Preparation of cationic poly(ionic liquids) functionalization of silica nanoparticles via multicomponent condensation reaction with significant enhancement of adsorption capacity

2020 ◽  
Vol 300 ◽  
pp. 112267 ◽  
Author(s):  
Guang Yang ◽  
Qiang Huang ◽  
Hongye Huang ◽  
Junyu Chen ◽  
Yuan Lei ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Silica Nanoparticles ◽  
Adsorption Capacity ◽  
Condensation Reaction ◽  
Significant Enhancement ◽  
Multicomponent Condensation

Influence of intramolecular interactions on carbon dioxide gas adsorption capacity in Mesoporous Imine polymers

2018 ◽  
Author(s):  
Jaya Prakash Madda ◽  
Pilli Govindaiah ◽  
Sushant Kumar Jena ◽  
Sabbhavat Krishna ◽  
Rupak Kishor
Keyword(s):  
Carbon Dioxide ◽  
Adsorption Capacity ◽  
Density Functional ◽  
Gas Adsorption ◽  
Ambient Pressure ◽  
Condensation Reaction ◽  
Intramolecular Interactions ◽  
Carbon Dioxide Adsorption ◽  
Nitrogen Gas ◽  
Adsorption Characteristic

<p>Covalent organic Imine polymers with intrinsic meso-porosity were synthesized by condensation reaction between 4,4-diamino diphenyl methane and (para/meta/ortho)-phthaladehyde. Even though these polymers were synthesized from precursors of bis-bis covalent link mode, the bulk materials were micrometer size particles with intrinsic mesoporous enables nitrogen as well as carbon dioxide adsorption in the void spaces. These polymers were showed stability up to 260<sup>o</sup> centigrade. Nitrogen gas adsorption capacity up to 250 cc/g in the ambient pressure was observed with type III adsorption characteristic nature. Carbon dioxide adsorption experiments reveal the possible terminal amine functional group to carbamate with CO<sub>2</sub> gas molecule to the polymers. One of the imine polymers, COP-3 showed more carbon dioxide sorption capacity and isosteric heat of adsorption (Q<sub>st</sub>) than COP-1 and COP-2 at 273 K even though COP-3 had lower porosity for nitrogen gas than COP-1 and COP-2. We explained the trends in gas adsorption capacities and Qst values as a consequence of the intra molecular interactions confirmed by Density Functional Theory computational experiments on small molecular fragments.</p>

Effect of L-Arginine on the Carbon Microsphere Forming under Hydrothermal Carbonization

2019 ◽  
Vol 41 (1) ◽  
pp. 72-72
Author(s):  
Jilei Liang Jilei Liang ◽  
Mengmeng Wu Mengmeng Wu ◽  
Hongmei Cai Hongmei Cai ◽  
Hao Wang Hao Wang ◽  
Hua Huang Hua Huang ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Adsorption Capacity ◽  
Surface Property ◽  
Condensation Reaction ◽  
Hydrothermal Carbonization ◽  
Carbon Microspheres ◽  
N2 Adsorption ◽  
Sem Images ◽  
Ft Ir ◽  
Adsorption Desorption

Carbon microspheres (CMs) with a diameter of 5-10 μm have been synthesized by hydrothermal carbonization of starch and L-arginine. The surface property and structure of CMs were examined by FT-IR spectra, N2 adsorption-desorption isotherms and SEM images. These characterizations indicated that the L-arginine does not connect into the CMs but it promotes the starch hydrolysis and polymerization-condensation reaction of intermediate, which accelerates the formation of CMs and improves the yield in shorter time. The surface property of CMs determines adsorption capacity for acetic acid. By contrast, the porosity resulted from the carbonization at 500 and#176;C dominates the adsorption capacity for acetic acid.

Rheological and Ionic Transport Properties of Nanocomposite Electrolytes Based on Protic Ionic Liquids and Silica Nanoparticles

Langmuir ◽  
2019 ◽  
Vol 36 (1) ◽  
pp. 148-158 ◽  
Author(s):  
Mayeesha Marium ◽  
Mahfuzul Hoque ◽  
Muhammed Shah Miran ◽  
Morgan L. Thomas ◽  
Izuru Kawamura ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Transport Properties ◽  
Silica Nanoparticles ◽  
Ionic Transport ◽  
Protic Ionic Liquids ◽  
Nanocomposite Electrolytes

scholarly journals Ionic Liquids and Calcium Oxide Grafted with Allylmalonic Acid Applied to Support the Peroxide Crosslinking of an Ethylene–Propylene Copolymer

