Macroporous alginate-based hydrogels to control soil substrate moisture: Effect on lettuce plants under drought stress

Tomadoni, Bárbara María; Salcedo, María Florencia; Mansilla, Andrea Yamila; Casalongué, Claudia Anahí; Álvarez, Vera A.

doi:10.1016/j.eurpolymj.2020.109953

Cited by 26 publications

(22 citation statements)

References 35 publications

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“…However, the value after 4 h of diffusion of CIP–SPG 2/8/0 was significantly higher than that of the other samples ( p < 0.05). The degree of swelling of the nanofiber mats did seem considerably high but not much as presented in other works [35,36]. The alginate/gelatin scaffolds crosslinked by CaCl 2 for use in soft tissue engineering exhibited a degree of swelling of about 800% in Hank’s balanced salt solution (HBSS) at 37°C [35].…”

Section: Resultsmentioning

confidence: 93%

“…The alginate/gelatin scaffolds crosslinked by CaCl 2 for use in soft tissue engineering exhibited a degree of swelling of about 800% in Hank’s balanced salt solution (HBSS) at 37°C [35]. The degree of swelling of the alginate-based hydrogels crosslinked with CaCl 2 immersed in tap water for 4 h at 25°C were about 33 gram of water/gram of dry hydrogel which were equivalent to 3300% [36].…”

Section: Resultsmentioning

confidence: 99%

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Ciprofloxacin-loaded alginate/poly (vinyl alcohol)/gelatin electrospun nanofiber mats as antibacterial wound dressings

Thairin

Wutticharoenmongkol

2021

Journal of Industrial Textiles

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Herein, ciprofloxacin (CIP)-loaded alginate/poly (vinyl alcohol)/gelatin (SPG) (CIP–SPG) nanofiber mats were successfully fabricated by electrospinning. The average fiber diameters of the mats before and after crosslinking were in the range of 190–260 and 385–484 nm, respectively. The chemical integrity of CIP remained intact after encapsulation into the mats. The degree of weight loss and water swelling decreased with an increase in the gelatin content of the electrospun nanofiber mats. A release study was carried out by total immersion and diffusion methods using phosphate buffer as a release medium. Burst release of CIP was observed in case of the total immersion method, while a more sustained release was observed in case of the diffusion method. The maximum amounts of CIP released during total immersion and diffusion were in the range of 70–90% and 72–85%, respectively. For both the total immersion and diffusion methods, the released amounts of CIP decreased and the release slowed down with an increase in the gelatin content; this result is consistent with the weight loss and water swelling values. The Young’s modulus increased, while the tensile strength and strain at break decreased with an increase in the gelatin content. The CIP–SPG nanofiber mats were slightly toxic to L929 mouse fibroblasts as evaluated by indirect cytotoxicity assay. The electrospun CIP–SPG nanofiber mats exhibited excellent antimicrobial activity against Staphylococcus aureus and Escherichia coli. These results reveal that the electrospun CIP–SPG nanofiber mats are potentially promising materials for wound healing applications.

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Section: Resultsmentioning

confidence: 93%

Section: Resultsmentioning

confidence: 99%

Ciprofloxacin-loaded alginate/poly (vinyl alcohol)/gelatin electrospun nanofiber mats as antibacterial wound dressings

Thairin

Wutticharoenmongkol

2021

Journal of Industrial Textiles

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“…SAPs are mainly used as water reservoirs under soil for plants. 41 The unique swelling and retaining characteristics of superabsorbent polymers make them suitable for agricultural applications. Water is one of the essential parameters in plant growth for the uptake of nutritive elements.…”

Section: Introductionmentioning

confidence: 99%

Triblock Superabsorbent Polymer Nanocomposites with Enhanced Water Retention Capacities and Rheological Characteristics

Menceloğlu

Seven

2022

ACS Omega

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Superabsorbent polymers (SAPs) are useful polymers in a wide range of application fields ranging from the hygiene industry to construction and agriculture. As versatility and high water absorption capacity are their important merits, SAPs usually suffer from low water retention capacity (fast release) and weak mechanical properties. To address these drawbacks, a set of new superabsorbent polymer–Halloysite nanotube (HNT) nanocomposites was synthesized via free radical polymerization of acrylamide, 2-acrylamido-2-methylpropane-1-sulfonic acid, and acrylic acid in the presence of vinyltrimethoxysilane (VTMS) as the crosslinker. FTIR and TGA characterizations confirm the polymerization of SAP and successful incorporation of HNTs into the SAP polymer matrix. The effect of the HNT nanofiller amount in the nanocomposite polymer matrix was investigated with swelling–release performance tests, crosslink density calculations, and rheology measurements. It was found that equilibrium swelling ratios are correlated and therefore can be tuned via the crosslink densities of nanocomposites, while water retention capacities are governed by storage moduli. A maximum swelling of 537 g/g was observed when 5 wt % HNT was incorporated, in which the crosslink density is the lowest. Among the SAP nanocomposites prepared, the highest storage modulus was observed when 1 wt % of nanofiller was incorporated, which coincides with the nanocomposite with the longest water retention. The water release duration of SAPs was prolonged up to 27 days with 1% HNT addition in parallel with the achieved maximum storage modulus. Finally, three different incorporation mechanisms of the HNT nanofiller into the SAP nanocomposite structure were proposed and confirmed with rheology measurements. This study provides a rapid synthesis method for SAP nanocomposites with enhanced water retention capacities and explains the relationship between swelling and crosslink density and water retention and mechanical properties of SAP nanocomposites.

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“…11,14–18 Carboxymethyl cellulose (CMC), hydroxyethyl cellulose (HEC) and alginate-based biodegradable hydrogels have already established their property of nutrient uptake and delivery, along with excellent water holding capacity, non-toxicity, and renewability. 19–22 However, their versatile applicability is hindered by the low mechanical strength of the materials. The composite formulation of the LDH material with biodegradable hydrogels presents a mutual complementary system, where the LDH material induces mechanical stability in the composite, while the hydrogel polymer provides structural barrier with soil acidity, along with water retention property.…”

Section: Introductionmentioning

confidence: 99%

“…Several works improvising this concept have been reported. 19–22 . [Zn–Al–NO 3 − ]–LDH encapsulated with biodegradable alginate beads for enhanced nitrogen fertilization, 23 composites of norfloxacin-intercalated Mg–Al LDH with carboxymethyl cellulose, cross-linked by citric acid for biomedical applications, 24 carboxymethyl cellulose-based nanocomposite hydrogel beads with Cu–Al LDH for bacterial infection treatment 18 and several other layered nanocomposites are reported to have shown controlled release property.…”

Section: Introductionmentioning

confidence: 99%

Boosting nitrogen fertilization by a slow releasing nitrate-intercalated biocompatible layered double hydroxide–hydrogel composite loaded withAzospirillum brasilense

et al. 2022

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Macroporous alginate-based hydrogels to control soil substrate moisture: Effect on lettuce plants under drought stress

Cited by 26 publications

References 35 publications

Ciprofloxacin-loaded alginate/poly (vinyl alcohol)/gelatin electrospun nanofiber mats as antibacterial wound dressings

Ciprofloxacin-loaded alginate/poly (vinyl alcohol)/gelatin electrospun nanofiber mats as antibacterial wound dressings

Triblock Superabsorbent Polymer Nanocomposites with Enhanced Water Retention Capacities and Rheological Characteristics

Boosting nitrogen fertilization by a slow releasing nitrate-intercalated biocompatible layered double hydroxide–hydrogel composite loaded withAzospirillum brasilense

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