Glycerol-plasticized spirulina-poly(vinyl alcohol) films with improved mechanical performance

2017 ◽  
Vol 134 (20) ◽  
Author(s):  
Bo Shi ◽  
Liang Liang ◽  
Hui Yang ◽  
Liming Zhang ◽  
Fuan He
Keyword(s):  
Vinyl Alcohol ◽  
Mechanical Performance ◽  
Poly Vinyl Alcohol

Apatite Deposition on Organic-Inorganic Hybrids Synthesized from Poly(Vinyl Alcohol) and Various Metal Oxides

2005 ◽  
Vol 284-286 ◽  
pp. 469-472 ◽  
Author(s):  
Caihong You ◽  
Toshiki Miyazaki ◽  
Eiichi Ishida ◽  
Masahiro Ashizuka ◽  
Chikara Ohtsuki ◽  
...  
Keyword(s):  
Metal Oxides ◽  
Vinyl Alcohol ◽  
Calcium Salt ◽  
Mechanical Performance ◽  
Bone Substitutes ◽  
Poly Vinyl Alcohol ◽  
Apatite Formation ◽  
Molybdenum Oxides ◽  
Apatite Deposition

Organic polymers with ability of apatite formation in body environment are expected as novel bone substitutes having not only bone-bonding ability, i.e. bioactivity, but also mechanical performance analogous to natural bone. Several metal oxides have been found to be effective for the apatite deposition in body environment. In addition, release of calcium ions from the materials significantly enhances it. In this study, we attempted to synthesize bioactive organic-inorganic hybrids from Poly(vinyl alcohol) (PVA) by incorporation of various metal oxides and calcium salt. Silica and molybdenum oxides were selected as metal oxides. Ability of apatite formation on the hybrids was examined in vitro using simulated body fluid (SBF, Kokubo solution). Apatite deposition were observed to occur on the surfaces of PVA/silica and PVA/molybdenum oxide hybrids in SBF, when their compositions were appropriately controlled.

High Mechanical Performance of Layered Graphene Oxide/Poly(vinyl alcohol) Nanocomposite Films

Small ◽  
2013 ◽  
Vol 9 (14) ◽  
pp. 2466-2472 ◽  
Author(s):  
Luqi Liu ◽  
Yun Gao ◽  
Qing Liu ◽  
Jun Kuang ◽  
Ding Zhou ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Mechanical Performance ◽  
Nanocomposite Films ◽  
Poly Vinyl Alcohol

Thermal and mechanical performance of electrospun chitosan/poly(vinyl alcohol) nanofibers with graphene oxide

2018 ◽  
Vol 1 (4) ◽  
pp. 722-730 ◽  
Author(s):  
Shuai Yang ◽  
Yongxu Liu ◽  
Zaixing Jiang ◽  
Jiyou Gu ◽  
Dawei Zhang
Keyword(s):  
Graphene Oxide ◽  
Vinyl Alcohol ◽  
Mechanical Performance ◽  
Poly Vinyl Alcohol

Bioactive Organic-Inorganic Hybrids Prepared from Poly(Vinyl Alcohol) via Modification with Metal Oxides and Calcium Salt

2006 ◽  
Vol 309-311 ◽  
pp. 1153-1156 ◽  
Author(s):  
Caihong You ◽  
Toshiki Miyazaki ◽  
Eiichi Ishida ◽  
Masahiro Ashizuka ◽  
Chikara Ohtsuki
Keyword(s):  
Metal Oxides ◽  
Titanium Oxide ◽  
Vinyl Alcohol ◽  
Calcium Salt ◽  
Mechanical Performance ◽  
Bone Substitutes ◽  
Poly Vinyl Alcohol ◽  
Apatite Formation ◽  
Apatite Deposition

Organic polymers with ability of apatite formation in body environment are expected as novel bone substitutes having not only bone-bonding ability, i.e. bioactivity, but also mechanical performance analogous to natural bone. Several metal oxides have been found to be effective for the apatite deposition in body environment. In addition, release of calcium ions from the materials significantly enhances it. In this study, we attempted to synthesize bioactive organic-inorganic hybrids from poly(vinyl alcohol) (PVA) by incorporation of titanium oxide or zirconium oxide as well as calcium salt. Ability of apatite formation on the hybrids was examined in vitro using simulated body fluid (SBF, Kokubo solution). Apatite deposition was observed to occur on the surfaces of PVA/titanium oxide hybrids in SBF, when their compositions were appropriately controlled.

