Month: December 2022

Liang, Ziwei published the artcileArbitrarily and repeatedly programmable multi-layer soft actuators via “”stress-caching””, Related Products of alcohols-buliding-blocks, the main research area is multilayer shape memory material.

Multi-layered strategy is prevalent in actuator fabrication since only a mismatch of geometric changing between layer(s) under the external stimulus is required, allowing to avoid meticulous mol. synthesis. Nonetheless, their actuation manners are usually limited to simple bending, of which the direction as well as amplitude are not (re)programmable after synthesis. Here, an arbitrarily and repeatedly programmable multi-layered actuator via “”stress-caching””, where a shape memory polymer (SMP) is sandwiched with two coated hydrogel layers, is presented. Via varying the swelling/de-swelling degree between the top and bottom hydrogel layers, the designed internal stress, determining the bending direction and angle, was stored within the actuator due to the constraint of the rigid SMP layer. Upon heating, the release of the cached stress induced a “”snap-like”” fast actuation and the resultant geometry can be designed, preserved or recovered on demand. Addnl., the flame-retardant hydrogel layers safeguarded the actuator to work at high temperatures (even directly exposed to flame), ensuring potential applications in a fire-rescuing scenario as demonstrated. Thus, our stress-caching approach shall diversify the designs of actuator since other myriad smart materials with distinct responsiveness and functionality can be straightforwardly employed.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Contact angle. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Jeong, Songah published the artcileHierarchical Design of Functional, Fibrous, and Microporous Polymer Monoliths for the Molecular Recognition of Diethylstilbestrol, COA of Formula: C17H28O8S4, the main research area is hierarchical fibrous microporous polymer mol recognition diethylstilbestrol; endocrine disruptor mol recognition.

This paper demonstrates the hierarchical design of functional, fibrous polymer monoliths. The monoliths are composed of conjugated microporous polymers that not only are embedded with heteroatoms but also feature fibrous yet compressible structures due to the in situ self-assembly process that occurs during the polymerization process. Therefore, the doped nitrogen atoms can allow the growth of zeolitic imidazolate framework (ZIF) nanocrystals, which causes the homogeneous encapsulation of individual fibers. The resulting hybrid monoliths exhibit enhanced phys. properties as well as catalytic activity, allowing the formation of an addnl. coating layer via a thiol-epoxy reaction. The deliberate inclusion of template mols. during the reaction forms molecularly imprinted sites on the fibers to afford functional monoliths. As a proof of concept, the hierarchically designed materials are able to show effective recognition properties toward diethylstilbestrol, an endocrine disruptor, taking advantage of the binding sites that selectively capture the analyte mols. and the fibrous morphol. that increases the accessibility of these binding sites. We envisage that the incorporation of various heteroatoms or nanocrystals will bring about the bespoke design of advanced monoliths with autonomous functions, leading to smart textile systems.

Analytical Chemistry (Washington, DC, United States) published new progress about Contact angle. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, COA of Formula: C17H28O8S4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Albu, Paul Constantin published the artcilepH and Design on n-Alkyl Alcohol Bulk Liquid Membranes for Improving Phenol Derivative Transport and Separation, Safety of n-Octanol, the main research area is alkyl alc bulk liquid membrane transport separation; bulk liquid membranes; liquid membrane design; n–decanol membranes; n–octanol membranes; pH operational parameter; permeation module design; phenol derivative separation; phenol derivative transports.

Regardless of the type of liquid membrane (LM) (Bulk Liquid Membranes (BLM), Supported Liquid Membranes (SLM) or Emulsion Liquid Membranes (ELM)), transport and separation of chem. species are conditioned by the operational (OP) and constructive design parameters (DP) of the permeation module. In the present study, the pH of the aqueous source phase (SP) and receiving phase (RP) of the proposed membrane system were selected as operational parameters. The mode of contacting the phases was chosen as the convective transport generator. The experiments used BLM-type membranes with spheres in free rotation as film contact elements of the aqueous phases with the membrane. The target chem. species were selected in the range of phenol derivatives (PD), 4-nitrophenol (NP), 2,4-dichlorophenol (DCP) and 2,4-dinitrophenol (DNP), all being substances of tech.-economic and environmental interest. Due to their acid character, they allow the evaluation of the influence of pH as a determining operational parameter of transport and separation through a membrane consisting of n-octanol or n-decanol (n-AlcM). The comparative study performed for the transport of 4-nitrophenol (NP) showed that the module based on spheres (Ms) was more performant than the one with phase dispersion under the form of droplets (Md). The sphere material influenced the transport of 4-nitrophenol (NP). The transport module with glass spheres (Gl) was superior to the one using copper spheres (Cu), but especially with the one with steel spheres (St). In all the studied cases, the sphere-based module (Ms) had superior transport results compared to the module with droplets (Md). The extraction efficiency (EE) and the transport of 2,4-dichlorophenol (DCP) and 2,4-dinitrophenol (DNP), studied in the module with glass spheres, showed that the two phenolic derivatives could be separated by adjusting the pH of the source phase. At the acidic pH of the source phase (pH = 2), the two derivatives were extracted with good results (EE > 90%), while for pH values ranging from 4 to 6, they could be separated, with DCP having doubled separation efficiency compared to DNP. At a pH of 8 in the source phase, the extraction efficiency halved for both phenolic compounds

