x*******6
发帖数: 994 | 1 现在在做碳黑分散在水或有机溶剂中，准备先对碳黑作酸处理，然后加分散剂， 考虑
用non-ionic surfactant, Triton X100. 当分散剂加到一定剂量， 如 2 wt% 以上时
（比如2 wt%, 2.5 wt% 和3.0 wt%），suspension 放很长时间不再sediment. 但不知
如何表征2 wt%, 2.5 wt% 和3.0 wt%之间的差别， 也可能溶液太黑，分辨不出具体差
别。另一问题是，怎样分析上述溶液的溶解度， 也就是分析碳黑在溶液中可分散的最
大量。 本人没有表面化学，有机和高分子的背景，希望大牛给点解释，并推荐分析方
法或文献。 多谢。 |
|
k*******n
发帖数: 2399 | 2 有的加一起会neutralize，相反emulsion不稳定。
★ 发自iPhone App: ChineseWeb 7.8 |
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e****e
发帖数: 2740 | 3 我记得好像学高分子滑雪的时候说乳化能够比较好的降温，并且对控制链长有好处，但
是记不清了，毕竟本科之后就再也没有接触过了。 |
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k*******n
发帖数: 2399 | 4 Emulsion polymerization 是唯一长碳联而且增加聚合速度的方法。
★ 发自iPhone App: ChineseWeb 7.8 |
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b****m
发帖数: 366 | 5 【 以下文字转载自 NanoST 讨论区 】
发信人: blehum (lemon), 信区: NanoST
标 题: Scientist Position available at Cabot Corp.
发信站: BBS 未名空间站 (Sun Jan 12 20:07:34 2014, 美东)
我所在公司新出来一个职位，介绍如下。
如果有人感兴趣，可以发站内信联系。我可以帮助内推。
https://nacareers-cabot.icims.com/jobs/3601/scientist/job?hub=9
Position Summary:
Cabot Inkjet Colorants are colloidal dispersions, made with proprietary
treating agents. They are used in highly complex fluids -- inkjet inks --
which are aqeuous systems, but include organic solvents, polymers and
surfac... 阅读全帖 |
|
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n******d
发帖数: 196 | 7 不一定要求全部找到，有几篇都行。
十分感谢！
n*********[email protected]
1 Journal of the American Oil Chemists’ Society, 47(2) 56, 1970.
2. Journal of Food Science, 55(1): 236-24, 1990.
3. Journal of Brazilian Chemical Society, 9(1):199-210, 1998.
4. Journal of the American Oil Chemists’ Society, 44(5): 307-30, 1967.
5. Journal of the American Oil Chemists’ Society, 55: 398-401, 1978.
6. Journal of Surfactants and Detergents, 4(4):407-414, 2001. |
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d********w
发帖数: 1110 | 8 难道不是中性的时候比较稳定吗？ Btw,上次我跟你说的我们用的surfactant是silwet |
|
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q****e
发帖数: 3660 | 10 Ester alkoxylation technology
Weerasooriya, Upali. Journal of Surfactants and Detergents vol 2, no. 3 (Jul
1999): 373-381.
Thank you! |
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M*******y
发帖数: 14 | 11 真诚的请求为化工/化学类杂志审稿的机会，今年的H1b没有抽上，希望能攒一些review
用来帮助申请绿卡。
我的方向是Colloid chemistry, surfactant/polymer chemistry,包括在Petroleum
phase behavior, enhanced oil recovery, water treatment等方面的应用，在这些领
域发表了近十篇文章和专利，有十篇审稿的经验，审稿认真负责，查阅资料尽量详尽，
提出意见谨求充分中肯。
如果有机会，请通过email联系我: gregyu at ou dot edu
小弟在此拜谢！ |
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s********t
发帖数: 5 | 12 【 以下文字转载自 Pharmaceutical 讨论区 】
发信人: surfactant (jobhunting), 信区: Pharmaceutical
标 题: 小cro formulation职业发展
发信站: BBS 未名空间站 (Thu Sep 17 16:36:15 2015, 美东)
在一个小CRO干formulation刚几个月，想请教一下大牛们以后的发展：
1. 现在的工作涉及小分子药的solid，emulsion，injectable好几种剂型，也有些GMP
的经验，2-3年后这样的经验跳大药厂容易么？ 是只能去generic，还是generic，
brand都可以去？ 以后的职业发展大致有哪些方向呢？
2. 感觉现在brand里面招bio formulation的挺多，bio formulation能从小分子
formulation转过去么？
3. 未来5-10年，小分子的formulation的市场行情是看涨呢还是看跌呢？ 身处东岸，
总觉得药行业不稳定，总想着未雨绸缪......