Materials ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3260
Author(s):  
Magdalena Maciejewska
Keyword(s):  
Ionic Liquids ◽  
Silica Nanoparticles ◽  
Calcium Oxide ◽  
Crosslink Density ◽  
Ethylene Propylene ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
And Performance ◽  
Crosslinking Reactions ◽  
Thermal Stability Of

Nanosized calcium oxide (CaO) featuring a surface grafted with allylmalonic acid (ALA) was used to increase the efficiency of the peroxide crosslinking of an ethylene–propylene copolymer (EPM) filled with silica nanoparticles. In this study, 1-butyl-3-methylimidazolium ionic liquids (ILs) with different anions were applied to improve the dispersion of CaO/ALA and silica nanoparticles in the EPM copolymer, as well as to catalyze the interfacial crosslinking reactions. In this article, we discuss the effects of CaO/ALA and ILs on the curing characteristics, vulcanization temperature, crosslink density, mechanical properties, and thermal stability of EPM, as well as the resistance of EPM to weather aging. The CaO/ALA with ILs reduced the vulcanization time of the rubber compounds without a significant effect on the vulcanization temperature. Their application resulted in an increased vulcanizate crosslink density, as well as improved tensile strength compared to the pure peroxide system. The influence of 1-butyl-3-methylimidazolium ILs on EPM vulcanization and performance depends on the anion present in the molecules of the ionic liquid. The most active IL seems to be that with the tetrafluoroborate anion.

Using the Ugi multicomponent condensation reaction to prepare families of chromophore appended azamacrocycles and their complexes

2008 ◽  
pp. 5212 ◽  
Author(s):  
Marcus Main ◽  
John S. Snaith ◽  
Marco M. Meloni ◽  
Maite Jauregui ◽  
Daniel Sykes ◽  
...  
Keyword(s):  
Condensation Reaction ◽  
Multicomponent Condensation

Organic-Hybrid Silica Nanoparticles as Adsorbent for Pb (II) Ion

2012 ◽  
Vol 465 ◽  
pp. 146-149 ◽  
Author(s):  
Wei Li ◽  
Yang Zhou ◽  
Wen Hui Ma ◽  
Shi Xing Wang ◽  
Yong Nian Dai
Keyword(s):  
Silica Nanoparticles ◽  
Adsorption Capacity ◽  
Lead Ion ◽  
Maximum Adsorption Capacity ◽  
Modified Silica ◽  
Naphthalic Anhydride ◽  
Initial Concentration ◽  
Organic Hybrid ◽  
Hybrid Silica ◽  
Modified Silica Nanoparticles

4-Bromo-1, 8-naphthalic anhydride and N, N-Dimethylethylenediamine covalently modified silica nanoparticles were synthesized. It can be utilized as an adsorbent for Pb (II), showing excellent adsorption capacity. According to the Langmiur fitting, the maximum adsorption capacity for lead ion is up to 293.26 mg/g. And the adsorption percentage is greater than 90 % when the initial concentration is lower than 100 mg/l.

scholarly journals Molecular sieve supported ionic liquids as efficient adsorbent for CO2 capture

2015 ◽  
Vol 80 (2) ◽  
pp. 265-275 ◽  
Author(s):  
Na Yang ◽  
Rui Wang
Keyword(s):  
Ionic Liquids ◽  
Adsorption Capacity ◽  
Molecular Sieves ◽  
Co2 Adsorption ◽  
Ft Ir ◽  
Loading Amount ◽  
Vacuum Heating ◽  
Co2 Adsorption Capacity ◽  
Supported Ionic Liquids

[NH3e-mim][BF4], [OHe-mim][BF4] and [HOEAm] were selected and supported onto molecular sieves NaY, USY, SAPO-34 and MCM-41, to prepare supported ionic liquids. It was found that [NH3e-mim][BF4]/NaY has excellent CO2 adsorption performance, with adsorption capacity of 0.108 mmolCO2/g. This paper investigates the optimal adsorption conditions and recyclability of [NH3e-mim][BF4]/NaY. The results show that [NH3e-mim][BF4]/NaY has good CO2 adsorption under the condition of 20?C and 20% ILs loading amount. By vacuum heating, CO2 adsorption capacity reaches 0.451mmolCO2/g at fifth runs and reduces to 0.29mmolCO2/g at tenth runs. The structure and characterization of the [NH3e-mim][BF4]/NaY was examined by FT-IR, XRD, SEM and TG-DSC. TG-DSC also shows that it has good thermostability below 50?C.

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