m*****e 发帖数: 1506 | 1 关于surface的表征,感觉总是做了一堆说不清楚,怎样证明surface cross-linking发
生?光说phase-seperation似乎并不合理,因为amphiphilic的东西本身就有phase-
seperation。用AFM看到phase-seperation,但是contact angle却又给出高于100度,
这岂不变成了hydrophobic surface了?wetting以后,phase变化了,roughness也变化
了,好还是不好?有些文章说好,有些又claim不好。研究这玩意儿到底有没有意义?
是不是什么东西都复杂化了才好去蒙referee。看来还是做纯合成比较省心,NMR,GPC
就够了。 |
y****1 发帖数: 34 | 2 可以尝试一些其它手段去检测表明性质,如xps, atr-ip, x-peem 等,这些手段有时候
可以证明表面反应发生了没有。 |
r******0 发帖数: 2753 | 3 What do you mean "surface crosslinking"? |
d**a 发帖数: 3715 | 4 It is normal for the surface to be hydrophobic on your amphiphilic material
because the less polar component would like to expose to non-polar air
contact interface through chain reorganization even the surface has been
crosslinked. If there is a way you can achieve the surface by contacting
with a glass slide or silicon wafer, you will find the contact angle at the
resulting substrate contact interface will much lower. High resolution XPS
will be helpful to tell the difference on the chemical |
g***3 发帖数: 285 | 5 Sum frequency generation could be very useful. Probe polymer-air interface
before and after cross-linking.
GPC
【在 m*****e 的大作中提到】 : 关于surface的表征,感觉总是做了一堆说不清楚,怎样证明surface cross-linking发 : 生?光说phase-seperation似乎并不合理,因为amphiphilic的东西本身就有phase- : seperation。用AFM看到phase-seperation,但是contact angle却又给出高于100度, : 这岂不变成了hydrophobic surface了?wetting以后,phase变化了,roughness也变化 : 了,好还是不好?有些文章说好,有些又claim不好。研究这玩意儿到底有没有意义? : 是不是什么东西都复杂化了才好去蒙referee。看来还是做纯合成比较省心,NMR,GPC : 就够了。
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