Month: December 2022

Bryuzgin, Evgeny published the artcileThe Superhydrophobic State Stability of Coatings Based on Copolymers of Glycidyl Methacrylate and Alkyl Methacrylates on Cotton Fabric Surface, Safety of Dodecyl 2-methylacrylate, the main research area is glycidyl alkyl methacrylate copolymer cotton fabric coating.

We suggest a simple and reproducible strategy for fabricating durable superhydrophobic coatings on the basis of series of functional random copolymers of alkyl methacrylates and glycidyl methacrylate on cotton fabric surface. The procedure consists of the fabric treatment by solutions of copolymers in methylethylketone and following heating at 140°C. The initial contact angles of obtained coatings on fabric surface achieve 165°. The dependence of superhydrophobic properties of coatings based on copolymers of glycidyl methacrylate and alkyl (meth)acrylates (with alkyl radicals C4-C18 in side chains) attached to the cotton fabric surface was studied. The comparative anal. of superhydrophobic state stability of polymer coatings during long-term contacts with aggressive media is presented. We evaluated the contact angles stability as a function of prolonged contact of polymer coatings with water under saturated vapor conditions, organic solvents, and synthetic detergents. Polymeric coatings based on a copolymer of lauryl methacrylate (C12) and glycidyl methacrylate provide better stability of superhydrophobic properties compared with other copolymers of alkyl methacrylates.

Fibers and Polymers published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Safety of Dodecyl 2-methylacrylate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Qian, Jiasheng published the artcileOne-Step Nanoextraction and Ultrafast Microanalysis Based on Nanodroplet Formation in an Evaporating Ternary Liquid Microfilm, SDS of cas: 142-90-5, the main research area is ternary liquid microfilm nanodroplet formation nanoextn microanalysis.

Preconcentration is key for detection from an extremely low concentration solution, but requires separation steps from a large volume of samples using extracting solvents. Here, a simple approach is presented for ultrafast and sensitive microanal. from a tiny volume of aqueous solutions In this approach, liquid-liquid nanoextn. in an evaporating thin liquid film on a spinning substrate is coupled with quant. anal. in one step. The approach is exemplified using a liquid mixture comprising a target compound to be analyzed in water, mixed with extractant oil and co-solvent ethanol. With rapid evaporation of ethanol, nanodroplets of oil form spontaneously in the film. The compounds are highly concentrated by liquid evaporation and meanwhile extracted to nanodroplets. A detection limit of nanomolar to picomolar is demonstrated for fluorescent model compounds in only ≈5μL of solution with the entire process taking ≈10 s. The combination of nanoextn. and IR microscopy also enables simultaneous chem. identification. The dynamics of thin film evaporation are revealed using fast imaging. The principle behind this approach is general, providing a powerful technique for fast and sensitive chem. anal. of a vast library of compounds for environment monitoring, national security, early diagnosis, and many other applications.

Advanced Materials Technologies (Weinheim, Germany) published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, SDS of cas: 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ghasemzadeh, Hossein published the artcileNanomagnetic Organogel Based on Dodecyl Methacrylate for Absorption and Removal of Organic Solvents, Formula: C16H30O2, the main research area is nanomagnetic organogel acrylic polymer absorption removal organic solvent.

A novel nanomagnetic organogel was synthesized by in situ emulsion polymerization-crosslinking method using dodecyl methacrylate (DDMA) and styrene (St) as monomers, divinylbenzene (DVB) as a crosslinking agent, azobisisobutyronitrile (AIBN) as an initiator, and Fe3O4 as a nanomagnetic particle. Modification of the network was carried out by inclusion of the multi-walled carbon nanotubes (MWCNT) into the organogel matrix. The structure of the nanocomposite was characterized using FTIR spectroscopy, SEM, TEM, TGA/DTG, VSM, and BET anal. The effects of various parameters such as the amount of crosslinker, initiator, Fe3O4, and reaction time as well as monomer ratio on the oil absorption of the organogel were studied. The synthesized organogel can absorb about 35.5, 22.1, 29.86, 14.58, 17.6, 15.3, and 13.7 g·g-1 of CHCl3, toluene, CH2Cl2, hexane, crude oil, gasoline, and diesel oil, under the optimized polymerization conditions, resp. The nanocomposite organogels can be easily separated by a magnetic field after absorption of organic solvents.

