Room-temperature fabrication of superhydrophobic covalent organic frameworks (COFs) decorated cotton fabric for high-flux water-in-oil emulsions separation

2021 ◽  
Author(s):  
Li Chen ◽  
Cailong Zhou ◽  
Hao Yang ◽  
Jia Lin ◽  
Yu Ge ◽  
...  
Keyword(s):  
Cotton Fabric ◽  
Room Temperature ◽  
High Flux ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Step Method ◽  
Coated Fabric ◽  
One Step ◽  
Oil Emulsions ◽  
Coated Cotton

We report the preparation of a two-dimensional superhydrophobic covalent organic frameworks (COFs) coated cotton fabric by a rapid one-step method under room temperature. This COFs coated fabric was found to...

scholarly journals An Oligoimide Particle as a Pickering Emulsion Stabilizer

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1071 ◽  
Author(s):  
Yu-Jin Cho ◽  
Dong-Min Kim ◽  
In-Ho Song ◽  
Ju-Young Choi ◽  
Seung-Won Jin ◽  
...  
Keyword(s):  
Particle Concentration ◽  
Pickering Emulsion ◽  
Pickering Emulsions ◽  
Step Method ◽  
Wetting Properties ◽  
Emulsion Droplets ◽  
Step Procedure ◽  
Oil In Water ◽  
One Step ◽  
Oil Emulsions

A pyromellitic dianhydride (PMDA) and 4,4′-oxydianiline (ODA)-based oligoimide (PMDA-ODA) was synthesized by a one-step procedure using water as a solvent. The PMDA-ODA particles showed excellent partial wetting properties and were stably dispersed in both water and oil phases. A stable dispersion was not obtained with comparison PMDA-ODA particles that were synthesized by a conventional two-step method using an organic solvent. Both oil-in-water and water-in-oil Pickering emulsions were prepared using the oligoimide particles synthesized in water, and the size of the emulsion droplet was controlled based on the oligoimide particle concentration. The oligoimide particles were tested to prepare Pickering emulsions using various kinds of oils. The oil-in-water Pickering emulsions were successfully applied to prepare microcapsules of the emulsion droplets. Our new Pickering emulsion stabilizer has the advantages of easy synthesis, no need for surface modification, and the capability of stabilizing both oil-in-water and water-in-oil emulsions.

scholarly journals Transformation Between 2D and 3D Covalent Organic Frameworks via Reversible [2+2] Cycloaddition

2020 ◽  
Author(s):  
Thaksen Jadhav ◽  
Yuan Fang ◽  
Cheng-Hao Liu ◽  
Afshin Dadvand ◽  
Ehsan Hamzehpoor ◽  
...  
Keyword(s):  
Band Structure ◽  
Absorption Edge ◽  
Room Temperature ◽  
Three Dimensional ◽  
Cross Linking ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Doping Behavior ◽  
2D Polymers ◽  
2D And 3D

We report the first transformation between crystalline vinylene-linked two-dimensional (2D) polymers and crystalline cyclobutane-linked three-dimensional (3D) polymers. Specifically, absorption-edge irradiation of the 2D poly(arylenevinylene) covalent organic frameworks (COFs) results in topological [2+2] cycloaddition cross-linking the π-stacked layers in 3D COFs. The reaction is reversible and heating to 200°C leads to a cycloreversion while retaining the COF crystallinity. The resulting difference in connectivity is manifested in the change of mechanical and electronic properties, including exfoliation, blue-shifted UV-Vis absorption, altered luminescence, modified band structure and different acid-doping behavior. The Li-impregnated 2D and 3D COFs show a significant ion conductivity of 1.8×10<sup>−4</sup> S/cm and 3.5×10<sup>−5</sup> S/cm, respectively. Even higher room temperature proton conductivity of 1.7×10<sup>-2</sup> S/cm and 2.2×10<sup>-3</sup> S/cm was found for H<sub>2</sub>SO<sub>4</sub>-treated 2D and 3D COFs, respectively.

