Environmentally Friendly Chitosan-g-poly(acrylic acid-co-acrylamide)/Ground Basalt Superabsorbent Composite for Agricultural Applications

Said, Majd; Atassi, Yomen; Tally, Mohammad; Khatib, Hany

doi:10.1007/s10924-018-1269-5

Cited by 48 publications

(21 citation statements)

References 45 publications

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“…Another example of a CS graft copolymer was presented by Said et al [ 36 ] ( Table 1 , entry 4). Their superabsorbent composite was fabricated by incorporating ground basaltic rock, as a soil ameliorant, to a hydrogel based on CS grafted onto poly(AA-co-AM).…”

Section: Strategies For Fabricating Cs Hydrogels and Their Potentimentioning

confidence: 99%

A Mini-Review on Chitosan-Based Hydrogels with Potential for Sustainable Agricultural Applications

Michalik

Wandzik

2020

Polymers

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Agriculture is an important sector of the economy, but this industry consumes significant amounts of water, which is a precious and limited natural resource. Irrigation techniques and efforts to mitigate water usage influence the growth, survival, and yield of crops. However, superabsorbent polymers in combination with fertilizers can be employed to obtain sustained release of nutrients and improved water retention capacity of the soil. Despite significant recent progress in this area involving synthetic polyacrylate hydrogels, there are no industrially applicable solutions exhibiting similar performance using natural biopolymers or synthetic polymers enriched with natural components. This review focuses on biodegradable chitosan-based hydrogels (both natural and semi-synthetic), and discusses their potential agricultural and horticultural applications. The methods for synthesizing hydrogels via physical or chemical crosslinking, and the resulting functional properties of recently reported hydrogels, such as water retention and release of active ingredients, are presented herein.

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Section: Strategies For Fabricating Cs Hydrogels and Their Potentimentioning

confidence: 99%

A Mini-Review on Chitosan-Based Hydrogels with Potential for Sustainable Agricultural Applications

Michalik

Wandzik

2020

Polymers

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“…For example, see the reviews on the techniques of hydrogel polymerization (synthesis parameters, various cross-linking methods), [2] hydrogel microarchitecture (solvent casting/particle leaching, freeze-drying, gas foaming, or electrospinning), [3] and hydrogel nanofibers (synthesis, properties, and applications). [4] Polyacrylamide (PAAm) hydrogels can be used in many different areas ranging from oil recovery, [5][6][7] over medicine or landscape cultivation, [8][9][10][11] to waste water treatment. [12][13][14] Although acrylamide monomer (AAm) is neurotoxic, the PAAm polymer is non-toxic [15,16] and PAAm hydrogels are therefore widely used especially in medicine.…”

Section: Introductionmentioning

confidence: 99%

Polyacrylamide hydrogels prepared by varying water content during polymerization: Material characterization, reswelling ability, and aging resistance

Pěnkavová

Spalova

Tomas

et al. 2022

Polymer Engineering & Sci

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As easily fabricated, polyacrylamide (PAAm) hydrogels are widely used, especially in medicine. Material properties of these crosslinked polymers are usually tuned by varying monomer/crosslinker ratio during polymerization. However, the properties of resulting hydrogels are affected by an all-in composition of the reaction mixture. As the influence of water/monomer ratio has not been systematically studied yet, the objective of this study is to provide a comprehensive investigation of this way of hydrogel preparation together with a careful examination of resulting materials. The samples of PAAm hydrogels prepared with controlled contents of water in the reaction mixture vary in achieved swelling ratios (from 5 to 25) and rigidities (Young's modulus from 300 to 5 kPa). These material properties remain practically the same even if the hydrogels are dried and reswelled again. Performed long-time testing suggests that the PAAm hydrogels can be stored either in wet or dry state, however, to avoid possible degradation by polymer hydrolysis, they should be placed in darkness and stored at no more than room temperature. The prepared hydrogels swell more in NaCl solutions than in water. As this swelling/ shrinking behavior is reversible and independent of hydrogel history, it could be applied for remote control of hydrogel properties.

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“…Although these research trials have provided materials with improved properties, their use in the real-field application is not reached yet because PAA is a water soluble polymer, and is mechanically unstable for the agricultural-irrigation purposes. [16][17][18] For that target, Anasuya Sahoo et al 19 copolymerized acrylonitrile and acrylic acid using different feeding ratios. The results of this study indicated that the architecture of the copolymer is a very important factor to enhance the mechanical properties of the cast films.…”

Section: Introductionmentioning

confidence: 99%

“…The obtained polymer composite showed a more controlled liberation of the selected fertilizer and improved the efficiency of soil water holding. Although these research trials have provided materials with improved properties, their use in the real‐field application is not reached yet because PAA is a water soluble polymer, and is mechanically unstable for the agricultural‐irrigation purposes 16–18 . For that target, Anasuya Sahoo et al 19 copolymerized acrylonitrile and acrylic acid using different feeding ratios.…”

Section: Introductionmentioning

confidence: 99%

Mechanically stable membranes of polyacrylic acid‐grafted chitosan‐functionalized carbon nanotubes with remarkable water storage capacity in sandy soils

Alsohaimi

Hafez

Berber

2020

J of Applied Polymer Sci

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Polyacrylic acid (PAA) is one of the most exciting hydrophilic polymers for water control and conservation; however, it suffers from poor mechanical properties during the agricultural applications. For that purpose a series of PAA-based multiwalled carbon nanotubes (MWCNTs) membranes have synthesized via a grafting process of MWCNTs using chitosan (CS) polymer as a binder. The fabricated membranes have spectroscopically characterized by different techniques to confirm the composite structure. The MWCNTs content into the PAA membranes has played a pronounced effect on water absorptivity, swelling behavior, and mechanical properties. PAA membrane has showed a fourfold increase in yield-stress by the addition of 3 wt% PAA/CS/MWCNTs, while preserving a 91% of water absorptivity of PAA membrane. The soil applications of the PAA/CS/MWCNTs membranes have showed remarkable improvements in soil moisture content compared to the PAA membrane. This study provides a promising pathway for future field applications, especially in arid lands.

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Environmentally Friendly Chitosan-g-poly(acrylic acid-co-acrylamide)/Ground Basalt Superabsorbent Composite for Agricultural Applications

Cited by 48 publications

References 45 publications

A Mini-Review on Chitosan-Based Hydrogels with Potential for Sustainable Agricultural Applications

A Mini-Review on Chitosan-Based Hydrogels with Potential for Sustainable Agricultural Applications

Polyacrylamide hydrogels prepared by varying water content during polymerization: Material characterization, reswelling ability, and aging resistance

Mechanically stable membranes of polyacrylic acid‐grafted chitosan‐functionalized carbon nanotubes with remarkable water storage capacity in sandy soils

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