Influence of graphene oxide incorporation and chemical cross-linking on structure and mechanical properties of layer-by-layer assembled poly(Vinyl alcohol)-Laponite free-standing films

2016 ◽  
Vol 54 (22) ◽  
pp. 2377-2387 ◽  
Author(s):  
T. Umasankar Patro ◽  
H. Daniel Wagner
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Layer By Layer ◽  
Free Standing ◽  
Chemical Cross Linking

scholarly journals Regulation Mechanism of Graphene Oxide on the Structure and Mechanical Properties of Bio-Based Gel-Spun Lignin/Poly (Vinyl Alcohol) Fibers

2021 ◽  
Author(s):  
Yanhong Jin ◽  
Yuanyuan Jing ◽  
Wenxin Hu ◽  
Jiaxian Lin ◽  
Yu Cheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Graphene Oxide ◽  
Young’S Modulus ◽  
Vinyl Alcohol ◽  
Young's Modulus ◽  
Lignin Content ◽  
Poly Vinyl Alcohol ◽  
Regulation Mechanism ◽  
Composite Fibers

Abstract Lignin has been used as a sustainable and eco-friendly filler in composite fibers. However, lignin aggregation occurred at high lignin content, which significantly hindered the further enhancement of fiber performance. The incorporation of graphene oxide (GO) enhanced the mechanical properties of the lignin/poly(vinyl alcohol) (PVA) fibers and affected their structure. With the GO content increasing from 0 to 0.2%, the tensile strength of 5% lignin/PVA fibers increased from 491 MPa to 631 MPa, and Young's modulus increased from 5.91 GPa to 6.61 GPa. GO reinforced 30% lignin/PVA fibers also showed the same trend. The tensile strength increased from 455 MPa to 553 MPa, and Young's modulus increased from 5.39 GPa to 7 GPa. The best mechanical performance was observed in PVA fibers containing 5% lignin and 0.2% GO, which had an average tensile strength of 631 MPa and a Young’s modulus of 6.61 GPa. The toughness values of these fibers are between 9.9-15.6 J/g, and the fibrillar and ductile fracture microstructure were observed. Structure analysis of fibers showed that GO reinforced 5% lignin/PVA fibers had higher crystallinity, and evidence of hydrogen bonding among GO, lignin, and PVA in the gel fibers was revealed. Further, water resistance and swelling behavior of composite PVA fibers were studied to further evidence the structure change of composite fibers.

Physico-mechanical properties of graphene oxide/poly(vinyl alcohol) composites

2019 ◽  
Vol 297 (3) ◽  
pp. 485-491 ◽  
Author(s):  
Tatiana V. Panova ◽  
Anna A. Efimova ◽  
Aleksandr V. Efimov ◽  
Anna K. Berkovich
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol

Effect of chemical cross-linking under elongation on shape restoring of poly(vinyl alcohol) hydrogel

1992 ◽  
Vol 46 (8) ◽  
pp. 1449-1451 ◽  
Author(s):  
Toshihiro Hirai ◽  
Hidetoshi Maruyama ◽  
Takashi Suzuki ◽  
Sadao Hayashi
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Chemical Cross Linking

scholarly journals Anisotropic tough poly(vinyl alcohol)/graphene oxide nanocomposite hydrogels for potential biomedical applications

RSC Advances ◽  
2018 ◽  
Vol 8 (24) ◽  
pp. 13284-13291 ◽  
Author(s):  
Qiaomei Luo ◽  
Yangyang Shan ◽  
Xia Zuo ◽  
Jiaqi Liu
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Biomedical Applications ◽  
Poly Vinyl Alcohol ◽  
Nanocomposite Hydrogel ◽  
Nanocomposite Hydrogels

Tough PVA/GO nanocomposite hydrogel with well-developed anisotropic microstructure and excellent mechanical properties.

Bioinspired Layer-by-Layer Poly(vinyl alcohol) - Graphene Oxide Nanocomposites

2012 ◽  
Vol 1410 ◽  
Author(s):  
Charline Sellam ◽  
Zhi Zhai ◽  
Hediyeh Zahabi ◽  
Hua Deng ◽  
Emiliano Bilotti ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Composite Films ◽  
Good Control ◽  
Layered Composite ◽  
Poly Vinyl Alcohol ◽  
Layer By Layer ◽  
Synergic Effect ◽  
Transparent Film ◽  
Spraying Method

ABSTRACTA bottom-up approach for poly(vinyl alcohol) (PVA) - graphene oxide (GO) nanocomposites using a spraying method is presented. Very simple and versatile, spraying allows to build-up uniform layered composite films with good control on the structure of each layer. 150 bi-layers were deposited to create a transparent film with improved mechanical properties at a loading of 5.4 wt.% GO. The Young’s modulus and strength of these films doubled or nearly doubled which is believed to be due to a synergic effect as a result of the nanoscale organization of the composite by the 2D nanofiller, and hydrogen bonding between the PVA and the GO.

Sign in / Sign up

Export Citation Format

Share Document