Month: December 2022

Sprakel, Lisette M. J. published the artcileImproving understanding of solvent effects on intermolecular interactions in reactive liquid-liquid extraction with Isothermal Titration Calorimetry and molecular modeling, Category: alcohols-buliding-blocks, the main research area is trioctylamine acetic acid solvent effect intermol interaction liquid extraction.

Isothermal Titration Calorimetry (ITC) and mol. modeling (MM) were combined with liquid-liquid equilibrium data to obtain better understanding of solvent effects on complexation in reactive liquid-liquid extraction Two examples with ample extraction literature available were studied, acetic acid extraction and phenol extraction Interactions with binary solvents were studied. Based on the insight and quantification of complexation with MM and ITC, models describing the liquid-liquid equilibrium (LLE) were formulated and validated with experiments, showing that ITC can predict LLE. ITC together with MM indeed can yield addnl. insight in complexation behavior in reactive liquid-liquid extraction and may guide solvent selection procedures.

Journal of Industrial and Engineering Chemistry (Amsterdam, Netherlands) published new progress about Binary solutions. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sadeghi, Sayed Ali Mirmohammad published the artcileSelf-healing performance of hybrid core-shell nanofibers mat containing epoxy-mercaptan at subroom temperature, Formula: C17H28O8S4, the main research area is epoxy mercaptan core shell nanofiber mat self healing performance.

Self-healing epoxy composite working at subroom temperature could be useful in aerospace industry and wind turbine blades. In this research, hybrid core-shell nanofibers mat containing epoxy resin and mercaptan was embedded in epoxy matrix to investigate repeated self-healing ability of the fabricated composite at subroom temperature (10°C). The results of three-point bending test illustrated that the release of epoxy resin and mercaptan into cracks and curing reaction between them could restore flexural properties of the composite. In fourth bending cycle, flexural modulus of composite reinforced by hybrid mat and unreinforced epoxy (without nanofiber) was reduced 6% and 24%, resp. In addition, hybrid mat reinforced composite was broken at fifth bending cycle, whereas for unreinforced epoxy specimen occurred at fourth bending cycle. Non-isothermal differential scanning calorimetry thermograms after each three-point bending cycle of hybrid mat reinforced composite showed an exothermic peak centered about 64°C. This peak is related to epoxy and mercaptan reaction that could confirm self-healing ability of hybrid core-shell nanofibers mat. Extraction results, FTIR anal., and three-point bending test showed the stability of epoxy and mercaptan into nanofibers during 8 mo.

Polymer Composites published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Post, Wouter published the artcileSelf-healing glass fiber reinforced polymer composites based on montmorillonite reinforced compartmented alginate fibers, Computed Properties of 7575-23-7, the main research area is self healing glass fiber epoxy composite montmorillonite alginate fiber; healing agent carrier mech property.

This study shows the feasibility of clay-reinforced alginate-based compartmented fibers as healing agent carriers for the autonomous healing of glass fiber-reinforced polymer composites. First we report on the effect of montmorillonite (MMT) clay on the fiber tensile and vacuole lateral compression properties. It is found that the fiber tensile properties are enhanced with increasing MMT concentration, while the effects on the vacuole lateral compression properties are seemingly negligible. The second part of this work shows the proof of concept of healing by compartmented fibers in glass fiber-reinforced polymer (GFRP) composites. A single- and a double-healing agent configuration, both based on epoxy-thiol chem., were compared in these model GFRP composites. The healing phenomena were quantified by mech. characterization (interlaminar fracture and flexural testing) and nondestructive testing techniques (X-ray microtomog. and air-coupled ultrasonic C-scanning). It is found that a configuration with one healing agent is favorable over a system with two sep. agents and that further exploitation of the compartmented fiber concept should focus on the healing of matrix damage as the loss of mech. integrity because of glass fiber fracture cannot be overcome.

