Tag: M.W=400-500

Sheima, Yauhen published the artcileArtificial Muscles: Dielectric Elastomers Responsive to Low Voltages, Product Details of C17H28O8S4, the main research area is dielec elastomer permittivity thin film actuator artificial muscle; dielectric elastomer actuators; high permittivity elastomers; high permittivity polysiloxanes; thin films; thiol-ene addition.

The lack of soft high-dielec.-permittivity elastomers responsive to a low voltage was a long-standing obstacle for the industrialization of dielec. elastomer actuators (DEA) technol. Here, elastomers that not only possess a high dielec. permittivity of 18 and good elastic and insulating properties but are also processable in very thin films by conventional techniques are reported. Addnl., the elastic modulus can be easily tuned. A soft elastomer with a storage modulus of E = 350 kPa, a tan δ = 0.007 at 0.05 Hz, and a lateral actuation strain of 13% at 13 V μm-1 is prepared A stable lateral actuation over 50,000 cycles at 10 Hz is demonstrated. A stiffer elastomer with an E = 790 kPa, a tan δ = 0.0018 at 0.05 Hz, a large out-of-plane actuation at 41 V μm-1, and breakdown fields of almost 100 V μm-1 is also developed. Such breakdown fields are the highest ever reported for a high-permittivity elastomer. Addnl., actuators operable at a voltage ≥200 V are also demonstrated. Because the materials used are cheap and easily available, and the chem. reactions leading to them allow upscaling, they have the potential to advance the DEA technol.

Macromolecular Rapid Communications published new progress about Actuators. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Product Details of C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Song, Yanjiao published the artcileControllable, bidirectional water/organic vapors responsive actuators fabricated by one-step thiol-ene click polymerization, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is controllable bidirectional water organic vapor responsive actuator; one step thiol ene click polymerization; one-step processes; polymeric actuators; substrate induction; thiol-ene click polymerization.

This work reports a facile, one-step thiol-ene click polymerization strategy for preparation of water/acetone vapor-responsive hierarchical films, by using diallyl terephthalate (P) as hydrophobic ene-monomer, 1,4-diallyl-1,4-diazabicyclo [2.2.2]octane-1,4-diium bromide (B) as hydrophilic ene-monomer, and pentaerythritol tetra(3-mercaptopropionate) (PETMP) as thiol monomer. Besides, by taking advantage of the specific hydrophilic/hydrophobic induction effect of substrate and adjusting the molar ratio of P to B, P60B40-HPI film is fabricated on hydrophilic substrate “”with plasma treatment”” whereas P80B20-HPO film is obtained on hydrophobic substrate “”without plasma treatment””. Their “”upper-dense and lower-porous”” structural feature ensured the excellent combination of fast stimuli-response speed endowed by the porous structure and good mech. strength enhanced by the upper dense surface. Both films are bidirectional water/acetone vapor-responsive materials, but their bending directions responding to the stimuli factors are completely opposite. This strategy showed great potential in the development of smart stimuli-responsive materials.

Macromolecular Rapid Communications published new progress about Actuators. 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

Abakeviciene, Brigita published the artcileFree-standing composite films based on thiol-ene and PEDOT: PSS layers for optoelectronic applications, Category: alcohols-buliding-blocks, the main research area is poly ethylenedioxythiophene styrenesulfonate composite film optoelectronic application; PEDOT:PSS; PETMP-TTT; composite; free-standing film; layers; mechanical properties.

Free-standing composite films were fabricated by combining the plane parallel layers of thiol-ene based on pentaerythritol tetrakis(3-mercaptopropionate)-1,3,5-triallyl-1,3,5-triazine-2,4,6(1H,3H,5H)-trione (PETMP-TTT) UV curable polymer and poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) conductive polymer. A systematic anal. was performed with the focus on mech. performance of the free-standing composite films. The PEDOT:PSS/PETMPTTT composite exhibited higher values of adhesion force compared to the free-standing PETMP-TTT film due to hydrophilic nature of the PEDOT:PSS layer. The composite was found to be highly transparent in the range of 380-800 nm. The Young’s modulus and tensile strength of PETMP-TTT were found to be 3.6 ±0.4 GPa and 19± 3 MPa, while for PEDOT:PSS/PETMP-TTT to be 3.5± 0.3 GPa and 20± 3 MPa, resp. The sheet resistance values of the PEDOT:PSS layer in the composite film were found to be highly stable after a number of bending iterations with slight increase in sheet resistance from 108 to 118 ± 2 Ω/Ω. The resultant PEDOT:PSS/PETMP-TTT composite can be further used in optoelectronic applications.

