Radiation Crosslinking of Modifying Super Absorbent (Polyacrylamide/Gelatin) Hydrogel as Fertilizers Carrier and Soil Conditioner

El-Sayyad, Gharieb S.; El-Damhougy, Basem Kh.; Nady, Norhan; El‐Wahab, H. Abd; Naser, A. M.; Abdelhai, Farag

doi:10.1007/s10924-018-1273-9

Cited by 40 publications

(17 citation statements)

References 32 publications

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“…Comparing the TGA curves of CG, HCG and HCGP samples, it was observed that mass residue increases in the following order: CG < HCG < HCGP. This result indicates that HCGP had improved thermal stability [ 29 ]. The higher thermal stability of the HCGP compared to HCG may be attributed to the formation of crosslinks in the hydrogel matrix [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

“…PAM is a conventional hydrophilic polymeric substance that is used to obtain SAHs, mainly for application as soil conditioner [ 28 , 29 ]. Although PAM exhibits hydrogel formation capacity, chemical treatments, such as alkaline hydrolysis, have been suggested as a way to enhance the swelling of this synthetic polymer [ 29 ]. In general, SAH-based synthetic polymers have advantages, such as high swelling capacity and high durability [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

“…In addition, these macromolecules improve the biodegradability, hydrophilicity and biocompatibility of hydrogels [ 30 ]. Some studies have simulated the use of different polysaccharides in obtaining hydrogels, such as cellulose [ 31 ], alginate [ 32 ], gelatin [ 29 ], and chitosan [ 33 ]; different gums are also related [ 34 ]. Natural gums are polysaccharides that can be obtained from exudates and seeds of terrestrial plants, algae and microorganism fermentation.…”

Section: Introductionmentioning

confidence: 99%

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Superabsorbent Hydrogels Based to Polyacrylamide/Cashew Tree Gum for the Controlled Release of Water and Plant Nutrients

et al. 2021

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Agricultural production is influenced by the water content in the soil and availability of fertilizers. Thus, superabsorbent hydrogels, based on polyacrylamide, natural cashew tree gum (CG) and potassium hydrogen phosphate (PHP), as fertilizer and water releaser were developed. The structure, morphology, thermal stability and chemical composition of samples of polyacrylamide and cashew tree gum hydrogels with the presence of fertilizer (HCGP) and without fertilizer (HCG) were investigated, using X-ray diffractometry (XRD), Fourier Transformed Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Thermogravimetric Analysis (TGA/DTG) and Energy Dispersive Spectroscopy (EDS). Swelling/reswelling tests, textural analysis, effect of pH, release of nutrients and kinetics were determined; the ecotoxicity of the hydrogels was investigated by the Artemia salina test. The results showed that PHP incorporation in the hydrogel favored the crosslinking of chains. This increased the thermal stability in HCGP but decreased the hardness and adhesion properties. The HCGP demonstrated good swelling capacity (~15,000 times) and an excellent potential for reuse after fifty-five consecutive cycles. The swelling was favored in an alkaline pH due to the ionization of hydrophilic groups. The sustained release of phosphorus in HCGP was described by the Korsmeyer–Peppas model, and Fickian diffusion is the main fertilizer release mechanism. Finally, the hydrogels do not demonstrate toxicity, and HCGP has potential for application in agriculture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Superabsorbent Hydrogels Based to Polyacrylamide/Cashew Tree Gum for the Controlled Release of Water and Plant Nutrients

et al. 2021

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“…Results were statistically analyzed by calculating the analysis of variance in a completely randomized design by T ‐test (SPSS program Version 18). The amount of urea release was determined using the colorimetric assay as descript in previous article 21 …”

Section: Methodsmentioning

confidence: 99%

Controlling radiation degradation of aCMCsolution to optimize the swelling of acrylic acid hydrogel as water and fertilizer carriers

El-Sayyad

El-Damhougy

El‐Wahab

et al. 2020

Polymers for Advanced Techs

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A copolymer hydrogel consisting of Polyacrylic Acid (PAAc) combined with an irradiated solution of carboxymethyl cellulose (CMC, 1 wt%) was prepared. The focus was on controlling the radiation degradation of CMC by exposing it to different six doses of γ‐irradiation from 0 up to 3 kGy. After the irradiation process, the six CMC solution samples were mixed with 10 vol% of Acrylic Acid (AAc) monomer and re‐irradiated at a dose of 25 kGy to begin the polymerization process. A scanning electron microscope (SEM) was used to image the macroporous structure of the obtained (CMC/PAAc) hydrogel. Moreover, the SEM image confirmed the interpenetrating and semi‐interpenetrating polymer network structure based on the irradiation process. The controlled release of urea is achieved due to the binding between urea and the functional groups of the investigated hydrogel by hydrogen bonds. The growth of common bean plant (Phaseolus vulgaris L.) and chlorophyll contents were increased when soils were treated with (CMC/PAAc) compared with soils with free hydrogel in water‐stress conditions.

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“…Yang等 [12] 通过辐射诱导交联制备了明胶/CMCts水凝胶, 该水凝胶可促进细胞附着及成纤维细胞的生长. 另外, 由于AgNPs在伤口敷料中具有抗炎杀菌的作用, Alcântara等 [46] 通过辐射法制备了两种含有AgNPs的水凝胶(PVP/AgNPs和PVA/ AgNPs), 在辐照过程中, Ag + 还原形成纳米粒子, 图 13 豆苗在不含SAH水凝胶(a)及含SAH水凝胶(b)情况下的生长情况 [11] (网络版彩图) Figure 13 The growth of bean seedlings without SAH hydrogel (a) and with SAH hydrogel (b) [11] (color online). [59] 、人造皮肤 [60,61] 、生物分子、细胞的固定图 14 聚(NVP-co-AAP)水凝胶作为指关节(a)、手腕(b)、腿和脚(c)的固定支撑材料 [23] (网络版彩图) 图 15 Li 2 SO 4 -AG/PAM 双网络水凝胶的辐射合成及在超级电容器中的应用 [65] (网络版彩图) Figure 15 Radiation synthesis process of the Li 2 SO 4 -AG/PAM double network hydrogel electrolytes and its application in supercapacitors [65] (color online).…”

Section: 体自由基进一步与聚合物及纳米基材发生接枝共聚反应而形成水凝胶水溶液体系中水辐解生成的•Oh、unclassified

Research progress of radiation synthesis and application of hydrogels

Shi¹,

Lin²,

Peng³

et al. 2020

Sci. Sin.-Chim

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Radiation Crosslinking of Modifying Super Absorbent (Polyacrylamide/Gelatin) Hydrogel as Fertilizers Carrier and Soil Conditioner

Cited by 40 publications

References 32 publications

Superabsorbent Hydrogels Based to Polyacrylamide/Cashew Tree Gum for the Controlled Release of Water and Plant Nutrients

Superabsorbent Hydrogels Based to Polyacrylamide/Cashew Tree Gum for the Controlled Release of Water and Plant Nutrients

Controlling radiation degradation of aCMCsolution to optimize the swelling of acrylic acid hydrogel as water and fertilizer carriers

Research progress of radiation synthesis and application of hydrogels

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