c******h
发帖数: 4573 | |
w******r
发帖数: 43 | 2
dialysis, usually four days to one week.
【在 c******h 的大作中提到】
: 在水溶液中。
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c******h
发帖数: 4573 | 3 能详细点么？小弟着急啊
【在 w******r 的大作中提到】
:
: dialysis, usually four days to one week.
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w******r
发帖数: 43 | 4 You put the solution into a bag of semipermeable film, then put the bag into
wader. stir it. Change water every few hours in the first two days.
You can change the water much longer in last few days.
Usually, you should do this at least four days untial no or little small
molecules in outside water. If you want to quantitative data, you should run
chromatography.
BTW: Because I can not type Chinese. If you still want to know in detail, you
can send message to me.
good luck!
【在 c******h 的大作中提到】
: 能详细点么？小弟着急啊
|
c******h
发帖数: 4573 | 5 //3x //bow
因为最近国内在清查网络信息，我不能用telnet方式访问mit，真实faint
你做过PINPAM和SDS的分离？能不能给我详细介绍一下呢？
you
【在 w******r 的大作中提到】
: You put the solution into a bag of semipermeable film, then put the bag into
: wader. stir it. Change water every few hours in the first two days.
: You can change the water much longer in last few days.
: Usually, you should do this at least four days untial no or little small
: molecules in outside water. If you want to quantitative data, you should run
: chromatography.
: BTW: Because I can not type Chinese. If you still want to know in detail, you
: can send message to me.
: good luck!
|
w******r
发帖数: 43 | 6 就是把混合溶液放在半透膜里面，然后把半透膜放到水里面，不停的搅拌，
用magnetic stir. 前几天每个几个小时换一次水。
以后每天换一两次就可以拉。
大概四天到一礼拜的时间就可以把小分子渗透出来。
然后你就得到了PNIPAM的水溶液了。
我以前做过几次，欢迎讨论！
into
run
【在 c******h 的大作中提到】
: //3x //bow
: 因为最近国内在清查网络信息，我不能用telnet方式访问mit，真实faint
: 你做过PINPAM和SDS的分离？能不能给我详细介绍一下呢？
:
: you
|
c******h
发帖数: 4573 | 7 大约pnipam的浓度需要有限制么？
【在 w******r 的大作中提到】
: 就是把混合溶液放在半透膜里面，然后把半透膜放到水里面，不停的搅拌，
: 用magnetic stir. 前几天每个几个小时换一次水。
: 以后每天换一两次就可以拉。
: 大概四天到一礼拜的时间就可以把小分子渗透出来。
: 然后你就得到了PNIPAM的水溶液了。
: 我以前做过几次，欢迎讨论！
:
: into
: run
|
c*s
发帖数: 2145 | 8 btw, can I use reisen to remove surfactant?
In some cases, you can not completely remove surfactant using semipermeable
memberane.
detail,
【在 w******r 的大作中提到】
: 就是把混合溶液放在半透膜里面，然后把半透膜放到水里面，不停的搅拌，
: 用magnetic stir. 前几天每个几个小时换一次水。
: 以后每天换一两次就可以拉。
: 大概四天到一礼拜的时间就可以把小分子渗透出来。
: 然后你就得到了PNIPAM的水溶液了。
: 我以前做过几次，欢迎讨论！
:
: into
: run
|
c******h
发帖数: 4573 | 9
reisen是什么意思啊？
【在 c*s 的大作中提到】
: btw, can I use reisen to remove surfactant?
: In some cases, you can not completely remove surfactant using semipermeable
: memberane.
:
: detail,
|
c*s
发帖数: 2145 | 10 树脂啊,ft, resin
semipermeable
【在 c******h 的大作中提到】
:
: reisen是什么意思啊？
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c******h
发帖数: 4573 | 11 大侠给推荐一种树脂？俺那旮沓就是吸附与分离国家重点实验室
哈哈
【在 c*s 的大作中提到】
: 树脂啊,ft, resin
:
: semipermeable
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f********n
发帖数: 2 | 12 Can I ask you another question about the PNIPAM? I am trying to synthesis
PNIPAM microgels. From the literature, the "reactant NIPAM need to be
recrystallized frome Hexane/acetone solvent and the prodcuct need to be
precipitated by Hexane". I am so new about the polymer process and do not
understand what it mean recryliation and precipiation. Would you please tell
me tell me the recrystalliation process and precipation process in detail?.
Thank you so much
you
【在 w******r 的大作中提到】
: You put the solution into a bag of semipermeable film, then put the bag into
: wader. stir it. Change water every few hours in the first two days.
: You can change the water much longer in last few days.
: Usually, you should do this at least four days untial no or little small
: molecules in outside water. If you want to quantitative data, you should run
: chromatography.
: BTW: Because I can not type Chinese. If you still want to know in detail, you
: can send message to me.
: good luck!
|
F***F
发帖数: 7 | 13 This is a purification process. Coz NIPAAM monomers are well
dissolved in Hexane/acetone (I can not remember the volume ratio).
Then place it into refrigerator at 4 degree C for one night. Needle like
NIPAAM crystall can precipite at the bottom. The impurity still dissolve
in the solvent. You can use extraction method to separate crystal like NIPAA
M.
After that, you should use hexane to wash impurities out from NIPAAM, Coz tr
ace of impurity
absorb on the crystalls.
This is a general purificati
【在 f********n 的大作中提到】
: Can I ask you another question about the PNIPAM? I am trying to synthesis
: PNIPAM microgels. From the literature, the "reactant NIPAM need to be
: recrystallized frome Hexane/acetone solvent and the prodcuct need to be
: precipitated by Hexane". I am so new about the polymer process and do not
: understand what it mean recryliation and precipiation. Would you please tell
: me tell me the recrystalliation process and precipation process in detail?.
: Thank you so much
:
: you
|
