Tag: M.W=400-500

Ma, Zongwen published the artcileCrosslinkable and Chelatable Organic Ligand Enables Interfaces and Grains Collaborative Passivation for Efficient and Stable Perovskite Solar Cells, SDS of cas: 7575-23-7, the main research area is perovskite solar cell crosslinkable chelatable organic ligand passivation; chemical anchoring; collaborative interface-grain engineering; in situ crosslinking; perovskite solar cells; stability.

The organic-inorganic halide perovskite solar cell (PerSC) is the state-of-the-art emerging photovoltaic technol. However, the environmental water/moisture and temperature-induced intrinsic degradation and phase transition of perovskite greatly retard the commercialization process. Herein, a dual-functional organic ligand, 4,7-bis((4-vinylbenzyl)oxy)-1,10-phenanthroline (namely, C1), with crosslinkable styrene side-chains and chelatable phenanthroline backbone, synthesized via a cost-effective Williamson reaction, is introduced for collaborative electrode interface and perovskite grain boundaries (GBs) engineering. C1 can chem. chelate with Sn4+ in the SnO2 electron transport layer and Pb2+ in the perovskite layer via coordination bonds, suppressing nonradiative recombination caused by traps/defects existing at the interface and GBs. Meanwhile, C1 enables in situ crosslinking via thermal-initiated polymerization to form a hydrophobic and stable polymer network, freezing perovskite morphol., and resisting moisture degradation Consequently, through collaborative interface-grain engineering, the resulting PerSCs demonstrate high power conversion efficiency of 24.31% with excellent water/moisture and thermal stability. The findings provide new insights of collaborative interface-grain engineering via a crosslinkable and chelatable organic ligand for achieving efficient and stable PerSCs.

Small published new progress about Chelation. 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

Yang, Jeh-Chang published the artcileOn the nature of shape-fixing in semicrystalline shape-memory networks, Formula: C17H28O8S4, the main research area is phenolthiazine reinforced polymer composite shape memory network mech property.

Crystallization of polymer strands within elastically strained cross-linked networks can lower tension, leading to stabilization of mech. deformed states. This process, referred to as shape-fixing, is sensitive to thermomech. path because both mech. strain and thermal undercooling affect crystallization kinetics. In the present study, shape-fixing of a well-defined poly(caprolactone) network is examined at fixed strains ranging from 25 to 100%. Isothermal crystallization kinetics were studied using wide angle X-ray scattering while simultaneously monitoring tension loss. Plots of tensile stress vs. degree of crystallization show that significant stress reduction occurs at only a few percent crystallinity (<0.05). The development of young's modulus under identical conditions was evaluated, and results are combined to estimate the shape-fixity at different crystallization conditions and times. This study contributes to understanding the interrelationship between crystallization, stress reduction, and material stiffening to support further development of semicrystalline shape-memory networks. Polymer Crystallization published new progress about Annealing. 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

Ford, Michael J. published the artcileSize of liquid metal particles influences actuation properties of a liquid crystal elastomer composite, Category: alcohols-buliding-blocks, the main research area is metal particle actuation property liquid crystal elastomer composite.

Composites of liquid crystal elastomer (LCE) that are elec. conductive have the potential to function as soft “”artificial muscle”” actuators that can be reversibly stimulated with elec. Joule-heating. Conductivity can be achieved by embedding the LCE with droplets of an alloy of gallium and indium that is liquid at room temperature These soft artificial muscles are capable of >50% reversible actuation with an applied load. The key to actuation at high loadings of liquid metal (LM) is that the droplets deform with the surrounding matrix. By controlling the size of LM droplets through simple processing techniques, we show that the actuator properties of the LM-LCE muscle can be tuned. For example, composites with smaller liquid metal particles (ca. 10μm or less) are stiffer than those with larger liquid metal particles (ca. >100μm) and are capable of greater force output. However, smaller particles reduce actuation strain and composites with large particles exhibit significantly greater stroke length. Such tunability in actuation properties permits the fabrication of specialized soft artificial muscles, where processing of the composite controls actuation strain and actuation force.

Soft Matter 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, Category: alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Ford, Michael J. published the artcileA multifunctional shape-morphing elastomer with liquid metal inclusions, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is liquid crystal elastomer metal composite thermal elec mech property; conductive elastomer; liquid crystal elastomer; liquid metal; shape memory; soft actuator.