Membranes (Basel, Switzerland) published new progress about Contact angle. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Safety of n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kim, Myung-Jin published the artcileControlling the gate dielectric properties of vinyl-addition polynorbornene copolymers via thiol-ene click chemistry for organic field-effect transistors, Formula: C17H28O8S4, the main research area is gate dielec vinyl polynorbornene thiol click organic field transistor.

A simple way to control the gate dielec. properties of vinyl-addition polynorbornene copolymers bearing pendant vinyl groups (P(NB/VNB)) through thiol-ene click chem. is reported. The optimized content ratio of tetra-thiol cross-linkers leads to the enhanced gate dielec. properties and performance of organic field-effect transistors. Also, this approach provides photo-patternability, low-temperature solution-processing, and air-processability.

Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about Contact angle. 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

Abdelrahman, Mustafa K. published the artcileEmergent Surface Topography Enabled by Concurrent Crystallization and Polymerization, Synthetic Route of 7575-23-7, the main research area is emergent surface topog enabled concurrent crystallization polymerization.

Materials with dynamic surface topog. may enable a variety of new technologies from smart coatings to biomaterials with controlled cell-material interaction. However, current approaches to create morphing surfaces require programming procedures, either before or after polymerization, that complicate the application of these materials. Here, we exploit the metastability of the microstructure of semicrystalline polymer networks that crystallize while photopolymerizing to create polymer coatings and microstructures that irreversibly morph from smooth to rough in an emergent manner when heated. For example, a smooth polymer coating with a root-mean-square (Rq) roughness of 15 nm transforms into a rough film with a Rq roughness of 688 nm on heating through the melt temperature We show that this behavior is observed across a range of polymer networks and that the degree of undercooling during polymerization is the primary factor that controls the magnitude of roughness. This technique is not limited to polymer films; microstructures fabricated utilizing micromolding or emulsion polymerization also undergo changes in roughness on heating. Finally, we discuss using this approach to create polymer structures with spatiotemporal control of coefficients of friction and contact angles.

Macromolecules (Washington, DC, United States) published new progress about Contact angle. 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

Hu, Zhiqi published the artcileImproved Mechanical Durability of High-Performance OPVs Using Semi-Interpenetrating Networks, Category: alcohols-buliding-blocks, the main research area is organic photovoltaic device bending deformation mech durability.

Organic photovoltaic (OPV) devices offer a number of unique advantages over conventional single crystal silicon solar cells, such as simple and low-cost fabrication, significantly reduced weight, high flexibility, and semitransparency. However, OPV devices exhibit poor durability to mech. deformations. Here, the use of an elastic semi-interpenetrating network is studied to improve the mech. durability of the active layer of OPV devices based on the high-performance donor:acceptor blend (PBDBT-2F:ITIC). The elastic interpenetrating network is synthesized in situ through the UV photoinitiated crosslinking of thiol-ene additives in the active layer. The effects of strain as a function of bending on the network-stabilized active layer structure are systematically investigated. The elastic interpenetrating network suppresses crack formation and improves durability to high-curvature and repeated bending deformations. Performance measurements show that network-stabilized devices outperform pristine devices above a critical bending strain and number of bending deformations. The photovoltaic performance in general decreases with the increase in the network content, and the best performing devices are obtained using network forming reagents that are most compatible with the donor:acceptor system. This work describes an effective route to flexible devices using semi-interpenetrating polymer networks and provides insight into the design of the networks to maximize photovoltaic performance.

Advanced Optical Materials published new progress about Contact angle. 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

Li, Yanqing published the artcileBis(N-acylated imidazolin-2-imine) nickel catalyzed norbornene copolymerization with methyl acrylate, Product Details of C4H11NO2, the main research area is imidazolin imine catalyzed norbornene methyl acrylate copolymerization.

The incorporation of even a small number of polar functional groups in the polyolefin backbone is sufficient to improve the polyolefin properties. Compared with palladium catalyzed direct copolymerization of olefins with polar vinyl monomers, the development of low-cost nickel-based catalysts is more challenging because of their higher oxophilicity. On the basis of the advantage of reducing the electrophilicity of the nickel center by the installation of strongly electron-donating ligands, we herein report the synthesis of novel bis(N-acylated imidazolin-2-imine) nickel complexes for norbornene polymerization and copolymerization with polar monomers. Moreover, the Ph substituent on the imidazoline ligand is expected to enhance the tolerance of the nickel catalyst toward polar functional groups, thus allowing the copolymerization of norbornene with com. Me acrylate to afford high mol. weight functionalized cyclic olefin copolymers (COCs) with moderate activity and reasonable comonomer content.