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

Hoeglund, Martin published the artcileFacile Processing of Transparent Wood Nanocomposites with Structural Color from Plasmonic Nanoparticles, SDS of cas: 7575-23-7, the main research area is facile processing transparent wood nanocomposite structural color plasmonic nanoparticle.

Wood is an eco-friendly and abundant substrate and a candidate for functionalization by large-scale nanotechnologies. Infiltration of nanoparticles into wood, however, is hampered by the hierarchically structured and interconnected fibers in wood. In this work, delignified wood is impregnated with gold and silver salts, which are reduced in situ to plasmonic nanoparticles via microwave-assisted synthesis. Transparent biocomposites are produced from nanoparticle-containing wood in the form of load-bearing materials with structural color. The coloration stems from nanoparticle surface plasmons, which require low size dispersity and particle separation Delignified wood functions as a green reducing agent and a reinforcing scaffold to which the nanoparticles attach, predesigning their distribution on the surface of fibrous “”tubes””. The nanoscale structure is investigated using scanning transmission electron microscopy (STEM), energy-dispersive spectroscopy (EDS), and Raman microscopy to determine particle size, particle distribution, and structure-property relationships. Optical properties, including response to polarized light, are of particular interest.

Chemistry of Materials published new progress about Balsa wood. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Zhang, Yijia published the artcileColloidal Capsules Assembled from Gold Nanoparticles Using Small-Molecule Hydrophobic Cross-linkers, Application of Pentaerythritol tetra(3-mercaptopropionate), the main research area is gold nanoparticle crosslinker colloidosome.

Colloidal capsules (or colloidosomes) have been studied for various applications such as therapeutic agent encapsulation, photothermal therapy, imaging, and energy storage. Emulsion-based synthesis is the most common approach for preparing colloidal capsules as it is relatively straightforward and scalable. However, while the initial formation requires only introducing the colloidal subunits into an emulsion and letting them assemble at the interface, a second step is required in order to prepare stable, covalently linked colloidal capsules, and preparing submicron colloidal capsules is quite challenging. Here, we describe a simple and quick one-step method to synthesize covalently linked, stable nanoscale colloidal capsules consisting of gold nanoparticles (NPs) (AuNP) and thiol-containing cross-linkers. Gold nanoparticle capsules (AuNCs) were formed by coating emulsion droplets containing thiol-containing cross-linkers with citrate-stabilized AuNPs. The physicochem. properties of the colloidal capsules can be tailored by changing the building blocks. In order to demonstrate this, colloidal capsules were assembled from AuNPs ranging from 5 to 20 nm in size. The use of the larger 20 nm starting particles resulted in AuNCs with a sufficiently pronounced red shift for λmax to be suitable for biol. photothermal applications, where use of a near-IR laser is strongly preferred. The AuNCs were found to be biocompatible and stable in cell culture conditions and to provide moderate heating. This demonstrates the modularity of the synthesis and the potential advantages of a one-step synthesis to prepare nanoscale gold colloidal capsules.

Langmuir published new progress about Aggregates. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Guzman, Dailyn published the artcileFully renewable thermosets based on bis-eugenol prepared by thiol-click chemistry, SDS of cas: 7575-23-7, the main research area is fully renewable thermoset bis eugenol thiol click chem.

Thiol-ene photocuring and thiol-epoxy thermal curing have been applied to prepare new thermosets from renewable substrates. As monomers, a tetrallyl and a tetraepoxy derivative of bis-eugenol were prepared by dimerization of eugenol, allylation and further epoxidation These compounds were reacted with a com. available tetrathiol, PETMP, and thiols synthesized from two natural resources as squalene (6SH-SQ) and eugenol (3SH-EU) in photoinitiated and thermal conditions. The reaction process was studied by calorimetry, and the materials obtained were characterized by thermogravimetry, thermomech. studies and mech. testing. Thiol-epoxy materials showed a better mech. performance than thiol-ene photocured thermosets. This new epoxy monomer of renewable origin allowed to prepare materials with final properties better than those obtained from the diglycidylether of bisphenol A, owing to the high functionality of bis-eugenol and its rigid and compact structure.

