Obtaining cellulose nanocrystals from pineapple crown fibers by free-chlorite hydrolysis with sulfuric acid: physical, chemical and structural characterization

Cellulose ◽  
2020 ◽  
Vol 27 (10) ◽  
pp. 5745-5756 ◽  
Author(s):  
Paulo Henrique Fernandes Pereira ◽  
Heitor Luiz Ornaghi Júnior ◽  
Luana Venâncio Coutinho ◽  
Benoit Duchemin ◽  
Maria Odila Hilário Cioffi
Keyword(s):  
Sulfuric Acid ◽  
Structural Characterization ◽  
Cellulose Nanocrystals ◽  
Physical Chemical

scholarly journals Binary Biocompatible CNC–Gelatine Hydrogel as 3D Scaffolds Suitable for Cell Culture Adhesion and Growth

Applied Nano ◽  
2021 ◽  
Vol 2 (2) ◽  
pp. 118-127
Author(s):  
Luca Zoia ◽  
Anna Binda ◽  
Laura Cipolla ◽  
Ilaria Rivolta ◽  
Barbara La Ferla
Keyword(s):  
Tissue Engineering ◽  
Cell Culture ◽  
Cell Cultures ◽  
Cellulose Nanocrystals ◽  
Potential Application ◽  
Chemical Properties ◽  
Cellular Adhesion ◽  
Chemical Crosslinking ◽  
3D Scaffolds ◽  
Physical Chemical

Binary nano-biocomposite 3D scaffolds of cellulose nanocrystals (CNCs)—gelatine were fabricated without using chemical crosslinking additives. Controlled oxidative treatment allowed introducing carboxyl or carbonyl functionalities on the surface of CNCs responsible for the crosslinking of gelatine polymers. The obtained composites were characterized for their physical-chemical properties. Their biocompatibility towards different cell cultures was evaluated through MTT and LDH assays, cellular adhesion and proliferation experiments. Gelatine composites reinforced with carbonyl-modified CNCs showed the most performing swelling/degradation profile and the most promising adhesion and proliferation properties towards cell lines, suggesting their potential application in the field of tissue engineering.

Extraction and comparison of cellulose nanocrystals from lemon (Citrus limon) seeds using sulfuric acid hydrolysis and oxidation methods

2020 ◽  
Vol 238 ◽  
pp. 116180 ◽  
Author(s):  
Huan Zhang ◽  
Yuan Chen ◽  
Shanshan Wang ◽  
Liang Ma ◽  
Yong Yu ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Acid Hydrolysis ◽  
Cellulose Nanocrystals ◽  
Citrus Limon

scholarly journals Biofilms based on pectin from orange peel (Citrus sinensis): Physical, chemical and structural characterization

2020 ◽  
Vol 10 (3) ◽  
pp. 273-278
Author(s):  
Melissa Monserrat Ramos-Alvarado ◽  
María Teresa Cadenas-González ◽  
Gloria Ivette Bolio-López ◽  
Gabriela Leo-Avelino ◽  
Alfredo Maciel-Cerda ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Citrus Sinensis ◽  
Orange Peel ◽  
Physical Chemical

scholarly journals Synthesis of Biomaterial-Based Hydrogels Reinforced with Cellulose Nanocrystals for Biomedical Applications

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Pavan Kumar Dara ◽  
Mahadevan Raghavankutty ◽  
Karthik Deekonda ◽  
Anil Kumar Vemu ◽  
Visnuvinayagam Sivam ◽  
...  
Keyword(s):  
Structural Characterization ◽  
Cellulose Nanocrystals ◽  
Chemical Interaction ◽  
Fibroblast Cell ◽  
X Ray Diffraction ◽  
L929 Fibroblast ◽  
Formic Acid Hydrolysis ◽  
Ft Ir ◽  
Good Biocompatibility ◽  
Ir Analysis