Ultra-facile aqueous synthesis of nanoporous zeolitic imidazolate framework membranes for hydrogen purification and olefin/paraffin separation

2019 ◽  
Vol 7 (18) ◽  
pp. 10898-10904 ◽  
Author(s):  
Xu Jiang ◽  
Songwei Li ◽  
Yongping Bai ◽  
Lu Shao
Keyword(s):  
Aqueous Solution ◽  
Gas Separation ◽  
Molecular Sieve ◽  
Room Temperature ◽  
Hydrogen Purification ◽  
Step Method ◽  
Zeolitic Imidazolate Framework ◽  
Aqueous Synthesis ◽  
One Step

An ultra-facile one-step method is discovered to synthesize defect-free ZIF-8 molecular sieve membranes in aqueous solution at room temperature for exceptional gas separation.

Synthesis of the Carboxyl and Pyridine Functional Ionic Liquids

2014 ◽  
Vol 513-517 ◽  
pp. 246-250 ◽  
Author(s):  
Ying Xiong ◽  
Min Yang
Keyword(s):  
Ionic Liquids ◽  
Reaction Time ◽  
Anion Exchange ◽  
Room Temperature ◽  
Exchange Resin ◽  
Anion Exchange Resin ◽  
Maximum Yield ◽  
Step Method ◽  
Strong Base ◽  
One Step

The effects of different solvents on synthesis of base functional ionic liquid, butyl pyridinium hydroxide ([bPy]OH), from butyl pyridinium bromine ([bPy]Br) were investigated systematically using KOH/NaOH as the base agent and strong base anion exchange resin. The results showed that the yield of [bPy]OH achieved 35% with the molar ratio of 1:1.1 ([bPy]Br to NaOH) using dichloromethane under room temperature. With isopropanol and 8 h of the reaction time, the yield could reach 88% with byproducts. The yield of 97% without byproduct was achieved by using strong base anion exchange resin in column chromatography static reaction for 0.25 h. The yield of carboxyl and pyridine functional ionic liquids based on neutralization method, exchange method and one-step method were compared and the results showed that the one-step method possessed the maximum yield of 88% with 3 h of the reaction time at room temperature.

A facile one step route to synthesize WO3 nanoplatelets for CO oxidation and photodegradation of RhB: microstructural, optical and electrical studies

RSC Advances ◽  
2016 ◽  
Vol 6 (73) ◽  
pp. 69615-69626 ◽  
Author(s):  
N. Dirany ◽  
M. Arab ◽  
V. Madigou ◽  
Ch. Leroux ◽  
J. R. Gavarri
Keyword(s):  
Co Oxidation ◽  
Room Temperature ◽  
Organic Pollutant ◽  
Two Dimensional ◽  
Catalytic Activities ◽  
Electrical Studies ◽  
Co Conversion ◽  
One Step

Two-dimensional nanoplatelets of WO3 were synthesized at room temperature. The large exposed (020) facets of the nanoplatelets show a high catalytic activities, for CO conversion and for photodegradation of organic pollutant.

Two-Dimensional Hexagonally Ordered Mesoporous Carbon Synthesized Via a One-Step Method for Supercapacitors

2019 ◽  
Vol 28 (17) ◽  
pp. 103-107
Author(s):  
Tianxiang Zhou ◽  
Fengping Jiang ◽  
Nannan Xia ◽  
Jingxing Chen ◽  
Dingsheng Yuan
Keyword(s):  
Mesoporous Carbon ◽  
Ordered Mesoporous Carbon ◽  
Two Dimensional ◽  
Step Method ◽  
Ordered Mesoporous ◽  
One Step ◽  
Hexagonally Ordered

scholarly journals PEDOT:PSS/PDMS-Coated Cotton Fabric for Strain and Moisture Sensors

Proceedings ◽  
2021 ◽  
Vol 68 (1) ◽  
pp. 1
Author(s):  
Granch Berhe Tseghai ◽  
Benny Malengier ◽  
Kinde Anlay Fante ◽  
Lieva Van Langenhove
Keyword(s):  
Cotton Fabric ◽  
Polyethylene Oxide ◽  
Surface Resistance ◽  
Conductive Polymer ◽  
Strain Sensor ◽  
Polystyrene Sulfonate ◽  
Moisture Sensor ◽  
Coated Fabric ◽  
Textile Fabric ◽  
Coated Cotton

