Drying method of magnetic microspheres
By adding solvents and nonionic surfactants to the magnetic microspheres, a volatile ice crystal skeleton is formed, and vacuum drying technology is used to solve the problems of magnetic microspheres being easily aggregated, low temperature and damage and not easily redissolved in the existing liquid storage methods, achieving stable drying and rapid redissolution effects.
CN119713768AActive Publication Date: 2025-03-28CHANGSHA KAIPU INSTR CO LTD
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Patent Information
- Application Number
- CN202510014204.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-06
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2045-01-06
AI Technical Summary
Technical Problem
Magnetic microspheres have problems such as easy aggregation, low temperature and easy damage and difficult redissolvation in existing liquid storage methods, resulting in short storage cycle and inconvenient transportation.
Method used
Using vacuum drying technology, by adding solvent and nonionic surfactant to the magnetic microspheres, a volatile ice crystal skeleton is formed to avoid aggregation, and two stages of drying are performed under vacuum conditions.
Benefits of technology
The stable drying of magnetic microspheres is achieved, which avoids aggregation and structural damage, and is quickly redissolved in pure water, which is suitable for storage and transportation, and retains the bearing capacity of magnetic microspheres.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of magnetic microspheres, in particular to a drying method of magnetic microspheres. The drying method of the magnetic microspheres comprises the following steps: S1, adding a solvent and a surfactant into the magnetic microspheres, and uniformly mixing to obtain a mixed solution; s2, pre-freezing the mixed solution for 2-10 hours at the temperature of 0-18 DEG C; s3, performing two-stage vacuum drying on the pre-frozen mixed solution; the temperature of the first-stage vacuum drying is 0-18 DEG C, and the vacuum degree is 100-300 mbr; the temperature of the second-stage vacuum drying is 0-18 DEG C, and the vacuum degree is 0.1-10 mbr; the solvent is dimethyl sulfoxide; the surface active agent is a nonionic surface active agent. According to the invention, the non-surfactant and the solvent are added to play a role in dispersing and skeleton supporting, and a volatile ice crystal skeleton is provided among the magnetic microspheres, so that the magnetic beads are not easy to gather in the freeze drying process, and the damage of the magnetic beads is avoided.
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