Biodegradable hydrogel derived from cellulose acetate and EDTA as a reduction substrate of leaching NPK compound fertilizer and water retention in soil

Senna, André M.; Botaro, Vagner Roberto

doi:10.1016/j.jconrel.2017.06.009

Cited by 65 publications

(46 citation statements)

References 14 publications

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“…and polydopamine (Timilsena et al, 2015). Besides these, many types of biodegradable polymers have been tested (Donida et al, 2002;Majeed et al, 2015;Senna and Botaro, 2017;Mesias et al, 2019;Ibrahim et al, 2020), they are usually categorized as degradable synthetic polymers with a small permeability coefficient (biopols, polylactic acids, and polycaprolactone), and modified polysaccharides with a higher permeability coefficient (alginates, starches, agar) (Devassine et al, 2002). Zhang et al (2016a) reported developing a polymer-coated N fertilizer using biobased polyurethane derived from liquefied locust sawdust as carrier material and found that this fertilizer was more efficient than urea at supplying N to maize.…”

Section: Accepted Papermentioning

confidence: 99%

Smart fertilizers: What should we mean and where should we go?

et al. 2021

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Highlights- A smart fertilizer allows to control the rate, timing and duration of nutrients release.- Nanofertilizers are powder or liquid formulations which involve the synthesis, design and use of materials at the nanoscale level.- Composite fertilizers are formulations containing nutrients mixed or coated with one or more materials that exploit synergy among materials.- Bioformulations are fertilizers containing active or dormant microorganisms capable to trigger physiological growth responses in plants.- Limited information is available for smart fertilizers on herbaceous crops in open field conditions. Abstract The current agricultural system faces several challenges, the most important being the ability to feed the increasing world population and mitigate climate change. In this context, the improvement of fertilizers’ agronomic efficiency while reducing their cost and environmental impact is one of the biggest tasks. Available literature shows that many efforts have been made to develop innovative fertilizers defined as "smart fertilizers", for which, different interpretations and definitions have been used. This paper aims to define, classify, and describe the new frontier of the so-called smart fertilizers with a particular focus on field-scale studies on herbaceous species. Most of the analyzed papers associate the "smart" concept to the controlled and/or slow release of nutrients, using both terms as synonymous. Some others broadened the concept, including the controlled release of nutrients to reduce the environmental impact. Based on our critical analysis of the available literature, we conclude that a fertilizer can be considered "smart" whenapplied to the soil, it allows control over the rate, timing, and duration of nutrients release. Our new definition is: ‘Smart fertilizer is any single or composed (sub)nanomaterial, multi-component, and/or bioformulation containing one or more nutrients that, through physical, chemical, and/or biological processes, can adapt the timing of nutrient release to the plant nutrient demand, enhancing the agronomic yields and reducing the environmental impact at sustainable costs when compared to conventional fertilizers’.

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Section: Accepted Papermentioning

confidence: 99%

Smart fertilizers: What should we mean and where should we go?

et al. 2021

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“…The covalently crosslinked hydrogels present strong bonds and three-dimensional networks (Senna et al, 2014;Senna and Botaro, 2017). The microstructure of these hydrogels allows effective diffusion of uids and a minimum decrease of their mechanical properties and dimensional stability.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional Hydrogels of Alginate/chitosan Semi-interpenetrating Polymer Networks and Nanocelluloses

Siqueira

Lima

Medeiros

et al. 2021

Preprint

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The hydrogels are advanced materials used in biomedical applications during wound healing, controlled drug release and to prepare scaffolds. In this work are prepared hydrogels of alginate/chitosan (Alg/Ch) semi-interpenetrating polymer networks (semi-IPN’s) and nanocelluloses. The hydrogels after preparation by freeze drying are namely simply as gels. The cellulose nanocrystals (CNC’s) are obtained from acid hydrolysis of bleached Eucalyptus pulps and oxidized cellulose nanocrystals (CNCT’s) prepared by (2,2,6,6-tetramethylpiperidin-1-yl)oxyl radical catalyzed reaction as known as TEMPO reaction. The cellulose nanofibers (NFC’s) are obtained from mechanical shearing of cellulose pulps and oxidized NFC’s by TEMPO-mediated reaction (NFCT’s). The nanocellulose suspension and gels are characterized by FTIR at ATR mode, TGA, XRD, TEM, SEM, X-ray computed microtomography (micro-CT) and DMTA. The addition of CNC’s, NFC’s, CNCT’s or NFCT’s in the microstructure of gels increases their dimensional stabilities. The best results are obtained when CNCT’s and NFCT’s are added. The mechanical properties and dimensional stability of Alg/Ch semi-IPN’s increase after controlled thermal post-treatment. The heating during thermal post-treatment boosts the physicochemical interactions in the microstructures of semi-IPN’s. The biological assays show biocompatibility of fibroblast cells on the substrates, and differentiation and proliferation up seven days. The optimized mechanical properties, dimensional stability and biocompatibility of the gels studied in this work are important parameters for potential biomedical applications of these biomaterials.

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“…In three-dimensional networks, this increase of covalent bonds forms normally linear subsets, which are responsible for separating the adjacent junction points [11]. By means of junction points, the macromolecules interact with each other due to the covalent bonds [11].…”

Section: Introductionmentioning

confidence: 99%

“…e formation of polymer networks is determined by the type of synthesis performed and by the presence of reagents capable of branching the molecular structures, thus forming the polymer networks, which can be formed by crosslinking or functional group polymerization (endlinking) [11,12].…”

Section: Introductionmentioning

confidence: 99%

Chelating Effect of Cellulose Acetate Hydrogel Crosslinked with EDTA Dianhydride Used as a Platform for Cell Growth

Melero

Senna

Domingues

et al. 2019

Advances in Materials Science and Engineering

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The use of biomaterials capable of achieving controlled release of drugs or chemical and physical interactions with living organisms causes these new materials to be studied in depth to better target their future applications. An example of this is the use of materials that have in their physical structure elements with chelating effects, capable of interacting with the ions and cations present in the cell culture media, drugs, and other elements capable of interacting with the human body. In this work, cellulose acetate hydrogel (HAC) crosslinked with EDTAD (ethylenediaminetetraacetic acid dianhydride) showed a significant chelating effect capable of altering the adhesion of mesenchymal cells in the first days of in vitro tests. This result became our main question in this work, and by using new cell viability assays, it was verified that the hydrogel interacted with the culture medium, removed the salts present, such as Ca2+ and Mg2+, and promoted a decrease in the amount of cells adhered to the material but not cell death. After saturation of Ca2+ and Mg2+, we obtained an improvement in cell adhesion. Electrochemical impedance spectroscopy (EIS) results also verified the dynamics of linked or mobile loads in the volume and interface regions of HAC-EDTA and the presence of characteristic bands related to the interaction between calcium and magnesium present in the culture medium with HAC-EDTA. The DMA traction test showed that there was no dynamic-mechanical change in the structure of the material at temperatures between 20 and 60°C, which is ideal for this studied biomaterial. The purpose of these tests is to aid in the characterization of future biomaterials, where the physicochemical interaction of some of them is often confused with a false cytotoxicity, which in fact may only be an easily identifiable and adaptable structural feature.

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Biodegradable hydrogel derived from cellulose acetate and EDTA as a reduction substrate of leaching NPK compound fertilizer and water retention in soil

Cited by 65 publications

References 14 publications

Smart fertilizers: What should we mean and where should we go?

Smart fertilizers: What should we mean and where should we go?

Three-dimensional Hydrogels of Alginate/chitosan Semi-interpenetrating Polymer Networks and Nanocelluloses

Chelating Effect of Cellulose Acetate Hydrogel Crosslinked with EDTA Dianhydride Used as a Platform for Cell Growth

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