Tag: M.W=400-500

Wang, Aili published the artcileIn-situ preparation and properties of copper nanoparticles/poly(ionic liquid) composites by click chemistry within surfactant-free ionic liquid microemulsions, Category: alcohols-buliding-blocks, the main research area is copper nanoparticle polyionic liquid reduction catalyst adsorptive wastewater treatment.

Herein, we present for the first time the facile synthesis of copper nanoparticles/poly(ionic liquid) (Cu-NPs/poly-IL) composites through the in situ click method within surfactant-free ionic liquid microemulsions. The resultant Cu-NPs/poly-IL composites were further utilized for phys. adsorption and chem. catalytic reduction of methyl orange (MO) and dispersed red (DR) in water. FTIR, NMR, XRD, TGA, DSC, SEM, and UV-vis methods were used to investigate the structure and characteristics of the designed Cu-NPs/poly-IL composites. Results showed that Cu-NPs were successfully and stably introduced on poly-ILs without oxidation and that resultant composites presented enhanced thermostability and adsorption capacity for the DR. Detailed kinetic studies and thermodn. anal. of the adsorption process were carried out. Furthermore, the catalytic reduction performance of Cu-NPs/poly-IL composites for MO and DR was investigated, and results indicated that the designed composites had certain catalytic reduction effects. Therefore, the easily synthesized Cu-NPs/poly-IL composites show remarkable potentials for wastewater treatment and purification

Journal of Molecular Liquids published new progress about Adsorbents. 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

Yap, Pei Lay published the artcileMultithiol functionalized graphene bio-sponge via photoinitiated thiol-ene click chemistry for heavy metal ions adsorption, COA of Formula: C17H28O8S4, the main research area is wastewater adsorption graphene oxide adsorbent uv irradiation functionalization thiol; heavy metal cation seawater remediation.

Heavy metals contamination in the natural waters remains an unresolved environmental challenge pressing for the development of purification technologies. This paper presents the green engineering of a new bio-sponge for heavy metals adsorption composed of alginate bio-polymeric network encapsulated with reduced graphene oxide (rGO) modified with iron oxide nanoparticles and covalently attached multithiol (pentaerythritol tetrakis-mercaptopropionate) mols. using photoinitiated thiol-ene click chem. The multithiol functionalized graphene bio-sponge (SH-Graphene bio-sponge) is designed to enhance adsorption performances of heavy metals including structural approach combined with oxygen functionalities and high d. of sulfur-containing groups (10.2 at % S, confirmed by XPS, XPS) with high binding affinity towards specific heavy metals (Cd and Pb). It was shown that the level of thiol functionalization on the graphene structure within the bio-sponge can be controlled by tuning the UV irradiation time without adjusting the concentration of the precursors. SH-functionalized graphene bio-sponge showed outstanding adsorption capacity for Pb (II): 101.01 mg/g and Cd (II): 102.99 mg/g, outperformed com. and literature reported adsorbents in highly competitive selectivity studies using co-existing heavy metal ions (Cu, Co, Pb and Cd) spiked- sea water. The multithiol modified bio-sponge also showcased an excellent stability and reusability feature with only 0.015 mg/L Pb (II) detected, conforming the strict United States Environmental Protection Agency (US EPA) maximum contaminant level (MCL) for lead, after five recurring cycles using mixed heavy metal ions solution and acidic eluent. The outcomes from this work present valuable and promising contribution towards the development of a scalable and sustainable adsorbents for efficient remediation of heavy metals from waters.

Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Adsorbents. 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

Yavuz, Mustafa Selman published the artcileHighly efficient chlorinated solvent uptake by novel covalent organic networks via thiolene chemistry, Computed Properties of 7575-23-7, the main research area is covalent organic network adsorbent chlorinated solvent uptake.

