Month: December 2022

Boetje, Laura published the artcileMore efficient synthesis and properties of saturated and unsaturated starch esters, COA of Formula: C9H18O2, the main research area is synthesis property saturated unsaturated starch ester hydrophobicity contact angle; Fatty acid starch ester; Hydrophobicity; Methyl 10-undcenoate (PubChem CID: 8138); Methyl linoleate (PubChem CID: 5284421); Methyl octanoate (PubChem CID: 8091); Methyl oleate (PubChem CID: 5364509); Methyl stearate (PubChem CID: 8201); Methyl trans-2-octenoate (PubChem CID: 5364532); Methyl undecanoate (PubChem CID: 15607); Side-chain crystallinity; Thermal properties; Transesterification; Unsaturated fatty acid.

This work presents a series of starch esters synthesized via 1,5,7-triazabicyclo[4.4.0]-dec-5-ene (TBD) catalyzed transesterifications in DMSO (DMSO). The reaction was performed with saturated and unsaturated fatty acids (8, 11, and 18 carbon atoms). The degree of substitution (DS) was raised by purging the reaction flask with nitrogen instead of simply performing the reaction under a nitrogen atm. The increase of DS was most obvious for long-chain fatty acids, as an almost complete DS was observed for starch stearate (2.8) and starch oleate (2.7). The products were characterized by differential scanning calorimetry (DSC), thermogravimetric anal. (TGA), and X-ray diffraction. Starch esters from unsaturated fatty acids have a lower Tg than their saturated analogs. Moreover, contact angle and moisture uptake measurements showed increased hydrophobicity for all starch esters in comparison to pristine starch. Our results show a more efficient method for synthesizing a biobased material that steers into the direction of a material that could replace conventional plastics.

Carbohydrate Polymers published new progress about Contact angle. 111-11-5 belongs to class esters-buliding-blocks, name is Methyl octanoate, and the molecular formula is C9H18O2, COA of Formula: C9H18O2.

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

Li, Pengcheng published the artcileSynthesis and properties of the active polymer for enhanced heavy oil recovery, Related Products of esters-buliding-blocks, the main research area is alkylphenol ethoxylate active polymer enhanced heavy oil recovery.

With the continued recovery of heavy oil, conventional polymer flooding cannot be applied to heavy oil reservoirs gradually due to the characteristics of heavy oil reservoirs. To study oil displacement agent suitable for enhanced heavy oil recovery and investigate the effect of EO chain length on the performances, acrylamide, acrylic acid, lauryl methacrylate and C10-C16 alkylphenol ethoxylates were selected to co-polymerize into the active polymer PAAP-x with different EO chain length (14, 16, 18, 20 and 22). Proton NMR anal. indicated PAAP-x as the target product. The optimal EO chain length of PAAP-x was determined to be 18 by the anal. of thickening, salt-tolerance, interfacial activity, wettability, viscosity reduction and recovery. Compared with conventional polymer P1, 1500 mg/L PAAP-18 exhibited superior performances with salinity of 6882.2 mg/L: (1) PAAP-18 could maintain the viscosity of 113.1 mPa.s, while P1was 44.8 mPa.s. (2) PAAP-18 could reduce the water-oil IFT from 44.4 mN/m to 13.0 mN/m, while P1 was to 30.6 mN/m, and the water-oil contact angle was 58.2°and 108.5°, resp. (3) The heavy oil viscosity reduction rate of PAAP-18 was 81.7% at 50 °C, while P1 was only 33.8%. (4) PAAP-18 enhanced heavy oil recovery by 19.85% on the basis of water flooding while conventional polymer was only 8.69%. This study has theor. guidance and practical significance for the study on new oil displacement agent to enhance heavy oil recovery.

Colloids and Surfaces, A: Physicochemical and Engineering Aspects published new progress about Contact angle. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, Related Products of esters-buliding-blocks.

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

Ristiana, Desinta Dwi published the artcileSulfonic acid-functionalized silica with controlled hydrophobicity as an effective catalyst for esterification of levulinic acid, Name: Ethyl 4-oxopentanoate, the main research area is levulinic acid esterification sulfonic silica catalyst hydrophobicity.

