Comparison of Copper-crosslinked Carboxymethyl Cellulose Versus Biopolymer-based Hydrogels for Controlled Release of Fertilizer

Basta, Altaf H.; Lotfy, Vivian F.; El-Dewany, Camilia

doi:10.1080/25740881.2021.1934017

Cited by 21 publications

(14 citation statements)

References 45 publications

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“…Based on thanks to unique properties of graphene oxide (GO) such as strong mechanical properties, optical properties, chemical functionalization capability and extremely large surface area which discussed in the literature (Kim et al , 2011; Basta et al, 2021a, 2021b, 2021c, 2021d, 2021e), this promising finding persuades us for further examining the role of incorporating GO on liquid crystal property of esterified hydroxypropyl cellulose (EHPC18). Figure 10 showed that incorporation of GO hasn't any effect on critical concentration, consequently on optical properties of EHPC18.…”

Section: Resultsmentioning

confidence: 99%

“…The functionalized paper, carbon nanostructures materials, semiconductor, water purification adsorbent, liquid crystal materials and the formaldehyde-free adhesive are literature applications for the cellulose-based products (Hosny et al , 1997; Vimala et al , 2009; Thakur et al , 2013; El-Saied et al , 2016; Canejo et al , 2017; Lotfy et al , 2018; Ravichandran et al , 2018; Basta et al , 2011, 2013, 2014, 2019; Ates et al , 2020). Additionally, there are medical and agriculture applications for the cellulose and its derivatives which are produced in form of hydrogel formulation (Lotfy and Basta, 2020; Lotfy et al , 2020; Hanna et al , 2020; Khalf-Alla et al , 2020; Basta et al , 2020, 2021a, 2021b, 2021c, 2021d, 2021e; Basta and Lotfy, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…According to optical properties, HPC was the first cellulosic derivative reported to form spontaneous anisotropic solutions when dissolved in aqueous and organic solvents. Interestingly, HPC is readily capable of forming a cholesteric type of liquid-crystalline phase (LC) both in a variety of common solvents such as acetic acid, N , N dimethylacetamide, water and dichloroacetic acid as lyotropic and in melts thermotropic (Werbowyj and Gray, 1976; Bheda et al , 1980; Chiba et al , 2006; Zhang et al , 2013; Basta et al , 2021a, 2021b, 2021c, 2021d, 2021e). In general, the chirality of cellulose chains could be considered playing an important role in inducing the formation of cholesteric LC phases.…”

Section: Introductionmentioning

confidence: 99%

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Selective route for enhancing liquid crystal-based hydroxylpropyl cellulose by esterification

Basta

Lotfy

Micky

et al. 2022

PRT

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Purpose This paper aims to study the effect of hydrolysis route of hydroxypropyl cellulose (HPC) on its esterification performance as liquid crystal material. The assessment was carried out from the data of spectra (Fourier-transform infrared analysis [FTIR] and 1H-nuclear magnetic resonance [1H-NMR]), thermal stability as well as optical properties via forming ordered mesophases at lower concentration than HPC. Design/methodology/approach The HPC was hydrolyzed by hydrochloric acid-methanol at times 9 and 18 h, and the products were esterified by decanoyl chloride. The products of hydrolysis and the esterification were characterized by FTIR, NMR, nonisothermal analysis, thermo-gravimetric analysis (TGA) and polarizing microscope to evaluate the role of degree of substitution of HPC as a result of hydrolysis, on esterification degree, thermal stability and thermal and liquid crystal behavior of the final esterified HPC. Findings The pretreatment by acid hydrolysis of HPC was successful for synthesizing novel cholesteric hydroxypropyl cellulose ester. The data of FTIR and TGA thermal analysis proved that hydrolysis and esterification of HPC with the decanoyl chain significantly enhanced crystallinity of this cellulose derivative from 0.57 to (1.7–1.9). Moreover, they provided products with superior thermal stability than pure HPC, as noticed from increasing the activation energy of degradation (Ea) from 514.3 to 806.2 kJ/mol. The NMR measurement proved that hydrolysis of HPC for 9 and 18 h decreased the degree of substitution from 3 to 2.1 and 1.3, respectively. Moreover, the esterified HPC showed a promising birefringence texture (chiral nematic) besides decreasing the critical concentration from 30% for HPC to 10% for the esterified unhydrolyzed HPC, while superior decreasing to 1–5% was observed for the esterified hydrolyzed HPC. Research limitations/implications There are two stages for preparation of decanoyl ester hydroxypropyl cellulose. At the first stage, HPC was treated by hydrochloric acid-methanol in ratio 1:10 at times 9 and18 h. At the second stage, HPC and hydrolyzed HPC were refluxed with decanoyl chloride (1:6) in presence of nitrogen atmosphere. The final product was precipitated by distilled water. Practical implications There are two stages for preparation of decanoyl ester hydroxypropyl cellulose. At the first stage, HPC was treated by hydrochloric acid-methanol in ratio 1:10 at times 9 and18 h. At the second stage, HPC and hydrolyzed HPC were refluxed with decanoyl chloride (1:6) in presence of nitrogen atmosphere. The final product was precipitated by distilled water. Originality/value The novelty of this work was focused on enhancing the crystallinity, thermal stability and liquid crystal behavior of esterified HPC, via decreasing the degree of substitution and consequently the type of OH group subjected to esterification. The decanoyl ester formation from the hydrolyzed hydroxypropyl cellulose is able to form ordered mesophases at even low concentration (promising birefringence texture at concentrations 1–5%). It is worthy to notice that the investigated route is able to omit the role of graphene oxide in promoting the liquid crystal behavior of HPC, as it hasn't any effect on critical concentration. This work will promote the use of HPC in technological applications, e.g. high modulus fibers and electronic devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Selective route for enhancing liquid crystal-based hydroxylpropyl cellulose by esterification

