Isolation and surface modification of cellulose from underutilized<i>Luffa cylindrica</i>sponge: A potential feed stock for local polymer industry in Africa

Adewuyi, Adewale; Pereira, Fabiano Vargas

doi:10.1016/j.jaubas.2016.12.003

Cited by 11 publications

(6 citation statements)

References 25 publications

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“…The WAC of cellulose generally depends on various factors, including the degree of crystallinity, the presence of other substances (e.g., hemicellulose and lignin) in the cellulose matrix, and the accessibility of the hydroxyl groups [ 52 ]. Highly crystalline cellulose structures tend to have lower water absorption due to the limited availability of hydroxyl groups for hydrogen bonding [ 53 ]. Martinelli et al [ 52 ] claim that mature coconut fiber has more amorphous regions in its cellulose structure than young coconut fiber, which is also confirmed in this study ( Figure 3 ).…”

Section: Resultsmentioning

confidence: 99%

Effect of Bleaching Processes on Physicochemical and Functional Properties of Cellulose and Carboxymethyl Cellulose from Young and Mature Coconut Coir

Klunklin,

Hinmo,

Thipchai

et al. 2023

Polymers

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The objective of this study was to characterize the properties of cellulose and CMC synthesized from young and mature coconut coir with different bleaching times (bleaching for the first time; 1 BT, bleaching for a second time; 2 BT, and bleaching for the third time; 3 BT) using hydrogen peroxide (H2O2). The surface morphology, structural information, chemical compositions, and crystallinity of both cellulose and CMC were determined. H2O2 bleaching can support delignification by reducing hemicellulose and lignin, as evidenced by FTIR showing a sharp peak at wave number 1260 cm−1. The cellulose and CMC from coconut coir can be more dispersed and have greater functional characteristics with increasing bleaching times due to the change in accessibility of hydroxyl groups in the structure. The CMC diffraction patterns of coconut coir after the bleaching process showed the destruction of the crystalline region of the original cellulose. The SEM images showed that the surface of CMC was smoother than that of cellulose. The CMCy had a higher water holding capacity (WHC) compared to the CMCm as the bleaching can increase interaction between the polymer and water molecules. Therefore, the best quality of CMC corresponds to CMCy. Based on these findings, bleaching time has a strong effect on the functional properties of cellulose and CMC from coconut coir.

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Section: Resultsmentioning

confidence: 99%

Effect of Bleaching Processes on Physicochemical and Functional Properties of Cellulose and Carboxymethyl Cellulose from Young and Mature Coconut Coir

Klunklin,

Hinmo,

Thipchai

et al. 2023

Polymers

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“…The maximum MB and Pb 2+ ions sorption capacities (q max ) of the selected sorbents which calculated from the Langmuir model were compared with different sorbents in previous studies as presented in Table ( 4). The data indicated that the prepared sorbents have a good ability to remove MB and Pb 2+ ions from the solution.…”

Section: Effect Of the Initial Mb And Pb 2+ Ions Concentrationsmentioning

confidence: 96%

Preparation and characterization of multifunctional sponge-gourd fibers (Luffa cylindrica)/ hydroxyapatite composites for removal of lead and methylene blue

Oun

Kamal

Farroh

et al. 2021

Preprint

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Cellulose, oxidized-fibers, and oxidized-nanocellulose were isolated from sponge-gourd fibers (Luffa cylindrica). Isolated materials showed different morphology (shape and size), chemical, crystalline properties, and removal efficiency against methylene blue (MB) and lead ions (Pb2+). The cellulosic materials showed high efficiency in removing MB more than Pb2+. So, different luffa forms/hydroxyapatite (HAp) composites were prepared and used as adsorbents for removal of both MB and Pb2+ from aqueous solutions. The effect of sorbent type, contact time, and initial MB and Pb2+ concentrations were studied. HAp was successfully synthesized on the surface of luffa with an average length of 40–56 nm and width of 14–19 nm. Kinetic and adsorption studies of MB and Pb2+ ions were well fitted with the pseudo-second-order model and Langmuir model. The maximum adsorption capacity of MB was 25.2 mg/g, 30.8 mg/g, and 36.2 mg/g for oxidized-fibers/HAp, oxidized-fibers, and cellulose, respectively, and for Pb2+ was 625 mg/g, 714 mg/g, and 714.5 mg/g for oxidized-fibers/HAp, oxidized-nanocellulose/HAp, and cellulose/HAp, respectively. Also, more than 85% of MB (25 mg/L) and 95% of lead (500 mg/L) were removed within the first 5 min. Oxidize-fibers/HAp composite showed effective adsorption with both MB and Pb2+ in a very short time.

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“…Nanocellulose (CN) yields a snowy-white powder. 22,23 2.2.2. Synthesis of ferric-modied nanocellulose composites.…”

Section: Synthesis Of Solid Nano-adsorbentsmentioning

confidence: 99%

Utilizing modified cellulose nanoparticles derived from a plant loofah sponge to improve the removal of diazinon insecticide from an aqueous medium

2023

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Isolation and surface modification of cellulose from underutilizedLuffa cylindricasponge: A potential feed stock for local polymer industry in Africa

Cited by 11 publications

References 25 publications

Effect of Bleaching Processes on Physicochemical and Functional Properties of Cellulose and Carboxymethyl Cellulose from Young and Mature Coconut Coir

Effect of Bleaching Processes on Physicochemical and Functional Properties of Cellulose and Carboxymethyl Cellulose from Young and Mature Coconut Coir

Preparation and characterization of multifunctional sponge-gourd fibers (Luffa cylindrica)/ hydroxyapatite composites for removal of lead and methylene blue

Utilizing modified cellulose nanoparticles derived from a plant loofah sponge to improve the removal of diazinon insecticide from an aqueous medium

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