Reactive & Functional Polymers published new progress about Allylation. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Coste, Guilhem published the artcileNon-isocyanate polyurethane foams based on six-membered cyclic carbonates, Quality Control of 7575-23-7, the main research area is nonisocyanate polyurethane foam membered cyclic carbonate.

Polyurethane foams currently dominate the global foam market. Nevertheless, the main drawback of these foams remains the use of toxic isocyanate reagents. To overcome this issue, several ways have been explored. The most promising route appears to be the aminolysis of 5-membered cyclic carbonates leading to formation of polyhydroxyurethanes (PHUs). However, the lack of reactivity of systems using C5-cyclic carbonates currently limits the application range of PHUs. Hence, this study reports the first synthesis of PHUs foams using a new tetrafunctional 6-membered cyclic carbonate (TC6). The TC6 was reacted with different diamines under catalyst-free and mild temperature conditions in presence of a chem. blowing agent. Three different amines were employed, allowing access to various foams properties. Finally, promising flexible foams have been obtained, with interesting properties that could make them possible new candidates for applications as seating or insulation mattresses.

European Polymer Journal published new progress about Aminolysis. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Barnes, Morgan published the artcileDirect shape programming of liquid crystal elastomers, Quality Control of 7575-23-7, the main research area is liquid crystal elastomer shape programming.

Liquid crystal elastomers (LCEs) are shape morphing materials promising for many applications including soft robotics, actuators, and biomedical devices, but current LCE synthesis techniques lack a simple method to program new and arbitrary shape changes. Here, we demonstrate a straightforward method to directly program complex, reversible, non-planar shape changes in nematic LCEs. We utilize a double network synthesis process that results in a competitive double network LCE. By optimizing the crosslink densities of the first and second network we can mech. program non-planar shapes with strains between 4-100%. This enables us to directly program LCEs using mech. deformations that impart low or high strains in the LCE including stamping, curling, stretching and embossing methods. The resulting LCEs reversibly shape-shift between the initial and programed shape. This work widens the potential application of LCEs in biomedical devices, soft-robotics and micro-fluidics where arbitrary and easily programed shapes are needed.

Soft Matter published new progress about Anisotropy. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Esen, Cansu published the artcileThiol-ene polymer beads via liquid-liquid printing: armored interfaces and photopolymerization via graphitic carbon nitride, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is carbon nitride polymer bead thiol ene photopolymerization.

Polymerization of multifunctional thiol-ene mols. is attractive as a proof of concept in photopolymerization, yet the formation of a bead structure is highly restricted. This manuscript will show graphitic carbon nitride based liquid-liquid printing and subsequent photopolymerization to form thiol-ene polymer beads with extreme simplicity and potential scalability.

Nanoscale Advances published new progress about Adsorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Name: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sun, Chang published the artcileImitated Core-Shell Molecularly Imprinted Membranes for Selective Separation Applications: A Synergetic Strategy by Polydopamine and SiO2, Quality Control of 7575-23-7, the main research area is silica polydopamine core shell molecularly imprinted membrane selective separation.

Development of high-efficiency separation materials with specific recognition sites has become an urgent and important task. Herein, a synergetic strategy based on polydopamine (pDA) and silicon dioxide nanoparticles (SiO2) was successfully designed and developed for the preparation of imitated core-shell-based cloxacillin-imprinted nanocomposite membranes (ICCIMs-D/S). Cloxacillin (Col) was selected as the template resulting from the potential threat to environment and human health. As to the synthesis procedure of ICCIMs-D/S, the pDA-modified layers were uniformly loaded onto substrate membranes by developing an elevated phase transformation method. Based on it, the synergy processes of pDA and SiO2 could be achieved on surface of porous membranes. The ICCIMs-D/S with Col-imprinted recognition sites were finally synthesized by the photo-initiated “”mercapto-alkenes click chem.”” method using methacrylic acid as functional monomers. Notably, the satisfactory rebinding selectivity (α>4.0) and permselectivity (β>4.0) with outstanding regeneration performance (only 5.11% decrease after ten regeneration cycles) indicated the superior selectivity and stability of the as-obtained ICCIMs-D/S. The preparation strategy and ICCIMs-D/S developed in this work is expected to provide a feasible idea for selective separation of Col from wastewater.

Journal of the Taiwan Institute of Chemical Engineers published new progress about Adsorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Quality Control of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts