Category: 3290-92-4

Liu, Bin; Wang, Yanling; Liang, Lei published the artcile< Preparation and performance of supercritical carbon dioxide thickener>, Application of C18H26O6, the main research area is supercritical carbon dioxide thickener preparation; core damage; greenhouse effect; molecular simulation; supercritical carbon dioxide; thickener.

The low sand-carrying problem caused by the low viscosity of supercritical carbon dioxide (SC-CO2) limits the development of supercritical CO2 fracturing technol. In this study, a mol. simulation method was used to design a fluorine-free solvent-free SC-CO2 thickener 1,3,5,7-tetramethylcyclotetrasiloxane (HBD). Simulations and experiments mutually confirm that HBD-1 and HBD-2 have excellent solubility in SC-CO2. The apparent viscosity of SC-CO2 after thickening was evaluated with a self-designed and assembled capillary viscometer. The results show that when the concentration of HBD-2 is 5 weight% (305.15 K, 10 MPa), the viscosity of SC-CO2 increases to 4.48 mPa. Combined with the capillary viscometer and core displacement device, the low damage of SC-CO2 fracturing fluid to the formation was studied. This work solves the pollution problems of fluoropolymers and co-solvents to organisms and the environment and provides new ideas for the mol. design and research of SC-CO2 thickeners.

Polymers (Basel, Switzerland) published new progress about Cloud point. 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

Lotierzo, Andrea; Longbottom, Brooke W.; Lee, Wai Hin; Bon, Stefan A. F. published the artcile< Synthesis of Janus and Patchy Particles Using Nanogels as Stabilizers in Emulsion Polymerization>, Quality Control of 3290-92-4, the main research area is Janus patchy particle nanogel stabilizer emulsion polymerization; Janus; emulsion polymerization; interface; nanogels; patchy particles; polymer colloids.

Polymer nanogels are used as colloidal stabilizers in emulsion polymerization The nanogels were made by the covalent crosslinking of block copolymer micelles, the macromol. building blocks of which were synthesized using a combination of catalytic chain transfer emulsion polymerization and reversible addition-fragmentation chain transfer (RAFT) of methacrylate monomers. The use of the nanogels in an emulsion polymerization led to anisotropic Janus and patchy colloids, where a latex particle was decorated by a number of patches on its surface. Control of the particle size and patch d. was achieved by tailoring of the reaction conditions, such as varying the amount of nanogels, pH, and salt concentration Overall, the emulsion polymerization process in the presence of nanogels as stabilizers is shown to be a versatile and easily scalable route toward the fabrication of Janus and patchy polymer colloids.

ACS Nano published new progress about Chain transfer. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Quality Control of 3290-92-4.

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

Lin, Cuiying; Huang, Qingqing; Lu, Yilei; Li, Zhixin; Wang, Peilong; Qiu, Bin; Lin, Zhenyu published the artcile< Detection of hydroxypolychlorinated biphenyls using molecularly imprinted polymers as recognition unit and timer as readout>, SDS of cas: 3290-92-4, the main research area is molecularly imprinted polymer hydroxypolychlorinated biphenyl detection.

The total flow time of an hourglass is depending on the effective diameter of the neck pipe if the amount of sand is fixed. Molecularly imprinted polymers (MIPs) can recognize the targets with high selectivity. In this study, these characters had been combined together and applied to develop a sensor using a simple timer as readout for the first time. Hydroxy polychlorinated biphenyls (OH-PCBs) had been chosen as the model target. If the MIPs had bounded with the OH-PCBs, the imprinting cavity of the MIPs can be blocked by the target, and the effective pore diameter of the column decreased. When the 25 ppb OH-PCBs was adsorbed, the average pore size of the MIPs decreased from 1.4614 nm to 1.3964 nm, and the pore volume decreased from 0.001928 cm3/g to 0.001697 cm3/g. As a result, the total time needed for the complete outflow of a certain amount of water increased accordingly. The total time had a relationship with OH-PCBs concentration in the range of 1.0 to 100 ppb, and the detection limit was as low as 0.3 ppb. The proposed technique has been successfully applied for the detection of 4′-OH-PCB 30 in the environmental samples. The detection of different targets could be easily achieved by simply changing MIPs of different imprints.

Microchemical Journal published new progress about Molecularly imprinted polymers. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, SDS of cas: 3290-92-4.

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

Tonucci, Marina C.; Fidelis, Ana Luiza S.; Baeta, Bruno Eduardo L.; Tarley, Cesar Ricardo T.; de Aquino, Sergio F. published the artcile< Influence of synthesis conditions on the production of molecularly imprinted polymers for the selective recovery of isovaleric acid from anaerobic effluents>, Application of C18H26O6, the main research area is molecularly imprinted polymer isovalerate anaerobic effluent.

