查看完整版本: 碳纳米管的分散技术和方法

碳纳米管的分散技术和方法

[size=4][color=DarkGreen][b]碳纳米管的团聚也是影响纳米管应用的主要因素之一。这里汇集这方面的资料，欢迎大家讨论和添砖加瓦。[/b]
8an1y*h0su [b]先介绍几篇中文的资料[/b][/color][/size]
,Y)D{)O Rl [quote]8G1bk*c[)V2` r
[align=center][b]碳纳米管分散形态的电镜研究曹建明[/b]
CwJ!V5h$v'd/f ~ [/align]
:}.p.K VN7H [align=center]<<[url=http://scholar.ilib.cn/Periodical.aspx?P=dzxwxb][color=#0000ff]电子显微学报[/color][/url] >>[url=http://scholar.ilib.cn/Issue.aspx?p=dzxwxb&y=2003&i=05][color=#0000ff]2003年05期[/color][/url]&S zLf dv[
[/align]
.D)ln,X-d*aP [align=center][url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e8%83%a1%e5%85%83%e4%b8%ad][color=#0000ff]胡元中[/color][/url] , [url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e9%bb%84%e5%85%b0][color=#0000ff]黄兰[/color][/url] , [url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e7%8e%8b%e6%85%a7][color=#0000ff]王慧[/color][/url] , [url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e6%9d%8e%e9%b9%8f][color=#0000ff]李鹏[/color][/url] , [url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e5%bc%a0%e5%ae%87%e5%86%9b][color=#0000ff]张宇军[/color][/url] , [url=http://service.ilib.cn/Search/QikanSearchList.aspx?Query=%e8%83%a1%e6%b4%81][color=#0000ff]胡洁[/color][/url] Z%L [G)^#^
[/align]
!u#bO#z7I7W 6f!trM/Zh R4I1D8M
未经处理的碳纳米管常呈现团聚形态.然而,团聚形态对进一步深入研究碳纳米管的性能与应用造成了很大的局限,所以,碳纳米管的有效分散至关重要.现在国内虽已对碳纳米管的分散进行了一定的探索,但却未能对分散条件进行定量标定.本文采取超声波振荡的方法进行分散,并细致、深入地探讨了不同分散条件对碳纳米管分散形态的影响,从而说明选用适当的碳纳米管原料、延长超声振荡时间以及降低悬浮液浓度都将有利于碳纳米管的充分分散.Mk&p(wn
[url=http://scholar.ilib.cn/Abstract.aspx?A=dzxwxb200305012]:fulltext[/url]4d7T'UY ]TA}
[/quote]
$|t+?'~G-u
q6k6Z8ealv~+O [[quote]tG3IDF#@$N [5K
[align=center][url=http://www.google.com/url?sa=t&ct=res&cd=14&url=http%3A%2F%2Fwww.spm.com.cn%2Fpapers%2Fp132.pdf&ei=bFZuRZPuJpf2oAK9wLzoDA&usg=__DNm_UKoXwiUwjbGK8DuOxzZCejg=&sig2=O-4R2loLfC3XuQBSG0W1WA][color=#0000ff]碳[/color][color=#cc0033]纳米管[/color][color=#0000ff]在水中的[/color][color=#cc0033]分散[/color][color=#0000ff]性[/color][/url]Cg+b/H$En3j5k
[/align]
Yd3te(NH/o(DP8V [size=2]Eiza$~!J$`p
[/size][align=center][font=Times][size=3][font=Times][size=11px]曹建明[/size][/font][/size][/font] Fm,q2H:Qe&j\
[/align]IT4uK+V(tBt
[align=center][font=Times][size=3][font=Times][size=11px][font=Times][size=3][font=Times][size=11px]（深圳大学，广东 深圳 518060[/size][/font][/size][/font][/size][/font][/size][/font]7[3{ w$MY1|_!I P
[/align]
{X+R*b&kt;Yt [size=2]以超[/size][size=2]声波为辅助工具，分别研究阳离子、阴离子型等表面活性剂在水中对碳[color=#cc0033]纳米管分散[/color]. 性的影响，进而研究两种表面活性剂 [b]...[/b] [/size] \MK5oO;X
La3p
[font=Times][size=3][font=Times][size=11px]
:ca5A"z2{n"L2Rd [font=Times][size=3][font=Times][size=11px][font=Times][size=3][font=Times][size=11px]?S0p,| {!JFF
$Op2Ntm7To"\
v~N"d6P4ix
[size=2]:[url=http://www.spm.com.cn/papers/p132.pdf]:pdf[/url][/size]/eW3T*BE
[size=2][/quote][/size]oXA _9l'An
qY
[size=2][/size]y%q S$i |m'P

%QP$^2C}k [/size][/font][/size][/font][/size][/font][/size][/font][/size][/font][/size][/font]