Cellulose nanocrystals (CNC) were prepared by formic acid hydrolysis and TEMPO- (2,2,6,6-tetramethyl-piperidine-1-oxyl-) mediated oxidation. The prepared CNCs were reinforced into biopolymers chitosan (CHI), alginate (ALG), and gelatin (GEL) to obtain “CNC-ALG-GEL” and “CNC-CHI-GEL” hydrogels. The synthesized hydrogels were characterized for physicochemical, thermal, and structural characterization using Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), thermal gravity analysis (TGA), and X-ray diffraction (XRD) analyses. Notably, the reinforcement of CNC has not altered the molecular structure of a biopolymer as revealed by FT-IR analysis. The hydrogels reinforced with CNC have shown better thermal stability and miscibility as revealed by thermal gravity analysis. The physicochemical, thermal, and structural characterization revealed the chemical interaction and electrostatic attraction between the CNC and biopolymers. The biocompatibility was investigated by evaluating the viability of the L929 fibroblast cell, which represents good biocompatibility and nontoxic nature. These hydrogels could be implemented in therapeutic biomedical research and regenerative medicinal applications.

scholarly journals An analysis on the electrophoretic mobility of cellulose nanocrystals as thin cylinders: relaxation and end effect

RSC Advances ◽  
2019 ◽  
Vol 9 (58) ◽  
pp. 34032-34038 ◽  
Author(s):  
Kuan-Hsuan Lin ◽  
Donghao Hu ◽  
Takuya Sugimoto ◽  
Feng-Cheng Chang ◽  
Motoyoshi Kobayashi ◽  
...  
Keyword(s):  
Sulfuric Acid ◽  
Surface Morphology ◽  
Acid Hydrolysis ◽  
Electrophoretic Mobility ◽  
Cellulose Nanocrystals ◽  
Ordered Structure ◽  
End Effect ◽  
Cellulosic Fibers

Cellulose nanocrystals (CNCs) are extracted from cellulosic fibers via sulfuric acid hydrolysis and found to exhibit unique properties due to their nanoscale, ordered structure, and surface morphology.

Characterization of the redispersibility of cellulose nanocrystals by particle size analysis using dynamic light scattering

TAPPI Journal ◽  
2019 ◽  
Vol 18 (4) ◽  
pp. 223-231
Author(s):  
GUOMIN WU ◽  
QIAN LI ◽  
CAN JIN ◽  
ZHENWU KONG ◽  
SIQUN WANG
Keyword(s):  
Particle Size ◽  
Sulfuric Acid ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Acid Hydrolysis ◽  
Convenient Method ◽  
Cellulose Nanocrystals ◽  
High Speed ◽  
Particle Size Analysis ◽  
Size Analysis

Cellulose nanocrystals (CNCs), which are derived from the most abundant and inexhaustible natural polymer, cellulose, have received significant interest owing to their mechanical, optical, chemical, and rheological properties. In order to transport CNC products conveniently and efficiently, they are ideally dried and stored as powders using freeze-drying or spray-drying technologies. The redispersibility of CNC powders is quite important for their end use; hence, a convenient method is required to characterize the redispersibility of CNC powders. In this paper, the possibility of characterizing the redispersibility of CNC powders by particle size analysis using dynamic light scattering (DLS) was investigated by comparing the results from transmission electron microscopy (TEM) and DLS. The particle size obtained with DLS approximately matched that obtained with TEM. Compared with TEM, DLS is a quick and convenient method to measure the particle size distribution of CNCs in water. Two kinds of dispersing methods, sonication and high-speed shearing, and two kinds of CNCs prepared by different methods, sulfuric acid hydrolysis and the TEMPO (2,2,6,6-tetramethylpiperidine-1-oxyl) oxidization method, were used to study the redispersibility of CNCs. Sonication was more efficient than the high-speed shearing method for nanoscale dispersion of CNC powders in water. CNCs prepared by sulfuric acid hydrolysis could be more easily redispersed in water than those prepared by TEMPO oxidation.

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