Purification, organophilicity and transparent fluorescent bulk material fabrication derived from hydrophilic carbon dots

RSC Advances ◽  
2015 ◽  
Vol 5 (19) ◽  
pp. 14492-14496 ◽  
Author(s):  
Xiangyang Chen ◽  
Zhijun Zhang ◽  
Jingtai Zhao
Keyword(s):  
Hydrothermal Method ◽  
Self Assembly ◽  
Carbon Dots ◽  
High Efficiency ◽  
Bulk Material ◽  
Assembly Strategy ◽  
Oil Water ◽  
Material Fabrication ◽  
First Time

High-efficiency oil/water interfacial self-assembly strategy has been used for the first time to purify hydrophilic CDs prepared by hydrothermal method.

scholarly journals Synthesis of aminated polystyrene and its self-assembly with nanoparticles at oil/water interface

e-Polymers ◽  
2020 ◽  
Vol 20 (1) ◽  
pp. 317-327
Author(s):  
Chenliang Shi ◽  
Ling Lin ◽  
Yukun Yang ◽  
Wenjia Luo ◽  
Maoqing Deng ◽  
...  
Keyword(s):  
Interfacial Tension ◽  
Self Assembly ◽  
Carbon Dots ◽  
Chain Transfer ◽  
Functionalized Polymers ◽  
Amino Groups ◽  
One Dimensional ◽  
Reversible Addition ◽  
Oil Water ◽  
Chain Transfer Polymerization

AbstractThe influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.

Synthesis of carbazole-based microporous polymer networks via an oxidative coupling mediated self-assembly strategy: from morphology regulation to application analysis

2019 ◽  
Vol 10 (12) ◽  
pp. 1489-1497 ◽  
Author(s):  
Yang Xu ◽  
Tianqi Wang ◽  
Buyin Shi ◽  
Shengguang Gao ◽  
Guojie Meng ◽  
...  
Keyword(s):  
Self Assembly ◽  
Oxidative Coupling ◽  
Polymer Networks ◽  
Efficient Strategy ◽  
Assembly Strategy ◽  
Microporous Polymer ◽  
Application Analysis ◽  
First Time

An efficient strategy to prepare morphology-tunable carbazole-based microporous polymer networks (C-MPNs) via an oxidative coupling mediated self-assembly strategy is reported for the first time.

Anti-fouling graphene oxide based nanocomposites membrane for oil-water emulsion separation

2017 ◽  
Vol 77 (5) ◽  
pp. 1179-1185 ◽  
Author(s):  
Yang Feng ◽  
Zhiwen Wang ◽  
Ruixue Zhang ◽  
Yuanyuan Lu ◽  
Yuqing Huang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Membrane Fouling ◽  
Self Assembly ◽  
High Efficiency ◽  
Rejection Rate ◽  
Contact Angles ◽  
Water Contact ◽  
Water Emulsion ◽  
Emulsion Separation ◽  
Oil Water

Abstract Anti-fouling copper hydroxide nanowires (CHNs)-graphene oxide (GO) nanocomposites membrane was fabricated by a vacuum-assisted filtration self-assembly process. CHNs were covered on the surface and inserted into the interlayers of the GO nanosheets to form the rough surface and nanostructure channels. The membrane with water contact angles (CAs) of 53° and oil CAs of 155° exhibited superior stability, hydrophilicity, underwater superoleophobicity and ultralow oil adhesion, and hence it could separate the oil-water emulsion with a high efficiency of >99%. This membrane showed the combined advantages of high oil rejection rate and ultralow membrane fouling, making it promising for practical oil-water emulsion separation applications.

Ultra-robust Superhydrophobic/superoleophilic Stainless Mesh Coated by PTFE/SiO2 for Oil/water Separation

MRS Advances ◽  
2018 ◽  
Vol 4 (07) ◽  
pp. 359-367 ◽  
Author(s):  
Chaolang Chen ◽  
Ding Weng ◽  
Awais Mahmood ◽  
Jiadao Wang
Keyword(s):  
Contact Angle ◽  
Self Assembly ◽  
High Efficiency ◽  
Water Contact ◽  
Water Separation ◽  
Low Surface Energy ◽  
Assembly Method ◽  
Potential Applications ◽  
Oil Water Separation ◽  
Oil Water

AbstractIn this study, a superhydrophobic and superoleophilic stainless mesh coated with polytetrafluoroethylene/silicon dioxide (PTFE/SiO2) was fabricated through electrostatic self-assembly method followed by sintering treatment. The PTFE was utilized to construct low-surface-energy surface and the SiO2 nanoparticles were added to enhance its surface roughness. The as-prepared stainless mesh exhibited desirable superhydrophobicity and superoleophilicity with a water contact angle of 152° and oil contact angle of 0°. The coated stainless mesh could separate a variety of oil/water mixtures with high efficiency and it also exhibited good recyclability. Moreover, the corrosion-resistance of stainless mesh was greatly improved by coating it with PTFE. The thermogravimetric analysis (TGA) measurements showed that the coated mesh could withstand high temperature of up to 430°C, indicating excellent thermal-resistance. It is believed that this ultra-robust stainless mesh would have significant potential applications in industry.

Eco-friendly fabrication of sponge-like magnetically carbonaceous fiber aerogel for high-efficiency oil–water separation

RSC Advances ◽  
2016 ◽  
Vol 6 (36) ◽  
pp. 30301-30310 ◽  
Author(s):  
Rui-Lin Liu ◽  
Xing-Qiang Li ◽  
Hui-Qin Liu ◽  
Zhi-Min Luo ◽  
Jin Ma ◽  
...  
Keyword(s):  
Chemical Modification ◽  
High Efficiency ◽  
Water Separation ◽  
Oil Water Separation ◽  
Oil Water ◽  
Carbonaceous Fiber ◽  
First Time

A magnetically carbonaceous fiber aerogel was for the first time fabricated by a facile approach from natural cotton and can be used as potential adsorbent without any further chemical modification for high-efficiency oil–water separation.

