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lion0528

金虫 (小有名气)

[求助] APTMS修饰SiO2

利用APTMS修饰二氧化硅,我一般是直接将APTMS加入到已经反应了12h的SiO2溶液中,然后继续反应两个小时,再回馏1h.
请问是不是应该把制备的SiO2先离心处理一下,再分散在无水乙醇中,然后再加入APTMS呢?
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hijackhit

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【答案】应助回帖

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感谢参与,应助指数 +1
lion0528: 金币+10, ★有帮助, 好的,我试试,谢谢~~ 2013-09-07 21:17:26
最好是这样,做好的氧化硅溶液,除了你看到的可见颗粒外,应该存在大量的分散系胶体、残余中间体和少量原料,这些物质会增加副反应和竞争反应的可能性。
2楼2013-09-06 11:34:27
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