Natural soft tissue achieves a rich variety of functionality through a hierarchy of mol., microscale, and mesoscale structures and ordering. Inspired by such architectures, we introduce a soft, multifunctional composite capable of a unique combination of sensing, mech. robust electronic connectivity, and active shape morphing. The material is composed of a compliant and deformable liquid crystal elastomer (LCE) matrix that can achieve macroscopic shape change through a liquid crystal phase transition. The matrix is dispersed with liquid metal (LM) microparticles that are used to tailor the thermal and elec. conductivity of the LCE without detrimentally altering its mech. or shape-morphing properties. Demonstrations of this composite for sensing, actuation, circuitry, and soft robot locomotion suggest the potential for versatile, tissue-like multifunctionality.

Proceedings of the National Academy of Sciences of the United States of America 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

Yao, Mingyue published the artcileA Highly Robust Ionotronic Fiber with Unprecedented Mechanomodulation of Ionic Conduction, Computed Properties of 7575-23-7, the main research area is ionotronic liquid crystal fiber film elastic ionic conductivity; actuators; ionic conductors; responsive materials; sensors; stretchable electronics.

Stretchable ionic conductors are appealing for tissue-like soft electronics, yet suffer from a tardy mechanoelec. response due to their poor modulation of ionic conduction arising from intrinsic homogeneous soft chain network. Here, a highly robust ionotronic fiber is designed by synergizing ionic liquid and liquid crystal elastomer with alternate rigid mesogen units and soft chain spacers, which shows an unprecedented strain-induced ionic conductivity boost (â‰?03 times enhanced as stretched to 2000% strain). Such a surprisingly high enhancement is attributed to the formation of microphase-separated low-tortuosity ion-conducting nanochannels guided by strain-induced emergence of aligned smectic mesophases, thus allowing for ultrafast ion transport that resembles the role of swimming lanes. Intriguingly, the boosting conductivity even reverses Pouillet’s Law-dictated resistance increase at certain strains, leading to unique waveform-discernible strain sensing. Also, the fiber retains thermal actuation properties with a maximum of 70% strain changes upon heating, and enables integrated self-perception and actuation. The findings offer a promising mol. engineering route to mech. modulate transport behavior of ionic conductors toward advanced ionotronic applications.

Advanced Materials (Weinheim, Germany) 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, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Guancong published the artcileA photo-driven metallo-supramolecular stress-free reversible shape memory polymer, Computed Properties of 7575-23-7, the main research area is photo metallo supramol stress free reversible shape memory polyester.

Soft machines can offer remote-powering mechanisms and mech. flexibility unmatched by conventional rigid machines. However, the mol. integration of powering and actuation functions in a simple yet versatile format has remained challenging. We achieve this with a semi-crystalline supramol. metallo-network. The dynamic metallo-bonds offer a flexible mechanism for programming the network anisotropy, which gives rise to stress-free reversible actuation using the crystalline transition as the actuation phase. In addition, the proper choice of metallo-bonds provides suitable photo-thermal capabilities for remote powering without endangering the cyclic actuation stability, despite the supramol. nature. Based on these principles, we illustrate that the supramol. network can be programmed into a reptile-style device remotely powered by light. The molecularly integrated dual functionality based on supramol. metallo-bonds provides an attractive option for the future design of soft machines with sophisticated morphing behaviors yet simple powering mechanisms.

Journal of Materials Chemistry A: Materials for Energy and Sustainability 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, Computed Properties of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Chen, Ling published the artcileHealable and Rearrangeable Networks of Liquid Crystal Elastomers Enabled by Diselenide Bonds, Name: Pentaerythritol tetra(3-mercaptopropionate), the main research area is diselanediylbispropanediyl diacrylate crosslinkable liquid crystal elastomer actuator; diselenide bond; dual-mode programmability; liquid crystal elastomer; rearrangeable LCE network.

Based on liquid crystal elastomer (LCE) materials, hierarchically structured soft actuators can meet some requirements for human-friendly working mode and execute complex tasks with intelligent adaptation to environmental changes. However, few researchers have paid much attention to the preparation methods of multicomponent/hierarchical LCE actuators. The authors demonstrate the successful integration of an exchangeable diselenide chain extender for the preparation of dynamic LCEs, which could be reprogrammed on heating or under visible light illumination. Also, the rearrangeable polydiselenide networks could be applied to develop the self-welding technol. toward fabricating hierarchically structured LCE actuators with sophisticated deformability without using any auxiliary reagent (adhesive, tape, catalysts or initiator) during the assembling process.

