p******s
发帖数: 193 | 1 想照着2009年邓春晖Angew chemie的Fe3O4@SiO2@PMMA 的文章，做这个东西，用来接功
能蛋白
大家看看，最后的聚合不需要引发剂么？
前文不赘述了，Fe3O4@SiO2-MPS 已经合成好了
要往上面修饰PMMA了，
The sandwich structured Fe3O4@SiO2@PMMA microspheres were synthesized via an
aqueous-phase radical polymerization. Typically, in a three-necked round
bottom flask (100 mL) equipped with a mechanical stirrer, a refluxing
condenser, and a nitrogen inlet, 10 mL of ethanol dispersion of Fe3O4@SiO2-
MPS microspheres were mixed
with 50 mL of aqueous solution containing 5.0 mg of sodium lauryl
benzenesulfate under mechanically stirring. After stirring for 1h, 1.0 g of
MMA monomers were added, and the resultant dispersion was bubbled with high-
purity nitrogen gas for 0.5 h. Then, the flask was immerged into a preheated
oil bath at 70oC and the polymerization was carried out with a stirring
speed of 200 rpm at 70°C for 24 h. The resulting Fe3O4@SiO2@PMMA
microspheres were harvested and washed by magnetic separation.
主要问题：
（1）通了半个小时氮气，往70度水里面一放，就开始聚合了？什么来引发呢？难道是
热引发？？
（2）另外半个小时通氮气吹走氧气这个好理解，但之后的24h聚合要不要继续鼓气呢？
没有说，按常识应该怎么做？把回流冷凝盖上，改成封闭反应？会不会有聚合放热的问
题。还是说继续鼓泡，水不会蒸干了吧，虽说有回流冷凝在。
其实现在sio2上接pmma的报道挺多的
但我重点是在通过羧基交联蛋白之后的事情，所以不想在这边纠结过久，只要有一种行
之有效的方法做出来就行了
请专业人士多多指教 | c**m
发帖数: 757 | 2 1。热引发，但是单体要纯化除阻聚剂
2。 24h聚合要不要继续鼓气 气流控制小一点。
an
【在 p******s 的大作中提到】
: 想照着2009年邓春晖Angew chemie的Fe3O4@SiO2@PMMA 的文章，做这个东西，用来接功
: 能蛋白
: 大家看看，最后的聚合不需要引发剂么？
: 前文不赘述了，Fe3O4@SiO2-MPS 已经合成好了
: 要往上面修饰PMMA了，
: The sandwich structured Fe3O4@SiO2@PMMA microspheres were synthesized via an
: aqueous-phase radical polymerization. Typically, in a three-necked round
: bottom flask (100 mL) equipped with a mechanical stirrer, a refluxing
: condenser, and a nitrogen inlet, 10 mL of ethanol dispersion of Fe3O4@SiO2-
: MPS microspheres were mixed
| p******s
发帖数: 193 | 3 非常感谢
an
【在 p******s 的大作中提到】
: 想照着2009年邓春晖Angew chemie的Fe3O4@SiO2@PMMA 的文章，做这个东西，用来接功
: 能蛋白
: 大家看看，最后的聚合不需要引发剂么？
: 前文不赘述了，Fe3O4@SiO2-MPS 已经合成好了
: 要往上面修饰PMMA了，
: The sandwich structured Fe3O4@SiO2@PMMA microspheres were synthesized via an
: aqueous-phase radical polymerization. Typically, in a three-necked round
: bottom flask (100 mL) equipped with a mechanical stirrer, a refluxing
: condenser, and a nitrogen inlet, 10 mL of ethanol dispersion of Fe3O4@SiO2-
: MPS microspheres were mixed
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