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Acrylic Acid - DOAJ

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Last Updated: 10 December 2022

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Preparation of Hydrogels Based Radix Isatidis Residue Grafted with Acrylic Acid and Acrylamide for the Removal of Heavy Metals

Radix Isatidis residue/acrylic acid-co-acrylamide, Radix Isatidis residue/polyacrylamide, and Radix Isatidis residue/polyacrylamide, as well as Radix Isatidis residue/polyacrylamide, and Radix Isatidis residue/polyacrylamide, are three-dimensional, and highly microporous gels. The maximum adsorption capacity of RIR/AA-co-AM hydrogel for Cd 2+ and Cu 2+ is marginally smaller than that of RIR/PAA 4. RIR/AA-co-AM for heavy metal ions' adsorption process is also compatible with the pseudo-second-order kinetic equation, and Langmuir adsorption isotherm. The hydrogels removal of heavy metal ions from water are determined by various aspects of microstructure analysis and adsorption kinetics, electrostatic adsorption, and ion exchange. Hydrogels made from Chinese herb residue can be used to efficiently remove heavy metals from wastewater and improve the reutilization of Chinese herb residues, according to It.

Source link: https://doi.org/10.3390/w14233811


Chitosan-Graft-Poly(acrylic acid) Superabsorbent’s Water Holding in Sandy Soils and Its Application in Agriculture

Low absorption and storage water, low nutrient content, and a high water evaporation rate make Sandy soil not suitable for use as agricultural land. The aim of this research was to determine the absorption, swelling, and water retention of sandy soil enriched with superabsorbent, as well as the chitosan-graft-poly superabsorbent characteristics. Increased chitosan concentration boosted the gel fraction, swelling, reusability, and water retention, according to the study. Likewise, an increase in chitosan concentration decreased water retention in sandy soils.

Source link: https://doi.org/10.3390/polym14235175


Copper Ions Absorbed on Acrylic-Acid-Grafted Polystyrene Enable Direct Bonding with Tunable Bonding Strength and Debonding on Demand

Recycling adhesively bonded polymers is inconvenient due to the high cost of separation and removal of adhesive residues. Flat substrates have already had good adhesion between flat substrates when oxygen plasma treatment has been used. The number of functional groups on the surface was dramatically increased during this process, despite increasing the surface roughness. Hence, the bonding stability and the debonding time under water can be adjusted over wide ranges by mixing acrylic acid grafting, changes in the bonding temperatures, and the use of copper ions.

Source link: https://doi.org/10.3390/polym14235142


Gallic Acid-Loaded Sodium Alginate-Based (Polyvinyl Alcohol-Co-Acrylic Acid) Hydrogel Membranes for Cutaneous Wound Healing: Synthesis and Characterization

Traditional wound dressings are often unable to address wounds caused by bacterial infections or other wound types that are insensitive to these wound therapies. U00b7h 122121 u22121 kilne 93 and 110 ppm 2 u33bcg/cm 2 u00b7h u00b72121 based on Franz cell results, the permeation flux of the drug from optimized formulations through mouse skin was 92 and 110 bcg/cm 2 u00b7h u22121. Similarly, hydrogel membranes retained substantial amounts of drug in the skin for 24 h, including 2371 and 3300 g/cm 2. Hydrogel membrane membranes were nonirritating during acute dermal irritation tests in rats. Gallic acid-containing hydrogel membranes could be an effective way to promote wound healing and could lead to faster wound healing.

Source link: https://doi.org/10.3390/molecules27238397


Influence of the RAFT Agent on the Reaction Direction of the Copolymerization of Polypropylene Glycol Maleate with Acrylic Acid

The initial unsaturated polyester resin was derived from alcohol and maleic anhydride's polycondensation reaction. Gel permeation chromatography revealed the polypropylene glycol maleate's molecular weight by molecular weight. The more chain-transfer agent in the monomer mixture, the lower the yield of the crosslinked polymer, and the higher the yield of the branched copolymer were found. The study findings reveal that the RAFT agent concentration and the initial ratio of monomers in the copolymer affects the products' yield.

