A pH, thermal and light triple-stimuli responsive micellar solution formed by a cationic surfactant and trans-o-hydroxycinnamic acid

Soft Matter ◽  
2021 ◽  
Author(s):  
Dongmei Lv ◽  
Qi Liu ◽  
Huijun Wu ◽  
Yiyao Cheng ◽  
Chenyong Wang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactant ◽  
Micellar Solution ◽  
Hydroxycinnamic Acid ◽  
Light Irradiation ◽  
Stimuli Responsive ◽  
Solution Ph

A multi-stimuli responsive wormlike micellar solution (pH, temperature and light irradiation) was constructed by mixing a cationic surfactant R16HTAB and trans-o-hydroxycinnamic acid OHCA in aqueous solution.

scholarly journals Synthesis and solution behavior of triple stimuli-responsive micellar and hybrid janus nanoparticles

2015 ◽  
Author(s):  
Παναγιώτης Φαληρέας
Keyword(s):  
Aqueous Solution ◽  
Molecular Weight ◽  
Block Copolymers ◽  
Polymer Brushes ◽  
Light Irradiation ◽  
Stimuli Responsive ◽  
Solution Behavior ◽  
Janus Nanoparticles ◽  
Weight Distributions ◽  
Responsive Behavior

Inspired by nature, stimuli-responsive systems were established andextensively developed in the past two to three decades. Among them, ever increasingattention has been paid to the field of responsive polymers due to their adjustablemolecular structure and polymorphism of morphologies. The recent advances inpolymer chemistry gave an impetus to the design of multi-responsive polymericmaterials that recognize independently or synergistically more than one stimulusexhibiting collective responses. Based on this principle, the main goal of this researchis the synthesis and study of the responsive behavior of triple stimuli-responsivehybrid Janus and micellar nanoparticles. The ability of these materials to alter theirphysico-chemical properties in response to multiple changes in their environmentalconditions renders them attractive candidates in a diverse range of applications.Hybrid Janus nanoparticles represent a new class of hybrid materials with aninorganic core and asymmetric grafting of polymer brushes from their surface. Thehigh demand for such particles contradicts their small-scale production methods. Inresponse to that, this work takes advantage of the large surface area provided byspherical polymer latex particles to immobilize silica nanoparticles at the latexsolventinterphase and thus provide shielding to one hemisphere of the colloidal silicananoparticles embedded in the latex particles, whereas the exposed silica surface canbe chemically modified as required. Here, the exposed surface of the silicananoparticles was functionalized with atom transfer radical polymerization (ATRP)initiating sites. These asymmetric functionalized nanoparticles were used for thegrowth of a hydrophobic polymer poly(methyl methacrylate) (PMMA); ahydrophobic polymer, poly(tert-butyl acrylate) (Pt-BA) that can be hydrolyzed toform an anionic and pH-responsive derivative poly(acrylic acid) (PAA); and ahydrophilic, cationic and pH- and temperature-responsive polymer, poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA). For comparison, the fully-coatednanoparticle analogues were also synthesized employing the same polymerizationconditions. The successful grafting of the polymers from the surface of the silicananoparticles was verified by TGA, while high molecular weight polymers of narrowmolecular weight distributions were measured by GPC, verifying the control of thesurface-initiated polymerization reactions. Observation by FESEM provided insight on the topology of the hybrid Janus nanoparticles, suggesting the formation of acornlikenanoparticles. The aqueous solution behavior of the Janus and fully-coatedPDMAEMA and PAA nanoparticles were investigated by DLS, potentiometrictitrations and zeta potential measurements verifying the responsive behavior of thenanoparticles. Additionally, well-defined amphiphilic hybrid Janus nanoparticlescomprising an inorganic silica core and a shell consisting of compartmentalized PAAand PDMAEMA chains were synthesized via a multi-step ATRP surface-initiatedpolymerization process. The successful grafting of the polymer brushes on theopposite hemispheres of the nanoparticles was evidenced by TGA, whereas highmolecular weight and narrow molecular weight distributions were measured for bothpolymers. The ampholytic hybrid Janus nanoparticles exhibited a pH-responsivebehavior in aqueous solution due to the presence of both ionizable, DMAEMA andAA, groups on the nanoparticles‟ surface. DLS studies showed a variation of thehydrodynamic diameter of the polyamholytic hybrid nanoparticles as a function ofsolution pH. At the extreme pH values the size of the nanoparticles reached amaximum, while near the isoelectric point the nanoparticles‟ size collapsed.In the second part of this work, hybrid Janus nanoparticles that respond tochanges of the solution pH and temperature and to light irradiation were synthesized.For their synthesis, DMAEMA and the in-house synthesized monomer, 1',3',3'-trimethyl-6-methacryloyloxy-spiro(2H-1-benzopyran-2,2'-indoline) (SPMA) werecopolymerized from the surface of Janus initiator nanoparticles by surface-initiatedATRP. Two hybrid Janus nanoparticles were synthesized bearing 3 and 15 mole %SPMA, respectively. The pH- thermo- and light-responsive behavior of the SiO2-g-(PDMAEMA-co-PSPMA) hybrid Janus nanoparticles bearing 15 mole % SPMA wasinvestigated in water by UV/Vis and DLS studies, verifying the triple-responsivebehavior of the nanoparticles.Finally, multi-responsive block copolymers were synthesized by the sequentialATRP of DMAEMA followed by the polymerization of the in-house synthesizedmonomer SPMA. Two block copolymers were synthesized bearing 3 and 14 mole %SPMA, respectively. The PDMAEMA-b-PSPMA block copolymers can selfassembleinto well-defined spherical micelles, comprising a hydrophobic PSPMAcore and a hydrophilic PDMAEMA shell, in aqueous solution. The responsivebehavior of the micelles when applying three different stimuli (i.e. light, pH and temperature) was verified, while their capability to encapsulate a model compoundand release it in response to UV light irradiation was also investigated.

Immobilization of ZnO Suspension on Glass Substrate to Remove Filtration During the Removal of Remazol Red R from Aqueous Solution

2016 ◽  
Vol 12 (6) ◽  
pp. 4127-4133
Author(s):  
Nazmul Kayes ◽  
Jalil Miah ◽  
Md. Obaidullah ◽  
Akter Hossain ◽  
Mufazzal Hossain
Keyword(s):  
Aqueous Solution ◽  
Glass Substrate ◽  
Uv Light ◽  
Aqueous Suspension ◽  
Light Irradiation ◽  
Zno Films ◽  
Light Sources ◽  
Zno Film ◽  
Semiconductor Oxides ◽  
Remazol Red

Photodegradation of textile dyes in the presence of an aqueous suspension of semiconductor oxides has been of growing interest. Although this method of destruction of dyes is efficient, the main obstacle of applying this technique in the industry is the time and cost involving separation of oxides from an aqueous suspension. In this research, an attempted was made to develop ZnO films on a glass substrate by simple immobilization method for the adsorption and photodegradation of a typical dye, Remazol Red R (RRR) from aqueous solution. Adsorption and photodegradation of  RRR were performed in the presence of glass supported ZnO film. Photodegradation of the dye was carried out by varying different parameters such as the catalyst dosage, initial concentrations of RRR, and light sources. The percentage of adsorption as well as photodegradation increased with the amount of ZnO, reaches a maximum and then decreased. Maximum degradation has been found under solar light irradiation as compared to UV-light irradiation. Removal efficiency was also found to be influenced by the pre-sonication of ZnO suspension.

Heterogeneous Fenton Catalytic Removal of Organic Pollutant in Aqueous Solution by using Coal Gangue as a Catalyst

2019 ◽  
Vol 12 (4) ◽  
pp. 312-325
Author(s):  
Jiwei Zhang ◽  
Jingjing Xu ◽  
Shuaixia Liu ◽  
Baoxiang Gu ◽  
Feng Chen ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Hydroxyl Radical ◽  
Removal Rate ◽  
Organic Pollutant ◽  
Coal Gangue ◽  
Ion Leakage ◽  
Heterogeneous Fenton ◽  
Solution Ph ◽  
X Ray

Background: Coal gangue was used as a catalyst in heterogeneous Fenton process for the degradation of azo dye and phenol. The influencing factors, such as solution pH gangue concentration and hydrogen peroxide dosage were investigated, and the reaction mechanism between coal gangue and hydrogen peroxide was also discussed. Methods: Experimental results showed that coal gangue has the ability to activate hydrogen peroxide to degrade environmental pollutants in aqueous solution. Under optimal conditions, after 60 minutes of treatment, more than 90.57% of reactive red dye was removed, and the removal efficiency of Chemical Oxygen Demand (COD) up to 72.83%. Results: Both hydroxyl radical and superoxide radical anion participated in the degradation of organic pollutant but hydroxyl radical predominated. Stability tests for coal gangue were also carried out via the continuous degradation experiment and ion leakage analysis. After five times continuous degradation, dye removal rate decreased slightly and the leached Fe was still at very low level (2.24-3.02 mg L-1). The results of Scanning Electron Microscope (SEM), energy dispersive X-Ray Spectrometer (EDS) and X-Ray Powder Diffraction (XRD) indicated that coal gangue catalyst is stable after five times continuous reuse. Conclusion: The progress in this research suggested that coal gangue is a potential nature catalyst for the efficient degradation of organic pollutant in water and wastewater via the Fenton reaction.

Stimuli-Responsive Supramolecular Chirality Switching and Nanoassembly Constructed by n-Shaped Amphiphilic Molecules in Aqueous Solution

Langmuir ◽  
2021 ◽  
Vol 37 (3) ◽  
pp. 1215-1224
Author(s):  
Yuntian Yang ◽  
Qingqing Han ◽  
Yi-rong Pei ◽  
Shengsheng Yu ◽  
Zhegang Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Stimuli Responsive ◽  
Supramolecular Chirality ◽  
Amphiphilic Molecules

scholarly journals Synthesis and pH-stimuli responsive research of gemini amine-oxide surfactants containing amides

RSC Advances ◽  
2020 ◽  
Vol 10 (72) ◽  
pp. 44387-44396
Author(s):  
Hanyu Chen ◽  
Duojiao Fu ◽  
Xiqin Zhou ◽  
Hongqin Liu ◽  
Baocai Xu
Keyword(s):  
Aqueous Solution ◽  
Amine Oxide ◽  
Stimuli Responsive ◽  
Responsive Behavior

The series of gemini amine-oxide surfactants with the formula CnH2n+1CONH(CH2)2N+O–(CH3)–(CH2)3–(CH3)N+O– (CH2)2NHCOCnH2n+1 (n = 11, 13, 15, and 17) have been synthesized, and their pH-stimuli responsive behavior in aqueous solution has been studied.