若不方便，可以站内信回复。多谢各位了！ |
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q****i
发帖数: 6923 | 13 Nanoporous Organosilicas: Periodic Materials Synthesized with
Surfactant Templates in Acidic Media
Mark C. Burleigh Michael A. Markowitz Mark S. Spector Bruce P. Gaber
J. Phys. Chem. B, 2002, 106 (38), pp 9712–9716
http://pubs.acs.org/doi/abs/10.1021/jp025515m |
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q****i
发帖数: 6923 | 14 Formation of Single-Phase Microemulsions in Toluene/Water/Nonionic
Surfactant Systems
Albert J. Gotch Gary W. Loar Aaron J. Reeder Ellen E. Glista
Langmuir, 2008, 24 (9), pp 4485–4493 |
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P********n
发帖数: 372 | 16 Title: Laboratory Technician/Chemist
Location: Houston TX, 77082
Job Summary:
· The technical service /development chemist will provide hands-on
laboratory support to solve various customer problems and generate
innovative technical solutions that support current business and generate
new business growth opportunities
Specific duties include:
· Assisting in the technical transfer of new technology/product and
technical service request for a Global Key Account
· Conducting... 阅读全帖 |
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l****h
发帖数: 51 | 17 求审稿机会，请站内联系或email: [email protected]/* */
背景关键词：colloids, surfactants, lubricants, polymers, biomaterials
多谢多谢！ |
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c********n
发帖数: 176 | 18 【 以下文字转载自 Chemistry 讨论区 】
发信人: coolsaturn (saturn), 信区: Chemistry
标 题: 请教个问题。
发信站: BBS 未名空间站 (Tue Oct 9 16:03:24 2007)
我想找几种surfactants在美国工业产量的历史数据，请问哪位能指点下应该怎么去找
？我试了google不大能找到。多谢了！ |
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S*****i
发帖数: 28 | 19 大家好：
我是即将于2011年底毕业的环境工程Ph.D.。从去年开始陆续在一些学术会议中参加招
聘会，修改简历，了解工程界的市场形势和对员工的需求。最近注册了Mitbbs和一些专
业论坛，对找工作这个系统工程有了一个大致的了解，这里也要感谢众位前辈的经验。
今天是第一次发帖，算是给自己的找工作历程标记一个开始。找工作不同于申请或者作
研究，不是一个人单打独斗。所以希望在这里能和大家多交流经验，分享信息，同时也
是互相鼓励。下面附上我自己的的简历，希望大家能够不吝赐教，多提建议。另外我会
陆续把我的一些个人经验发上来。谢谢！
关于简历：我现在主要的目标是Consulting公司中的Scientist/Engineer。我在国内的
本科和硕士专业分别是给排水工程和市政工程，无论是工程还是研究经验都是偏重于水
和废水处理技术的应用，来美国后做的研究则偏向Science。客观评价的话，我的实际
操作能力较强，性格很开朗，善于交流，喜欢学习新知识，所以感觉Consulting应该是
个不错的尝试，而一份目的明确的简历则是这个尝试的开始。考虑到这个目标，我的简
历是否过于偏重自己的研究经验了呢？G... 阅读全帖 |
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w********h
发帖数: 12367 | 20 Mesophases of Diblock Copolymers in Solution
Collaborators – Prof. R.A. Register, Chiajen Lai
Funding - National Science Foundation (Princeton Center for Complex
Materials)
Amphiphiles, such as surfactants and block copolymers, spontaneously
self-assemble in order to minimize interactions between their incompatible
components. In the bulk or concentrated solutions highly regular structures
with periodicity in the nanometer range emerge, according to principles that
are reasonably well-defined f |
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b**s
发帖数: 589 | 21 欢迎新成员playbooy, macromolecules-surfactant interaction专家
附所有成员表 |
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p******y
发帖数: 8 | 22 最近要利用光散射检测surfactants和PEG的混合溶液,想了解一下
如果单独 只有PEG,光散射能检测到哪些性质,thx a lot
你让我喝却不让我醉。 |
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c*s
发帖数: 2145 | 23 ft, I am not synthesisze alloy.
