Chemical surface coating of MWCNTs with riboflavin and its application for the production of poly(ester-imide)/MWCNTs composites containing 4,4′-thiobis(2-tert-butyl-5-methylphenol) linkages: Thermal and morphological properties

2015 ◽  
Vol 133 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Shadpour Mallakpour ◽  
Samaneh Soltanian
Keyword(s):  
Surface Coating ◽  
Morphological Properties ◽  
Chemical Surface ◽  
Tert Butyl

scholarly journals Tert-butyl catechol/alkaline-treated kenaf/jute polyethylene hybrid composites: impact on physico-mechanical, thermal and morphological properties

2018 ◽  
Vol 76 (2) ◽  
pp. 763-784 ◽  
Author(s):  
Md Rezaur Rahman ◽  
Sinin Hamdan ◽  
Elammaran Jayamani ◽  
Akshay Kakar ◽  
Muhammad Khusairy Bin Bakri ◽  
...  
Keyword(s):  
Hybrid Composites ◽  
Morphological Properties ◽  
Tert Butyl

Response surface methodological optimization of batch Cu(II) sorption onto succinic acid functionalized SiO2 nanoparticles

2019 ◽  
Vol 97 (4) ◽  
pp. 277-286 ◽  
Author(s):  
Amr A. Yakout ◽  
Medhat A. Shaker ◽  
Khalid Z. Elwakeel ◽  
Wael Alshitari
Keyword(s):  
Succinic Acid ◽  
Response Surface ◽  
Aqueous Media ◽  
Sio2 Nanoparticles ◽  
Morphological Properties ◽  
Order Kinetic ◽  
Chemical Surface ◽  
Sorption System ◽  
Maximum Sorption ◽  
Using Data

Functionalizing nanosilica (n-SiO2) particles with suitable active organic moiety leads to the formation of surfaces with precisely controlled physical and chemical characteristics. In this work, a novel nanosorbent (31 ± 2.4 nm), namely succinic acid functionalized nanosilica (n-SiO2@SA), was synthesized via a simple protocol using microwave irradiation to remove Cu(II) ions from aqueous media. The successful functionalization of n-SiO2 was confirmed by FTIR, and the thermal stability of n-SiO2@SA was investigated by TGA study. Other techniques, including HRTEM, DLS and zeta-potential, were utilized to investigate the chemical, surface, and morphological properties of the fabricated n-SiO2@SA. The response surface methodology (RSM) combined with three-level, three-factorial Box–Behnken design (BBD) was applied to optimize the multivariable sorption system using data obtained from 17 batch runs to reach 98.9% of Cu(II) ion removal. The predicted optimal conditions were as follows: contact time = 30 min, pH = 7.1, initial Cu(II) concentration = 317.5 mg L−1, and sorbent dose = 15 mg at which the maximum sorption capacities for n-SiO2 and n-SiO2@SA were 209.3 and 386.4 mg g−1, respectively, at 25 °C, thus supporting the validity of functionalization process. Non-linear regression and linear least-squares methods confirm the suitability of Langmuir model to describe the experimental endothermic, feasible, and chemisorption data, whereas the normalized standard deviation Δq% recommends the pseudo second-order kinetic model to represent the kinetic data. Real Cu-contaminated wastewaters were used to examine n-SiO2@SA nanosorbent for removing Cu(II) ions.

scholarly journals Enhancement of nonwoven cellulose triacetate forward-osmosis membranes by surface coating modification

2017 ◽  
Vol 6 (4) ◽  
pp. 124
Author(s):  
Hanaa Aly ◽  
Hanaa Gadallah ◽  
Sahar Ali ◽  
Rania Sabry
Keyword(s):  
Surface Coating ◽  
High Performance ◽  
Forward Osmosis ◽  
Cellulose Triacetate ◽  
Structure Characterization ◽  
Dense Layer ◽  
Coating Materials ◽  
Chemical Surface ◽  
Membrane Performance ◽  
High Efficient

Forward osmosis (FO) is considered as one of the emerging techniques in membrane technology. The enhancement of FO performance is governed by two major factors: the first one is development of high-performance draw solutions and the second is utilizing of high efficient FO membranes. The aim of this work is to investigate chemical surface coating modification of commercial nonwoven forward osmosis membrane with new hydrophilic coating materials namely, o-phenylene di-amine and benzoyl chloride. The effect of coating addition at different concentrations was studied. The membrane morphology and chemical structure characterization of modified membranes proved the formation of dense layer and higher membrane porosity. Finally, it was demonstrated that increasing of coating material concentration gradually increases porosity and membrane performance till 0.75 g/l. By further increasing of coating materials, the porosity and membrane performance tend to decrease.

Reactive Imprint Lithography: Combined Topographical Patterning and Chemical Surface Functionalization of Polystyrene-block-poly(tert-butyl acrylate) Films

2010 ◽  
Vol 20 (3) ◽  
pp. 460-468 ◽  
Author(s):  
Joost Duvigneau ◽  
Stijn Cornelissen ◽  
Núria Bardají Valls ◽  
Holger Schönherr ◽  
G. Julius Vancso
Keyword(s):  
Surface Functionalization ◽  
Butyl Acrylate ◽  
Imprint Lithography ◽  
Chemical Surface ◽  
Tert Butyl

Deposition of a Titania Coating on Silica by Means of the Chemical Surface Coating†

Langmuir ◽  
1999 ◽  
Vol 15 (18) ◽  
pp. 5807-5813 ◽  
Author(s):  
K. Schrijnemakers ◽  
N. R. E. N. Impens ◽  
E. F. Vansant
Keyword(s):  
Surface Coating ◽  
Chemical Surface ◽  
Titania Coating

Synthesis of a polysilazane layer on silica gel by chemical surface coating

1996 ◽  
Vol 92 (21) ◽  
pp. 4285 ◽  
Author(s):  
Nathalie R. E. N. Impens ◽  
Karl Possemiers ◽  
Etienne F. Vansant
Keyword(s):  
Silica Gel ◽  
Surface Coating ◽  
Chemical Surface
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