Basta

Lotfy

Micky

et al. 2022

PRT

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“…Previous research has described biopolymers as fertilizer carriers, such as adopting tapioca Starch and polyvinyl alcohol encapsulated biodegradable nanocomposites [9], biopolymer-based hydrogels [10], copper-cross-linked carboxymethyl cellulose [11], chelating and ammoxidation of lignin [12], chitosan and graphene oxide nanocomposites [13] and several other possibilities. The citric acid was applied as a wrapper to develop the controlled fertilizer-covered granules utilizing advanced technologies such as rotary uidized bed (RFB) [14].…”

Section: Introductionmentioning

confidence: 99%

Ginger extracted oil as an alternative for the emulsion to prepare chitosan microspheres for urea controlled release fertilizer

Chai

Luo

et al. 2022

Preprint

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The study aimed to evaluate the potential of ginger essential oil in urea loading efficacy to prepare the controlled release chitosan microspheres. The ginger oil was extracted by applying the Clevenger apparatus for hydro-distillation, and the chemical composition was characterized by using FT-IR. The chitosan microspheres and urea loaded were formulated through modified emulsification and followed cross-linking procedure. Response surface test was used to evaluate various factors and levels related to preparation of microspheres. The nitrogen content, yield were observed in the present study. Furthermore, SEM and FT-IR were applied to characterize the microspheres. The results showed that the yield of the ginger oil was 6.0% and citral was observed as the most enriched compound, 89.05% in oil. Response surface analysis showed that the optimum preparation conditions were as follows: 2.094% of Span-80, 2.302% of acetic acid, and the crosslinking agent ratio of formaldehyde to glutaraldehyde was 1:8.148. Under these conditions, the theoretical value of nitrogen content of urea-loaded chitosan microspheres was 4.683%. The FT-IR results proved the authenticity of ginger oil, chitosan microspheres, and urea-loaded microspheres. The morphology of the microspheres was better in lower oil concentrations. The release test showed urea diffused uniformly in the microspheres after 48 hours. It is concluded that controlled release fertilizers can be formulated using ginger oil.

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“…21 This property is related to + N(CH 3 ) 3 groups included in its network, which can interact with anionic polymers to form a hydrogel as a drug delivery system. 22,23 The literature has proved the behavior of TMC against the growth of some microorganisms (e.g. Listeria monocytogenes and Escherichia coli (O157:H7)), including the most frequent foodborne pathogens that are detected in cheese, milk, undercooked meat and spinach.…”

Section: Introductionmentioning

confidence: 99%

Impact of amino acids on enhancing trimethyl chitosan as a nontoxic antiproliferative active biopolymer

Basta

Lotfy

El-Manawaty

et al. 2021

Biofuels Bioprod Bioref

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This work evaluates the toxicity of trimethyl chitosan (TMC), which prevents its use as an antiproliferative active compound. We report our trial to enhance its safe application by chelating with various amino acids (phenylalanine, glycine and lysine). The safety evaluation was achieved by studying the behavior of TMC-amino acid chelates against two normal human cell lines (BJ1 and RPE1), in comparison with a negative control and doxrobicin (positive control) standard samples. The results obtained show that phenylalanine and lysine play an effective role in enhancing the safety of TMC against normal cell lines, together with providing high thermal stability. Phenylalanine is superior in synthesized anticancer agents. It had IC 50 values against colon HCT116 and breast cancer MCF-7cancer cell lines of 68.7 and 51.4 μg mL -1 This compound is more acceptable than the previous reported rutin flavonoid as an anticancer agent against HCT116 cell lines.

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Comparison of Copper-crosslinked Carboxymethyl Cellulose Versus Biopolymer-based Hydrogels for Controlled Release of Fertilizer

Cited by 21 publications

References 45 publications

Selective route for enhancing liquid crystal-based hydroxylpropyl cellulose by esterification

Selective route for enhancing liquid crystal-based hydroxylpropyl cellulose by esterification

Ginger extracted oil as an alternative for the emulsion to prepare chitosan microspheres for urea controlled release fertilizer

Impact of amino acids on enhancing trimethyl chitosan as a nontoxic antiproliferative active biopolymer

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