Effect of Hydrochloric Acid Hydrolysis under Sonication and Hydrothermal Process to Produce Cellulose Nanocrystals from Oil Palm Empty Fruit Bunch (OPEFB) DOI Open Access
Zulnazri Zulnazri, Rozanna Dewi,

Agam Muarif

и другие.

Polymers, Год журнала: 2024, Номер 16(13), С. 1866 - 1866

Опубликована: Июнь 29, 2024

This paper presents an approach for hydrolyzing cellulose nanocrystals from oil palm empty fruit bunch (OPEFB) presented through hydrochloric acid hydrolysis under sonication–hydrothermal conditions. Differences in concentration, reaction time, and acid-to-cellulose ratio affect toward the yield, crystallinity, microstructure, thermal stability were obtained. The highest yield of up to 74.82%, crystallinity 78.59%, a maximum degradation temperature (Tmax) 339.82 °C achieved using 3 M HCl at 110 during 1 h. X-ray diffraction analysis indicated higher peak pattern 2θ = 22.6° low 18°. All showed crystalline size nm, it was that process could reduce cellulose. Infrared spectroscopy deletion lignin hemicellulose demonstrated spectrum. Cellulose nanocrystal morphology more compact structure well-ordered surface arrangement than also had good stability, as high indicated, where CNC-D1 began degrading temperatures (T0) 307.09 decomposed 340.56 °C.

Язык: Английский

Recrystallization of Cellulose, Chitin and Starch in Their Individual and Native Forms DOI Open Access
Ekaterina Podgorbunskikh, Timofei Kuskov,

Vladimir Bukhtoyarov

и другие.

Polymers, Год журнала: 2024, Номер 16(7), С. 980 - 980

Опубликована: Апрель 3, 2024

Semi-crystalline natural polymers are involved in many technological processes. Biopolymers having identical chemical compositions can differ reactivity heterogeneous transformations depending on their crystal structure (polymorphic modification). This paper compares the recrystallization processes occurring polysaccharides (cellulose, chitin, and starch) individual form as a component of native biomass. Aqueous treatment pre-amorphized semi-crystalline biopolymers was shown to result swelling, thus alleviating kinetic restrictions imposed restoration crystalline regions phase transition thermodynamically more stable polymorphic modification. During recrystallization, cellulose I within plant-based biomass undergoes II. A similar situation demonstrated for α- β-chitin, which recrystallize only into α-polymorphic modification case both materials. Recrystallization A-, B-, C-type starch, flour, during aqueous treatment, results transition, predominantly B-type starch. The process depends temperature treatment; longer duration has almost no effect degree polymers,

Язык: Английский

Процитировано

4

How does particle size of spent coffee ground affect the physicochemical properties of isolated cellulose nanosphere? DOI Creative Commons

Mahdieh Ostadi Moghadam,

Marzieh Moeenfard

Results in Chemistry, Год журнала: 2024, Номер 10, С. 101683 - 101683

Опубликована: Июль 27, 2024

Studying the effect of raw material particle size on properties isolated nanocellulose is crucial for enhancing performance, optimizing processing techniques, and promoting sustainability in various industrial applications. Therefore, this study aims to extract characterize from spent coffee ground (SCG) with different particles (A: 850–1000, B: 500–850, C: 350–500 μm). For purpose, SCGs were purified using alkaline bleaching agents cellulose, followed by acid hydrolysis (sulfuric 64 %, 45 °C, 1 h) combined ultrasonication treatment produce nanocellulose. The obtained nanocelluloses characterized terms morphology, distribution, sulfur content, ζ-potential, crystallinity, crystal size, thermal stability, re-dispersibility water. Atomic force microscopy confirmed production spherical (CNS) diameter ranging 65.21 nm A-CNS 49.31 48.06 B C-CNS, respectively. ζ-potential fresh dispersions decreased −44 mV −41 −40 content also gradually 214.30 (A-CNS) 191.29 mmol/kg (C-CNS). All CNS relatively thermally stable, analysis showing enhanced stability A-CNS. crystallinity index (64–69 %) (2.21–2.39 nm) not affected sizes. In summary, dimensions, dispersions, varied significantly among samples, depending SCG. it strongly recommended that researchers choose optimum producing desired

Язык: Английский

Процитировано

4

Sources and Extraction of Biopolymers and Manufacturing of Bio-Based Nanocomposites for Different Applications DOI Creative Commons

Elham Azadi,

Mohammad Dinari, Maryam Derakhshani

и другие.

Molecules, Год журнала: 2024, Номер 29(18), С. 4406 - 4406

Опубликована: Сен. 16, 2024

In the recent era, bio-nanocomposites represent an emerging group of nanostructured hybrid materials and have been included in a new field at frontier science, life sciences, nanotechnology. These biohybrid reveal developed structural functional features great attention for diverse uses. take advantage synergistic assembling biopolymers with nanometer-sized reinforcements. Conversely, polysaccharides received due to their several biological properties like antimicrobial antioxidant performance. They mainly originated different parts plants, animals, seaweed, microorganisms (bacteria, fungi, yeasts). Polysaccharide-based nanocomposites features, physical, structural, features; affordability; biodegradability; biocompatibility. bio-based applied biomedical, water treatment, food industries, etc. This paper will focus on very trends bio-nanocomposite based applications. Sources extraction methods preparation be discussed.

Язык: Английский

Процитировано

4

Navigating the Nano-world Future: Harnessing Cellulose Nanocrystals from Green Sources for Sustainable Innovation DOI Creative Commons
A. Felix Sahayaraj, Bharathi Manoharan,

Vivek Mariappan Santhi

и другие.

Heliyon, Год журнала: 2024, Номер 11(1), С. e41188 - e41188

Опубликована: Дек. 17, 2024

Язык: Английский

Процитировано

4

Effect of Hydrochloric Acid Hydrolysis under Sonication and Hydrothermal Process to Produce Cellulose Nanocrystals from Oil Palm Empty Fruit Bunch (OPEFB) DOI Open Access
Zulnazri Zulnazri, Rozanna Dewi,

Agam Muarif

и другие.

Polymers, Год журнала: 2024, Номер 16(13), С. 1866 - 1866

Опубликована: Июнь 29, 2024

This paper presents an approach for hydrolyzing cellulose nanocrystals from oil palm empty fruit bunch (OPEFB) presented through hydrochloric acid hydrolysis under sonication–hydrothermal conditions. Differences in concentration, reaction time, and acid-to-cellulose ratio affect toward the yield, crystallinity, microstructure, thermal stability were obtained. The highest yield of up to 74.82%, crystallinity 78.59%, a maximum degradation temperature (Tmax) 339.82 °C achieved using 3 M HCl at 110 during 1 h. X-ray diffraction analysis indicated higher peak pattern 2θ = 22.6° low 18°. All showed crystalline size nm, it was that process could reduce cellulose. Infrared spectroscopy deletion lignin hemicellulose demonstrated spectrum. Cellulose nanocrystal morphology more compact structure well-ordered surface arrangement than also had good stability, as high indicated, where CNC-D1 began degrading temperatures (T0) 307.09 decomposed 340.56 °C.

Язык: Английский

Процитировано

3