Linking Film Structure and Mechanical Properties in Nanocomposite Films Formed from Dispersions of Cellulose Nanocrystals and Acrylic Latexes

Langmuir ◽  
2020 ◽  
Vol 36 (8) ◽  
pp. 2052-2062 ◽  
Author(s):  
Elodie Limousin ◽  
Iliane Rafaniello ◽  
Thomas Schäfer ◽  
Nicholas Ballard ◽  
José M. Asua
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Film Structure ◽  
Nanocomposite Films ◽  
Acrylic Latexes

scholarly journals SUSTAINABLE CELLULOSE NANOCRYSTAL REINFORCED CHITOSAN/HPMC BIO-NANOCOMPOSITE FILMS CONTAINING MENTHOL OIL AS PACKAGING MATERIALS

2021 ◽  
Vol 55 (5-6) ◽  
pp. 649-658
Author(s):  
SALAH A. A. MOHAMED ◽  
AHMED SALAMA ◽  
MOHAMED EL-SAKHAWY ◽  
ABDELMAGEED M. OTHMAN
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Food Packaging ◽  
Hydroxypropyl Methylcellulose ◽  
Composite Films ◽  
Antibacterial Properties ◽  
Film Structure ◽  
Cellulose Nanocrystal ◽  
Nanocomposite Films ◽  
Low Oxygen

There is a growing demand to develop biodegradable composite films, with enhanced water resistance, antimicrobial activity, high mechanical properties and low oxygen permeability. In the present study, chitosan/hydroxypropyl methylcellulose (HPMC) films reinforced with cellulose nanocrystal (CNC) and containing menthol oil were prepared for food packaging applications. Menthol oil was selected due to its antibacterial properties, as well as relatively low cost and wide availability. CNC was prepared from bagasse via acid degradation. The bio-composites were prepared through a simple and versatile solution mixing and casting method. The morphology, chemical composition, water absorption, mechanical properties and antibacterial activity of the films were investigated. FTIR spectra were used to evaluate the film structure in terms of the interactions between components. Data showed that the addition of CNC improved the mechanical properties of the formed films and the menthol oil enhanced their antibacterial properties. HPMC and HPMC/CNC reduced the water absorption of the pure chitosan membrane from 70% to 22% and 9-11% by weight, respectively, which makes these constituents a good alternative for producing packaging.

Improved mechanical properties of k-carrageenan-based nanocomposite films reinforced with cellulose nanocrystals

2019 ◽  
Vol 123 ◽  
pp. 1248-1256 ◽  
Author(s):  
Zineb Kassab ◽  
Faissal Aziz ◽  
Hassan Hannache ◽  
Hicham Ben Youcef ◽  
Mounir El Achaby
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Nanocomposite Films

scholarly journals Drying Effect on Mechanical Properties of Bio-nanocomposite Films Fabricated from Self-assembled Cellulose Nanocrystals into Potato Starch

2020 ◽  
pp. 129-138
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Young’S Modulus ◽  
Cellulose Nanocrystals ◽  
Young's Modulus ◽  
Potato Starch ◽  
Aqueous Suspension ◽  
Nanocomposite Films ◽  
Elongation At Break ◽  
Natural Drying

Composites films with higher mechanical properties from naturally occurring degradable materials are of present demand to achieve goals of sustainable development. Interaction within composite constituents during drying controls mechanical properties. Here, bio-nanocomposites films were first prepared from cellulose nanocrystals synthesized from jute fibres and extracted potato starch with the same chemical formulations. The filler, nanocrystals consist of nanorod-like cellulose particles obtained as an aqueous suspension by sulfuric acid (H2SO4) hydrolysis of jute fibres and the matrix was prepared by plasticization of potato starch after disruption of starch granules with water and glycerin. Nanocomposite films were obtained by casting the homogeneous aqueous suspension at 95oC and followed by natural drying (atmospheric drying, 25oC) and oven drying at 40oC. The thickness of the bio-nanocomposites film about 250 μm was controlled by using a 2 mm thick structural glass frame. It is revealed that with increasing the percentage of cellulose nanocrystals in composite films, mechanical properties corresponding to tensile strength and Young’s modulus were increased significantly. The film containing the highest quantity of cellulose nanocrystals (20% w/w of starch) revealed better properties in case of natural drying (tensile strength 84.2 MPa, Young’s modulus 0.563 GPa, elongation at break 27%) than the film properties (tensile strength 35.2 MPa, Young’s modulus 0.423 GPa, elongation at break 20%) of oven drying.

scholarly journals Mechanical properties and degradation studies of poly(mannitol sebacate)/cellulose nanocrystals nanocomposites

RSC Advances ◽  
2015 ◽  
Vol 5 (69) ◽  
pp. 55879-55891 ◽  
Author(s):  
Águeda Sonseca ◽  
Oscar Sahuquillo ◽  
E. Johan Foster ◽  
Enrique Giménez
Keyword(s):  
Mechanical Properties ◽  
Cellulose Nanocrystals ◽  
Sebacic Acid ◽  
Temperature Profiles ◽  
Degradation Studies

Two pre-polymers with ad-mannitol : sebacic acid 1 : 1 and 1 : 2 ratios respectively were combined with cellulose nanocrystals (CNCs) and crosslinked applying different time–temperature profiles to obtain PMS/CNC nanocomposites with different properties.

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