As one of the essential additives in biodiesel and flavoring agents, solvents, and plasticizers in industry, Et levulinate (EL) has gained attention in the last two decades, and the global production of the compound is rapidly increased over the years. So far, esterification of biomass-derived levulinic acid (LA) with ethanol (EtOH) in the presence of highly corrosive mineral acid catalysts is the most common technique for the reaction. To avoid the harsh environment during the reaction and to ease the separation of the catalyst, the research has been recently focused on developing highly active solid acid catalysts. In this research, we have systematically investigated the catalytic activity of sulfonic acid-functionalized silica (SiO2-SO3H) with different hydrophobicity for esterification of LA with EtOH. The hydrophobicity of SiO2-SO3H was tuned by incorporating three different alkylsilanes, e.g., Me (Me), octyl (Oct), and hexadecyl (HD) silanes on the surface of the material. We found that the longer the alkyl group, the lower the acidity and thus resulted in the lower the catalytic activity. On the other hand, the particle size and hydrophobicity increase with the length in the alkyl group. SiO2-SO3H modified with the Me group (SiO2-SO3H/Me) showed the highest acidity (0.76 mmol g-1) and the highest catalytic performance (70.6% conversion). Moreover, while all alkyl-modified catalysts followed pseudo-first-order, the pseudo-first-order rate constant (k1p) for the reaction over SiO2-SO3H/Me was 5.4 x 10-3 min-1. The kinetic results of this study could be useful for reactor modeling and simulation in the future.

Materials Today Communications published new progress about Contact angle. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Name: Ethyl 4-oxopentanoate.

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

Wan, Xizi published the artcileA Wetting-Enabled-Transfer (WET) Strategy for Precise Surface Patterning of Organohydrogels, Safety of Dodecyl 2-methylacrylate, the main research area is wetting enabled transfer WET strategy precise surface patterning organohydrogel; interfacial interactions; organohydrogels; surface patterning; wetting-enabled-transfer (WET).

The ability to manipulate water and oil phases in a designable manner is of great significance in widespread fields from art paintings to materials science. However, achieving precise and stable surface patterns for two immiscible phases of water and oil remains a challenge. Herein, a general wetting-enabled-transfer (WET) strategy is reported to construct discretionary shape-defined surface patterns of organohydrogels along with their monolithic formation either from flat to curved surfaces or from the microscale to the macroscale. Locally differentiated wettability induces hydrophilic monomers and hydrophobic monomers from an emulsion system onto the wettability-matching regions of the prepatterned substrates, subsequently forming corresponding hydrogel and organogel patterns on the organohydrogel surface after in situ photopolymerization The precision of the surface patterns can be controlled by optimizing the gel monomers, emulsion droplet size, and surface chem. composition of the prepatterned substrates. This finding may provide a feasible strategy for precisely patterning functional materials from two-immiscible-phase systems.

Advanced Materials (Weinheim, Germany) published new progress about Contact angle. 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

Fernandes, Marta published the artcileBacterial cellulose and emulsified AESO biocomposites as an ecological alternative to leather, HPLC of Formula: 142-90-5, the main research area is bacterial cellulose emulsified acrylated epoxidized soybean oil hydrophobic composites; thermal mech property; acrylated epoxidized soybean oil; alternative leather; bacterial cellulose; biocomposite; emulsion; exhaustion.

This research investigated the development of bio-based composites comprising bacterial cellulose (BC), as obtained by static culture, and acrylated epoxidized soybean oil (AESO) as an alternative to leather. AESO was first emulsified; polyethylene glycol (PEG), polydimethylsiloxane (PDMS) and perfluorocarbon-based polymers were also added to the AESO emulsion, with the mixtures being diffused into the BC 3D nanofibrillar matrix by an exhaustion process. SEM and Fourier transform IR (FTIR) spectroscopy anal. demonstrated that the tested polymers penetrated well and uniformly into the bulk of the BC matrix. The obtained composites were hydrophobic and thermally stable up to 200°C. Regarding their mech. properties, the addition of different polymers lead to a decrease in the tensile strength and an increase in the elongation at break, overall presenting satisfactory performance as a potential alternative to leather.