Facile Preparation of Soy Protein/Poly(vinyl alcohol) Blend Fibers with High Mechanical Performance by Wet-Spinning

2013 ◽  
Vol 52 (18) ◽  
pp. 6177-6181 ◽  
Author(s):  
Dagang Liu ◽  
Changqing Zhu ◽  
Kai Peng ◽  
Yi Guo ◽  
Peter R. Chang ◽  
...  
Keyword(s):  
Soy Protein ◽  
Vinyl Alcohol ◽  
Mechanical Performance ◽  
Wet Spinning ◽  
Poly Vinyl Alcohol ◽  
Facile Preparation

scholarly journals The Incorporation of Carvacrol into Poly (vinyl alcohol) Films Encapsulated in Lecithin Liposomes

Polymers ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 497 ◽  
Author(s):  
Johana Andrade ◽  
Chelo González-Martínez ◽  
Amparo Chiralt
Keyword(s):  
Vinyl Alcohol ◽  
Food Packaging ◽  
Mechanical Performance ◽  
Barrier Properties ◽  
Poly Vinyl Alcohol ◽  
Degree Of Hydrolysis ◽  
Heterogeneous Structure ◽  
Crystallinity Degree ◽  
Induced Changes ◽  
Thermal Stability Of

Lecithin-encapsulated carvacrol has been incorporated into poly (vinyl alcohol) (PVA) for the purpose of obtaining active films for food packaging application. The influence of molecular weight (Mw) and degree of hydrolysis (DH) of the polymer on its ability to retain carvacrol has been analysed, as well as the changes in the film microstructure, thermal behaviour, and functional properties as packaging material provoked by liposome incorporation into PVA matrices. The films were obtained by casting the PVA aqueous solutions where liposomes were incorporated until reaching 0 (non-loaded liposomes), 5 or 10 g carvacrol per 100 g polymer. The non-acetylated, high Mw polymer provided films with a better mechanical performance, but less CA retention and a more heterogeneous structure. In contrast, partially acetylated, low Mw PVA gave rise to more homogenous films with a higher carvacrol content. Lecithin enhanced the thermal stability of both kinds of PVA, but reduced the crystallinity degree of non-acetylated PVA films, although it did not affect this parameter in acetylated PVA when liposomes contained carvacrol. The mechanical and barrier properties of the films were modified by liposome incorporation in line with the induced changes in crystallinity and microstructure of the films.

scholarly journals Poly(Vinyl Alcohol)-Based Nanofibrous Electrospun Scaffolds for Tissue Engineering Applications

Polymers ◽  
2019 ◽  
Vol 12 (1) ◽  
pp. 7 ◽  
Author(s):  
Marta A. Teixeira ◽  
M. Teresa P. Amorim ◽  
Helena P. Felgueiras
Keyword(s):  
Tissue Engineering ◽  
Vinyl Alcohol ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Poly Vinyl Alcohol ◽  
Electrospinning Technique ◽  
Electrospun Scaffolds ◽  
Nanofibrous Scaffolds ◽  
The Stability ◽  
The Many

Tissue engineering (TE) holds an enormous potential to develop functional scaffolds resembling the structural organization of native tissues, to improve or replace biological functions and prevent organ transplantation. Amongst the many scaffolding techniques, electrospinning has gained widespread interest because of its outstanding features that enable the production of non-woven fibrous structures with a dimensional organization similar to the extracellular matrix. Various polymers can be electrospun in the form of three-dimensional scaffolds. However, very few are successfully processed using environmentally friendly solvents; poly(vinyl alcohol) (PVA) is one of those. PVA has been investigated for TE scaffolding production due to its excellent biocompatibility, biodegradability, chemo-thermal stability, mechanical performance and, most importantly, because of its ability to be dissolved in aqueous solutions. Here, a complete overview of the applications and recent advances in PVA-based electrospun nanofibrous scaffolds fabrication is provided. The most important achievements in bone, cartilage, skin, vascular, neural and corneal biomedicine, using PVA as a base substrate, are highlighted. Additionally, general concepts concerning the electrospinning technique, the stability of PVA when processed, and crosslinking alternatives to glutaraldehyde are as well reviewed.

scholarly journals Structure and Mechanical Performance of Poly(vinyl Alcohol) Nanocomposite by Incorporating Graphitic Carbon Nitride Nanosheets

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 610 ◽  
Author(s):  
Shaojian He ◽  
Jiaqi Wang ◽  
Mengxia Yu ◽  
Yang Xue ◽  
Jianbin Hu ◽  
...  
Keyword(s):  
Vinyl Alcohol ◽  
Carbon Nitride ◽  
Mechanical Performance ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Poly Vinyl Alcohol ◽  
Solution Casting ◽  
Force Microscopy ◽  
Atomic Force ◽  
Carbon Nitride Nanosheets

Owing to the high aspect ratio, the two-dimensional (2D) inorganic nanofillers have attracted extensive interest in the field of polymer reinforcement. In this work, graphitic carbon nitride (g-C3N4) nanosheets were obtained via thermal condensation of melamine and were then ultrasonically exfoliated in water, which was confirmed by atomic force microscopy (AFM) and TEM. Poly(vinyl alcohol) (PVA)/g-C3N4 nanocomposites were achieved by solution casting using water as the solvent. The structure and mechanical performance of PVA/g-C3N4 nanocomposites were studied. It was found that the g-C3N4 nanosheets were well dispersed in the PVA matrix. The introduction of g-C3N4 nanosheets increased the glass transition temperature and crystallinity of the nanocomposites, leading to the improved mechanical performance. Compared with the pure PVA, the PVA/g-C3N4 nanocomposite with 0.50 wt% g-C3N4 nanosheets showed ~70.7% enhancement in tensile strength, up from 51.2 MPa to 87.4 MPa.

Sign in / Sign up

Export Citation Format

Share Document