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发明公开
CN106040162A 一种表面改性二氧化硅材料及其制备方法和应用 有权

一种表面改性二氧化硅材料及其制备方法和应用
摘要：
本发明公开了一种表面改性二氧化硅材料及其制备方法和应用，属于复合材料技术领域。本发明所述方法为将纳米二氧化硅放入乙醇中，然后加入3‑(2,3‑环氧丙氧)丙基三甲氧基硅烷，回流反应后得到GPTMS‑SiO2；然后将GPTMS‑SiO2放入乙醇中，加入聚乙烯亚胺，回流反应后得到PEI‑SiO2；然后将得到的PEI‑SiO2放入蒸馏水中，然后加入溴乙基磺酸钠和氢氧化钠，在70℃条件下回流反应，离心分离烘干后得到表面改性的纳米二氧化硅。本发明制备得到的纳米材料可以选择性吸附水溶液中的银离子，可广泛用于工业废水中银离子的回收处理。
摘要（英）：

The invention discloses a surface modified silicon dioxide material, a preparation method and application thereof and belongs to the technical field of a compound material. The method provided by the invention comprises the following steps of: adding nanometer silicon dioxide into ethyl alcohol, and then adding 3-(2,3-epoxy propoxy) propyl trimethoxy silane and performing backflow reaction, thereby acquiring GPTMS-SiO2; putting GPTMS-SiO2 into ethyl alcohol, adding polymine and performing backflow reaction, thereby acquiring PEI-SiO2; and putting the acquired PEI-SiO2 into distilled water, and then adding sodium 2-bromoethanesulphonate and sodium hydroxide, performing backflow reaction at 70 DEG C, centrifugally separating and drying, thereby acquiring the surface modified nanometer silicon dioxide. The nanometer material prepared according to the invention can selectively absorb silver ions in aqueous solution and can be widely applied to the recycling treatment of silver ions in industrial waste water.

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