scholarly journals Extraction of Cellulose Nanocrystals (NCC) from Cotton Waste and Morphology of NCC Obtained with Different Alkali Neutralization

2019 ◽  
pp. 1-8 ◽  
Author(s):  
Fabrizio Scognamiglio ◽  
Carlo Santulli ◽  
Graziella Roselli
Keyword(s):  
Sulfuric Acid ◽  
Cellulose Nanocrystals ◽  
Polarized Light ◽  
Cotton Textile ◽  
Cotton Linter ◽  
Microscopy Observation ◽  
Textile Waste ◽  
Cotton Waste ◽  
Long Fibers ◽  
Alkali Neutralization

The extraction of cellulose nanocrystals (NCC) from cotton textile waste, constituted by 70% long fibers and 30% cotton linter, was performed through the action of sulfuric acid followed by solution neutralization with two different alkalis, namely ammonia and sodium bicarbonate, which yielded microcellulose (MCC), then centrifuged to NCC. The action of the two alkalis was compared as for fiber repeatability and morphology, and the results obtained using ammonia were considered more suitable for possible introduction of NCC for the repair of historical paper artifacts. This evidence was obtained by applying optical/polarized light microscopy observation and dynamic light scattering (DLS) results.

scholarly journals Cellulose Nanocrystals Derived from Textile Waste through Acid Hydrolysis and Oxidation as Reinforcing Agent of Soy Protein Film

Polymers ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 958 ◽  
Author(s):  
Shuting Huang ◽  
Ran Tao ◽  
Ashraf Ismail ◽  
Yixiang Wang
Keyword(s):  
Acid Hydrolysis ◽  
Cellulose Nanocrystals ◽  
Soybean Protein ◽  
Value Added ◽  
Soybean Protein Isolate ◽  
Protein Film ◽  
Textile Waste ◽  
Aspect Ratios ◽  
Cellulose Iβ ◽  
Reinforcing Agent

More than 10 million tons of textile waste are disposed through landfill every year in North America. The disposal of textile waste via landfill or incineration causes environmental problems and represents a waste of useful resources. In this work, we explored the possibility to directly extract cellulose nanocrystals (CNCs) from untreated textile waste through two methods, namely sulfuric acid hydrolysis and three-step oxidization. CNCs with cellulose Iβ crystalline structure and rod-like shape were successfully obtained. The aspect ratios of CNCs prepared from acid hydrolysis and oxidization were 10.00 ± 3.39 and 17.10 ± 12.85, respectively. Their application as reinforcing agent of soybean protein isolate (SPI) film was evaluated. With the addition of 20% CNCs, the composite film maintained the high transparency, while their water vapor barrier property, tensile strength, and Young’s modulus were significantly improved. This research demonstrates a promising approach to recycle textile waste, and more value-added applications based on the derived CNCs could be expected.

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

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 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.

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