Category: 3290-92-4

Okesanjo, Omotola; Tennenbaum, Michael; Fernandez-Nieves, Alberto; Meredith, J. Carson; Behrens, Sven H. published the artcile< Rheology of capillary foams>, Category: esters-buliding-blocks, the main research area is vinyl chloride copolymer capillary foam rheol.

Aqueous foams are ubiquitous; they appear in products and processes that span the cosmetics, food, and energy industries. The versatile applicability of foams comes as a result of their intrinsic viscous and elastic properties; for example, foams are exploited as drilling fluids in enhanced oil recovery for their high viscosity. Recently, so-called capillary foams were discovered: a class of foams that have excellent stability under static conditions and whose flow properties have so far remained unexplored. The unique architecture of these foams, containing oil-coated bubbles and a gelled network of oil-bridged particles, is expected to affect foam rheol. In this work, we report the first set of rheol. data on capillary foams. We study the viscoelastic properties of capillary foams by conducting oscillatory and steady shear tests. We compare our results on the rheol. properties of capillary foams to those reported for other aqueous foams. We find that capillary foams, which have low gas volume fractions, exhibit long lasting rheol. stability as well as a yielding behavior that is reminiscent of surfactant foams with high gas volume fractions.

Soft Matter published new progress about Creep. 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

Sun, Zhian; Liu, Huachun; Zhou, Yanqiang; Zhao, Shanwen; Li, Jianmin; Wang, Xiaoxiao; Gong, Bolin published the artcile< A restricted access molecularly imprinted polymer coating on metal-organic frameworks for solid-phase extraction of ofloxacin and enrofloxacin from bovine serum>, Electric Literature of 3290-92-4, the main research area is ofloxacin enrofloxacin serum solid phase extraction metal organic framework.

A restricted access molecularly imprinted polymer (RAMIP) crosslinked with bovine serum albumin (BSA) was prepared on the surface of the mesoporous UiO-66-NH2 metal-organic framework (MOF). The surface morphol., imprinting behavior, and protein exclusion properties of UiO-66-NH2@RAMIP@BSA were investigated. The maximum adsorption capacity was 50.55 mg g-1 for ofloxacin, with a 99.4% protein exclusion rate. Adsorption equilibrium was reached in 9 min. Combined with RP-HPLC, a solid-phase extraction column filled with UiO-66-NH2@RAMIP@BSA was used to selectively enrich and analyze ofloxacin and enrofloxacin antibiotics from bovine serum with recoveries of 93.7-104.2% with relative standard deviations of 2.0-4.5% (n = 3). The linear range and the limit of detection were 0.1-100μg mL-1 and 15.6 ng mL-1, resp. These results suggest that UiO-66-NH2@RAMIP@BSA is an efficient pretreatment adsorbent for biol. sample anal.

RSC Advances published new progress about Adsorption. 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

Grochowicz, Marta; Szajnecki, Lukasz; Rogulska, Magdalena published the artcile< Crosslinked 4-Vinylpyridine Monodisperse Functional Microspheres for Sorption of Ibuprofen and Ketoprofen>, Electric Literature of 3290-92-4, the main research area is ibuprofen ketoprofen vinylpyridine microsphere crosslinking; SPE; functional polymers; ibuprofen; ketoprofen; polymeric microspheres; porous polymers; sorption.

Nowadays, ibuprofen and ketoprofen are widely used over-the-counter medications to treat inflammation, fever, or pain. Their high consumption and improper disposal cause them to get into the environment and often pollute surface water. In this study, the new polymeric porous microspheres based on 4-vinylpyridine (4VP) are presented as effective sorbents for ibuprofen and ketoprofen preconcentration and removal. The porous microspheres were obtained via seed swelling polymerization with the use of two types of methacrylate crosslinkers, i.e., trimethylolpropane trimethacrylate (TRIM) and 1,4-dimethacryloiloxybenzene (14DMB). Addnl., as a reference sorbent, a copolymer of styrene and divinylbenzene was obtained. Porous structure investigations showed that the microspheres possess a sp. surface area of about 100 m2/g, but noticeable differences were observed in their internal topog. depending on the type of crosslinker used. Moreover, the porous structure of dry and swollen microspheres differs significantly. Swollen copolymers reveal the presence of micropores. The 4VP microspheres are characterized by high thermal stability; their initial decomposition temperature is about 300°C. The performance of the 4VP copolymers as sorbents in aqueous solutions of drugs was evaluated in static and dynamic modes at three pH values of 3, 7, and 11. The highest sorption efficiency was obtained for ibuprofen and ketoprofen in pH 3. Both 4VP copolymers indicate the high sorption capacity in a static sorption as follows: towards ketoprofen of about 40 mg/g whereas towards ibuprofen of about 90 mg/g and 75 mg/g on copolymer crosslinked with trimethylolpropane trimethacrylate and 1,4-dimethacryloiloxybenzene, resp. The recovery of ibuprofen and ketoprofen after dynamic sorption experiments was higher than 90%.

Polymers (Basel, Switzerland) published new progress about Adsorption. 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

Li, Wenbang; Wu, Fangling; Dai, Yongwei; Zhang, Jing; Ni, Bichen; Wang, Jiabin published the artcile< Poly (octadecyl methacrylate-co-trimethylolpropane trimethacrylate) monolithic column for hydrophobic in-tube solid-phase microextraction of Chlorophenoxy acid herbicides>, Synthetic Route of 3290-92-4, the main research area is chlorophenoxy acid herbicide polyoctadecyl methacrylate trimethylolpropane trimethacrylate microextraction; HPLC; chlorophenoxy acid herbicides; hydrophobic in-tube solid-phase microextraction; poly (OMA-co-TRIM) monolithic column; rice grains.

Chlorophenoxy acid herbicides (CAHs), which are widely used on cereal crops, have become an important pollution source in grains. In this work, a highly hydrophobic poly (octadecyl methacrylate-co-trimethylolpropane trimethacrylate) [poly (OMA-co-TRIM)] monolithic column has been specially prepared for hydrophobic in-tube solid-phase microextraction (SPME) of CAHs in rice grains. Due to the hydrophobicity of CAHs in acid conditions, trace CAHs could be efficiently extracted by the prepared monolith with strong hydrophobic interaction. Several factors for online hydrophobic in-tube SPME, including the length of the monolithic column, ACN and trifluoroacetic acid percentage in the sampling solution, elution volume, and elution flow rate, were investigated with respect to the extraction efficiencies of CAHs. Under the optimized conditions, the limits of detection of the four CAHs fell in the range of 0.9-2.1 μg/kg. The calibration curves provided a wide linear range of 5-600 μg/kg and showed good linearity. The recoveries of this method ranged from 87.3% to 111.6%, with relative standard deviations less than 7.3%. Using this novel, highly hydrophobic poly (OMA-co-TRIM) monolith as sorbent, a simple and sensitive online in-tube SPME-HPLC method was proposed for anal. of CAHs residue in practical samples of rice grains.

Molecules published new progress about Microextraction (Solid-Phase). 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Synthetic Route of 3290-92-4.

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

Gong, Haiyue; Hajizadeh, Solmaz; Liu, Weifeng; Ye, Lei published the artcile< Imprinted Polymer Beads Loaded with Silver Nanoparticles for Antibacterial Applications>, Application of C18H26O6, the main research area is Polymer beads Silver hydrophobic nanoparticles antibacterial; Pickering emulsion; bacteria imprinting; hydrophobic Ag nanoparticles; polyethylenimine; surface imprinting.

After the emergence of multidrug-resistant strains, antibiotic resistance in bacteria has become an important problem. Thus, materials for combating multidrug-resistant bacteria are of vital importance. In this work, we developed an antibacterial material that can selectively capture and destruct bacteria on the basis of their phys. characteristics. To achieve bacterial capture and deactivation with a single material, we used bacterial cells as templates to synthesize surface-imprinted polymer beads in bacteria-stabilized Pickering emulsions. Acrylate-functionalized polyethylenimine was used to coat the bacterial surface so that the coated bacteria can act as a particle stabilizer to establish an oil-in-water Pickering emulsion. Hydrophobic Ag nanoparticles were introduced into the oil phase composed of crosslinking monomers. Bacteria-imprinted beads (BIB) were obtained after the oil phase was polymerized Bacterial binding experiments confirmed the importance of the imprinted sites for specific recognition with the target bacteria. The Ag nanoparticles embedded inside the polymer beads enhanced bacterial inactivation and reduced the leakage of heavy metal in aquatic environment. The combination of bacteria-imprinting with delivery of general-purpose antibacterial reagents offers a useful approach toward selective capture and destruction of bacteria.

ACS Applied Bio Materials published new progress about Antibacterial agents. 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

Grochowicz, Marta; Szajnecki, Lukasz; Rogulska, Magdalena published the artcile< Crosslinked 4-Vinylpyridine Monodisperse Functional Microspheres for Sorption of Ibuprofen and Ketoprofen>, Electric Literature of 3290-92-4, the main research area is ibuprofen ketoprofen vinylpyridine microsphere crosslinking; SPE; functional polymers; ibuprofen; ketoprofen; polymeric microspheres; porous polymers; sorption.

