一种纳米二氧化硅溶胶及其制备方法

By combining hydrolysis with the use of hydroxypropyl-β-cyclodextrin and silane coupling agents, the problems of large particle size and uneven distribution of silica sol were solved, and nano-silica sol suitable for multiple fields was prepared.

CN120518085BActive Publication Date: 2026-07-17SHANDONG PEAK-TECH NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG PEAK-TECH NEW MATERIAL CO LTD
Filing Date
2025-06-26
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The silica sol prepared by existing technology has a large particle size and uneven particle size distribution, which limits its application.

Method used

Nano-sized silica sol was prepared by hydrolysis using hydroxypropyl-β-cyclodextrin and a silane coupling agent containing three alkoxy groups. The particle size was controlled and the particle size distribution was improved by forming hydrogen bonds and dispersing effects.

Benefits of technology

Nano-sized silica sol with small particle size and uniform particle size distribution was prepared, which is suitable for coatings, precision casting and electronics industries.

✦ Generated by Eureka AI based on patent content.

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Abstract

本发明属于纳米材料制备技术领域，涉及一种纳米二氧化硅溶胶及其制备方法。该方法包括以下步骤：(1)将硅源溶解于无水乙醇中，然后加入去离子水和羟丙基‑β‑环糊精，搅拌均匀后，逐滴加入酸溶液，搅拌反应一段时间；(2)向步骤(1)反应溶液中加入含三个烷氧基的硅烷偶联剂，搅拌反应即得纳米二氧化硅溶胶。羟丙基‑β‑环糊精在二氧化硅胶粒表面形成保护层，防止二氧化硅胶粒的过度长大。硅烷偶联剂水解后可与纳米二氧化硅表面羟基结合，提高体系的稳定性，改善了纳米二氧化硅粒子的团聚现象，制备出了粒径小、粒度分布均匀的纳米二氧化硅溶胶，工艺过程简单，适用于工业化生产。
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