Synthesis, Structure and Swelling Properties of Hydrogels Based on Polyacrylic Acid

Mammadova, S.M.; Tapdigov, Sh.Z.; Humbatova, S.F.; Aliyeva, S.A.; Zeynalov, N.A.; Soltanov, Ch. A.; Cavadzadeh, A.A.

doi:10.14233/ajchem.2017.20262

Cited by 6 publications

(6 citation statements)

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“…Moreover, the novel hydrogels displayed better consistency and stability than those prepared from water, while the sample denoted as H5 even exhibited a higher swelling capacity (almost 1700%) than established (acrylicbased) hydrogels manufactured on the basis of deionized water [24,28]. These findings demonstrate that the novel biodegradable hydrogels exhibit significantly greater swelling capacities than commercially available cellulose-based superabsorbent materials with swelling ratios of 380-680% [29,30].…”

Section: Resultsmentioning

confidence: 78%

“…In order to evaluate the swelling behaviour of the CMCNa/HEC whey hydrogel, the hydrogel samples containing only CMCNa or HEC cross-linked with CA were prepared according to the same procedure described above. To evaluate the effect of cross-linking temperature on the swelling behaviour of hydrogel and dependency of cross-linking temperature on viscoelastic properties of swollen hydrogel, the samples of different cross-linking temperatures (30,50,60,70,80, and 90°C) were also prepared.…”

Section: Hydrogel Preparationmentioning

confidence: 99%

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A Novel Hydrogel Based on Renewable Materials for Agricultural Application

Duřpeková

Filatova

Císař

et al. 2020

International Journal of Polymer Science

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This study details the design and characterization of a new, biodegradable, and renewable whey/cellulose-based hydrogel (i.e., agricultural hydrogel). This was formulated from cellulose derivatives (carboxymethylcellulose (CMC) and hydroxyethylcellulose (HEC)) and acid whey cross-linked with citric acid, with the aim to obtain an agricultural product with a high swelling capacity to uphold the quality of soil and conserve water resources. With regard to the swelling behaviour of the prepared hydrogels, the authors initially assessed the swelling ratio and capacity for water uptake. Evaluating the chemical structure of the hydrogel and its thermal and viscoelastic properties involved performing Fourier transform infrared spectroscopy, differential scanning colorimetry, thermal gravimetric analysis, and rheological measurement of the hydrogel films. According to preliminary results, sufficient swelling capacity and stiffness were observed in a hydrogel prepared with 3% CMC and HEC, cross-linked with 5% citric acid. Moreover, the kinetics of water uptake revealed a promising capacity that was sustainable after 5 drying and swelling cycles. The results confirmed that the stability of the hydrogel was enhanced by the presence of the citric acid. As a consequence, it is necessary to utilize an appropriate cross-linking concentration and abide by certain conditions to ensure the swelling properties of the prepared hydrogel are sufficient. Further investigation of the topic, especially in relation to applications in soil, could confirm if the whey-cellulose-based hydrogel is actually suitable for agricultural use, thereby contributing to the advancement of sustainable arable farming.

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Section: Resultsmentioning

confidence: 78%

Section: Hydrogel Preparationmentioning

confidence: 99%

A Novel Hydrogel Based on Renewable Materials for Agricultural Application

Duřpeková

Filatova

Císař

et al. 2020

International Journal of Polymer Science

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“…When hydrogels are used as a drug delivery, one of the main factors that will affect their structure, the degree of ionization of their functional groups and the environment in which the immobilized biologically active substances are exposed is the pH of the environment [17]. In this regard, the dependence of the degree of swelling of the synthesized CS-based gels on the pH of the medium was studied.…”

Section: Resultsmentioning

confidence: 99%

Obtaining a Hydrogel Based on Chitosan, Study Its Structure and Sorbtion Ability With Levofloxacin Antibiotics

Mammadova¹,

Seyidova²,

Guliyeva³

et al. 2021

Chemical Problems

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Network polymer hydrogels with high swelling effect were synthesized by using of ultraviolet crosslinking, with crosslinking agent N,N'-methylene-bis-acrylamide with chitosan an average molecular weight of 100-300 kDa t. The amount of crosslinking agent made up 10% of chitosan weight. The gel structure was studied using FTIR and the mechanism of the cross-linking process identified. The sorption of levofloxacin on the obtained hydrogel was studied at different pH and the degree of sorption and the dependence of the sorption capacity of the hydrogel on the pH of the medium was studied. It found that the degree of sorption of hydrogel by levofloxacin is 90.4 % while the sorption capacity of gel increases as pH of the medium rises and at pH=8 it has the highest value equal to 8.9 mg/g.

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“…Polyacrylic acid (PAA; Figure ) is another synthetic hydrophilic polymer used to create superabsorbent gels for nappies and cosmetics under the commercial name “carbomer.”61 Carbomers are traditionally synthesized in a benzene solvent, raising issues for medical applications. Other solvents, such as ethyl acetate and cyclohexane,62 can be used as an alternative. Most commercial drops that describe themselves as “gel” drops use carbomers.…”

Section: Topical Ocular Drug Delivery: Eye Dropsmentioning

confidence: 99%

Material, Immunological, and Practical Perspectives on Eye Drop Formulation

Bennett

Chinnery

Downie

et al. 2020

Adv Funct Materials

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Eye drops are the most common and inexpensive approach to topical ocular drug delivery. Eye drops offer a noninvasive treatment strategy; however, this can be detrimental to therapeutic efficacy when compared to invasive methods such as surgeries, implants, and injections. Improvements to the efficacy of the topical delivery of drugs to ocular tissues are currently being explored and much of this work centers on adjusting the formulation of the eye drops and prolonging the bioavailability of the therapeutic agent. This is often in preference to improving other patient‐focused or clinical factors. In this progress report, conventional, commercially available polymer eye drops are explored and the ability for current and future innovations to maintain the existing benefits of eye drops to the patient is assessed. The final materials and form of the drops (liquid, gel, or other) and the immunological implications for the user are explored. There is currently no consensus for how to most effectively improve the ocular retention and drug delivery capabilities of eye drops, but key issues are highlighted in the context of current methods under development, and potential questions and considerations for future innovations are raised.

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Synthesis, Structure and Swelling Properties of Hydrogels Based on Polyacrylic Acid

Cited by 6 publications

References 0 publications

A Novel Hydrogel Based on Renewable Materials for Agricultural Application

A Novel Hydrogel Based on Renewable Materials for Agricultural Application

Obtaining a Hydrogel Based on Chitosan, Study Its Structure and Sorbtion Ability With Levofloxacin Antibiotics

Material, Immunological, and Practical Perspectives on Eye Drop Formulation

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