Source link: https://doi.org/https://doi.org/10.31489/2022Ch3/3-22-10


Amidation of Polyethylene-Acrylic Acid Copolymer as Pour Point Depressants for Waxy Crude Oils

For crude oils' depressants, by pour point experiments at 50 ppm, 100 ppm, and 200 ppm, as well as rheological results at 100 ppm. The crude oil poured point measurements revealed that octadecylamine-modified PEAA copolymer was more effective than butylamine-modified and unmodified PEAA copolymer. The polarity of the monoalkylamide chains in the peripheral substituents of the copolymer backbone, which plays a key role in preventing the agglomeration of wax crystals in crude oil can be explained by the improved copolymers' effectiveness relative to unmodified PEAA.

Source link: https://doi.org/https://doi.org/10.31489/2022Ch3/3-22-1


In Vitro and In Vivo Evaluation of Hydroxypropyl-β-cyclodextrin-grafted-poly(acrylic acid)/poly(vinyl pyrrolidone) Semi-Interpenetrating Matrices of Dexamethasone Sodium Phosphate

We created a semi-interpenetrating polymeric network of hydroxypropyl-u03b2-poly grafted -poly/poly network in this paper, intended for the production of dexamethasone sodium phosphate from a colony specific dexamethasone sodium phosphate. Polyvinyl pyrrolidone, acrylic acid, and hydroxypropyl-beta-cyclodextrin were mixed with ammonium persulate as initiator and crosslinker to produce a hydrogel system with optimal swelling at distal intestinal pH. This formulation was capable of releasing a small amount of drug at acidic pH, but by the non-Fickian diffusion technique, a maximum amount of drug was released at colonic pH. A successful graft of components and the construction of a semi-IPN system without any contact with the DSP revealed an effective infrared spectroscopy. A rough and porous hydrogel surface was revealed by scanning electron microscopic photographs. AP-8 can therefore be regarded as a potential carrier for targeted DSP delivery of inflammatory bowel diseases.

Source link: https://doi.org/10.3390/ph15111399


Theoretical and Experimental Insights of Benzimidazole Catalyzed by the Epoxy–Acrylic Acid Reaction

A reaction of diglycidyl ether of bisphenol-A-based epoxy resin and acrylic acid was initiated by a reaction of diglycidyl ether of bisphenol-A-based epoxy resin and acrylic acid, using benzimidazole as a catalyst. The product's FTIR analysis revealed a simple addition esterification reaction between the epoxide group and the carboxylic group of acrylic acid, excluding the side reactions.

Source link: https://doi.org/10.3390/molecules27227900


Cu(II) Adsorption from Aqueous Solution onto Poly(Acrylic Acid/Chestnut Shell Pigment) Hydrogel

By radical polymerization free from a traditional crosslinker, we developed a novel melanin-based hydrogel made from renewable chestnut shell pigment and acrylic acid. The adsorption reaction occurred as a spontaneous and exothermic reaction triggered by enthalpy and entropy, according to the Langmuir isotherm with the maximum monolayer adsorption capacity of 200. 3 mg/g; The dry hydrogel demonstrated a porous structure with a network of interconnected spindle-shaped bars; the kinetic adsorption data indicated that: The adsorption data were consistent with both the pseudo-first-controlled by adsorption experiment showed adsorption process co-driven by adsorption adsorption;.

Source link: https://doi.org/10.3390/w14213500


Wetting Characteristics of Nanosilica-Poly (acrylic acid) Transparent Anti-Fog Coatings

By changing a coating formulation based on hydrophilic silica nanoparticles and poly, the effect of particle loading on coating wetting characteristics was investigated. To determine the surface wetting characteristics, water contact angle measurements were performed for all coatings. When the particle loading was greater than 53 vol. , the resulting coatings demonstrated superhydrophilic activity. %. The coatings were glued to the substrate by tape test and found to be durable. When the particle loading was above 84 vol. , the coatings demonstrated good transparency. % is the percentage that matters.

Source link: https://doi.org/10.3390/polym14214663

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions