Esterification Modification of Hydroxyl Nanomaterials

The patent applies preliminary action by performing surface modification of nanoparticles during the synthesis process itself, rather than as a separate post-treatment step. The esterification reaction is conducted in-situ as the nanoparticles are being formed, ensuring that the surface modification and dispersion stabilization occur before the nanoparticles are subjected to storage or further processing. This preliminary modification prevents subsequent agglomeration during storage and transportation.

The patent employs parameter changes by modifying the surface chemical properties of nanoparticles through esterification reaction. By changing the surface chemistry parameters (introducing ester groups through reaction with carboxylic acids or anhydrides), the nanoparticle surface energy and interfacial properties are altered, creating steric or electrostatic repulsion that prevents re-agglomeration during storage while maintaining the core nanoparticle structure.

The patent merges the synthesis process with the surface modification process by conducting the esterification reaction in-situ during nanoparticle formation. Instead of performing surface modification as a separate post-synthesis step requiring strict anhydrous and oxygen-free conditions, the modification occurs simultaneously with nanoparticle synthesis in the same reaction medium, eliminating the need for separate controlled atmosphere steps and simplifying the overall manufacturing process.

The patent applies self-service by utilizing the reaction system itself to provide both the nanoparticle synthesis and the surface modification functions. The same organic phase reaction system that forms the nanoparticles also provides the carboxylic acid or anhydride reagents for in-situ esterification, making the process self-contained and eliminating the need for separate controlled environment equipment or additional purification steps.

The patent applies preliminary action by performing the esterification reaction during the nanoparticle synthesis process itself, before the nanoparticles are isolated or subjected to storage. By conducting the surface modification in-situ while the reaction system is still active and the nanoparticles are forming, the precise control of organic segment length is achieved without subsequent exposure to conditions that would require strict water and oxygen exclusion during post-synthesis handling.

The patent maintains continuity of useful action by keeping the esterification reaction active throughout the nanoparticle synthesis process. The reaction conditions are maintained continuously from nanoparticle formation through surface modification, eliminating interruptions where water or oxygen contamination could occur. This continuous process ensures both precise control of modification length and avoidance of strict atmosphere requirements.