Mechanical Properties of Bacterial Cellulose Microfibril Bundles in Tensile Loading

2013 ◽  
Author(s):  
Mohammad Shafayet Zamil ◽  
Yuanyuan Weng ◽  
Hojae Yi ◽  
Jeffrey Catchmark ◽  
Virendra M. Puri
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose ◽  
Cellulose Microfibril ◽  
Tensile Loading

Effect of Castor Oil Impregnation on the Physical and Mechanical Properties of Bacterial Cellulose

2012 ◽  
Vol 3 (1) ◽  
pp. 13-26
Author(s):  
Myrtha Karina ◽  
Lucia Indrarti ◽  
Rike Yudianti ◽  
Indriyati
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Bacterial Cellulose ◽  
Young’S Modulus ◽  
Castor Oil ◽  
Young's Modulus ◽  
Physical And Mechanical Properties ◽  
Scanning Electron Micrographs ◽  
Elongation At Break ◽  
Acetone Water

The effect of castor oil on the physical and mechanical properties of bacterial cellulose is described. Bacterial cellulose (BC) was impregnated with 0.5–2% (w/v) castor oil (CO) in acetone–water, providing BCCO films. Scanning electron micrographs revealed that the castor oil penetrated the pores of the bacterial cellulose, resulting in a smoother morphology and enhanced hydrophilicity. Castor oil caused a slight change in crystallinity indices and resulted in reduced tensile strength and Young's modulus but increased elongation at break. A significant reduction in tensile strength and Young's modulus was achieved in BCCO films with 2% castor oil, and there was an improvement in elongation at break and hydrophilicity. Impregnation with castor oil, a biodegradable and safe plasticiser, resulted in less rigid and more ductile composites.

Environmental Effects on the Static and Fatigue Behaviours of Hemp Fibre under Tensile Loading

2015 ◽  
Vol 798 ◽  
pp. 410-418
Author(s):  
Anh Dung Ngo ◽  
Thu Nga Ho ◽  
Khalid Sefrioui Manar
Keyword(s):  
Mechanical Properties ◽  
Moisture Content ◽  
Failure Modes ◽  
Harmful Effect ◽  
Tensile Loading ◽  
Ambient Air ◽  
Absorption Mechanism ◽  
Hemp Fibre ◽  
Temperature And Humidity ◽  
Static Tensile

Environmental and loading mode effects on the tensile properties of Hemp fibre were investigated. At first, absorption of moisture into the fibre from ambient air and absorption of water into the fibre in immersion were studied. Then static and cyclic loadings tensile tests were conducted in various temperature and humidity conditions. It was found that, in ambient air (0% < RH < 80%) the moisture content of the studied fibre decreased with the increase of temperature conformed to the GAB model suggesting a multilayer absorption mechanism. On the contrary, for the fibre immersed in water, the moisture content increased with the increase of temperature. The activation of temperature on the diffusion of the water into the fibre by micro-pores and lumens jointly with the lack of possibility for the imprisoned water to evaporate might be the cause of this effect. Experimental results suggested that temperature and humidity could individually reduce the mechanical properties of Hemp fibre. Their interaction caused even a more harmful effect. Semi empirical and neural networks were used to predict the hygro-thermal effects on the mechanical properties under static tensile loading. Broken surfaces of the specimens were also examined showing different failure modes for static and cyclic tensile loadings. Finally, the value of the cellulose micro-fibrils angle (MFA) estimated using the static tensile stress-strain curve was 8.4o±1.9o.

Influence of Bacterial Cellulose Gel Film Modification on Its Mechanical Properties and Ability to Covalently Bind Enzymes

2021 ◽  
Vol 63 (3) ◽  
pp. 232-238
Author(s):  
D. A. Kadimaliev ◽  
A. A. Devyataeva ◽  
I. P. Grunyushkin ◽  
A. N. Malafeev ◽  
V. V. Revin
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose ◽  
Gel Film ◽  
Cellulose Gel

scholarly journals Mechanical properties of bacterial cellulose synthesised by diverse strains of the genus Komagataeibacter

2018 ◽  
Vol 81 ◽  
pp. 87-95 ◽  
Author(s):  
Si-Qian Chen ◽  
Patricia Lopez-Sanchez ◽  
Dongjie Wang ◽  
Deirdre Mikkelsen ◽  
Michael J. Gidley
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose

scholarly journals Surface Modification of Bacterial Cellulose for Biomedical Applications

2022 ◽  
Vol 23 (2) ◽  
pp. 610
Author(s):  
Teresa Aditya ◽  
Jean Paul Allain ◽  
Camilo Jaramillo ◽  
Andrea Mesa Restrepo
Keyword(s):  
Mechanical Properties ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Surface Modification ◽  
Bacterial Cellulose ◽  
Biomedical Applications ◽  
Human Tissues ◽  
Naturally Occurring ◽  
Microstructure And Mechanical Properties

Bacterial cellulose is a naturally occurring polysaccharide with numerous biomedical applications that range from drug delivery platforms to tissue engineering strategies. BC possesses remarkable biocompatibility, microstructure, and mechanical properties that resemble native human tissues, making it suitable for the replacement of damaged or injured tissues. In this review, we will discuss the structure and mechanical properties of the BC and summarize the techniques used to characterize these properties. We will also discuss the functionalization of BC to yield nanocomposites and the surface modification of BC by plasma and irradiation-based methods to fabricate materials with improved functionalities such as bactericidal capabilities.

Bionanocomposites of thermoplastic starch reinforced with bacterial cellulose nanofibres: Effect of enzymatic treatment on mechanical properties

2010 ◽  
Vol 80 (3) ◽  
pp. 866-873 ◽  
Author(s):  
Marco Aurélio Woehl ◽  
Carla Daniele Canestraro ◽  
Alexandre Mikowski ◽  
Maria Rita Sierakowski ◽  
Luiz Pereira Ramos ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Bacterial Cellulose ◽  
Thermoplastic Starch ◽  
Enzymatic Treatment ◽  
Cellulose Nanofibres
Sign in / Sign up

Export Citation Format

Share Document