Two molecularly imprinted polymers (MIPs) – poly(methacrylic acid-co-TRIM) (TRIM, trimethylolpropanetrimethacrylate) and poly(acylamide-co-TRIM) – were synthesized in different solvents for the selective recovery of isovaleric acid (template) generated during the anaerobic digestion process. The chem. and structural characterizations of the synthetic adsorbent were carried out by Fourier transform IR spectroscopy, TGA and porosimetry through N2 adsorption-desorption isotherms. The selective and adsorptive performances of the imprinted polymers were evaluated by kinetic, isothermal, thermodn. and selectivity studies and by adsorbent reuse experiments The poly(methacrylic acid-co-TRIM) synthesized with DMSO:chloroform presented higher selectivity and adsorption capacity for isovaleric acid in the presence of six volatile fatty acids. The kinetic results were well adjusted to the pseudo-nth order and intraparticle diffusion models, leading to k values of 10-4 and 6 × 10-5 for the best synthesis of MIPs and not-imprinted polymers, resp. Moreover, the Sips model best described the adsorption isotherm and generated a maximum adsorption capacity of ca 209 mg g-1 (at 25 °C). Cycles of MIP use-desorption-reuse indicated that the selective adsorbent performed better than com. adsorbents, losing less than 3% of adsorption capacity after three cycles. © 2018 Society of Chem. Industry.

Polymer International published new progress about Adsorption (isotherm). 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

Kim, Yune Sung; Kim, Jeong Soo; Sun, Genlin; Cheong, Won Jo published the artcile< Development of a New Solid Phase Extraction Cartridge Filled with Organic Monolith Particles for Extraction of di-Alkyl Phthalates>, Electric Literature of 3290-92-4, the main research area is dialkyl phthalate monolith particle phase extraction.

In this study, a new soft organic monolith was prepared by polymerization of Me methacrylate (MMA) and trimethylpropane trimetharylate (TPTM) to provide good affinity toward the analytes (di-alkyl phthalates) in SPE.

Bulletin of the Korean Chemical Society published new progress about Monolithic materials. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Electric Literature of 3290-92-4.

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

Manaila, E.; Craciun, G.; Stelescu, M. D.; Ighigeanu, D. published the artcile< Radiation vulcanization of EPDM rubber with polyfunctional monomers>, COA of Formula: C18H26O6, the main research area is EPDM rubber radiation vulcanization crosslink density.

The most important stage in ethylene-propylene-terpolymer rubber processing technol. is vulcanization/ crosslinking. The effect of polyfunctional monomers as triallylcyanurate, triallylisocyanurate, trimethylopropane trimethacrylate, and zinc diacrylate on the crosslink d. of ethylene-propylene-terpolymer rubber processed by electron beam irradiation using a 5.5 MeV electron accelerator was presented. The dependence of cross-link d. on the irradiation dose was also determined in the dose range of 50 to 500 kGy. The results have showed that the crosslink d. is very sensitive to the polyfunctional monomers use.

Acta Physica Polonica A published new progress about Crosslink density. 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

Li, Shangqing; Tian, Hongchi; Wu, Hanguang; Ning, Nanying; Tian, Ming; Zhang, Liqun published the artcile< Coupling effect of molecular weight and crosslinking kinetics on the formation of rubber nanoparticles and their agglomerates in EPDM/PP TPVs during dynamic vulcanization>, Computed Properties of 3290-92-4, the main research area is dynamic vulcanization EPDM polypropylene blend crosslinking.

It is well-known that a fine dispersed rubber phase in thermoplastic vulcanizates (TPVs) is a key to obtain good mech. properties and high elasticity of TPV products. Previous studies reported that the rubber nanodroplets formed during shearing blending can transform into rubber nanoparticles by in situ rapid crosslinking and these rubber nanoparticles spontaneously form agglomerates dispersed in a plastic matrix during dynamic vulcanization (DV). However, important influencing factors on the formation of rubber nanoparticles and their agglomeration during DV have not been reported yet. In this study, the coupling effect of the mol. weight (MW) of polypropylene (PP) and crosslinking kinetics including the crosslinking rate (CR) and crosslinking degree (CD) on the size of ethylene propylene diene monomer (EPDM) rubber nanoparticles and their agglomerates in EPDM/PP TPVs was systematically studied for the first time. The min. diameter of EPDM nanodroplets was theor. calculated by using the critical break-up law of viscoelastic melts for the blend with high MW PP or the critical capillary equation for the blend with low MW PP, and the real size of the EPDM nanoparticles was exptl. verified. Interestingly, the results show that the lower MW of the PP phase, lower CD and higher CR contribute to the formation of smaller rubber nanoparticles, whereas the higher MW of the PP phase and higher CD of the rubber phase contribute to the formation of smaller rubber nanoparticle agglomerates. This study provides guidance to optimize the microstructure of EPDM/PP TPVs for the preparation of high-performance TPV products.

Soft Matter published new progress about Crosslink density. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Computed Properties of 3290-92-4.

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

Gong, Haiyue; Zhang, Ka; Dicko, Cedric; Bulow, Leif; Ye, Lei published the artcile< Ag-Polymer Nanocomposites for Capture, Detection, and Destruction of Bacteria>, Recommanded Product: 2-Ethyl-2-((methacryloyloxy)methyl)propane-1,3-diyl bis(2-methylacrylate), the main research area is silver nanoparticle polymer nanocomposite bacteria capture detection destruction.

Bacterial infection is 1 of the major problems for human health. To prevent outbreak of bacteria-caused diseases, early diagnosis of bacterial pathogen and effective destruction of pathogenic microorganisms are in urgent need. We developed a new multifunctional nanocomposite material that can effectively capture and destroy bacteria. Epoxide-modified nanoparticles were synthesized by micro-emulsion polymerization and precipitation polymerization The epoxide groups on the particle surface were reacted with polyethyleneimine to introduce cationic amine groups. The amine groups on the nanoparticle surface enhanced the colloidal stability of the particles’ suspension, and provided multivalent interactions to bind and destroy the bacteria. After further modification with Ag nanoparticles, the final composite nanomaterial was able to not only capture and destroy Gram-neg. bacteria, but also allow the bacteria’s fingerprint spectra to be obtained through surface-enhanced Raman scattering. The multifunctional nanoparticles developed offer a new approach towards fast capture, detection, and destruction of pathogenic bacteria.

ACS Applied Nano Materials published new progress about Antibacterial agents. 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

Fan, Pei-Ru; Zhao, Xue; Wei, Ze-Hui; Huang, Yan-Ping; Liu, Zhao-Sheng published the artcile< Robust immobilized enzyme reactor based on trimethylolpropane trimethacrylate organic monolithic matrix through ""thiol-ene"" click reaction>, Application In Synthesis of 3290-92-4, the main research area is immobilized enzyme reactor trimethylolpropane trimethacrylate organic monolithic matrix.

A novel immobilized enzyme reactor (IMER) based on trimethylolpropane trimethacrylate (TRIM) organic monolith was prepared by “”thiol-ene”” click reaction. The IMERs were made by fabricating TRIM monolith core in advance. There were residual double bonds on the surface of TRIM monolith, in which click reaction can be performed with the free thiol groups of trypsin at room temperature to bond the trypsin on the monolithic column without addnl. introducing an active functional group. The enzyme activity was characterized by kinetic parameters Km and Vmax and determined by off-line chromatog. The performance of the IMERs was evaluated by digesting standard protein BSA and compared with in-solution digestion method. By using IMER 5 min, the sequence coverage rate of BSA was 79.41%, which was similar to that in-solution digestion for 12 h (82.7%). The applicability of the IMERs in complex samples was assessed by digesting crude protein extracts from egg white and mouse liver, identifying 28 (104 peptides) and 843 (3916 peptides) proteins, resp. All results indicated that the IMERs have great potential in high-throughput proteomics anal.

European Polymer Journal published new progress about Bioreactors. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Application In Synthesis of 3290-92-4.

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

Fu, Yunxing; Zhang, Dezhong; Zhan, Hongmei; Zhao, Chenyang; Cheng, Yanxiang; Qin, Chuanjiang; Wang, Lixiang published the artcile< Engineering of Annealing and Surface Passivation toward Efficient and Stable Quasi-2D Perovskite Light-Emitting Diodes>, COA of Formula: C18H26O6, the main research area is perovskite light emitting diode annealing surface passivation.

Solution-processed quasi-two-dimensional (quasi-2D) perovskites with self-assembled multiple quantum well (QW) structures exhibit enhanced exciton binding energy, which is ideal for use as light emitters. Here, we have found that postannealing is important to promoting the QWs’ composition transfer, and we explored the correlation among the annealing time, the external quantum efficiency (EQE), and the operational stability of the device. During thermal annealing, the low-n QWs will gradually convert to high-n phases, accompanied by an increase in grain size. The EQE and working stability of the device exhibit different annealing-time dependences; i.e., with the extension of the annealing time, the EQE gradually decreases while the working stability improves. By introducing trimethylolpropane trimethacrylate (TPTA) to passivate the emitting-region defects, the annealing-time dependence of the EQE was effectively eliminated due to the reduction of the nonradiative recombination rate, wherefore high efficiency and stability can be achieved simultaneously. Our research provides an effective way to develop highly efficiency and stable perovskite light-emitting diodes.

Journal of Physical Chemistry Letters published new progress about Annealing. 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