Chinese Journal of Polymer Science published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Formula: C16H30O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Xu, Qingbo published the artcileFabrication of fluorine-free superhydrophobic cotton fabric using fumed silica and diblock copolymer via mist modification, Synthetic Route of 142-90-5, the main research area is superhydrophobic cotton fabric silica diblock copolymer mist modification.

Immobilizing inorganic particles to improve the roughness or coating with fluorinated agents and polysiloxanes to reduce surface energy is the most popular approach for constructing superhydrophobic cotton fabrics. However, the poor durability, health and environmental concerns, and other serious drawbacks limit the application of superhydrophobic cotton fabrics. In the present work, we describe a simple and facile fabrication strategy to construct robust fluorine-free superhydrophobic surfaces of cotton fabric via a mist technique. The modified cotton fabrics were first immobilized by fumed silica (SiO2) particles to improve the roughness and then covered with a diblock copolymer of poly[(Me methacrylate)-b-(lauryl methacrylate)] (PMMA-b-PLMA), which was synthesized by RAFT polymerization, to reduce the fabric’s surface energy. The mist technol. used ensures that the PMMA-b-PLMA covers the SiO2 particles on the surface of the fabric with a thin coating. Therefore, the SiO2 particles were stably immobilized on the fabric surface without reducing the roughness. As a result, the water contact angle (WCA) values of the prepared cotton fabrics reached reached 156.7°±0.5°. Moreover, even after 1600 abrasion cycles or 80 laundering cycles, the WCA values of the fabric samples were still higher than 150.1°±0.5°. The stable superhydrophobic cotton fabric surfaces are useful for self-cleaning, oil-water separation, and other potential areas.

Progress in Organic Coatings published new progress about Absorption. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Synthetic Route of 142-90-5.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Wu, Shiliang published the artcileThe regulated emissions and PAH emissions of bio-based long-chain ethers in a diesel engine, Application In Synthesis of 539-88-8, the main research area is polycyclic aromatic hydrocarbon emission ether diesel engine.

Catalytic etherification is a new and developing method for the upgradation of pyrolysis bio-oil into high performance bio-based long-chain ethers. In this work, the application of bio-based long-chain ether oxygenated additives in diesel engines have been checked by focusing on their regulated emissions and PAH emissions. Four bio-based long-chain ethers with similar structures, including: Polyoxymethylene di-Me ether, diglyme, dipropylene glycol di-Me ether and tripropylene glycol Me ether have been blended with diesel fuel and tested in a small-duty diesel engine. The results showed that long-chain ethers were beneficial to the reduction of regulated emissions by comparing to pure diesel. Polyoxymethylene di-Me ether and tripropylene glycol Me ether showed best performance among the four tested ethers. Polyoxymethylene di-Me ether could reduce 56% CO, 23% NO and 93% soot emissions, while Tripropylene glycol Me ether could reduce 52% CO, 28% NO and 88% soot emissions. Besides, the particle sizes of soot particles from the blended fuels were also reduced. What’s more, the addition of bio-based long-chain ethers could reduce particulate PAHs emissions by 39% ∼ 67% and reduce gaseous PAHs emissions by 25% ∼ 44%, and the PAHs toxicity was also reduced by 32% ∼ 55%. This work proved that the structure of oxygen atoms evenly distributed in the chain could efficiently suppress the production of soot precursors and eventually reduce the soot emission.

Fuel Processing Technology published new progress about Absorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Application In Synthesis of 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Karthickeyan, V. published the artcileExperimental investigation on combined effect of ignition promoters and ceramic coating fuelled with papaya seed oil methyl ester in DI diesel engine, Computed Properties of 929-77-1, the main research area is papaya seed oil methyl ester DI diesel engine effect.

The present work offered a comprehensive investigation of engine characteristics of diesel engine driven with diesel and papaya seed oil Me ester (POME). The chem. compositions of POME were explored using FTIR and GC-MS anal. 1% of Di-tert-Bu Peroxide (DTBP) and Pyrogallol (PY) were used as ignition promoters with POME for achieving improved cetane number and enhanced ignition. In order to utilize the maximum available energy in the fuel thermal barrier coating was attempted. Partially Stabilized Zirconia coating on combustion chamber components leads to diminished heat loss from engine. The aim of the present experimentation was to analyze the consequence of papaya seed oil biodiesel with presence of ignition promoter in coated and uncoated engine characteristics. In PSZ coated engine, POME and PY blend showed 3.15% of increased thermal efficiency with 2.17% of declined fuel consumption. Reduced emissions were noticed with POME and PY blend in PSZ coated engine. Superior combustion efficiency, in-cylinder pressure, heat release rate and combustion duration were witnessed with POME and PY blend in coated engine due to short ignition delay. The practice of using ignition promoter-treated biodiesel in thermally coated engine was said to be the prominent method for achieving enhanced engine characteristics.

Renewable Energy published new progress about Absorption. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Computed Properties of 929-77-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Munoz-Olasagasti, M. published the artcileThe relevance of Lewis acid sites on the gas phase reaction of levulinic acid into ethyl valerate using CoSBA-xAl bifunctional catalysts, SDS of cas: 539-88-8, the main research area is levulinic acid ethyl valerate bifunctional catalyst gas phase reaction.

A series of Co supported on Al-modified SBA-15 catalysts has been studied in the gas phase direct transformation of levulinic acid (LA) into Et valerate (EV) using a continuous fixed-bed reactor and ethanol as solvent. It was observed that once the intermediate product gamma-valerolactone (GVL) has been formed, the presence of aluminum is required for the selective transformation to EV. Three Lewis acid sites (LAS) are identified (from highest to lowest acid strength): aluminum ions in tetrahedral and octahedral coordination and Co+ sites. The intrinsic activity of these LAS for the key reaction, the GVL ring opening, decreases with the strength of these acid sites, but so does the undesirable formation of coke, also catalyzed by these centers. The best catalyst was that with the highest Al content, CoSBA-2.5Al, that reached an EV yield of up to 70%. This result is associated with the presence of LAS attributed to the presence of Co+ surface species that, although having low intrinsic activity in the selective GVL ring-opening reaction, are highly concentrated in this sample and also possess less activity in the undesirable and deactivating formation of coke. These Co2+ LAS have been stabilized by incorporation of aluminum into the support, modifying the reducibility and dispersion of cobalt species. Addnl., the lower proportion of metallic Co species decreases the hydrogenating capacity of this catalyst. This decrease is a pos. result because it prevents GVL hydrogenation to undesired products. This catalyst also showed promising stability in a 140 h onstream run.

Catalysis Science & Technology published new progress about Absorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, SDS of cas: 539-88-8.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Meng, Jie published the artcilegold nanocluster surface ligand exchange: an oxidative stress amplifier for combating multidrug resistance bacterial infection, Formula: C24H14Cl2O7, the main research area is gold nanocluster amplifier oxidative stress multidrug resistance; Au NCs; Bacterial multidrug resistance; Cinnamaldehyde; Ligand exchange strategy; Oxidative stress amplifier; Redox balance.

The bacteria redox balance between oxidizing and reducing species plays a critical role in bacterial activities, and the disruption of this homeostasis offers a flexible antibacterial strategy to combat bacterial multidrug resistance. Here, the ligand exchange strategy of Au NCs was first developed to construct an oxidative stress amplifier. We cleverly utilized the reactive oxygen species (ROS) generation ability of histidine (His)-stabilized Au NCs. Cinnamaldehyde (CA) was modified on the surface of Au NCs through an aldimine condensation reaction, and the modification of CA on the surface of Au NCs further accelerated ROS generation. Meanwhile, the strong Au-S interaction between CA-Au NCs and thiols facilitated the ligand exchange of surface histidine-cinnamaldehyde (His-CA) with thiol mols., causing the consumption of thiols in bacteria and the release of His-CA, which thus finally resulted in efficient bacterial cell death. CA-Au NCs showed excellent antibacterial effects on methicillin-resistant Staphylococcus aureus (MRSA), including 48-h biofilm removal and the treatment of a pig skin wound infection model, representing a promising antibacterial agent for clin. applications.

