Controlled Synthesis of Two-Dimensional Networked Gold Nanowires and Microkites by Sodium Carboxymethyl Cellulose-Surfactant Soft Template

2011 ◽  
Vol 399-401 ◽  
pp. 585-588 ◽  
Author(s):  
Chun Rong Wang ◽  
Xian Zai Yan ◽  
Li Li Yu ◽  
Huang Zhou
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Dodecyl ◽  
Potential Method ◽  
Sodium Carboxymethyl Cellulose ◽  
Soft Template ◽  
Controlled Synthesis ◽  
Gold Nanowires ◽  
Two Dimensional ◽  
Anionic Polymer ◽  
Metal Structures

A novel soft template method is reported to control gold nano or microstructrues. Gold nanowires with two-dimensional (2-D) network structure were prepared by anionic polymer (sodium carboxymethyl cellulose, CMC) reduction of HAuCl4. Big gold microkites were synthesized using CMC-cationic surfactant (dodecyl trimethyl ammonium chloride, DTAC) templates. Quasi-sphericSubscript textal gold nanopartilces were obtained through CMC-anionic surfactant (sodium dodecyl sulfate, SDS) templates. Electron diffraction suggested that the 2-D networked nanowires and microkite heads were single crystalline. Ultraviolet visible (UV-vis) absorption spectrum of gold structure obtained showed that there were anisotropic structure formed in reacted solutions. It is potential method to gain preferred noble metal structures by this soft template.

A small molecular, a big scissoring effect: sodium dodecyl sulfate working on two-dimensional metal organic frameworks

CrystEngComm ◽  
2021 ◽  
Author(s):  
Qing Luo ◽  
Zhen Ding ◽  
Huamin Sun ◽  
Zhen Cheng ◽  
Naien SHI ◽  
...  
Keyword(s):  
Sodium Dodecyl Sulfate ◽  
Active Sites ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Sodium Dodecyl ◽  
Advanced Materials ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Dodecyl Sulfate ◽  
Metal Organic

Ultrathin two-dimensional (2D) metal-organic framework (MOF) nanosheets are prosperous advanced materials due to their particularly thin thickness and exposed active sites. The difficulty in the controlled synthesis of 2D MOF...

Preparation of CMC-Stabilized FeS Nanoparticles and their Enhanced Performance for Cr(VI) Removal

2011 ◽  
Vol 287-290 ◽  
pp. 96-99 ◽  
Author(s):  
Xian Biao Wang ◽  
Jin Liu ◽  
Dong Lin Zhao ◽  
Xiao Jie Song
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Soft Template ◽  
Sulfur Source ◽  
Uniform Size ◽  
Synthetic Process ◽  
Transmission Electron ◽  
Facile Route

FeS nanoparticles with uniform size have been prepared through a facile route using (sodium carboxymethyl cellulose) CMC as soft template. The nanoparticles are about 4-6 nm by observation of transmission electron microscopy (TEM). The CMC template could also stabilize the FeS nanoparticles and resist aggregation. It is important to note that the size of nanoparticles can be easily controlled by the concentration of iron and sulfur source during the synthetic process. Interestingly, the FeS nanoparticles could assemble into rod-like morphology at higher concentration. More importantly, the CMC-stabilized FeS nanoparticles exibit enhanced performance for Cr(Ⅵ) removal as compared with FeS synthesized without CMC stabilizer.

Study on the Interaction of Cationic Gemini Surfactant with Sodium Carboxymethyl Cellulose

2021 ◽  
Vol 58 (1) ◽  
pp. 13-19
Author(s):  
Zheng Zhu ◽  
Xiaohao Lu ◽  
Liangliang Lin ◽  
Hujun Xu ◽  
Haiyan Gao
Keyword(s):  
Surface Tension ◽  
Carboxymethyl Cellulose ◽  
Gemini Surfactant ◽  
Polymer Concentration ◽  
Co Adsorption ◽  
Sodium Carboxymethyl Cellulose ◽  
Shielding Effect ◽  
Anionic Polymer ◽  
Surface Tension Data ◽  
Cationic Gemini Surfactant

Abstract In the present study, the interaction of the anionic polymer sodium carboxymethyl cellulose (NaCMC) with the two cationic gemini surfactant (C12-(EO)-E-C12 and C12-(EO)2-E-C12) has been investigated by surface tension and turbidity measurements. The co-adsorption of the polymer and the surfactants as well as the formation of highly surface-active polymer-surfactant complex was observed. By inserting the surface tension data into the Gibbs equation it could be shown that the surface layers of the mixed solutions have a multi-level adsorption structure. Comparing the critical adsorption concentration (C1), the critical saturation concentration (C2) and the critical micelle formation concentration (C3) of mixtures with different concentrations, it can be seen that all variables increase with the increase in polymer concentration. In addition, the inorganic salt (NaBr) greatly influences the C1, C2 and C3. The salt effects depend on the competition between the salt-enhancing effect and the salt-shielding effect.

Complex formation of modified chitosan and carboxymethyl cellulose and its effect on paper properties

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 29-35 ◽  
Author(s):  
PEDRAM FATEHI ◽  
LIYING QIAN ◽  
RATTANA KITITERAKUN ◽  
THIRASAK RIRKSOMBOON ◽  
HUINING XIAO
Keyword(s):  
Carboxymethyl Cellulose ◽  
Polymer System ◽  
Layer By Layer ◽  
Paper Strength ◽  
Anionic Polymer ◽  
Paper Properties ◽  
Modified Chitosan ◽  
Layer By Layer Assembly ◽  
Polyelectrolyte Titration ◽  
Layer Assembly

The application of an oppositely charged dual polymer system is a promising approach to enhance paper strength. In this work, modified chitosan (MCN), a cationic polymer, and carboxymethyl cellulose (CMC), an anionic polymer, were used sequentially to improve paper strength. The adsorption of MCN on cellulose fibers was analyzed via polyelectrolyte titration. The formation of MCN/CMC complex in water and the deposition of this complex on silicon wafers were investigated by means of atomic force microscope and quasi-elastic light scattering techniques. The results showed that paper strength was enhanced slightly with a layer-by-layer assembly of the polymers. However, if the washing stage, which was required for layer-by-layer assembly, was eliminated, the MCN/CMC complex was deposited on fibers more efficiently, and the paper strength was improved more significantly. The significant improvement was attributed to the extra development of fiber bonding, confirmed further by scanning electron microscope observation of the bonding area of fibers treated with or without washing. However, the brightness of papers was somewhat decreased by the deposition of the complex on fibers. Higher paper strength also was achieved using rapid drying rather than air drying.

Effects of Trehalose and Sodium Carboxymethyl Cellulose on Prevention of Organ Adhesion after Laparotomy: A Preliminary Study

2009 ◽  
Vol 40 (2) ◽  
pp. 19-26 ◽  
Author(s):  
Soojung LEE ◽  
Yasutsugu MIWA ◽  
Ryohei NISHIMURA ◽  
Ung-il CHUNG ◽  
Shigeki SUZUKI ◽  
...  
Keyword(s):  
Carboxymethyl Cellulose ◽  
Sodium Carboxymethyl Cellulose ◽  
Preliminary Study

Seeded Growth of Single-Crystal Two-Dimensional Covalent Organic Frameworks

2017 ◽  
Author(s):  
Austin M. Evans ◽  
Lucas R. Parent ◽  
Nathan C. Flanders ◽  
Ryan P. Bisbey ◽  
Edon Vitaku ◽  
...  
Keyword(s):  
Molecular Transport ◽  
Controlled Synthesis ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Seeded Growth ◽  
Covalent Bonds ◽  
Crystalline Materials ◽  
Step Procedure ◽  
Structures And Properties ◽  
2D Polymer

<div> <div> <div> <p>Polymerizing monomers into periodic two-dimensional (2D) networks provides structurally precise, atomically thin macromolecular sheets linked by robust, covalent bonds. These materials exhibit desirable mechanical, optoelectrotronic, and molecular transport properties derived from their designed structure and permanent porosity. 2D covalent organic frameworks (COFs) offer broad monomer scope, but are generally isolated as polycrystalline, insoluble powders with limited processability. Here we overcome this limitation by controlling 2D COF formation using a two- step procedure. In the first step, 2D COF nanoparticle seeds are prepared with approximate diameters of 30 nm. Next, monomers are slowly added to suppress new nucleation while promoting epitaxial growth on the existing seeds to sizes of several microns. The resulting COF nanoparticles are of exceptional and unprecedented quality, isolated as single crystalline materials with micron-scale domain sizes. These findings advance the controlled synthesis of 2D layered COFs and will enable a broad exploration of synthetic 2D polymer structures and properties. </p> </div> </div> </div>

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