Preparation of hydroxyethyl cellulose/ mangiferin edible films and their antimicrobial properties

Tohamy, Hebat-Allah S.; El‐Sakhawy, Mohamed; El-Masry, Hossam Mohammed; Saleh, İbrahim; AbdelMohsen, Mona M.

doi:10.1186/s13065-022-00907-w

Cited by 10 publications

(8 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The empirical crystallinity index (LOI) and mean hydrogen bond strength (MHBS) were calculated according to the following equations:

LOI = \frac{A_{1425}}{A_{900}}

MHBS = \frac{A_{OH}}{A_{CH}}

where A 1425 and A 900 refer to the FTIR absorbance at 1425 and 900 cm −1 . In addition, A OH and A CH refer to the FTIR absorbance for the OH and CH peaks (Tohamy, El‐Sakhawy, El‐Masry, et al, 2022).…”

Section: Methodsmentioning

confidence: 99%

“…where A 1425 and A 900 refer to the FTIR absorbance at 1425 and 900 cm À1 . In addition, A OH and A CH refer to the FTIR absorbance for the OH and CH peaks (Tohamy, El-Sakhawy, El-Masry, et al, 2022).…”

Section: Cmc-oxalate As a Dispersant In O/w Emulsionmentioning

confidence: 99%

“…where A C is the crystalline peak area and A t is the total area (Tohamy, El-Sakhawy, El-Masry, et al, 2022;Tohamy, El-Sakhawy & Kamel, 2022b.…”

Section: Determination Of the Degree Of Substitution And Oxalate Perc...mentioning

confidence: 99%

“…In general, biodegradable polymers are used in the preparation of dispersants from low-cost agricultural wastes for oil spill cleanup (Wolok et al, 2020). Agricultural wastes are readily available resources that can be converted into beneficial substances for several different applications such as removal of water contaminants (Tohamy, 2022;Tohamy & Magar, 2022;Tohamy, El-Sakhawy, El-Masry, et al, 2022;Tohamy, El-Sakhawy & Kamel, 2022b, 2022c, 2022d. An example of agricultural waste is sugarcane bagasse (SC) which contains cellulose.…”

Section: Introductionmentioning

confidence: 99%

“…Cellulose contains both hydrophilic and hydrophobic groups: the equatorial (3-OH groups at C 6 , C 2 , and C 3 ) and axial (C H bonds) orientations of a glucopyranose ring, respectively. These properties impart amphiphilic behavior, therefore having a significant impact on how cellulose molecules interact with other hydrophilic and hydrophobic substances in water (Ioelovich, 2021;Neto et al, 2016;Tohamy, 2022;Tohamy, El-Sakhawy, El-Masry et al, 2022;Tohamy, El-Sakhawy & Kamel 2022c, 2022dUusi-Tarkka et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Oil dispersing and adsorption by carboxymethyl cellulose–oxalate nanofibrils/nanocrystals and their kinetics

Tohamy

2023

J Surfact & Detergents

View full text Add to dashboard Cite

The aim of our work is the preparation of cellulose nanofibrils or nanocrystals made from cellulose that is recovered from sugarcane bagasse agricultural waste (SC) as a dispersant instead of commercial cellulose for oil spill cleanup. In the current study, carboxymethyl cellulose was prepared by cellulose mercerization, which was then esterified by oxalic acid to create nanocellulose. Incorporation of oxalate into carboxymethyl cellulose (CMC) was verified by 1H‐NMR spectroscopy by the appearance of a new peak at 8.15 ppm for CMC–oxalate. The degree of substitution (DS) of oxalate was 0.17. The synthesized nanocellulose formed particles were roughly the same size and shape as both cellulose nanofibrils (CNFs) and cellulose nanocrystals (CNCs): measuring 321–480 nm in length and 4–5 nm in width. Emulsions of paraffins made from CMC–oxalate are stable up to 10 months without undergoing precipitation. CMC–oxalate had great thermal stability and worked well as a paraffin oil dispersant. CMC–oxalate provided a barrier around the oil droplet surface, which prevented droplets from coalescing. This hypothesis is supported by the contact angle measurement for the O/W emulsion formed by CMC–oxalate being 0°, which is lower than the value for emulsions formed by underivatized CMC, 37.20°. From transmission electron microscopy observations, O/W emulsions of paraffin oil were spherical in shape, and separated from each other by a distance of 30–100 nm. This study shows that CMC–oxalate can be prepared by a low‐cost method, yielding nanocellulose with characteristics that resemble CNFs and CNCs, thereby opening up new potential applications for cellulose nanomaterials.