Nowadays, ibuprofen and ketoprofen are widely used over-the-counter medications to treat inflammation, fever, or pain. Their high consumption and improper disposal cause them to get into the environment and often pollute surface water. In this study, the new polymeric porous microspheres based on 4-vinylpyridine (4VP) are presented as effective sorbents for ibuprofen and ketoprofen preconcentration and removal. The porous microspheres were obtained via seed swelling polymerization with the use of two types of methacrylate crosslinkers, i.e., trimethylolpropane trimethacrylate (TRIM) and 1,4-dimethacryloiloxybenzene (14DMB). Addnl., as a reference sorbent, a copolymer of styrene and divinylbenzene was obtained. Porous structure investigations showed that the microspheres possess a sp. surface area of about 100 m2/g, but noticeable differences were observed in their internal topog. depending on the type of crosslinker used. Moreover, the porous structure of dry and swollen microspheres differs significantly. Swollen copolymers reveal the presence of micropores. The 4VP microspheres are characterized by high thermal stability; their initial decomposition temperature is about 300°C. The performance of the 4VP copolymers as sorbents in aqueous solutions of drugs was evaluated in static and dynamic modes at three pH values of 3, 7, and 11. The highest sorption efficiency was obtained for ibuprofen and ketoprofen in pH 3. Both 4VP copolymers indicate the high sorption capacity in a static sorption as follows: towards ketoprofen of about 40 mg/g whereas towards ibuprofen of about 90 mg/g and 75 mg/g on copolymer crosslinked with trimethylolpropane trimethacrylate and 1,4-dimethacryloiloxybenzene, resp. The recovery of ibuprofen and ketoprofen after dynamic sorption experiments was higher than 90%.

Polymers (Basel, Switzerland) published new progress about Adsorption. 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

Li, Wenbang; Wu, Fangling; Dai, Yongwei; Zhang, Jing; Ni, Bichen; Wang, Jiabin published the artcile< Poly (octadecyl methacrylate-co-trimethylolpropane trimethacrylate) monolithic column for hydrophobic in-tube solid-phase microextraction of Chlorophenoxy acid herbicides>, Synthetic Route of 3290-92-4, the main research area is chlorophenoxy acid herbicide polyoctadecyl methacrylate trimethylolpropane trimethacrylate microextraction; HPLC; chlorophenoxy acid herbicides; hydrophobic in-tube solid-phase microextraction; poly (OMA-co-TRIM) monolithic column; rice grains.

Chlorophenoxy acid herbicides (CAHs), which are widely used on cereal crops, have become an important pollution source in grains. In this work, a highly hydrophobic poly (octadecyl methacrylate-co-trimethylolpropane trimethacrylate) [poly (OMA-co-TRIM)] monolithic column has been specially prepared for hydrophobic in-tube solid-phase microextraction (SPME) of CAHs in rice grains. Due to the hydrophobicity of CAHs in acid conditions, trace CAHs could be efficiently extracted by the prepared monolith with strong hydrophobic interaction. Several factors for online hydrophobic in-tube SPME, including the length of the monolithic column, ACN and trifluoroacetic acid percentage in the sampling solution, elution volume, and elution flow rate, were investigated with respect to the extraction efficiencies of CAHs. Under the optimized conditions, the limits of detection of the four CAHs fell in the range of 0.9-2.1 μg/kg. The calibration curves provided a wide linear range of 5-600 μg/kg and showed good linearity. The recoveries of this method ranged from 87.3% to 111.6%, with relative standard deviations less than 7.3%. Using this novel, highly hydrophobic poly (OMA-co-TRIM) monolith as sorbent, a simple and sensitive online in-tube SPME-HPLC method was proposed for anal. of CAHs residue in practical samples of rice grains.

Molecules published new progress about Microextraction (Solid-Phase). 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Synthetic Route of 3290-92-4.

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

Gong, Haiyue; Hajizadeh, Solmaz; Liu, Weifeng; Ye, Lei published the artcile< Imprinted Polymer Beads Loaded with Silver Nanoparticles for Antibacterial Applications>, Application of C18H26O6, the main research area is Polymer beads Silver hydrophobic nanoparticles antibacterial; Pickering emulsion; bacteria imprinting; hydrophobic Ag nanoparticles; polyethylenimine; surface imprinting.

After the emergence of multidrug-resistant strains, antibiotic resistance in bacteria has become an important problem. Thus, materials for combating multidrug-resistant bacteria are of vital importance. In this work, we developed an antibacterial material that can selectively capture and destruct bacteria on the basis of their phys. characteristics. To achieve bacterial capture and deactivation with a single material, we used bacterial cells as templates to synthesize surface-imprinted polymer beads in bacteria-stabilized Pickering emulsions. Acrylate-functionalized polyethylenimine was used to coat the bacterial surface so that the coated bacteria can act as a particle stabilizer to establish an oil-in-water Pickering emulsion. Hydrophobic Ag nanoparticles were introduced into the oil phase composed of crosslinking monomers. Bacteria-imprinted beads (BIB) were obtained after the oil phase was polymerized Bacterial binding experiments confirmed the importance of the imprinted sites for specific recognition with the target bacteria. The Ag nanoparticles embedded inside the polymer beads enhanced bacterial inactivation and reduced the leakage of heavy metal in aquatic environment. The combination of bacteria-imprinting with delivery of general-purpose antibacterial reagents offers a useful approach toward selective capture and destruction of bacteria.

ACS Applied Bio Materials published new progress about Antibacterial agents. 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

Wang, Guang-Yua; Liu, Jun-Bob; Tang, Shan-Shanc; Chang, Hai-Bob; Jin, Rui-Fad published the artcile< Theoretical researches on the self-assembly system of molecularly imprinted polymers formed via phenobarbital and acrylamide>, Electric Literature of 3290-92-4, the main research area is phenobarbital acrylamide molecularly imprinted polymer self assembly.

For preparing the phenobarbital (PHN) molecularly imprinted polymers (MIPs) with higher adsorption and selectivity properties, we used the M062X/6-31g(d,p) method of d. functional theory to predict the various properties of PHN-MIPs. Here PHN is as the imprinted mol. and acrylamide (AM) as the functional monomer. The ethylene glycol dimethacrylate, trimethylolpropane trimethacrylate, divinyl benzene, and pentaerythritol trimethacrylate are as the crosslinking agents, resp. The acetonitrile, chloroform, toluene, and THF are used as the solvents, resp. The configurations of the mol. imprinting self-assembly system for PHN and AM have been simulated to study their bonding sites, binding energy, amount of hydrogen bond, and interaction mechanism. The essence of imprinting interaction for PHN and AM has been revealed by the at. in the mol. theory. Meanwhile, the analogs of PHN were used to discuss the selectivity property of the stable PHN-AM complex. The results show that the PHN interacts with AM through hydrogen bonds. When the imprinting molar ratio of PHN-AM is 1:6 and the THF is as the solvent, the amount of their hydrogen bonds is the most, the binding energy is the lowest, and their configuration is the most stable. In comparison with the other crosslinking agents (EGDMA, TRIM, and DVB), the PETA is more suitable for PHN-MIPs. The selective property of PHN-MIP to PHN is excellent when PHN and DMBA exist at the same time.

Chinese Journal of Structural Chemistry published new progress about Atomic charge. 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

Li, Zhong-Yuan; Sun, Wei-Feng; Zhao, Hong published the artcile< Significantly improved electrical properties of photo-initiated auxiliary crosslinking EPDM used for cable termination>, Product Details of C18H26O6, the main research area is photoinitiated auxiliary crosslinking EPDM cable termination elec property; crosslinking reaction; electrical conductance; finite element simulation; first-principles calculation; ultraviolet irradiation.

In order to achieve high quality elec. materials for cable terminations, the crosslinked ethylene-propylene-diene monomer (EPDM) materials, with adequate breakdown strength, appropriately increased conductivity and are developed by employing auxiliary crosslinker and UV photoinitiated crosslinking technique. The characteristic cyclic anhydrides with coupled carbonyl groups are utilized as auxiliary crosslinkers to promote crosslinking efficiency and provide polar-groups to EPDM mols. in UV-initiated crosslinking processes, which can be effectively fulfilled in industrial cable production The results of IR spectroscopy show that the auxiliary crosslinkers have been successfully grated to EPDM mols. through UV initiation process. The conductivity of EPDM increases after individually utilizing three auxiliary crosslinkers to EPDM at various temperatures of cable operations, by which the highest conductivity has been acquired by grafting N.N-m-phenylene dimaleimide. The first-principles calculations demonstrate that some occupied local electronic-states have been introduced in the band-gap of the EPDM crosslinked by N.N-m-phenylene dimaleimide (EPDM-HAV2), which can be thermally excited from valence band to conduction band at lower temperature or in higher d., leading to augmentation in elec. conductivity

Polymers (Basel, Switzerland) published new progress about Band gap. 3290-92-4 belongs to class esters-buliding-blocks, and the molecular formula is C18H26O6, Product Details of C18H26O6.

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