Polymer Chemistry published new progress about Contact angle. 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Product Details of C4H11NO2.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wang, Tong published the artcileHigh-Speed Countercurrent Chromatography-Based Method for Simultaneous Recovery and Separation of Natural Products from Deep Eutectic Solvent Extracts, Safety of (S)-2-hydroxysuccinic acid, the main research area is natural product separation extraction deep eutectic solvent.

The use of deep eutectic solvents (DESs) to extract natural products has attracted considerable attention in recent years. However, the recovery of extracted compounds and DES from DES extracts is still a barrier, which restricts the large-scale application of DESs. Here, we proposed a high-speed countercurrent chromatog. (HSCCC)-based method to recover extracted compounds and DES. As a proof of concept, the chrysanthemum DES extract was selected to verify the method. We first prepared a series of DES-based solvent systems and screened them based on their phys. and chem. properties. Only the system composed of choline chloride/L-malic acid, water, and Et acetate (1:1:1, volume/volume/v) was suitable. By using the solvent system for HSCCC separation, the target compounds and DES in the chrysanthemum DES extract were both successfully recovered with high recovery yields over 95%. Then, we investigated the reusability of the recovered DES and found that it could be repeatedly reused for three times without any performance deterioration. All these results indicated that the proposed method is feasible and efficient, which has great potential for application. Moreover, the method may also be used in other fields where the separation process is needed, such as organic synthesis, chem. separation, biosepn., and biotransformation. A simple and efficient method was developed for recycling deep eutectic solvents used in the natural product green extraction and separation process.

ACS Sustainable Chemistry & Engineering published new progress about Chrysanthemum. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Safety of (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Pan, Mingzhang published the artcileReduction in PM and NOX of a diesel engine integrated with n-octanol fuel addition and exhaust gas recirculation, Category: alcohols-buliding-blocks, the main research area is nitrogen oxide octanol diesel engine exhaust gas particulate matter.

N-Octanol with its high energy d. and high cetane number has similar fuel properties as diesel fuel, and is thus considered an excellent choice for alc. fuels as a substitute for diesel. This study focused on the effects of exhaust gas recirculation (EGR) combined with the addition of n-octanol on the performance, emissions, and particulate matter (PM) of a direct injection diesel engine. The results show that the curves of the in-cylinder pressure of n-octanol/diesel blends nearly overlap those of pure diesel fuel under the test conditions. At a low EGR ratio, the brake thermal efficiency of n-octanol/diesel blends is higher than that of diesel fuel. With an increase in the EGR ratio, the results show that nitrogen oxide (NOX) emissions decrease, whereas carbon monoxide (CO) and soot emissions significantly increase. However, the use of n-octanol/diesel blends can inhibit the increase in CO and soot emissions appreciably. In addition, with an increase in n-octanol content in the blends, the number concentration of particles on the particle size distribution decreases gradually. To summarize, a simultaneous reduction in NOX and PM emissions under a combined operation of small EGR ratios and n-octanol blends can be realized, thereby improving the brake thermal efficiency.

Energy (Oxford, United Kingdom) published new progress about Cetane number. 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

Huo, Jiaying published the artcileImmunomodulatory activity of a novel polysaccharide extracted from Huangshui on THP-1 cells through NO production and increased IL-6 and TNF-α expression, Recommanded Product: (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal, the main research area is polysaccharide Huangshui Moringa monosaccharide Escherichia; Baijiu; Huangshui; Immunomodulatory activity; Polysaccharide; Structural characterization.

Huangshui (HS), the byproduct of Chinese Baijiu, has attracted considerable attention due to its nutrient and microbial composition; however, none of the studies has explored the polysaccharides in HS yet. Here, from HS, we isolated a novel polysaccharide, HSP-3, with an average mol. weight of 26.40 kDa. The structure was elucidated based on monosaccharide composition and methylation anal., NMR, FT-IR, and AFM anal. It is mainly composed of mannose (46.6%), galactose (17.3%), arabinose (11.2%), glucose (10.5%), xylose (8.2%), fucose (5.2%), and rhamnose (1.0%). The backbone of HSP-3 was made up of → 2-β-D-Manp-(1 → 2,6)-β-D-Manp-1 → 6-β-D-Galp-(1 → 3,6)-β-D-Galp-(1 → 4)-α-L-Rhap-1 → 3,4-α-L-Rhap-1 → . Moreover, stimulation of the production of ROS, NO, TNF-α and IL-6, upregulation of the mRNA and protein expression levels of TNF-α and IL-6 in THP-1 cells, and enhanced the pinocytic and phagocytic capacities of THP-1 cells exhibited significant immunomodulatory properties of HSP-3. Altogether, this study suggests that HSP-3 could be used as an active component in functional foods.

Food Chemistry published new progress about Cell survival. 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, Recommanded Product: (2R,3S,4S,5R)-2,3,4,5,6-Pentahydroxyhexanal.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts