Category: 3290-92-4

Liu, Jun-bo; Chang, Hanqi; Zhao, Wensi; Liang, Dadong; Tang, Shanshan; Jin, Ruifa published the artcile< Theoretical design and preparation of molecularly imprinted polymers of formaldehyde and acrylamide>, Related Products of 3290-92-4, the main research area is molecularly imprinted acrylamide polymer preparation formaldehyde adsorption.

The B3LYP/6-31G(d,p) level was performed to simulated the formaldehyde (HCHO), a molecularly imprinted self-assembly system with acrylamide (AM) as the functional monomer. HCHO-molecularly imprinted polymers (MIPs) were prepared using thermally initiated precipitation polymerization based on the calculation results. The adsorption, selectivity and stability of HCHO-MIPs were characterised and analyzed. The results revealed that the complex with an orderly arrangement of HCHO and AM had the lowest configurational energy (-109.51 kJ/mol) when the ratio of HCHO and AM was 1:4, and the crosslinking agent was pentaerythritol triacrylate. HCHO-MIPS prepared using HCHO, AM and PETA in the ratio of 1:4:16 had the best imprinting effect under certain conditions: 289-K temperature, 400-mg/L HCHO solution concentration, and 400-min absorption time. The maximum clear adsorption capacity and dissociation-equilibrium constants were 54.67 mg/g and 72.46 mg/L, resp. The pseudo-second-order kinetic equation was used to fit the adsorption capacity. Thermodn. studies showed that the adsorption of HCHO by HCHO-MIPs was an exothermic process. The selectivity study showed that the adsorption capacity of HCHO-MIPs for HCHO was higher than that of benzaldehyde, propionaldehyde and glyoxylic acid, showing a strong specific adsorption capacity. The HCHO-MIPs prepared using this synthetic strategy exhibited better adsorption, selectivity and stability.

Journal of Polymer Research published new progress about Adsorption. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Related Products of 3290-92-4.

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

Guan, Xin; Ngai, To published the artcile< pH-Sensitive W/O Pickering High Internal Phase Emulsions and W/O/W High Internal Water-Phase Double Emulsions with Tailored Microstructures Costabilized by Lecithin and Silica Inorganic Particles>, COA of Formula: C18H26O6, the main research area is emulsion Pickering silica nanoparticle lecithin.

Synergistic stabilization of Pickering emulsions by a mixture of surfactants and colloidal particles has received increasing interest in recent years but only a few of them can produce high internal phase double emulsions (HIPDEs) with good stability. In this study, we present a feasible and common method of preparing Pickering high internal phase emulsions (HIPEs) with tunable inner morphol. costabilized by a biosurfactant lecithin and silica nanoparticles. We investigate the influence of the pH value on the interfacial behavior of lecithin and elucidate the synergistic mechanism between lecithin and silica nanoparticles in different conditions in the stability of as-prepared emulsions. Specifically, water-in-oil (W/O) Pickering HIPEs can be successfully stabilized by lecithin and hydrophobic silica nanoparticles in a wide pH range (pH 1-10), while catastrophic phase inversion occurred at high pH values (pH ≥ 11). Interestingly, stable water-in-oil-in-water (W/O/W) high internal phase double emulsions (HIPDEs) can also be prepared via a two-step method by the cooperation of lecithin and silica nanoparticles. Moreover, functional interconnected porous monoliths and microspheres are facilely fabricated by emulsion templates and their potential applications are explored.

Langmuir published new progress about Contact angle. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, COA of Formula: C18H26O6.

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

Zhang, Wen-ji; Li, Dong; Xu, Yingjian; Jiang, Zhaolin; Chen, Yang; Wang, Peng published the artcile< Synthesis and Application of Novel Molecularly Imprinted Solid Phase Extraction Materials Based on Carbon Nanotubes for Determination of Carbofuran in Human Serum by High Performance Liquid Chromatography>, Safety of 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is molecularly imprinted polymer carbon nanotube carbofuran extraction; HPLC analysis; carbofuran; carbon nanotubes; molecularly imprinted; serum.

Novel molecularly imprinted polymers (MIPs) based on multiwalled carbon nanotubes (MWNTs) were synthesized using carbofuran as template, methacrylic acid as functional monomer, and trimethylolpropane trimethacrylate as cross-liking agent, resp. Characterization results showed that the carbofuran MIPs have been successfully grafted onto the surface of MWNTs as a thin layer with high stability. The results of adsorption dynamics indicated that the synthesized MWNT-MIPs displayed a biphase adsorption profile and good selective recognition to carbofuran with equilibrium adsorption of 106.2 mg/g. The MWNTs-MIPs synthesized were further applied as the adsorbent material of solid-phase extraction (SPE) for the pretreatment of carbofuran in human serum, analyzed using high performance liquid chromatograph (HPLC). The recoveries obtained ranged from 89.0±4.8 to 93.6±3.2, showing that the MWNTs-MIPs-SPE system developed have specific recognition toward carbofuran. Results above indicated that the proposed system filled with synthesized MWNTs-MIPs provided a fast and selective extraction of carbofuran in serum.

Journal of Agricultural and Food Chemistry published new progress about Adsorbents. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Safety of 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate).

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

Suryana, Shendi; Mutakin, Mutakin; Rosandi, Yudi; Hasanah, Aliya Nur published the artcile< Rational design of salmeterol xinafoate imprinted polymer through computational method: Functional monomer and crosslinker selection>, Category: esters-buliding-blocks, the main research area is salmeterol xinafoate imprinted polymer computational functional monomer crosslinker selection.

A mol. imprinted polymer (MIP) was computationally designed and synthesized for the selective extraction of salmeterol xinafoate (SLX) from human serum. In this study, semi-empirical PM3 calculations were used to find a suitable functional monomer (FM), the ratio of template (T) to FM, and types of crosslinkers. MIPs were synthesized with 2-hydroxyethyl methacrylate (HEMA) with T:FM mol ratios of 1:6 and 1:4 and ethylene glycol dimethacrylate (EGDMA) or trimethylolpropane trimethacrylate (TRIM) as a crosslinker. On the basis of computational and exptl. results, HEMA and TRIM in the mol ratio 1:6 of T-FM (MIP3) were found to be the best choices of FM and crosslinker, resp. These polymers were then used as a selective sorbent to develop a molecularly imprinted solid-phase extraction procedure followed by high performance liquid chromatog. with UV detection for the determination of SLX in serum. The extraction ability of MIP3 was excellent with a recovery of 92.17% ± 2.66% of SLX in spiked serum, and 91.15% ± 1.12% when SLX was spiked as a mixture with another analogous structure. By comparing the performance of the synthesized sorbent with a C-18 cartridge with a recovery of 79.11% ± 2.96%, it was determined that MIP had better performance over the latter. On the basis of these results, the imprinted receptor MIPs, especially MIP 3, can be applied for the direct extraction of SLX in clin. anal.

Polymers for Advanced Technologies published new progress about Adsorption. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Category: esters-buliding-blocks.

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

Su, Changlin; Li, Zhiyang; Zhang, Di; Wang, Zhimei; Zhou, Xin; Liao, Lifu; Xiao, Xilin published the artcile< A highly sensitive sensor based on a computer-designed magnetic molecularly imprinted membrane for the determination of acetaminophen>, Application of C18H26O6, the main research area is serum urine acetaminophen magnetic molecularly imprinted membrane; Acetaminophen; Carbon paste electrode; Electrochemical sensor; Magnetic molecularly imprinted membrane.

In this paper, a sensor based on a magnetic surface molecularly imprinted membrane (MMIP) was prepared for the highly sensitive and selective determination of acetaminophen (AP). Before the experiment, the appropriate functional monomers and solvents required for the polymer were screened, and the mol. electrostatic potentials (MEPs) were calculated by the DFT/B3LYP/6-31 + G method. MMIP with high recognition of AP was synthesized based on Fe3O4 coated SiO2nanoparticles (NPs) with excellent core-shell structure. Next, a carbon paste electrode (CPE) was filled with a piece of neodymium-iron-boron magnet to make magnetic electrode (MCPE), and MMIP/MCPE sensor was obtained by attaching a printed polymer to the surface of the electrode under the strong magnetic. Due to the stable mol. structure of the electrode surface, the sensor is highly effective and accurate for detection of AP using DPV. The DPV response of the sensor exhibited a linear dependence on the concentration of AP from 6 × 10-8 to 5 × 10-5 mol L-1 and 5 × 10-5 to 2 × 10-4 mol L-1, with a detection limit based on the lower linear range of 1.73 × 10-8 mol L-1(S/N = 3). When used for determination of AP in actual samples, the recovery of the sensor to the sample was 95.80-103.76%, and the RSD was 0.78%-3.05%.

Biosensors & Bioelectronics published new progress about Antibodies and Immunoglobulins Role: BSU (Biological Study, Unclassified), BIOL (Biological Study). 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Application of C18H26O6.

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

Pholsrimuang, Priyagorn; Ngernchuklin, Piyalak; Chaiyasat, Preeyaporn published the artcile< Preparation of high performance copolymer microcapsule encapsulated heat storage material without supercooling>, Name: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is methyl methacrylate copolymer microcapsule heat storage material supercooling.

The Me methacrylate (MMA)-based copolymer microcapsules encapsulating Rubitherm27 (RT27) used as a phase change material were successfully prepared by microsuspension polymerization The influence of three types of crosslinked comonomers such as ethylene glycol dimethacrylate), trimethylolpropane trimethacrylate, and divinylbenzene (DVB) on the microcapsule formation was studied at various ratios of MMA:crosslinked comonomer. It was found that using MMA:DVB at 70:30 wt% was the optimum ratio. The obtained microcapsules were nonspherical in shape with a dent and high shell strength. In addition, the latent heats of melting and crystallization of the encapsulated RT27 were about 140 J/g-RT27 which were close to those of the original RT27. However, the crystallization temperatures (Tc) of the encapsulated RT27 (14°C) were lower than that of the original RT27 (25°C) which was called supercooling. To prevent supercooling, the effect of nucleating agents (emulgen 150, 1-octadecanol, and RT58) on decreasing supercooling of the encapsulated RT27 was investigated. The results clearly presented that the addition of at least 5 wt% of RT58 significantly increased Tc (25°C) of the encapsulated RT27, whereas the observed latent heats were pretty close to original RT27.

Polymer-Plastics Technology and Materials published new progress about Encapsulation. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Name: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate).

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

Valverde, David; Garcia-Bernabe, Abel; Andrio, Andreu; Garcia-Verdugo, Eduardo; Luis, Santiago V.; Compan, Vicente published the artcile< Free ion diffusivity and charge concentration on cross-linked polymeric ionic liquid iongel films based on sulfonated zwitterionic salts and lithium ions>, Related Products of 3290-92-4, the main research area is ion diffusivity charge concentration polymeric ionic liquid iongel film; iongel film sulfonated zwitterionic salt lithium ion.

The properties of various mixtures of a zwitterionic ionic liquid (ZIs-1) and LiNTf2, including their conductivity, have been studied showing how they can be adjusted through their molar composition Conductivity tends to increase with the LiNTf2 content although it presents a min. at the region close to the eutectic point. These mixtures also provide excellent features as liquid phases for the preparation of composite materials based on crosslinked PILs. The prepared films display excellent and tuneable properties as conducting materials, with conductivities that can be higher than 10-2 S cm-1 above 100°C. The selected polymeric compositions show very good mech. properties and thermal stability, even for low crosslinking degrees, along with a suitable flexibility and good transparency. The final properties of the films correlate with the composition of the monomeric mixture used and with that of the ZIs-1:LiNTf2 mixture

Physical Chemistry Chemical Physics published new progress about Activation energy. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Related Products of 3290-92-4.

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

Lu, Yi Chen; Xiao, Wei Wei; Wang, Jun Yun; Xiong, Xiao Hui published the artcile< Rapid isolation and determination of bisphenol A in complicated matrices by magnetic molecularly imprinted electrochemical sensing>, Name: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is isolation determination bisphenol A magnetic molecularly imprinted electrochem sensing; Bisphenol A; Electrochemical sensing; Environmental monitoring; Food safety; Magnetic molecularly imprinted polymer.

Because of its widespread distribution in the environment, bisphenol A (BPA) has become a global concern as an endocrine disruptor and a threat to human health through the food chain. Thus an efficient determination method is urgently needed for monitoring the levels of BPA. Herein, a novel electrochem. technique for the detection of BPA was performed by synchronous extraction and pre-concentration of BPA onto magnetic molecularly imprinted polymer (BMMIP), with subsequent readout on a magneto-actuated glassy carbon electrode (MGCE) by differential pulse voltammetry. Compared to the current methods of BPA determination, this BMMIP-based electrochem. sensor (BMMIPs@MGCE) not only simplifies the sample handling procedures substantially, without filtration, centrifugation, or other complex operations, but also can be easily renewed by a controllable magnetic field. As a sensor component, the core-shell BMMIPs exhibited excellent binding capacity (Qe = 82.5 mg g-1), short adsorption equilibrium time (30 s), and outstanding selectivity (k’ = 7.239) towards BPA, as well as stability and recyclability. Importantly, the BMMIPs@MGCE sensor was successfully applied for the on-site monitoring and rapid detection of BPA in complicated real-world specimens, with good recoveries (81.31-119.77%) and a low limit of detection (0.133μmol L-1). Therefore, the stable and low-cost BMMIPs@MGCE sensor provides a new approach for the rapid determination of BPA in the field of environmental control and food safety.

Analytical and Bioanalytical Chemistry published new progress about Adsorption (isotherm). 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Name: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate).

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

Esen, Cem; Czulak, Joanna; Cowen, Todd; Piletska, Elena; Piletsky, Sergey A. published the artcile< Highly Efficient Abiotic Assay Formats for Methyl Parathion: Molecularly Imprinted Polymer Nanoparticle Assay as an Alternative to Enzyme-Linked Immunosorbent Assay>, HPLC of Formula: 3290-92-4, the main research area is abiotic determination format methyl parathion molecularly imprinted polymer nanoparticle.

ELISA is a widely used standard method for sensitive detection of analytes of environmental, clin., or biotechnol. interest. However, ELISA has clear drawbacks related to the use of relatively unstable antibodies and enzyme conjugates and the need for several steps such as washing of nonbound conjugates and addition of dye reagents. Herein, the authors introduce a new completely abiotic assay where antibodies and enzymes are replaced with fluorescent molecularly imprinted polymer nanoparticles (nanoMIPs) and target-conjugated magnetic nanoparticles, which acted as both reporter probes and binding agents. The components of the molecularly imprinted polymer nanoparticle assay (MINA) are assembled in microtiter plates fitted with magnetic inserts. The authors have compared the performance of a new magnetic assay with molecularly imprinted polymer (MIP)-based ELISA for the detection of methyl parathion (MP). Both assays showed high sensitivity toward allowing detection of MP at picomolar concentrations without any cross-reactivity against chlorpyriphos and fenthion. The fully abiotic assays were also proven to detect analyte in real samples such as tap water and milk. Unlike ELISA-based systems, the novel assay required no washing steps or addition of enzyme substrates, making it more user-friendly and suitable for high throughput screening.

Analytical Chemistry (Washington, DC, United States) published new progress about Drinking waters. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, HPLC of Formula: 3290-92-4.

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

Liu, Qinfeng; Jiang, Liang; Zhao, Yuanyang; Wang, Yi; Lei, Jingxin published the artcile< Preparation and characterization of a novel form-stable phase change material for thermal energy storage>, Recommanded Product: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is polytrimethylolpropane trimethacrylate stearyl methacrylate phase change thermal energy storage.

A series of novel polymeric form-stable phase change materials (FSPCMs) composed of poly(trimethylolpropane trimethacrylate-stearyl methacrylate) (PTS) and stearic acid were synthesized via solvent-free bulk polymerization Stearic acid was used as phase change component, and PTS acted as supporting material. The chem. structure, crystalline properties, phase change ability, thermal reliability, and stability were characterized by Fourier transform IR spectroscopy, X-ray diffraction (XRD), polarizing optical microscopy (POM), differential scanning calorimetry (DSC), accelerated thermal cycling testing, and thermogravimetric anal. (TG), resp. The DSC results revealed that the maximum freezing and melting latent heat can reach 143.5 and 146.7 J g-1. The POM and XRD results proved the existence of spherocrystal. Accelerating thermal test and TG demonstrated that FSPCMs had good reliability and stability in practical application. The prepared form-stable phase change materials with high enthalpy and proper phase change temperature have a promising prospect in thermal energy storage.

Journal of Thermal Analysis and Calorimetry published new progress about Crystal structure. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Recommanded Product: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate).

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