In this work, we have successfully developed a flexible, lightweight, and washable strain and moisture sensor textile fabric by printing poly(3,4-ethylenedioxythiophene) polystyrene sulfonate/polydimethylsiloxane-b-polyethylene oxide (PEDOT:PSS/PDMS) conductive polymer composite on knitted cotton fabric. A 60.2 kΩ/sq surface resistance has been obtained at a 30% ratio of PDMS to PEDOT:PSS at 0.012 g/cm2 solid add-on. The coated fabric was washed at 30 °C for 30 min in the presence of a standard detergent. It was observed that there was a 5.3% increase in surface resistance, i.e., 63.4 kΩ/sq. After coating, the fabric could still be stretched up to the infliction elongation of the fabric, i.e., 40%, with a significant change in surface resistance that makes it usable as a strain sensor. In addition, the conductive fabric showed a drop in surface resistance with an increase of the moisture regain up to 150%.

Multifunctional modified cotton fabric by one-step process using eco-friendly phytic acid and 1, 2, 3, 4-butanetetracarboxylic acid

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yinchun Fang ◽  
Xinhua Liu ◽  
Hailong Liu ◽  
Qian Wang
Keyword(s):  
Phytic Acid ◽  
Cotton Fabric ◽  
Flame Retardancy ◽  
Cotton Fiber ◽  
Oxygen Index ◽  
Step Method ◽  
Limiting Oxygen Index ◽  
Content Type ◽  
One Step ◽  
Butanetetracarboxylic Acid

PurposeCotton is one of the most common nature textile fiber that is widely used in clothing, bedding and decorative fields due to its comfort. However, the cellulosic cotton fiber has its own drawbacks. Cotton fiber belongs to flammable material with the limiting oxygen index (LOI) value about 18% that restricts its applications. Cotton fiber is easy to crease during the repeat wearing and laundering process that will influence the wearability. Therefore, it is very important to improve the flame retardancy and anticrease performance of cotton fabric.Design/methodology/approachIn this study, flame retardant and anticrease multifunctional modifications of cotton fabric were conducted by one-step pad–dry–cure process using eco-friendly phytic acid and 1, 2, 3, 4-butanetetracarboxylic acid.FindingsThe results of limited oxygen index (LOI) values and vertical burning test indicate that the flame retardancy of modified cotton fabric was greatly improved. The LOI value of modified cotton fabric reached 30.8% when the usage of phytic acid was 12%. The crease recovery angle was over 250° of the modified cotton fabric revealing good anticrease performance.Originality/valueThis research provides a novel feasible cost-effective one-step method for the multifunctional modified cellulosic fiber using eco-friendly chemical agents.

Effect of Silver Colloid on Chemical and Physical Properties of Cotton Fabric for the Application of Antimicrobial Textiles

2012 ◽  
Vol 576 ◽  
pp. 272-275 ◽  
Author(s):  
Rabia Almas Arain ◽  
Zeeshan Khatri ◽  
Muhammad Hanif Memon
Keyword(s):  
Antimicrobial Activity ◽  
Physical Properties ◽  
Cotton Fabric ◽  
Gram Negative Bacteria ◽  
Silver Colloid ◽  
Step Method ◽  
One Step ◽  
Overall Performance ◽  
Strength And Stiffness ◽  
Recovery Angle

We report an application of silver colloid on cotton textile using a one- step method. Cotton fabric was treated with silver colloid and antimicrobial activity against Staphylococcus Aurous (gram positive) and Escherichia coli (gram negative) bacteria were evaluated. The treated fabric was evaluated in terms of physical properties such as tensile strength and stiffness, wrinkle recovery angle and degree of whiteness was evaluated. The change in chemical structure and morphology were evaluated using FTIR and SEM respectively. The study revealed that the maximum antimicrobial activity was obtained at 2.5 % of silver colloid while the 3 minutes cure of the treated cotton provided a better overall performance in terms of antimicrobial activity and physical properties.

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