Typically, 12 mL
MNCs water dispersion, 80 mL ethanol, and 4 mL ammonium hydroxide were
mixed together in a three-neck ask. For each 20 min, 0.4 mL
TEOS was slowly injected in. The thickness of silica shell can be
determined by the times of the injection of TEOS. For Fe3-
O4@SiO2 described in the main text, TEOS was injected three
times. The coating process was conducted under vigorous
mechanical stirring and 50℃ water bath ,
With vigorously stirring, 400μL of APTES and
600 L of ammonia were added to 50 mL of Fe3O4@SiO2
MNPs solution suspended in 95% ethanol/water solution.
To enhance covalent bonding of the amine groups to
the silica nanoparticle surface, the mixture was reacted
for 4 h. The black precipitates were washed 3 times
with ethanol and the obtained APTES-functionalized
Fe3O4@SiO2 MNPs were re-dispersed in ethanol.
这是我在一篇二氧化硅改性文献里看到的步骤,然后查阅其他文献ph调成3可能是为了促进硅烷偶联剂与二氧化硅的吸附,减少硅烷偶联剂的聚合。
我做的是二氧化硅改性后接枝药物
那偶联剂的量您用多少呢?
我们实验室这边用的是磁力搅拌仪,不显示功率,搅拌功率90w,是属于剧烈的搅拌吗?
也没有滴加装置,请问滴加速率对实验的影响大吗?
搅拌功率90w,这只是额定功率,具体要看你调节的转速;
买一个微量注射器就好了,滴加慢一点。
滴加速率影响比较大
请问有KH550 改性的文献吗?也想改性,谢谢~
Typically, 12 mL
MNCs water dispersion, 80 mL ethanol, and 4 mL ammonium hydroxide were
mixed together in a three-neck ask. For each 20 min, 0.4 mL
TEOS was slowly injected in. The thickness of silica shell can be
determined by the times of the injection of TEOS. For Fe3-
O4@SiO2 described in the main text, TEOS was injected three
times. The coating process was conducted under vigorous
mechanical stirring and 50℃ water bath
,
With vigorously stirring, 400μL of APTES and
600 L of ammonia were added to 50 mL of Fe3O4@SiO2
MNPs solution suspended in 95% ethanol/water solution.
To enhance covalent bonding of the amine groups to
the silica nanoparticle surface, the mixture was reacted
for 4 h. The black precipitates were washed 3 times
with ethanol and the obtained APTES-functionalized
Fe3O4@SiO2 MNPs were re-dispersed in ethanol.