In this study, an aliphatic-aromatic regular network is synthesized as a novel covalent organic networks called TEPN-1 (Thiol-ene Polymer Network) and TEPN-2 via thiol-ene chem. TEPN-1 and TEPN-2 were analyzed by FTIR, 13C-NMR, Brunauer-Emmett-Teller, thermogravimetric anal., and elemental anal. Solvent uptake capacity of TEPN-1 and TEPN-2 was employed against 26 solvents which are frequently used in chem. industry. It is found that TEPN-1 has the highest swelling adsorption ratio with chloroform and DCM (13.7 and 11.5 g.g-1, resp.), while TEPN-2 has 9.2 and 7.5 g.g-1, resp. Both TEPN-1 and TEPN-2 have very minimal water uptake (0.165 and 0.189 g.g-1, resp.). The TEPN-1 and TEPN-2 are efficient adsorbents for most of organic solvents including water-miscible organic solvents such as THF, dioxane, and pyridine.

Polymer Bulletin (Heidelberg, Germany) published new progress about Adsorbents. 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

Bhattacharya, Sayantani published the artcileTriphenylphosphonium conjugated quaternary ammonium based gel: synthesis and potential application in the efficient removal of toxic acid orange 7 dye from aqueous solution, Recommanded Product: Pentaerythritol tetra(3-mercaptopropionate), the main research area is triphenylphosphonium conjugated quaternary ammonium gel orange 7 removal.

Adsorptive removal of azo dyes from textile effluents is considered to be one of the most widely used means of wastewater decontamination owing to its inexpensiveness, regeneration feasibility, and overall robustness. Most importantly, this process inherently eliminates the formation of offensive end products that eventuates further disposal problems. Therefore, it is imperative to design a suitable adsorbent that has a facile synthetic route and that features high dye removal efficiency as well as substantial regeneration. Hence, in this work, we have developed an ingenious adsorbent based on the thiol-norbornene photocrosslinking reaction. To facilitate the removal of the anionic azo dye acid orange 7, we have prudently introduced quaternary ammonium as well as triphenylphosphonium functionalities in the crosslinked network. Characterization of all the monomers and the crosslinker was accomplished by using standard spectroscopic and anal. techniques. The porous morphol. of the crosslinked gel was visualized via FE-SEM and TEM anal. Addnl., rheol. studies revealed the presence of viscoelasticity in the network. Besides, the solvent uptake ability of the gel was also explored in various solvents, and it was reasonably correlated with the solubility parameter. In this regard, swelling in water was found to be particularly beneficial, as a high water uptake allowed internal adsorption sites present in the gel to be fully exposed to the dye mols., thereby ameliorating dye removal. The material showed excellent thermal stability up to 240 °C. Further, the adsorption nature of the gel correlated well with the pseudo-second order kinetic model as well as the Freundlich adsorption isotherm model. The influence of varying temperatures (303-323 K) as well as pH (2-10) on the adsorption process was also evaluated. The maximum dye removal efficiency of 105.8 mg g-1 was obtained at 303 K. Interestingly, the material was reasonably recyclable up to 10 cycles with no significant loss of re-adsorption efficiency (around 7% loss between the 1st and 10th cycle). We envisage that this strategy of developing low-cost, efficient adsorbents will expand the scope of utilizing environmentally friendly thiol-norbornene photo click chem. to alleviate water pollution.

New Journal of Chemistry published new progress about Adsorbents. 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

Fu, Junchao published the artcilePreparation and properties of UV-curable hyperbranched polyurethane acrylate hard coatings, COA of Formula: C17H28O8S4, the main research area is hyperbranched polyurethane acrylate hard coating mech property.

In order to efficiently protect plastic cover of 5G mobile phones, a novel hyperbranched polyurethane acrylate-based hard coating (HBPUA) having highly rigid hyperbranched cores was prepared and used as the protective film. For purpose of researching the structure and property relationship, two more hyperbranched cores (Hyper-6OH) and corresponding HBPUA oligomers were also synthesized. The structures of Hyper-6OH and HBPUA were characterized by proton NMR, and the mol. weight of HBPUA was confirmed by gel permeation chromatog. To further enhance the crosslinking and lower the internal stress, pentaerythritol tetra(3-mercaptopropionate) (PETMP) was introduced into the film system. The curing behaviors of the prepared HBPUA coatings were determined by Fourier-transform IR spectroscopy. The results indicated that the double bond conversion was associated with the rigidity of the hyperbranched core and the content of thiol groups. The properties of HBPUA-based films were characterized by the test of gel content, swelling ratio and water absorption and as well as dynamic mech. property, mech. property, thermogravimetry and surface property. The results reveal that the pencil hardness of the prepared coatings reaches 5H that is higher than the com. available resin PUA-6, enabling potential application in the protection of plastic cover. The rigidity of the hyperbranched cores and the introduction of PETMP remarkably affect the Tg value of the films, and the addition of thiol groups increases the gel content, swelling ratio, toughness and adhesion of coatings, but decreases the water absorption and tensile strength. Moreover, all coatings exhibit good thermal properties.

Progress in Organic Coatings published new progress about Absorption. 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

Cao, Chun published the artcileClick chemistry assisted organic-inorganic hybrid photoresist for ultra-fast two-photon lithography, Formula: C17H28O8S4, the main research area is chem organic inorganic hybrid photoresist photon lithog.

Although the development of two-photon lithog. (TPL) for decades of years, fabrication of 2D micro architectures with high throughput is still challenging, due to the lack of suitable photoresists for ultra-fast TPL. In present work, curable zirconia nanoclusters (Zr-NCs) and click-chem. were incorporated together to form an organic-inorganic hybrid photoresist. Interestingly, Zr-NCs endowed photoresists higher photosensitivity by means of improving the adsorption capacity and reducing the absolute fluorescence quantum yield of used initiator. Moreover, oxygen inhibition had been eliminated by effective thiol-ene click reaction. As a result, the maximum lithog. speed of achieved photoresist was significantly enhanced to 2.0 m s-1, that was dozens of times higher than the reported TPL photoresists. Meanwhile, the photoresist also exhibited a distinguish min. feature size (59 nm), attributed to high sensitivity and inhibited diffusion of free radical in solid photoresist film. Finally, a high quality micro QR code had been successful prepared by our photoresist at 1.0 m s-1, which can be recognized to visit the affiliated website. Therefore, this work might provide an alternative strategy to pave the way of ultra-fast 2D TPL.

Additive Manufacturing published new progress about Absorption. 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

Zhu, Yazhi published the artcileDirectly photopatterning of polycaprolactone-derived photocured resin by UV-initiated thiol-ene “”click”” reaction: Enhanced mechanical property and excellent biocompatibility, Synthetic Route of 7575-23-7, the main research area is biomedical polycaprolactone photocured resin UV photopatterning property biocompatibility.

This paper reports a novel routine for the fabrication of a polycaprolactone-derived (PCL-derived) photocured material crosslinked by pentaerythritol tetra (PETMP) with enhanced mech. property and excellent biocompatibility. The photocured material is crosslinked via UV irradiation through thiol-ene “”click”” chem. The main novelty of this technique is the facile fabrication of high-resolution patterns (âˆ?μm) using photolithog., and without adding photo-initiators. The photocured material is studied regarding to its thermal property, mech. property and cytocompatibility. DSC and DMA suggest that the flexibility and toughness of PCL-derived photocured material have improved. Accordingly, the PCL-derived photocured material achieves enhanced mech. property (with the increase of PCL segment content from 0 to 38.0%, the photocured samples monotonically increased their breaking strength from 0.62 to 3.10 MPa and Young’s modulus from 1.39 to 9.22 MPa). Due to the incorporation of the PCL-derived copolymer, the material shows excellent affinity to cells, which is demonstrated by the cell proliferation and release of LDH. The hemolysis ratio of PCL-derived photocured materials is all <5%, while the PEGDA photocured material is âˆ?7%. It can also be observed that PCL-derived photocured material will improve the biocompatibility and reduce biotoxicity compared with PEGDA. This facile route for synthesis of biocompatible photocured resin with micrometer-resolute patterns has a good impact in bioengineering and biomedical fields. Chemical Engineering Journal (Amsterdam, Netherlands) published new progress about Absorption. 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

Galli, Paola published the artcileCyclic allylic sulfide based photopolymer for holographic recording showing high refractive index modulation, Application In Synthesis of 7575-23-7, the main research area is cyclic allylic sulfide photopolymer holog recording refractive index modulation.

The development and characterization of a new holog. photopolymer system showing high refractive index modulation (Δn) is presented. It exploits the ring-opening polymerization reaction of a cyclic allylic sulfide (CAS) monomer, which is dispersed in a cellulose acetate butyrate (CAB) polymer matrix together with a blue sensitive radical photoinitiator. Volume Phase Holog. Gratings (VPHGs) obtained using these films show a very good fidelity of the transferred pattern, without deviations from the theor. curves. A high Δn is obtained due to the addition to this system of a tetrafunctional thiol crosslinker, which maximizes the material potential (formula limit) of the formulation. It also allows for a thermal post process of the gratings, further enhancing the Δn. The photopolymer properties are evaluated as function of the monomer and thiol concentration to determine the optimal composition, at which a Δn greater than 0.03 is obtained. This is a considerably high value in the field of photopolymers for holog. and it enables the manufacturing of efficient holograms.

Journal of Polymer Science (Hoboken, NJ, United States) published new progress about Absorption. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, Application In Synthesis of 7575-23-7.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Park, Jinyoung published the artcileSpatiotemporal vitrimerization of a thermosetting polymer using a photo-latent catalyst for transesterification, Product Details of C17H28O8S4, the main research area is thermosetting polymer transesterification photolatent catalyst.

Globally rising environmental concerns have increased the demand for recyclable polymers and efficient recycling practices. The lack of melt-processability of thermosets significantly limits their recycling because the simplest and most economical way to recycle polymers with a min. carbon footprint is repairing or re-melting them into new items. To this end, an approach to spatiotemporally converting a thermoset into a processable vitrimer is presented. This was achieved by incorporating a latent, heat-stable photo-active catalyst into an otherwise thermoset, activating network exchange reactions only after light exposure and subsequent heating. The thermoset film could be repaired and/or heat-processed by simply exposing the sample to light followed by annealing at elevated temperature and pressure, whereas the repairing/heat-processing failed in the absence of the light exposure step. This approach enables the polymer to initially behave as a thermoset at all temperatures until it requires repair or heat-processing.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about Absorption. 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

Dao, Vu H. published the artcileSynthesis of UHMW Star-Shaped AB Block Copolymers and Their Flocculation Efficiency in High-Ionic-Strength Environments, Related Products of alcohols-buliding-blocks, the main research area is star copolymer flocculation efficiency ionic strength environment.

The neg. effect of multivalent cations such as Ca2+ and Mg2+ on the flocculation efficiency of anionic polymeric flocculants has proven to be a difficult challenge to overcome in recent years. We hereby introduce a new series of ultrahigh mol. weight four-arm star-shaped AB block copolymers, with terminal anionic blocks and a neutral core comprising polyacrylic acid and polyacrylamide, resp. These polymers were successfully synthesized using a two-stage aqueous reversible addition-fragmentation chain transfer (RAFT) polymerization process with the aid of a four-arm star RAFT agent and a redox initiation pair of ammonium persulfate and sodium formaldehyde sulfoxylate. Once synthesized, these polymers were directly used for flocculation anal. where they were compared to a control statistical copolymer of similar mol. weight The control copolymer was designed to be representative of current com. flocculants where the anionic functionalities were distributed randomly along the polymer chain, where the neg. effects of multivalent cations are heightened. In comparison to the control copolymer, four-arm star-shaped AB block copolymers exhibited strong stability and flocculation efficiency across the three different Ca2+ concentrations (0.05, 0.10, and 0.50 M) employed. Fast settlement rates and low supernatant turbidities were obtained when four-arm star-shaped AB block copolymers were employed, while the flocculation efficiency of the control copolymer was impacted significantly with the increase in the concentration of Ca2+. With further optimization and anal., these polymers have a strong potential to be implemented in industrial applications of flocculation in the near future.

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