Angewandte Chemie, International Edition 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, Name: Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Correr-Sobrinho, Lourenco published the artcileStrengthening ceramic surfaces with the use of resin cements based on thiourethane oligomers, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is strengthening ceramic surface resin cement thiourethane oligomer.

This study evaluated the effects of thiourethane (TU) additives on the flexural strength (σf) and elastic modulus (Ef) of a resin cement, and on a possible strengthening of ceramic restorations. Methods : Two TUs (Aromatic and Aliphatic) were added at 0 (control-EC) or 20 wt% to photopolymerizable resin cements. RelyX Ultimate (RU) was the com. control. Flexural strength (σf) and elastic modulus (Ef) of the cements were measured in three-point bending (n = 8). Biaxial flexural strength (σbf) of ceramic disks with and without cement layering were determined using a ball-on-ring setup. The σbf of cement-coated specimens was calculated at positions z = 0 (ceramic surface, bonded interface) and z = -t2 (cement surface above ring). Data were analyzed with one-way ANOVA/Tukey test (α = .05). Results : σf of AR was significantly higher than for AL and RU, and Ef was lower. The Ef of RU was significantly higher than all other groups. At z = 0, all resin-coated groups had higher σbf. The σbf of RU, AR, and AL were significantly higher than EC and unfilled resin group. At z = -t2, RU had significantly higher σbf. Significance : All resin cements were able to strengthen the ceramic, with the TU-modified material presenting similar results to the com. material.

Journal of Applied Polymer Science published new progress about Adhesives. 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

Li, Yi published the artcileReconfigurable Three-Dimensional Mesotructures of Spatially Programmed Liquid Crystal Elastomers and Their Ferromagnetic Composites, Safety of Pentaerythritol tetra(3-mercaptopropionate), the main research area is reconfigurable mesotructure programmed liquid crystal elastomer ferromagnetic composite.

Reversible programming of 3D soft mesostructures is desired for many applications including soft robotics and biomedical devices. The large, reversible shape changes of liquid crystal elastomers (LCEs), which result from the coupling between the alignment of liquid crystal (LC) mols. and the macroscopic deformation of polymer networks, have attracted much attention for such applications. Here, a facile and versatile strategy is introduced to create reconfigurable, freestanding 3D mesostructures of LCEs and magnetic LCE composites that are inaccessible with existing techniques via spatially programming LC mols. through mech. buckling. Demonstrations include exptl. and theor. results of more than 20 reconfigurable 3D LCE mesostructures of diverse configurations, from coils and spirals to structures that resemble fences and frameworks, with characteristic feature sizes and thicknesses ranging from micro to macro. The large, reversible shape-switching behaviors of these structures over multiple cycles are also demonstrated. An LCE gripper is shown to grab/release objects of both regular and irregular geometries. Furthermore, a robot of ferromagnetic LCE composites that simultaneously responds to magnetic and thermal stimuli for diverse biomimetic behaviors, especially crawling underneath a narrow crack, illustrates the integration of other functional materials to LCEs for multifunctional systems.

Advanced Functional Materials published new progress about Adhesives. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Safety of Pentaerythritol tetra(3-mercaptopropionate).

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Martinez, Alina M. published the artcileTunable Surfaces and Films from Thioester Containing Microparticles, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is tunable surface film thioester microparticle.

Reported here, thioester containing microparticles were designed with 40% excess thiol to enable thiol-thioester exchange to facilitate the formation of cohesive films from the particles. A thiol-Michael dispersion polymerization was used to generate thioester containing microparticles with a diameter of 4.0 ± 0.4μm. The particles were then swollen with a base at varying concentrations to activate the thiol-thioester exchange and subsequently compressed between two glass slides. Resultant films were characterized over time with profilometry and at. force microscopy (AFM) to infer particle coalescence at different catalyst loadings and times. Tensile tests were performed confirming the structural integrity of the particle-based films. Furthermore, microparticles were welded to a nondynamic network demonstrating feasibility in potential applications to generate materials containing differing mech. properties. Being able to control the functionality of particles, and thus mech. properties of the resultant films, is also important for applications in coatings, adhesives, and 3D printing where spatial patterning or selective material property control is needed.

ACS Applied Materials & Interfaces published new progress about Adhesives. 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