Microstructure and Thermal and Tensile Properties of Poly(vinyl alcohol) Nanocomposite Films Reinforced by Polyacrylamide Grafted Cellulose Nanocrystals

2020 ◽  
Vol 59 (4) ◽  
pp. 223-234 ◽  
Author(s):  
Bengang Li ◽  
Chao Wu ◽  
Yandan Zhang ◽  
Xuzhi Cao ◽  
Zhenyang Luo
Keyword(s):  
Tensile Properties ◽  
Cellulose Nanocrystals ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol

scholarly journals Effect of Incorporating Cellulose Nanocrystals from Corncob on the Tensile, Thermal and Barrier Properties of Poly(Vinyl Alcohol) Nanocomposites

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Hudson Alves Silvério ◽  
Wilson Pires Flauzino Neto ◽  
Daniel Pasquini
Keyword(s):  
Cellulose Nanocrystals ◽  
Vinyl Alcohol ◽  
Average Length ◽  
Close Association ◽  
Visible Region ◽  
Barrier Properties ◽  
Nanocomposite Films ◽  
Light Transmittance ◽  
Poly Vinyl Alcohol ◽  
Vapor Permeability

The effect of incorporating cellulose nanocrystals from corncob (CNC) on the tensile, thermal, and barrier properties of poly(vinyl alcohol) (PVA) nanocomposites was evaluated. The CNC were prepared by sulfuric acid hydrolysis at 45°C for 60 minutes, using 15 mL of H2SO4(9.17 M) for each gram of fiber. The CNC60presented a needle-shaped morphology, high crystallinity (83.7%), good initial degradation temperature (236°C), average length (L) of210.8±44.2 nm, diameter (D) of4.15±1.08 nm, and high aspect ratio (L/D) of53.4±15.8. PVA/CNC nanocomposite films with different filler loading levels (3, 6, and 9% by wt) were prepared by casting. The ultimate tensile strength (UTS), thermal stability (TS), light transmittance (Tr) and water vapor permeability (Pw) of the nanocomposites were measured. When compared to neat PVA film, the UTS of the nanocomposites improved significantly, by 140.2%,Pwdecreased up to 28.73%, and there were no significant changes in TS. The nanocomposites also showed excellent Tr in the visible region, maintaining substantially equivalent transparency. These improvements in the nanocomposites' properties suggest a close association between filler and matrix, besides indicating that the CNC were well dispersed and adherent to the polymer matrix.

High barrier graphene oxide nanosheet/poly(vinyl alcohol) nanocomposite films

2012 ◽  
Vol 409-410 ◽  
pp. 156-163 ◽  
Author(s):  
Hua-Dong Huang ◽  
Peng-Gang Ren ◽  
Jun Chen ◽  
Wei-Qin Zhang ◽  
Xu Ji ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Graphene Oxide Nanosheet

Reinforcement with cellulose nanocrystals of poly(vinyl alcohol) hydrogels prepared by cyclic freezing and thawing

Soft Matter ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 2373 ◽  
Author(s):  
Tiffany Abitbol ◽  
Timothy Johnstone ◽  
Thomas M. Quinn ◽  
Derek G. Gray
Keyword(s):  
Cellulose Nanocrystals ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Freezing And Thawing

Properties of Poly(Vinyl Alcohol)/Chitosan Nanocomposite Films Reinforced with Oil Palm Empty Fruit Bunch Amorphous Lignocellulose Nanofibers

2018 ◽  
Vol 26 (8) ◽  
pp. 3316-3333 ◽  
Author(s):  
Achmad Solikhin ◽  
Yusuf Sudo Hadi ◽  
Muh Yusram Massijaya ◽  
Siti Nikmatin ◽  
Shigehiko Suzuki ◽  
...  
Keyword(s):  
Oil Palm ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Empty Fruit Bunch ◽  
Lignocellulose Nanofibers

Radiation – induced preparation of polyaniline/poly vinyl alcohol nanocomposites and their properties

2019 ◽  
Vol 107 (8) ◽  
pp. 725-735
Author(s):  
Hoda H. Saleh ◽  
Rehab Sokary ◽  
Zakaria I. Ali
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Vinyl Alcohol ◽  
Oxidative Polymerization ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol ◽  
Transmission Electron ◽  
Scanning Electron

Abstract Polyaniline (PANI) nanoparticles and PANI/poly vinyl alcohol (PVA) nanocomposite films were synthesized by the oxidative polymerization of aniline and ammonium peroxodisulfate (APS), as an oxidizing agent in aqueous medium. The PANI/PVA nanocomposite films were exposed to γ-irradiation after oxidative polymerization. Synthesized polyaniline (PANI) nanoparticles and PANI/PVA nanocomposite films were characterized by attenuated total reflectance infrared spectroscopy (FTIR-ATR), X-ray diffraction, high resolution scanning electron microscopy, (HRSEM) high resolution transmission electron microscopy, (HRTEM) and UV-VIS absorption spectroscopy. Energy band gap of PANI nanofibers was determined from Tauc’s plots which equal 4.2 eV. Scanning electron microscopy images show that chemically synthesized of polyaniline has nanofibers structure and irradiated PANI/PVA nanocomposite have a mixture of nanorod and nanosphere structures. The transmission electron microscopy show that chemically synthesized of polyaniline has average length in the range 34 ± 10 nm with less wide distribution, where as the irradiated PANI/PVA nanocomposite has coreshell structure.

Poly(vinyl alcohol) nanocomposite films containing chemically exfoliated molybdenum disulfide

2013 ◽  
Vol 137 (3) ◽  
pp. 764-771 ◽  
Author(s):  
Ketlin Cristine Batista Mancinelli ◽  
Fabio da Silva Lisboa ◽  
Jaisa Fernandes Soares ◽  
Sonia Faria Zawadzki ◽  
Fernando Wypych
Keyword(s):  
Molybdenum Disulfide ◽  
Vinyl Alcohol ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol

Nanocomposite films based on chitosan–poly(vinyl alcohol) and silver nanoparticles with high antibacterial and antioxidant activities

2017 ◽  
Vol 111 ◽  
pp. 112-121 ◽  
Author(s):  
Sawssen Hajji ◽  
Rabeb Ben Slama-Ben Salem ◽  
Marwa Hamdi ◽  
Kemel Jellouli ◽  
Wajdi Ayadi ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Vinyl Alcohol ◽  
Antioxidant Activities ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol
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