Aggregation Behavior of a Tetrameric Cationic Surfactant in Aqueous Solution

Langmuir ◽  
2010 ◽  
Vol 26 (1) ◽  
pp. 28-33 ◽  
Author(s):  
Yanbo Hou ◽  
Yuchun Han ◽  
Manli Deng ◽  
Junfen Xiang ◽  
Yilin Wang
Keyword(s):  
Aqueous Solution ◽  
Cationic Surfactant ◽  
Aggregation Behavior

scholarly journals Exfoliation of graphite into graphene in aqueous solution: an application as graphene/TiO2 nanocomposite to improve visible light photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (95) ◽  
pp. 93048-93055 ◽  
Author(s):  
R. Giovannetti ◽  
E. Rommozzi ◽  
M. Zannotti ◽  
C. A. D'Amato ◽  
S. Ferraro ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Activity ◽  
Liquid Phase ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Visible Light Photocatalytic Activity ◽  
Positive Effects ◽  
Graphene Dispersion ◽  
Visible Light Photocatalytic

Graphene dispersion (GR) was prepared by liquid-phase sonication of graphite and evaluated by XRD, DLS and UV-Vis analysis. It was used to prepare PP@mgGR–TiO2, showing positive effects on ARS photodegradation under visible light irradiation.

scholarly journals Crystal structure of the new hybrid material bis(1,4-diazoniabicyclo[2.2.2]octane) di-μ-chlorido-bis[tetrachloridobismuthate(III)] dihydrate

2015 ◽  
Vol 71 (11) ◽  
pp. 1384-1387
Author(s):  
Marwen Chouri ◽  
Habib Boughzala
Keyword(s):  
Crystal Structure ◽  
Aqueous Solution ◽  
Hydrogen Bonds ◽  
Room Temperature ◽  
Molar Ratio ◽  
Water Molecules ◽  
Site Symmetry ◽  
Two Dimensional ◽  
Slow Evaporation ◽  
Solution Ph

The title compound bis(1,4-diazoniabicyclo[2.2.2]octane) di-μ-chlorido-bis[tetrachloridobismuthate(III)] dihydrate, (C6H14N2)2[Bi2Cl10]·2H2O, was obtained by slow evaporation at room temperature of a hydrochloric aqueous solution (pH = 1) containing bismuth(III) nitrate and 1,4-diazabicyclo[2.2.2]octane (DABCO) in a 1:2 molar ratio. The structure displays a two-dimensional arrangement parallel to (100) of isolated [Bi2Cl10]4−bioctahedra (site symmetry -1) separated by layers of organic 1,4-diazoniabicyclo[2.2.2]octane dications [(DABCOH2)2+] and water molecules. O—H...Cl, N—H...O and N—H...Cl hydrogen bonds lead to additional cohesion of the structure.

Removal of Cr(VI) from Aqueous Solution by Acid Treated Fungal Biomass

2011 ◽  
Vol 197-198 ◽  
pp. 131-135
Author(s):  
Li Fang Zhang ◽  
Ying Ying Chen ◽  
Wen Jie Zhang
Keyword(s):  
Aqueous Solution ◽  
Fungal Biomass ◽  
Adsorption Model ◽  
Solution Ph ◽  
Initial Concentration ◽  
Biosorption Capacity ◽  
Penicillium Sp ◽  
Chromium Vi ◽  
Equilibrium Data ◽  
Biosorption Equilibrium

Biosorption of chromium (VI) ions from aqueous solution with fungal biomass Penicillium sp. was investigated in the batch system. The influence of contact time, solution pH, biosorbent concentration, initial concentration of Cr (VI) ions and temperature on biosorption capacity of Cr (VI) ions was studied. The uptake of Cr (VI) was highly pH dependent and the optimum pH for biosorption of Cr (VI) ions was found to be 2.0. Biosorption capacity of Cr (VI) ions decreased with increased biosorbent concentration and increased with increase in initial concentration of Cr (VI) ions. The experiment results also showed that high temperatures increased the biosorption capacity of Cr (VI) by fungal biomass. It was found that the biosorption equilibrium data were fitted very well to the kangmuir as well as to the Freundlich adsorption model. The maximum sorptive capacities obtained from the Langmuir equation at temperature of 20, 30 and 40°C were 25.91, 32.68 and 35.97 mg/g for Cr (VI) ions, respectively. The results of this study indicated that the fungal biomass of Penicillium sp. is a promising biosorbent for removal of chromium (VI) ions from the water.

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