Carbon Dots-Cluster-DOX Nanocomposites Fabricated by a Co-Self-Assembly Strategy for Tumor-Targeted Bioimaging and Therapy

2018 ◽  
Vol 35 (9) ◽  
pp. 1800190 ◽  
Author(s):  
Tao Deng ◽  
Rong Zhang ◽  
Jie Wang ◽  
Xiaoxiao Song ◽  
Fangjian Bao ◽  
...  
Keyword(s):  
Self Assembly ◽  
Carbon Dots ◽  
Assembly Strategy

Hollow porous organic nanospheres for anchoring Pd(PPh3)4 through a co-hyper-crosslinking mediated self-assembly strategy

2020 ◽  
Vol 44 (16) ◽  
pp. 6661-6666 ◽  
Author(s):  
Ying Liu ◽  
Li Zhang ◽  
Shengguang Gao ◽  
Buyin Shi ◽  
Haitao Yu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Self Assembly ◽  
Facile Synthesis ◽  
Assembly Strategy ◽  
First Time

A facile synthesis of Pd(PPh3)4-functionalized hollow porous organic nanospheres with excellent catalytic activity is reported for the first time.

An easy preparation of photo-response TiO2@copper wire mesh with quick on/off switchable superwetting for high efficiency oil–water separation

2018 ◽  
Vol 42 (21) ◽  
pp. 17563-17573 ◽  
Author(s):  
Bing Shi ◽  
Xiaohua Jia ◽  
Zhiguang Guo
Keyword(s):  
Titanium Dioxide ◽  
Hydrothermal Method ◽  
High Efficiency ◽  
Copper Wire ◽  
Wire Mesh ◽  
Water Separation ◽  
Oil Water Separation ◽  
Photo Response ◽  
Oil Water

A photo-response superwetting was easily fabricated using a hydrothermal method and titanium dioxide (TiO2) on a copper wire mesh (CWM).

Single Amino Acid Based Self-Assemblies of Cysteine and Methionine

2018 ◽  
Author(s):  
Nidhi Gour ◽  
Bharti Koshti ◽  
Chandra Kanth P. ◽  
Dhruvi Shah ◽  
Vivek Shinh Kshatriya ◽  
...  
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Self Assembly ◽  
Aromatic Amino Acids ◽  
Neutral Condition ◽  
Single Amino Acid ◽  
Binding Assays ◽  
Human Neuroblastoma ◽  
Cytotoxicity Assays ◽  
First Time

We report for the very first time self-assembly of Cysteine and Methionine to discrenible strucutres under neutral condition. To get insights into the structure formation, thioflavin T and Congo red binding assays were done which revealed that aggregates may not have amyloid like characteristics. The nature of interactions which lead to such self-assemblies was purported by coincubating assemblies in urea and mercaptoethanol. Further interaction of aggregates with short amyloidogenic dipeptide diphenylalanine (FF) was assessed. While cysteine aggregates completely disrupted FF fibres, methionine albeit triggered fibrillation. The cytotoxicity assays of cysteine and methionine structures were performed on Human Neuroblastoma IMR-32 cells which suggested that aggregates are not cytotoxic in nature and thus, may not have amyloid like etiology. The results presented in the manuscript are striking, since to the best of our knowledge,this is the first report which demonstrates that even non-aromatic amino acids (cysteine and methionine) can undergo spontaneous self-assembly to form ordered aggregates.

Probing the Dynamic Self-Assembly Behaviour of Photoswitchable Wormlike Micelles in Real Time

2018 ◽  
Author(s):  
Elaine A. Kelly ◽  
Judith E. Houston ◽  
Rachel Evans
Keyword(s):  
Real Time ◽  
Absorption Spectroscopy ◽  
Self Assembly ◽  
Uv Light ◽  
Wormlike Micelles ◽  
Tetraethylene Glycol ◽  
Light Illumination ◽  
First Time ◽  
Dependent Processes

Understanding the dynamic self-assembly behaviour of azobenzene photosurfactants (AzoPS) is crucial to advance their use in controlled release applications such as<i></i>drug delivery and micellar catalysis. Currently, their behaviour in the equilibrium <i>cis-</i>and <i>trans</i>-photostationary states is more widely understood than during the photoisomerisation process itself. Here, we investigate the time-dependent self-assembly of the different photoisomers of a model neutral AzoPS, <a>tetraethylene glycol mono(4′,4-octyloxy,octyl-azobenzene) </a>(C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>) using small-angle neutron scattering (SANS). We show that the incorporation of <i>in-situ</i>UV-Vis absorption spectroscopy with SANS allows the scattering profile, and hence micelle shape, to be correlated with the extent of photoisomerisation in real-time. It was observed that C<sub>8</sub>AzoOC<sub>8</sub>E<sub>4</sub>could switch between wormlike micelles (<i>trans</i>native state) and fractal aggregates (under UV light), with changes in the self-assembled structure arising concurrently with changes in the absorption spectrum. Wormlike micelles could be recovered within 60 seconds of blue light illumination. To the best of our knowledge, this is the first time the degree of AzoPS photoisomerisation has been tracked <i>in</i><i>-situ</i>through combined UV-Vis absorption spectroscopy-SANS measurements. This technique could be widely used to gain mechanistic and kinetic insights into light-dependent processes that are reliant on self-assembly.

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