But, as I think, you should mix teh precursors of Pt and Ni, generally their
salt, in solution and reduce it by DMF or NabH4 in the presence of surfactant.
Since Ni is relatively active, the reaction should carried our in organic
solvants, such as alchohol. |
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a***n
发帖数: 578 | 24 Thanks a lot.
Another question: Can metal nanoparticle be made by ball milling technique?
I thought that to mix Ni and Pt and send the mixture into ball milling machine
and it will be done.
is my thought reasonable? Thanks again.
surfactant. |
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c*s
发帖数: 2145 | 25 you can try to use surfactant and purify the particles by dialysis and by
using ion-exchaging resin.
I do know some guys doing in this way.
可
问
现
有
简
多 |
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c****n
发帖数: 134 | 26 I am preparing amphiphilic block copolymers: polyisobutylene-b-poly(vinyl
alcohol).
It is expected that the block copolymers is water soluble when the PIB segment
is short enough, so I can get water soluble surfactants.
however when DPn of the PIB segment is 50 or even 15, and the DPn of PVA is
200-260,
the block copolymers are not soluble in water.
when I use DMSO (a good solvent for PVA), the block copolymers are dissolved.
Any comments on this? Thanks a lot. |
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d*****s
发帖数: 33 | 27 来自主题: Macromolecules版 - 换种说法 我记得有卖的POLYSTYRENE的小球就是MONODISPERSE的呀,各种大小都有,是怎么作出来的
呢?
溶
高分子溶解在有机溶剂中，在超声波的作用下从微孔中inject到溶有surfactant
不 |
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d*****s
发帖数: 33 | 28 来自主题: Macromolecules版 - 换种说法 找到一篇,象是方法2,可以做到5微米
Journal of Controlled Release 73 (2001) 59–74
Fabrication of PLG microspheres with precisely controlled and
monodisperse size distributions
Cory Berkland , Kyekyoon (Kevin) Kim , Daniel W. Pack
溶
高分子溶解在有机溶剂中，在超声波的作用下从微孔中inject到溶有surfactant
不 |
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p*****x
发帖数: 68 | 29 来自主题: Macromolecules版 - 换种说法 i think freeze dry will work
溶
高分子溶解在有机溶剂中，在超声波的作用下从微孔中inject到溶有surfactant
不 |
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c*s
发帖数: 2145 | 30 regarding the gel solutions in the existence of salt (like NaCl), I think it
should be stable if the salt concentration is not too high.(otherwise it will
screen the charge)
it should be OK to stabilize the NPs.after all, ppl use PVP as template for
inorganic NP synthesis.
polyelectrolyte is a polymer containing high density of charged function
group. as an example, linear poly(acrylic acid) , a weak polyelectrolyte
NaCl)?
them,
viscous
surfactants |
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r*******t
发帖数: 367 | 31 need to use ion exchange resin to remove SDS
which kind of resin should I choose?
thx! |
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c*s
发帖数: 2145 | 32 let me check and get back to you :) |
|
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y***e
发帖数: 6082 | 34 用半透膜渗析就行了
overnight
need to use ion exchange resin to remove SDS
which kind of resin should I choose?
thx! |
|
|
w***o
发帖数: 3830 | 36 来自主题: Macromolecules版 - for NP depends on ur pendent group that introduced by surfactant |
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y***e
发帖数: 6082 | 37 用了surfactant就不好玩了
想问一下有没有人在单一水溶液里用NaBH4还原法制备金属NANOPARTICLES！你们在水里加
表面活性剂吗？没有的话，生成的NANOPARTICLES很容易形成CLUSTER。Thanks! |
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c***r
发帖数: 3965 | 38 能破坏perylene tetracarboxylic bisimide的聚合体啊?