Polymer Composites published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jia, Ziyang published the artcileEffects of isomalt on the quality of wheat flour dough and spicy wheat gluten sticks, Related Products of alcohols-buliding-blocks, the main research area is wheat flour dough gluten stick isomalt.

The effects of different isomalt concentrations on the quality of wheat flour dough and spicy wheat gluten sticks (SWGS) were evaluated at the phys., structural and mol. levels. The results showed that the radial expansion rate (RER) and oil absorption rate (OAR) of SWGS increased first and then decreased with increased isomalt supplementation, which reached the maximum at 3 wt%. The pasting properties of wheat starch also changed, and the peak viscosity, breakdown and setback were decreased with the addition of isomalt. Dynamic rheol. properties results showed that the storage modulus (G) and loss modulus (G) increased with the addition of isomalt, which may be attributed to the reinforcement of gluten network structure by hydrogen bonding of isomalt. SEM (SEM) images illustrated that the SWGS surface becomes smooth and the broken gluten structure was reduced after the addition of different isomalt levels compared with the control group. Overall, the wheat flour dough quality anal. showed that the addition of isomalt could generate a close binding with wheat starch and protein and further strengthen the internal structure of gluten through isomalt hydrogen bonds.

International Journal of Food Science and Technology published new progress about Bending strength. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Li published the artcileDelayed Thiol-Epoxy Photopolymerization: A General and Effective Strategy to Prepare Thick Composites, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is delayed thiol epoxy photopolymerization thick nanocomposite prpen.

Photoinduced thiol-epoxy click polymerization possesses both the characteristics and advantages of photopolymerization and click reactions. However, the photopolymerization of pigmented or highly filled thiol-epoxy thick composites still remains a great challenge due to the light screening effect derived from the competitive absorption, reflection, and scattering of the pigments or functional fillers. In this article, we present a simple and versatile strategy to prepare thick composites via delayed thiol-epoxy photopolymerization The irradiation of a small area with a light-emitting diode (LED) point light source at room temperature leads to the decomposition of a photobase generator and the released active basic species can uniformly disperse throughout the whole system, including unirradiated areas, via mech. stirring. No polymerization was observed at room temperature and therefore the liquid formulations can be further processed with molds of arbitrary size and desired shapes. It is only by increasing the temperature that base-catalyzed thiol-epoxy polymerization occurs and controllable preparation of thick thiol-epoxy materials can be achieved. The formed networks display excellent uniformity in different radii and depths with comparable functionality conversions, similar Tg values, and thermal decomposition temperatures The presented strategy can be applied to prepare thick composites with glass fibers possessing improved mech. properties and dark composites containing 2 weight % carbon nanotubes.

ACS Omega published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Boxue published the artcileResearch on electrospinning thermosetting-thermoplastic core-shell nanofiber for rapid self-healing of carbon fiber/epoxy composites, Computed Properties of 7575-23-7, the main research area is thermosetting thermoplastic core shell nanofiber carbon fiber epoxy composite; electrospinning mech self healing property.

This work fabricated rapid self-healing carbon fiber/epoxy composites based on the thermosetting-thermoplastic core-shell nanofiber to improve the healing efficiency and healing responsiveness of self-healing composites. The core-shell nanofiber was prepared by coaxial electrospinning on the premise that the melting temperature of thermoplastic copolyamide (PA) shell matched the curing temperature of encapsulated epoxy healing agent. Upon interlaminar fracture, the melting PA shell ruptured and released all core at healing temperature The thermal expansion of PA provided an addnl. driving force for healing. Therefore, the core-shell acted together as healing agent and rapidly fill the damaged region, realizing the full healing potential. The incorporation of core-shell nanofiber enhanced the bending strength by 16.11%, and the damaged composites achieved 89.96% recovery after healing for 20 min at 130 °C. The delamination surfaces showed the toughening and healing mechanisms of core-shell nanofiber. Moreover, the effect of deposition time on healing efficiency was discussed in detail.