Nanomaterials published new progress about Contact angle. 142-90-5 belongs to class esters-buliding-blocks, name is Dodecyl 2-methylacrylate, and the molecular formula is C16H30O2, HPLC of Formula: 142-90-5.

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

Xu, Liyun published the artcileStable super-hydrophobic lauryl methacrylate film fabrication on the surface of cotton fabrics in plasma-enhanced chemical vapor deposition with different duty cycles, Formula: C16H30O2, the main research area is lauryl methacrylate cotton fabric film fabrication superhydrophobicity.

In this paper, stable super-hydrophobic lauryl methacrylate (LMA) film on the surface of cotton fabrics was fabricated by a simple process of pulsed plasma-enhanced chem. vapor deposition (PECVD) with different duty cycles. The influence of duty cycles on the surface structure and properties of cotton fabrics was analyzed after a series of measurements. The results showed that water contact angles (WCAs) of samples were inversely proportional to the duty cycle values and exhibited the highest WCA (162°) at a duty cycle of 2%. The optimized washing durability of samples was obtained under the treatment of duty cycle of 25% and the WCA could still reach 127° after 15 laundering cycles. The formation of a micro-nano-composite structure and evenness of film could be observed by at. force microscopy and SEM. Nevertheless, the sample, which was treated by plasma with a 25% duty cycle, had the best uniformity of film deposition. The results of attenuated total reflection Fourier transform IR spectroscopy and XPS illustrated that the LMA monomer was grafted and deposited on the surface of cotton fabrics successfully in covalent binding after PECVD treatment, and this was supposed to be the cause of the washing stability of the films. The results indicated that cotton fabrics modified with the proposed method can exhibit excellent super-hydrophobicity and washing durability, while the duty cycle was an appreciable effect factor in the modification.

Textile Research Journal published new progress about Contact angle. 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

Chen, Xinwei published the artcileDesigning nanoporosity in a swollen polymer for the controlled release of a highly volatile fragrance, Product Details of C9H10O2, the main research area is nanoporosity swollen polymer highly volatile fragrance.

Controlling the fragrance release profile, especially the highly volatile top note, can prolong the desired scent of the fragrance. Here, the porosity of a swollen cross-linked polyurethane acrylate (PUA) polymer, which is tuned by the length of a modulator, can influence the evaporation rate of the top note. In particular, the evaporation rate of benzyl acetate (BA), a common top note, is reduced by a factor of 6.5 (from 134 to 17 mg m-2 min-1) when BA is released from the best-performing PUA against a reservoir of BA. The average diameter of an opening in the fragrance-loaded PUA is � nm, as determined by the thermoporosimetry approach. Such a pore size can effectively control the evaporation rate of BA, as predicted by the theor. model, which reveals that a pore diameter of <16 nm is required. Computational modeling reveals the optimal chain length for a modulator used for the sustained released of fragrance, confirming the exptl. data. Finally, BA continues to be released from the PUA matrix for a prolonged period, even after 3 mo, whereas the same quantity of BA would completely evaporate after 1 wk in the absence of PUA matrix. Approx. 50wt% of BA remains after 60 days, making it one of the best techniques in sustaining the release of a top note. Flavour and Fragrance Journal published new progress about Contact angle. 140-11-4 belongs to class esters-buliding-blocks, name is Benzyl acetate, and the molecular formula is C9H10O2, Product Details of C9H10O2.

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

Zhang, Rui published the artcileA facile strategy toward hydrophobic-oleophilic 3D Fe foam for efficient oil-water separation, Safety of Dodecyl 2-methylacrylate, the main research area is iron foam dodecyl mercaptan coating separator wastewater treatment.

In this work, we present a hydrophobic-oleophilic Fe foam for oil-water separation Hydrophobic-oleophilic Fe foam was fabricated simply through dip-coating with n-dodecyl mercaptan. The morphol., chem. composition and water contact angle of the Fe foam were characterized. The Fe foam could absorb a variety of oils, such as diesel, toluene, xylene, cyclohexane, dodecyl methacrylate, crude oil, 1,2-dichloroethane, hexane and chloroform, these oils could be underwater or on water surface, and it exhibited excellent durability, verified by the high separation efficiency (more than 98.8% for a cyclohexane-water mixture) after reusing for 48 times. Furthermore, oil collection with the Fe foam could be controlled remotely using external magnetic field, and the Fe foam displayed high flux, good anti-corrosion and wear resistance. The simple and low-cost fabrication method enabled the Fe foam to be a promising candidate for large-scale oil-water separation and for remotely controllable water purification

Journal of Materials Science published new progress about Contact angle. 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

Fan, Mengjiao published the artcileSwitching production of γ-valerolactone and 1,4-pentanediol from ethyl levulinate via tailoring alkaline sites of CuMg catalyst and hydrogen solubility in reaction medium, Computed Properties of 539-88-8, the main research area is pentanediol gamma valerolactone production ethyl levulinate copper magnesium catalyst.

γ-Valerolactone (GVL) and 1,4-pentanediol (1,4-PeD) are the biomass-derived chems. with the tunable functionalities, serving as the platform for synthesis other value-added product. In this study, we have demonstrated that the production of GVL and 1,4-PeD from Et levulinate (EL), a product from alcoholysis of biomass, could be switched flexibly via tailoring the copper content and abundance of the basic sites in the CuMg catalyst and the reaction medium, achieving the yields up to 99% and 97.7% under optimal exptl. condition. The production of GVL was favored over the CuMg catalyst with the high Cu content, while the abundant basic sites in the CuMg catalyst were the key for further opening of the furan ring in GVL to form 1,4-PeD. Furthermore, the alc. solvent especially isopropanol with the higher hydrogen solubility also facilitated the production of 1,4-PeD. Water as the reaction medium induced significant sintering of Cu in CuMg catalyst, while the alc. solvent could effectively suppress the aggregation of copper species, maintaining the high catalytic stability.

Molecular Catalysis published new progress about Chemisorption. 539-88-8 belongs to class esters-buliding-blocks, name is Ethyl 4-oxopentanoate, and the molecular formula is C7H12O3, Computed Properties of 539-88-8.

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

Kong, Jun published the artcileChemical Kinetics Study on Combustion of Ethanol/biodiesel/n-heptane, Recommanded Product: Methyl decanoate, the main research area is methyl decanoate n heptane ethanol production numerical simulation.

Me decanoate (MD), methyl-9-decanoate (MD9D), and n-heptane (H) as alternative blends of biodiesel (B) were used to build a detailed chem. kinetic mechanism containing 3,324 components and 11,053 elementary reactions. This condition verifies that the ignition delay time of the detailed mechanism in the experiment conditions is reasonable. MD and MD9D will produce methyl-2-palmitate (MP2D) and finally be dehydrogenated as CH2O. Furthermore, R4 (O + H2O→OH + OH) and R228 (CH2CHO + O2→CH2O + CO + OH) are the key reactions, which will influence the ignition delay and heat release. According to the simulation result, the rate of BH (the volume ratio of the biodiesel/n-heptane mixture is fixed at 20%/80%) in constant volume bomb (Cetane Ignition Delay 510, CID 510) is the highest. However, with the development of ethanol, the rates decreased. The reactors of BHE5 (BHE5 refers to a blend of 5% ethanol and 95% biodiesel/n-heptane) have the highest rate among the ethanol blends. In addition, the reaction rate of the intermediate substance of ketohydroperoxide (KHP) in a modified cooperative fuel research engine (CFR) during combustion decreased with ethanol addition However, the KHP rate of BHE15 (BHE15 refers to a blend of 15% ethanol and 85% biodiesel/n-heptane) and BHE20 (BHE20 refers to a blend of 20% ethanol and 80% biodiesel/n-heptane) is similar, causing the closed onset of low-temperature heat release. The rate of CH2O and MP2D of BH is the highest over the others in CID 510. The rate of CH2O and MP2D of BHE5 is lower than that of BHE10 (BHE10 refers to a blend of 10% ethanol and 90% biodiesel/n-heptane), BHE15, and BHE20.

Renewable Energy published new progress about Cetane number. 110-42-9 belongs to class esters-buliding-blocks, name is Methyl decanoate, and the molecular formula is C11H22O2, Recommanded Product: Methyl decanoate.

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