodium hydroxide, sodium carbonate or potassium hydroxide alkaline solution, 15-40KHz ultrasonic treatment for 10-50min, washing with water and drying at 80-120°C to obtain pretreated shell powder;
[0020] Step 2. Add the pretreated shell powder to 0.05-0.2mol / L silver nitrate solution, and add 0-5% of the weight of the shell powder to prepare a mixed solution. The additives are polyvinylpyrrolidone, glycerin, and ethylene glycol , sodium citrate, sodium borohydride, polyacrylamide, starch, sodium carboxymethylcellulose, β-cyclodextrin, polyphthalate and polypropyleneimine, mixed solution React in a microwave synthesis instrument at 50-100°C for 50-60min, wash with deionized wa...
Embodiment 1
[0028] A preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, specifically implemented according to the following steps: 200% of shell powder is treated in 0.1mol / L sodium hydroxide alkaline solution for 10min under the action of 15KHz ultrasound, washed with water and Dry at 120°C to obtain pretreated shell powder; add the pretreated shell powder to a 0.05mol / L silver nitrate solution, and add an additive accounting for 5% of the shell powder weight to prepare a mixed solution. The additive is β-cyclodextrin, The mixed solution was reacted in a microwave synthesis instrument at 100°C for 60 minutes. After the reaction was completed, it was washed three times with deionized water, filtered and dried at 65°C for 10 hours to obtain a shell-loaded nano-silver composite antibacterial material.
Embodiment 2
[0030] A preparation method for microwave-assisted synthesis of shell-loaded nano-silver composite antibacterial materials, specifically implemented according to the following steps: 400-mesh shell powder is treated in 0.6mol / L sodium carbonate alkaline solution for 50 minutes under the action of 40KHz ultrasound, washed with water and dried for 80 minutes. ℃ drying to obtain the pre-treated shell powder; add the pre-treated shell powder to 0.2mol / L silver nitrate solution, react in a microwave synthesis instrument at 50°C for 50min, wash with deionized water three times after the reaction is completed, and pump Filter and dry at 55°C for 15 hours to obtain the shell-loaded nano-silver composite antibacterial material.
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