show abstract

“…The empirical crystallinity index (LOI) and mean hydrogen bond strength (MHBS) were calculated according to the following equations:

LOI = \frac{A_{1425}}{A_{900}}

MHBS = \frac{A_{OH}}{A_{CH}}

Section: Methodsmentioning

confidence: 99%

Section: Cmc-oxalate As a Dispersant In O/w Emulsionmentioning

confidence: 99%

“…where A C is the crystalline peak area and A t is the total area (Tohamy, El-Sakhawy, El-Masry, et al, 2022;Tohamy, El-Sakhawy & Kamel, 2022b.…”

Section: Determination Of the Degree Of Substitution And Oxalate Perc...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Oil dispersing and adsorption by carboxymethyl cellulose–oxalate nanofibrils/nanocrystals and their kinetics

Tohamy

2023

J Surfact & Detergents

View full text Add to dashboard Cite

show abstract

Self‐assembled nanoparticles based on pullulan‐g‐poly(Z‐L‐lysine) for controlled drug delivery: Synthesis, characterization and preliminary studies on the encapsulation of indomethacin

Vieira,

Matos,

Carvalho

et al. 2024

J of Applied Polymer Sci

View full text Add to dashboard Cite

Novel biocompatible systems suitable for the controlled release of active ingredients are under the spotlight within the last few years. The present investigation focuses on the preparation of nanoparticles (NPs) based on the amphiphilic copolymer pullulan‐graft‐poly(Z‐L‐lysine) bearing different amounts of lysine (10, 20, and 30 wt%), and on the evaluation of their ensuing viability to encapsulate the hydrophobic nonsteroidal anti‐inflammatory drug indomethacin (INDO). The copolymers are synthesized by ring‐opening polymerization, characterized by NMR and FTIR, and their critical aggregation concentration is determined by fluorescence. The NPs are prepared with and without INDO using different copolymer/solvent ratios and INDO/copolymer ratios. The hydrodynamic diameter and polydispersity of the NP suspensions are monitored by dynamic light scattering for 30 days. Their sizes vary between 208 and 338 nm, and some reach the micrometric range (19–73 μm). INDO‐free NPs are identified as spherical‐shaped by atomic force microscopy. Two formulations are tested in terms of encapsulation efficiency (EE = 43%–89%), and the drug crystallinity (DC = 7%–27%) which is determined by differential scanning calorimetry, indicating a reduction with respect to pristine INDO. The results suggest that the copolymers prepared herewith have potential to be applied as carriers for new drug delivery systems of class II drugs.

show abstract

Cellulosic nitrogen doped carbon quantum dots hydrogels with fluorescence/visco-elastic properties for pH- and temperature-sensitivity

Tohamy

2023

Diamond and Related Materials

View full text Add to dashboard Cite

Preparation of hydroxyethyl cellulose/ mangiferin edible films and their antimicrobial properties

Cited by 10 publications

References 23 publications

Oil dispersing and adsorption by carboxymethyl cellulose–oxalate nanofibrils/nanocrystals and their kinetics

Oil dispersing and adsorption by carboxymethyl cellulose–oxalate nanofibrils/nanocrystals and their kinetics

Self‐assembled nanoparticles based on pullulan‐g‐poly(Z‐L‐lysine) for controlled drug delivery: Synthesis, characterization and preliminary studies on the encapsulation of indomethacin

Cellulosic nitrogen doped carbon quantum dots hydrogels with fluorescence/visco-elastic properties for pH- and temperature-sensitivity

Contact Info

Product

Resources

About