Morphology and crystallinity of sisal nanocellulose after sonication

Astuti, Wijayanti Dwi; Triyana, Kuwat; Kamiel, Berli Paripurna

doi:10.1063/1.4999859

Cited by 30 publications

(11 citation statements)

References 12 publications

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“…According to Candra et al 37 lignocellulosic materials without any treatment do not show homogeneity due to the presence of compounds such as lignin, hemicellulose, pectin, among others, which act as binders, preventing defibrillation of cellulose chains. Additionally, roughness in bleached fique fiber is due to nanofibrils which are connected through hydrogen bonds, to form larger units of microfibrils 36,37 . www.nature.com/scientificreports/ FITR analysis.…”

Section: Characterization Of Raw Materials (Nat-f) and Bleached Fibersmentioning

confidence: 99%

“…To increase the yields in obtaining nanocellulose is required to separate cellulose chains from the crystalline part, one of the methods used for this purpose is the ultrasound technique. The transfer of ultrasonic energy to the cellulose chains generated by the cavitation process, is similar to the energy to break a hydrogen bond (100 kJ/mol), therefore, when applying this technique can disintegrate cellulose fibers from the crystalline part, of micrometric size to nanometric size 35,36 .…”

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confidence: 99%

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Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Guancha-Chalapud

Gálvez

Serna-Cock

2020

Sci Rep

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Cellulose nanofibers were obtained from the Colombian fique (Furcraea bedinghausii) and Acrylic hydrogels (H) and reinforced acrylic hydrogels with fique nanofibres (HRFN) were synthesized, using the solution polymerization method. The extraction was carried out using a combined extraction method (chemical procedures and ultrasound radiation). The raw material (NAT-F), bleached fibers (B-F), hydrolyzed fibers and fibers treated with ultrasound (US-F) were characterized by infrared spectroscopy (FTIR) and thermal stability analysis; also, in order to have a comparison criterion, a commercial microcrystalline cellulose sample (CC) was analyzed, which demonstrated the extraction of fique cellulose. The surface morphology of the NAT-F and the B-F was determined by scanning electron microscopy and the average particle size of the nanofibers was made through transmission electron microscopy. In H y HRFN the strain percent and compression resistance (Rc) were measured. The fique nanofibers showed diameter and length averages of 25.2 ± 6.2 nm and 483.8 ± 283.2 nm respectively. Maximum degradation temperature was 317 °C. HRFN presented higher compression resistance (16.39 ± 4.30 kPa) and this resistance was 2.5 greater than the resistance of H (6.49 ± 2.48 kPa). The results indicate that fique lignocellulosic matrix has potential application for obtaining polymeric type composite materials.

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Section: Characterization Of Raw Materials (Nat-f) and Bleached Fibersmentioning

confidence: 99%

mentioning

confidence: 99%

Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Guancha-Chalapud

Gálvez

Serna-Cock

2020

Sci Rep

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“…The contact angle is the resultant between the adhesive strength of the sealer and the substrate and the cohesive strength of the sealer. 9 The sealer that had been stirred was checked to see its flowability until it could be lifted above 1.5 -2.5 cm above the glass plate until it broke, then 0.3 ml was placed on the glass object. After 3 minutes and 10 minutes from the start of mixing the sealer, a photo of the sealer was taken.…”

Section: Methodsmentioning

confidence: 99%

The effect of sisal (Agave Sisalana) nanofiber in epoxy resin sealer on root canal obturation’s push-out bond strength

Amanda

Ratih

Mulyawati

2022

Majalah Kedokteran Gigi Indonesia

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Sisal nanofiber can be used as an additional filler to increase the adhesion strength of the resin epoxy sealer. The aim of this study was to observe the effect of sisal nanofiber addition to epoxy resin sealer on push-out bond strength of root canal obturation material against the root canals. Twenty-five mandibular premolars (n= 25) were prepared until file F3 and obturated using 0%, 0.25%, 0.5%, 0.75%, and 1% sisal nanofiber sealer. After the specimens were stored at incubator, they were horizontally sectioned at apical third. Root sections were tested with push-out technique, and observed under a stereo microscope to determine the failure type. Data were analyzed with one-way ANOVA and LSD pos hoc at 95% confidence level (α=0.05). A one-way ANOVA test revealed that the addition of sisal nanofiber in epoxy resin sealer had a significant effect on the push out bond strength of the obturation material against the root canals. The failure type was observed predominantly in the cohesive type and the lowest in the adhesive type. The addition of sisal nanofiber to the epoxy resin sealer could increase the push-out bond strength of the obturation material against the root canals. Epoxy resin sealers with the addition of sisal nanofiber at a concentration group of 0.75% resulted in the highest push-out strength of root canal obturation materials followed by 0.5% concentration group.

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“…When comparing the HD obtained by DLS with the diameters quantified by SEM, the former provides smaller diameter sizes by undergoing ultrasonic agitation (including KCP that resulted in a diameter range between 5.0 µm -7.5 µm reached by SEM to an HD of 510 nm approximately), since it is a mechanical method that favors the defibrillation of cellulose, breaking and cleaving its bonds, thus decreasing its fibrillar size [39,40].…”

Section: Particle Size Analysismentioning

confidence: 99%

Endo-exoglucanase Synergism for Cellulose Nanofibril Production Assessment and Characterization

Brenes¹,

Chaves²,

Bojorge³

et al. 2022

Preprint

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A study to produce cellulose nanofibrils (CNF) from Kraft cellulose pulp, an optimal enzyme mixture, was defined using a centroid simplex mixture design. The enzyme blend contains 69% endoglucanase and 31% exoglucanase. The central composite rotational design (CCRD) optimized the CNF production process by achieving a higher crystallinity index. It thus corresponded to a solid loading of 15 g/L and an enzyme loading of 0.974. Using the Segal formula, the crystallinity index (CrI) of CNF was determined by X-ray diffraction to be 80.87%. The average diameter of nanocellulose fibers measured by scanning electron microscopy between 550 - 600 nm for the CNF prepared by enzymatic hydrolysis and between 250 - 300 nm for the CNF produced by enzymatic hydrolysis with the optimal enzyme mixture followed by ultrasonic dispersion. Finally, synergistic interactions between the enzymes involved in nanocellulose production were demonstrated, with Colby factor values greater than one.

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Morphology and crystallinity of sisal nanocellulose after sonication

Cited by 30 publications

References 12 publications

Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

Valorization of Colombian fique (Furcraea bedinghausii) for production of cellulose nanofibers and its application in hydrogels

The effect of sisal (Agave Sisalana) nanofiber in epoxy resin sealer on root canal obturation’s push-out bond strength

Endo-exoglucanase Synergism for Cellulose Nanofibril Production Assessment and Characterization

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