Composites Science and Technology published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Hongyan published the artcileImproving the Physical-Mechanical Property of Dental Composites by Grafting Methacrylate-Polyhedral Oligomeric Silsesquioxane onto a Filler Surface, Synthetic Route of 7575-23-7, the main research area is dental composite methacrylate polyhedral oligomeric silsesquioxane filler surface; MA-POSS; dental resin composite; hybrid particles; interfacial interaction; physical−mechanical property.

Endowing dental composites with excellent interfacial bonding through filler surface modification is pivotal to improve the phys.-mech. property and prolong the life of composite fillings. In this study, methacrylate-polyhedral oligomeric silsesquioxane (MA-POSS) acts as a “”mol. bridge”” between the commonly used SiO2 particles and the methacrylate-based resin matrix via a thiol-ene click reaction to construct MA-POSS/SiO2 (p-SiO2) hybrid particles. Synthesized p-SiO2 exhibited the roughest surface morphol. and had more polymerizable groups, in comparison with SiO2 and silanized SiO2. Furthermore, the p-SiO2 particles were used as a reinforcement to fabricate bisphenol A glycerolate dimethacrylate/tri(ethyleneglycol) dimethacrylate-based dental composites, where the SiO2- and silanized SiO2-filled composites served as the control groups, and the filler loading was fixed at 65 weight %. Results of the mech. properties indicated that the hybrid p-SiO2 particles significantly improved the flexural strength, flexural modulus, compressive strength, and work of fracture of dental composites, giving improvements of 251.2, 17.89, 122.3, and 1094%, resp., over the SiO2-filled composites due to the strong interfacial interaction between the resin matrix and p-SiO2. Addnl., this optimal p-SiO2-loaded composite also presented better polymerization shrinkage, acceptable degree of conversion, curing depth, and cell viability. Grafting of MA-POSS onto a filler surface is a promising filler surface modification to improve the resin matrix/filler interfacial interaction, leading to the enhanced overall performance of composites.

ACS Biomaterials Science & Engineering published new progress about Bending strength. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Synthetic Route of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Haili published the artcileCharacterization of key odor-active compounds in thermal reaction beef flavoring by SGCxGC-O-MS, AEDA, DHDA, OAV and quantitative measurements, Computed Properties of 505-10-2, the main research area is furanthiol methylbutanal beef flavoring extraction mass spectrometry gas chromatog.

Thermal reaction beef flavoring is a kind of food additive. In this study, three extraction methods of dynamic headspace sampling (DHS), solid phase micro-extraction (SPME) and liquid-liquid extraction (LLE) combined with switchable two-dimensional gas chromatog.-olfactometry-mass spectrometry (SGCxGC-O-MS) were employed to characterize volatile compounds in thermal reaction beef flavoring. The odor characteristics of thermal reaction beef flavors were identified by sensory evaluation, aroma extraction dilution anal. (AEDA), dynamic headspace dilution anal. (DHDA), odor activity value (OAV) and quant. measurements. A total of 231 volatile odor compounds were identified by the three extraction methods, which including 15 aldehydes, 41 ketones, 29 alcs., 27 esters, 13 furans, 20 pyrazines, 9 sulfur-containing compounds, 18 thiophenes and thiazoles, 19 acids and 40 other compounds Ninety-eight compounds had odor activity, and 22 odor-active compounds were quant. analyzed. 2-Methyl-3-furanthiol (meaty) and bis(2-methyl-3-furanyl) disulfide (onion) had the higher FD and OAV, 3-methylbutanal (chocolate) was first identified as the key odor-active compound in thermal reaction beef flavoring, Me furfuryl disulfide (meaty), 2-ethyl-3,5-dimethylpyrazine (roasted nuts), 2,3-butanedione (caramel), linalool (floral), furfural (baked bread), 2-furfurylthiol (sulfury) and other compounds were also identified as the key aroma components in thermal reaction beef flavoring. The results showed that SPME and DHS were more suitable than LLE for the separation and extraction of volatile odor compounds in thermal reaction beef flavoring, and there were some masking and synergistic effects between odor-active compounds

Journal of Food Composition and Analysis published new progress about Beef (flavoring). 505-10-2 belongs to class alcohols-buliding-blocks, name is 3-(Methylthio)propan-1-ol, and the molecular formula is C4H10OS, Computed Properties of 505-10-2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Yuan, Jialiang published the artcileAn integrated cathode and solid electrolyte via in situ polymerization with significantly reduced interface resistance, Category: alcohols-buliding-blocks, the main research area is PVDF HFP battery cathode solid electrolyte thermal stability.

Reducing the interfacial resistance between solid electrolytes and electrodes is critical for developing high-energy d. solid-state batteries. In the present study, a simple strategy of designing an integrated cathode and solid electrolyte (ICSE) to avoid a contact interface is proposed and successfully fulfilled with the help of UV curving. Firstly, a porous polymer film (PVDF-HFP/PVDF) was formed on the surface of the porous LiFePO4 electrode via PVP dissolution Secondly, curable monomers, including PEGDA/PETMP/TFEMA, were filled into the porous membrane via infiltration and concentration Lastly, the ICSE was obtained via curing with UV light. The as-prepared LiFePO4//ICSE//Li solid battery displays excellent electrochem. performance with a high reversible capacity of 153 mA h g-1 and a capacity of over 140 mA h g-1 was retained after 150 cycles at 0.1C and 25°C. This ICSE strategy may effectively contribute to the practical application of all-solid-state batteries.

Chemical Communications (Cambridge, United Kingdom) published new progress about Battery cathodes. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Seyfi, Roxana published the artcileIsolation and structural characterization of a polysaccharide derived from a local gum: Zedo (Amygdalus scoparia Spach), Application of (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, the main research area is local gum polysaccharide structural property.

In this study, a novel polysaccharide was isolated from a local gum, zedo (Amygdalus scoparia Spach). Chem. composition of the gum and elemental anal. of the isolated polysaccharide were determined The polysaccharide and its fragments were examined by gas chromatog.-mass spectrometry, GC-MS, viscometry, 1H NMR, and13CNMR spectroscopy. Results obtained from different methods, revealed that a hetero-polysaccharide is the main component of the gum. The amounts of moisture, minerals, protein and lipid were 9.42, 2.23, 1.05, and 0.03 (weight/weight %), resp. The amounts of carbon, hydrogen, oxygen and nitrogen obtained from elemental anal. were 38.5, 5.8, 35.3, and 0.3 (weight/weight %), resp. The presence of arabinose, galactose, rhamnos, mannose, β- D-glucose, fructose, galacturonic and glucuronic acids residues were measured by GC-MS anal. However, conversion of glucose into fructose probably occurred during the anal., because the temperature of the anal. is high enough. Both carboxylic groups and minerals/salts had a major influence on the rheol. properties of the gum. The gum exhibited polyelectrolyte behavior, and its solutions did not follow Newtonian flow behavior. It can be naturally occurred as an anionic polysaccharide. The gum was a highly branched polysaccharide and a member of arabinogalactans family. The main chain contains α- L-arabinofuranosyl, α- L-Araf, and β-D-galactopyranonyl, β-D-Galp, units. The following residues were identified: → 3,4) β-D-Galp (1→; → 3,4,6) β-D-Galp (1→; →3)- α- L-Araf-(1→; → 4) β-D-GlcpA (1 → .; glucosyl residues; and α-L- Rhap, (1 → . Terminal residues were: α-L- Rhap; and α- L-Araf.

Food Hydrocolloids published new progress about Arachis hypogaea. 59-23-4 belongs to class alcohols-buliding-blocks, name is (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, and the molecular formula is C6H12O6, Application of (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts