Method for preparing nano-silver antibacterial agent by utilizing microcapsule embedding technology

Abstract

The invention discloses a method for preparing a nano-silver antibacterial agent by utilizing a microcapsule embedding technology and application thereof. In the preparation method, an oily nano-silver material is used as the core material of the nano-silver microcapsule particle, and the beta-cyclodextrin is used as a wall material; and in the reaction process, the nano-silver microcapsules of a core-shell structure, an inlaid structure, a shell-core structure, a shell-core-shell structure and other structures are prepared by a conjugate ultrasonic method. A supercritical drying method is adopted in the drying process, the shrinkage and collapse of the microcapsule in the drying process are avoided, the problem of agglomeration during the nano-powder drying process is improved, and the performance of sustained release, lasting and color change resistance of the nano-silver microcapsule is improved. The prepared nano-silver particle can be independently used as an antibacterial liquid, or be compounded with a high molecular material to prepare various antibacterial materials such as antibacterial plastic, an antibacterial PVA (Polyvinyle Acetate) film and antibacterial rubber, or be compounded with natural or chemosynthetic textile fabrics to prepare antibacterial fabric, or be compounded with ceramics to prepare various antibacterial ceramics. The method disclosed by the invention is simple; and the prepared nano-silver has the characteristics of small particle size, good dispersity, sustained-release bacteriostasis, wide application and the like.

Description

technical field [0001] The invention relates to a method for preparing nano-silver microcapsules, belonging to the field of nano-materials and technologies. Background technique In recent years, with the improvement of people's living standards, higher requirements have been put forward for the quality of life. People are very concerned about the antibacterial protection of clothing, food, housing, transportation and other aspects that are closely related to the quality of life. At present, the inorganic antibacterial agents commonly used in daily necessities mainly utilize the antibacterial ability of metals such as silver, copper, zinc and titanium, but metal ions often have various deficiencies and are difficult to apply and promote. Silver ions and nano-silver particles, as inorganic antibacterial agents, have good antibacterial effects on fungi, bacteria, and molds. They have the advantages of broad spectrum, long-term effect, and safety. It can achieve very good a...

AI Technical Summary

Problems solved by technology

However, the prepared nano-silver has active chemical properties, single function, and is easy to oxidize, which affects its antibacterial performance.