Journal of Colloid and Interface Science published new progress about Absorption. 2044-85-1 belongs to class esters-buliding-blocks, name is 2′,7′-Dichloro-3-oxo-3H-spiro[isobenzofuran-1,9′-xanthene]-3′,6′-diyl diacetate, and the molecular formula is C24H14Cl2O7, Formula: C24H14Cl2O7.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Kujur, Anupam published the artcileFabrication, Characterization, and Antifungal Assessment of Jasmine Essential Oil-Loaded Chitosan Nanomatrix Against Aspergillus flavus in Food System, Related Products of esters-buliding-blocks, the main research area is Aspergillus flavus jasmine essential oil chitosan antifungal food system.

The present study investigated the antifungal and aflatoxin B1 (AFB1) inhibitory efficacy of Jasmine essential oil-loaded in the chitosan nanoparticle (JEO-NP) with probable antifungal and anti-aflatoxin B1 mode of action against Aspergillus flavus. The prepared JEO-NP was characterized through FTIR and XRD. The maximum percent encapsulation efficiency (75.51% weight/weight) and loading capacity (5.65% weight/weight) were found at the 1:1 ratio of chitosan: JEO. The results of thermogravimetric anal. exhibited an increase in thermal stability of JEO-NP compared to the free JEO. The antifungal and AFB1 inhibitory concentration of JEO-NP was found to be 2.5μL/mL against A. flavus, which was lower than free form JEO (3.0μL/mL). Biochem. and in silico approaches revealed the antifungal mechanisms of action of JEO-NP were related to the inhibition in ergosterol biosynthesis, leakage of vital ions (Ca+2, Mg+2, and K+), impairment in carbon substrate utilization, and functioning of the AFB1 regulatory genes (ver-1 and omt A (in silico)) of A. flavus. JEO-NP exhibited free radical scavenging activity through DPPH assay (IC50 1.31μL/mL). The in situ results showed that JEO-NP significantly protects the maize seed samples from A. flavus growth, AFB1 contamination and also preserved its nutritional quality. The absorption, distribution, metabolism, excretion, and toxicity (ADMET) profiling revealed the JEO major components are non-mutagenic, non-hepatotoxic, non-carcinogenic, non-tumorigenic, biodegradable nature, and predicted toxicity (LD50 mg/kg rat) were ranged 3107.01 to 3960.22 mg/kg. The findings revealed that the nanoencapsulation technique could be used to enhance the antifungal efficacy of plant essential oil in the food system.

Food and Bioprocess Technology published new progress about Absorption. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Related Products of esters-buliding-blocks.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Stachulski, Andrew V. published the artcileSynthesis, antiviral activity, preliminary pharmacokinetics and structural parameters of thiazolide amine salts, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, the main research area is thiazolide amine salt xray crystal structure antiviral activity pharmacokinetics; amine salts; antiviral; pharmacokinetics; thiazolides; x-ray structure.

The thiazolides, typified by nitazoxanide, are an important class of anti-infective agents. A significant problem with nitazoxanide and its active circulating metabolite tizoxanide is their poor solubility We report the preparation and evaluation of a series of amine salts of tizoxanide and the corresponding 5-Cl thiazolide. These salts demonstrated improved aqueous solubility and absorption, as shown by physicochem. and in vivo measurements. They combine antiviral activity against influenza A virus with excellent cell safety indexes. We also report the x-ray crystal structural data of the ethanolamine salt. The ethanol salt of thiazolide retains the activity of the parent together with an improved cell safety index, making it a good candidate for further evaluation.

Future Medicinal Chemistry published new progress about Absorption. 55981-09-4 belongs to class esters-buliding-blocks, name is 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate, and the molecular formula is C12H9N3O5S, Name: 2-((5-Nitrothiazol-2-yl)carbamoyl)phenyl acetate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics