Synthesis, characterization, and morphology study of coco peat-grafted-poly(acrylic acid)/NPK slow release fertilizer hydrogel

Ramli, Ros Azlinawati; Lian, Yuen Mei; Nor, Noraishah Mohamad; Azman, Noor

doi:10.1007/s10965-019-1952-9

Cited by 16 publications

(7 citation statements)

References 32 publications

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“…Thus, it reduces the mobility of the polymer chain of PAA. 46,48,56,61,62,71 Nevertheless, a different phenomenon was found by Deepa et al 42 They obtained the decrease of Tg values on polysulfone-poly(acrylic acid-co-2-(2-(piperazin-1-yl) ethylamino)-2-hydroxyethyl methacrylate). This phenomenon may be caused by the intermolecular interactions from aliphatic chain segments of the copolymer.…”

Section: Resultsmentioning

confidence: 86%

Thermal studies of hydrogels based on poly(acrylic acid) and its copolymers by differential scanning calorimetry: A systematic literature review

Sulaeman

Putro

Nikmatin

2022

Polymers and Polymer Composites

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This systematic literature review aims to study the thermal properties (TP) of poly(acrylic acid)-based hydrogels (PAA) by differential scanning calorimetry. The data sources were obtained from Google Scholar via Publish or Perish software from 2018 to 2020. The synthesis results show that most of the analysis of TP in PAA-based hydrogel consists of glass transition temperature ([Formula: see text]), melting temperature ([Formula: see text]), and enthalpy ([Formula: see text]). The subsequent thermal properties analysis is important for a new development and depth study in the future application.

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Section: Resultsmentioning

confidence: 86%

Thermal studies of hydrogels based on poly(acrylic acid) and its copolymers by differential scanning calorimetry: A systematic literature review

Sulaeman

Putro

Nikmatin

2022

Polymers and Polymer Composites

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“…The deposition of NPK fertilizer and the crystals of their constituents deposited onto pores walls were also observed in the swollen state in the higher magnification [45,51]. The surface roughness also increased after LH addition (Figure 3c) which can suppose the swelling ability of the superabsorbent (see Section 2.3.).…”

Section: Sem Analysismentioning

confidence: 80%

“…A similar effect on the surface morphology of superabsorbent polymers (if inorganic nutrients were incorporated in them) was observed in refs. [45,50,51].…”

Section: Sem Analysismentioning

confidence: 99%

Functional Hydrogels for Agricultural Application

Kratochvílová

Kráčalík

Smilková

et al. 2023

Gels

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Ten different hydrogels were prepared and analyzed from the point of view of their use in soil. FT-IR spectra, morphology, swelling ability, and rheological properties were determined for their characterization and appraisal of their stability. The aim was to characterize prepared materials containing different amounts of NPK as mineral fertilizer, lignohumate as a source of organic carbon, and its combination. This study of stability was focused on utility properties in their application in soil—repeated drying/re-swelling cycles and possible freezing in winter. Lignohumate supported the water absorbency, while the addition of NPK caused a negative effect. Pore sizes decreased with NPK addition. Lignohumate incorporated into polymers resulted in a much miscellaneous structure, rich in different pores and voids of with a wide range of sizes. NPK fertilizer supported the elastic character of prepared materials, while the addition of lignohumate shifted their rheological behavior to more liquid. Both dynamic moduli decreased in time. The most stable samples appeared to contain only one fertilizer constituent (NPK or lignohumate). Repeated re-swelling resulted in an increase in elastic character, which was connected with the gradual release of fertilizers. A similar effect was observed with samples that were frozen and defrosted, except samples containing a higher amount of NPK without lignohumate. A positive effect of acrylamide on superabsorbent properties was not confirmed.

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“…By considering this, RC hydrogel has become the center of attention for researchers in developing SRF for the agriculture industry. Ramli and co-workers used coco peat fiber as the cellulose source to produce RC-SAH via in-situ solution polymerization technique grafted-poly(acrylic acid)/Nitrogen-Phosphorus-Potassium (NPK) SFRH [ 143 ]. The coco peat fiber-SRFH showed a homogenous network, thick and smaller pore sizes that limit the water penetration to reduce the fertilizer release up to five weeks and concur an excellent mechanical property.…”

Section: The Potential Applications Of Regenerated Cellulose Products For Agriculturementioning

confidence: 99%

“…The high porosity of SRF/CRF-RC-coated reduces the release rate of fertilizer as Aini et al (2019) showed large pore of rice straw cellulose/urea beads had caused an increase in the urea diffusion rate [ 147 ]. Pores promote water diffusion into the network, which results in more water absorption and increases the swelling rate of hydrogel [ 143 ]. Therefore, the hydrogels formed should have small porosity and high gel strength to ensure the release rate for fertilizer decreases.…”

Section: The Potential Applications Of Regenerated Cellulose Products For Agriculturementioning

confidence: 99%

Regenerated Cellulose Products for Agricultural and Their Potential: A Review

et al. 2021

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Cellulose is one of the most abundant natural polymers with excellent biocompatibility, non-toxicity, flexibility, and renewable source. Regenerated cellulose (RC) products result from the dissolution-regeneration process risen from solvent and anti-solvent reagents, respectively. The regeneration process changes the cellulose chain conformation from cellulose I to cellulose II, leads the structure to have more amorphous regions with improved crystallinity, and inclines towards extensive modification on the RC products such as hydrogel, aerogel, cryogel, xerogel, fibers, membrane, and thin film. Recently, RC products are accentuated to be used in the agriculture field to develop future sustainable agriculture as alternatives to conventional agriculture systems. However, different solvent types and production techniques have great influences on the end properties of RC products. Besides, the fabrication of RC products from solely RC lacks excellent mechanical characteristics. Thus, the flexibility of RC has allowed it to be homogenously blended with other materials to enhance the final products’ properties. This review will summarize the properties and preparation of potential RC-based products that reflect its application to replace soil the plantation medium, govern the release of the fertilizer, provide protection on crops and act as biosensors.

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Synthesis, characterization, and morphology study of coco peat-grafted-poly(acrylic acid)/NPK slow release fertilizer hydrogel

Cited by 16 publications

References 32 publications

Thermal studies of hydrogels based on poly(acrylic acid) and its copolymers by differential scanning calorimetry: A systematic literature review

Thermal studies of hydrogels based on poly(acrylic acid) and its copolymers by differential scanning calorimetry: A systematic literature review

Functional Hydrogels for Agricultural Application

Regenerated Cellulose Products for Agricultural and Their Potential: A Review

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