Changes in the Molecular Orientation and Tensile Properties of Uniaxially Drawn Cellulose Films

2006 ◽  
Vol 7 (11) ◽  
pp. 3146-3150 ◽  
Author(s):  
Wolfgang Gindl ◽  
Klaus J. Martinschitz ◽  
Peter Boesecke ◽  
Jozef Keckes
Keyword(s):  
Tensile Properties ◽  
Molecular Orientation ◽  
Cellulose Films

Reduced Graphene Oxide/Carboxymethyl Cellulose Nanocomposites: Novel Conductive Films

2019 ◽  
Vol 19 (6) ◽  
pp. 3544-3550 ◽  
Author(s):  
Jutamas Ampaiwong ◽  
Pranee Rattanawaleedirojn ◽  
Kanokwan Saengkiettiyut ◽  
Nadnudda Rodthongkum ◽  
Pranut Potiyaraj ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Graphene Oxide ◽  
Water Absorption ◽  
Tensile Properties ◽  
Reduced Graphene Oxide ◽  
Carboxymethyl Cellulose ◽  
Water Solubility ◽  
Cellulose Film ◽  
Cellulose Films ◽  
Reduced Graphene

Herein, carboxymethyl cellulose nanocomposite films incorporated with graphene oxide and reduced graphene oxide were successfully prepared by a novel approach for the first time, and their alternative properties compared with the original carboxymethyl cellulose films were disclosed. For carboxymethyl cellulose/reduced graphene oxide film preparation, sodium borohydride was used as a chemical reducing agent. The carboxymethyl cellulose films were prepared by using a solvent casting method, followed by an acid treatment to decrease the water solubility (98%) while enhancing the tensile strength (15%) and elastic modulus (32%) of the original carboxymethyl cellulose films. Overall, the addition of 1.0 wt% graphene oxide and reduced graphene oxide to the treated films increased the water solubility, water absorption, tensile properties and electrical conductivity. Particularly, the electrical conductivity was predominantly enhanced 1.3×105 times with graphene oxide and 2.2×105 times with reduced graphene oxide compared to the treated carboxymethyl cellulose film. The electrical conductivity of the treated carboxymethyl cellulose film also increased with an increase in reduced graphene oxide. The effects of reduced graphene oxide on the water solubility, water absorption, tensile properties and electrical conductivity of the treated carboxymethyl cellulose film were more pronounced than those of graphene oxide, especially for the electrical conductivity. In conclusion, graphene oxide and reduced graphene oxide might be alternative nanofillers for improving the carboxymethyl cellulose film properties. For the future applications, carboxymethyl cellulose/reduced graphene oxide films prepared by using this approach might be employed as alternative materials in electronic packagings and electrochemical biosensors.

Characteristics of Microwave-Esterified Cellulose Film from Corn Husk and Cotton: Effects of Degree of Substitution

2010 ◽  
Vol 93-94 ◽  
pp. 259-262
Author(s):  
Jittiporn Saeng-On ◽  
Duangdao Aht-Ong
Keyword(s):  
Water Absorption ◽  
Tensile Properties ◽  
1H Nmr ◽  
Cotton Fabrics ◽  
Esterification Reaction ◽  
Cellulose Film ◽  
Cellulose Films ◽  
Corn Husk ◽  
Waste Cotton Fabrics ◽  
Modified Cellulose

The modified cellulose film was synthesized from corn husk and waste cotton fabrics in LiCl/DMAc solvent system by esterification reaction under microwave energy using lauroyl chloride and DMAP as an esterifying agent and a catalyst, respectively. By varying microwave power and reaction time used in the esterification reaction, modified cellulose powder with various degree of substitution (DS) was obtained. The structure of modified cellulose was proved by FT-IR and 1H-NMR analysis. The DS value of modified cellulose was measured by 1H-NMR. The modified cellulose films with different DS values were prepared by casting method. The influences of DS values on the properties of the prepared modified cellulose films were tested for their wettability, water absorption, gloss, and tensile properties. The results showed significant effect of the cellulose source and the DS values on the properties of modified cellulose film. The modified cellulose from corn husk resulted in the film with greater tensile strength and elongation at break than the film from waste cotton fabrics. The esteried-cellulose from both sources with high DS values yielded the film with higher tensile properties and lower water absorption.

Liquid crystalline copolyester/polyethylenein situ composite film: Rheology, morphology, molecular orientation, and tensile properties

2002 ◽  
Vol 84 (3) ◽  
pp. 561-567 ◽  
Author(s):  
Teeranant Nakinpong ◽  
Sauvarop Bualek-Limcharoen ◽  
Angkana Bhutton ◽  
Ornsiri Aungsupravate ◽  
Taweechai Amornsakchai
Keyword(s):  
Composite Film ◽  
Tensile Properties ◽  
Molecular Orientation ◽  
Liquid Crystalline ◽  
Liquid Crystalline Copolyester

Effect of deformation on the molecular orientation and strength anisotropy of cellulose, films, membranes, and casings

1992 ◽  
Vol 23 (5) ◽  
pp. 387-389
Author(s):  
V. M. Irklei ◽  
O. S. Vavrinyuk ◽  
K. Ya. Reznik ◽  
Yu. A. FroIkov ◽  
S. V. Strizhevskii
Keyword(s):  
Molecular Orientation ◽  
Strength Anisotropy ◽  
Cellulose Films
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