可以下载,不错,先下来再说;P ;P

好人那，感谢分享！

[align=center][size=3][color=darkgreen][b]Dispersion and solubilization of carbon nanotubes.[/b][/color][/size][/align][align=center][url=http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Search&itool=pubmed_AbstractPlus&term=%22Fu+K%22%5BAuthor%5D][b][size=3][color=darkgreen]Fu K[/color][/size][/b][/url][size=3][color=darkgreen], [/color][/size][url=http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=pubmed&cmd=Search&itool=pubmed_AbstractPlus&term=%22Sun+YP%22%5BAuthor%5D][b][size=3][color=darkgreen]Sun YP[/color][/size][/b][/url][size=3][color=darkgreen].[/color][/size][/align][align=center][size=3][color=darkgreen]J Nanosci Nanotechnol. 2003 Oct;3(5):351-64.[/color][/size][/align][list=1][size=3][color=darkgreen][/color][/size][/list][size=3][color=darkgreen]Department of Chemistry, Center for Advanced Engineering Fibers and Films, Howard L. Hunter Chemistry Laboratory, Clemson University, Clemson, South Carolina 29634-0973, USA.[/color][/size]v*n5fBPXz
[size=3][color=darkgreen][/color][/size]
,aC g9^4Z1fu [size=3][color=darkgreen]
;v k3m$qO2] 1Qf1D;pS5Q.A`VA
Carbon nanotubes are generally insoluble in any solvents, resulting in their poor processability for many proposed potential applications. Several strategies have been developed to introduce carbon nanotubes into solvent systems, including dispersion and suspension under special experimental conditions and the chemical modification and functionalization. The well-dispersed and solubilized carbon nanotubes make it possible to characterize and study the carbon nanotubes by using solution-based techniques, to realize some of the unique properties of the nanotubes, and to carry out further chemical transformations. In this review, recent development in the experimental methods for the dispersion and solubilization of carbon nanotubes will be summarized and discussed.x3zC5BiH

{u&E~B_ YzAE$K?9{ [/color][/size]

[align=center][size=3][color=darkgreen][b]The role of surfactants in dispersion of carbon nanotubes.
-{3d&u3U _:`)i [/b][/color][/size][/align][align=center][size=3][color=darkgreen]    [/color][/size][/align][align=center][size=3][color=darkgreen] Vaisman L,       Wagner HD,    * Marom G.[/color][/size][/align][size=3][color=darkgreen]n!sC
fZ$Vmn7a6I'[F
[/color][/size][align=center][size=3][color=darkgreen]Adv Colloid Interface Sci. 2007 Jan 9,in press; DOI: 10.1016/j.cis.2006.11.007 [/color][/size][/align][size=3][color=darkgreen]7X i\RkT {tH
Casali Institute of Applied Chemistry, The Hebrew University of Jerusalem, 91904 Jerusalem, Israel; Department of Materials and Interfaces, Weizmann Institute of Science, 76100 Rehovot, Israel.
D#y9yHA,@
*u-R1R4_T The discovery of carbon nanotubes offers exciting opportunities for the development of novel high property materials. Disaggregation and uniform dispersion are critical challenges that must be met to successfully produce such high property materials, since carbon nanotubes tend to self-associate into micro-scale aggregates. This results in products with inferior mechanical and electric performance. Recognizing this problem, extensive research has been reported in the literature on development of dispersion technologies based on both mechanical and chemical approaches. Here, we review recent progress and advances that have been made on dispersion of carbon nanotubes in aqueous and organic media by non-covalent adsorption of surfactants and polymers. Carbon nanotube structure, properties and mainly self-assembly are discussed in detail.
(E%S[,@k [url=http://imageshack.us][img]http://img441.imageshack.us/img441/2770/7664iz0.jpg[/img][/url]wYD ^6Za
[/color][color=dimgray]Schematic representations of the mechanism by which surfactants help to disperse SWNT. (a) SWNT encapsulated in a cylindrical surfactant micelle (both cross section and side-view); (b) hemimicellar adsorption of surfactant molecules on a SWNT; (c) random adsorption of surfactant molecules on a SWNT"N%^yWr(Q-V;w
d$A

+a%W f3U7E&Rj6p-? ~
-A0s ?v n-@6ak9p [b]Article Outline[/b]
}*[)@\vx*@ C;{ /\{%~~"_7F8r
[color=Blue]1. Introduction[/color]
*z:gMW_8G [color=Blue]2. Carbon nanotubes[/color]9\~Y7Z{8t'd
9w*[m&EVc_
[color=Blue]2.1. Structure and properties of carbon nanotubes[/color]
'TeK G2hFR;d [color=Blue]2.2. Aggregation and poor solubility of carbon nanotubes[/color]0eVRx-v4H#j
[color=Blue]2.3. Current approaches for dispersing carbon nanotubes[/color]
qpO*O i8l-W? ,_Q
{9C'xcXD
[color=Blue]3. Characterization of CNT dispersion[/color])b.B7[J l;Io
[color=Blue]4. Specific applications of surfactants for dispersing carbon nanotubes[/color]
)}n\PZ0R6t7v`
,uX:W4J;GG [color=Blue]4.1. Water-soluble dispersions of carbon nanotubes[/color]
m/W2Hy4VI&\ Gav2W [color=Blue]4.2. Dispersions of carbon nanotubes in organic solvents[/color]7j2QVv f2S
[color=Blue]4.3. Stabilization of carbon nanotube dispersions by polymers[/color]
3N$U!vyF|m%v YU1R]9Be C$o`
[color=Blue]5. Conclusions[/color]M)Ey&If(\:c
[color=Blue]Acknowledgements[/color])i"`nv8sq?
[color=Blue]References[/color]
(Cn$`G-k8Ra-O [/color][/size]