谁知道? |
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l***r
发帖数: 169 | 39 我不是和你说过了么,这个东西司机他们家总用....EMILY肯定知道... |
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b*******n
发帖数: 29 | 40 Oh boy....
A and B are bi-continuously dispersed.
Then what is the point to discuss who is in who?
Are you working with polymeric surfactant?
Bi-continuously dispersed system is too concentrated
to apply simple SANS model without huge modification. |
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b*******n
发帖数: 29 | 41 Could you provide the exact paper citation, or tell us more about
the sample composition? Is it one-phase binary system, which is almost
impossible?
By the way, for Nafion ,
((CF2)6.5CF(CF2)6.5)n
|
OCF2CF(CF3)OCF2CF2SO3H
if n is not too large, I believe Nafion can be treated as surfactant.
Then the phase behavior and SANS model have been widely investigated
in the literature.
Good luck.
me,
D2O
they
one |
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b*******n
发帖数: 29 | 42 The phase separation in a binary system will keep going till
it reaches two layers. SANS of a two phase sample, especially
a low viscosity sample, is very noisy and hard to reproduce.
Nafion cannot be considered as surfactant(n is tooo large) then.
Let me quickly go through the paper first. |
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m******k
发帖数: 447 | 43 How to avoid the formation of micelles when using PVA as the surfactant in
the suspension polymerization?
It's so hard to filter when the suspension reaction is done. So many papers
showed they used filtration method to separate particles from water phase. I
don't know how they make it. I cannot use centrifuge and decant method
because of ....
This question bother me so much. Tons of thanks for any suggestion. |
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c*****e
发帖数: 238 | 44 yes, the microscopic size is smaller, but still a micellar solution.
cmc is like a critical point. |
|
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n*******r
发帖数: 213 | 46 how do you know it is not emulsion? maybe he did use surfactant
deformed
just |
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c*s
发帖数: 2145 | 47 你觉着合成表面活性剂有没有前途？ 就是polymeric surfactant |
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c*s
发帖数: 2145 | 48 hehe,我试图促使相关人士“有压力的思考”， 过后你会感到如释重负的愉悦，呵呵
其实我也有点迷糊，正在做一个all acrylic surfactant，不知道咋吹
come on, u r a BAN ZHU now. don't be so mean. it could be someone's phd
project.
can |
|
r******e
发帖数: 7 | 49 大家好，我手上有一个CMU的MCPS项目的AD，全称叫做master of colloidal polymer
and surfaces. 是工程院和理学院合办的项目，隶属于化工学院下面。他的课程相比于
传统化工来说比较偏化学。
请问大家这个项目和Columbia的化工MS相比是否值得去？我是打算MS毕业后直接工作的
，目前暂时没有读phd的打算.
希望大家能够解答，谢谢大家了！
下面是他的课程表：
MSCPS Catalog
Required Courses
Course # Units
Thermodynamics: One Graduate-Level Course
06-705 Adv. Chemical Engineering Thermodynamics OR 12
09-611 Chemical Thermodynamics (mini A2) 6
09-603 Math Analysis for Chemistry(mini A1) 6
Colloids, Po... 阅读全帖 |
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x*******6
发帖数: 994 | 50 现在在做碳黑分散在水或有机溶剂中，准备先对碳黑作酸处理，然后加分散剂， 考虑
用non-ionic surfactant, Triton X100. 当分散剂加到一定剂量， 如 2 wt% 以上时
（比如2 wt%, 2.5 wt% 和3.0 wt%），suspension 放很长时间不再sediment. 但不知
如何表征2 wt%, 2.5 wt% 和3.0 wt%之间的差别， 也可能溶液太黑，分辨不出具体差
别。另一问题是，怎样分析上述溶液的溶解度， 也就是分析碳黑在溶液中可分散的最
大量。 本人没有表面化学，有机和高分子的背景，希望大牛给点解释，并推荐分析方
法或文献。 多谢。 |
|