[align=left][size=3][color=darkgreen][b]Sidewall functionalization of single-walled carbon nanotubes by addition of dichlorocarbene[/b].

s]DOo`^9\Hm
3W4RNLGOK y     * Hu H,     * Zhao B,    * Hamon MA,    * Kamaras K,    * Itkis ME,    * Haddon RC.*g3M$Rn}]
HN Z)M"|}pP
J Am Chem Soc. 2003 Dec 3;125(48):14893-900.L"m8Z,t,Z]

MTS3Vo/E Center for Nanoscale Science and Engineering, Departments of Chemistry and Chemical & Environmental Engineering, University of California, Riverside, CA 92521-0403, USA.ak]$yZt!U\?
7Y d]4C*X[UCB
We report the sidewall functionalization of soluble HiPco single-walled carbon nanotubes (SWNTs) by addition of dichlorocarbene. The dichlorocarbene-functionalized SWNTs [(s-SWNT)CCl(2)] retain their solubility in organic solvents such as tetrahydrofuran and dichlorobenzene. The degree of dichlorocarbene functionalization was varied between 12% and 23% by using different amounts of the dichlorocarbene precursor. Because the addition of dichlorocarbene saturates the carbon atoms on the sidewall of the SWNTs and effectively replaces the delocalized partial double bonds with a cyclopropane functionality, the optical spectra of the SWNTs change dramatically. We estimate that the saturation of 25% of the pi-network electronic structure of the SWNTs is sufficient to remove all vestiges of the interband transitions in the infrared spectrum. The transitions at the Fermi level in the metallic SWNTs that appear in the far-infrared (FIR) region of the spectrum show a dramatic decrease of intensity on dichlorocarbene functionalization. The FIR region of the spectrum allows a clear differentiation between the covalent and the ionic chemistry of SWNTs. In contrast with covalent functionalization, we show that reaction of the SWNTs with bromine vapor leads to a strong increase in absorptions at the Fermi level that is observable in the FIR due to hole doping of the semiconducting SWNTs. Thermal treatment of the (s-SWNT)CCl(2) above 300 degrees C resulted in the breakage of C-Cl bonds, but did not restore the original electronic structure of the SWNTs.[/color][/size][/align]

[align=center][size=3][color=darkgreen][b]Sidewall carboxylic acid functionalization of single-walled carbon nanotubes.[/b]
C.O.Y9M9R:];M#`6E     [/color][/size][/align][align=center][size=3][color=darkgreen]* Peng H,    * Alemany LB,    * Ma Mgrave JL,    * Khabashesku VN.$~:`5{ oSP
[/color][/size][/align][align=center][size=3][color=darkgreen][b][i]J Am Chem Soc.[/i][/b] 2003 Dec 10;[b]125[/b](49):15174-82[/color][/size][/align][align=center][size=3][color=darkgreen][/color][/size][/align]
%SGi/WX&I
5A.] j,pF/VDe*v%V [size=3][color=darkgreen]Department of Chemistry and the Center for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, Texas 77005-1892, USA.
a _~ \|l A
+u3mGF`cG The reactions of single-walled carbon nanotubes (SWNTs) with succinic or glutaric acid acyl peroxides in o-dichlorobenzene at 80-90 degrees C resulted in the addition of 2-carboxyethyl or 3-carboxypropyl groups, respectively, to the sidewalls of the SWNT. These acid-functionalized SWNTs were converted to acid chlorides by derivatization with SOCl(2) and then to amides with terminal diamines such as ethylenediamine, 4,4'-methylenebis(cyclohexylamine), and diethyltoluenediamine. The acid-functionalized SWNTs and the amide derivatives were characterized by a set of materials characterization methods including attenuated total reflectance (ATR) FTIR, Raman and solid state (13)C NMR spectroscopy, transmission electron microscopy (TEM), and thermal gravimetry-mass spectrometry (TG-MS). The degree of SWNT sidewall functionalization with the acid-terminated groups was estimated as 1 in 24 carbons on the basis of TG-MS data. In comparison with the pristine SWNTs, the acid-functionalized SWNTs show an improved solubility in polar solvents, for example, alcohols and water, which enables their processing for incorporation into polymer composite structures as well as for a variety of biomedical applications.[/color][/size]

:lol :lol :lol :lol :lol

呵呵呵呵呵    不错   有时间看看啊:lol :lol :lol

好文章，多謝樓主的分享!!!

好文章，谢谢！！！！！！！！！！！！！！！

能不能把文章下载下来，然后把文章占上去？

文章看不到，怎么发表意见？

最新进展

[url]http://nanost.net/bbs/thread-20800-1-1.html[/url]

回复 5# 的帖子

好东西，就要看看！好东西，就要看看！