Synthesis of Poly(vinyl alcohol)/Chitosan/Titanium Oxide Beads

2013 ◽  
Vol 65 (4) ◽  
Author(s):  
Syazwan Liyana Sulaiman ◽  
Zawati Harun ◽  
Sufizar Ahmad ◽  
Hariati Taib
Keyword(s):  
Wastewater Treatment ◽  
Titanium Oxide ◽  
Alkaline Solution ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Distilled Water ◽  
Swelling Properties ◽  
Promising Alternative ◽  
Porous Beads ◽  
Mean Time

The application of photocatalytic beads in wastewater treatment application has gained attention of many researchers. In this study, the synthesised poly(vinyl alcohol)/chitosan/Titanium oxide (PVA/CS/TiO2) beads has been considered as a promising alternative to conventional means of wastewater treatment. The present study has successfully synthesised PVA/CS/TiO2 beads through simple dropwise method in which varied concentration of CS from 1.0 g to 2.5 g. Morphological analysis of the synthesised PVA/CS/TiO2 beads investigated by the FE-SEM technique revealed that porous beads were obtained regardless of the varied CS concentration content. Furthermore, solubility and swelling properties investigation of the beads were also performed within the prescribed time of 24h in three different medium which were acidic, distilled water and alkaline solution. Result of solubility test proved that PVA/CS/TiO2 beads were insoluble only in distilled water and alkaline solution. However, the beads were found to dissolve in acidic solution due to the CS content. Meanwhile, the swelling test revealed that increased concentration of CS leads to swelling of beads in distilled water and alkaline solution. Results revealed that beads with the highest CS composition which is 2.5 g recorded 82.6% and 118.4% of swelling in distilled water and alkaline solution, respectively. In the mean time, beads with the lowest CS composition which is 1.0 g only swell for 65.8% and 93.3% in distilled water and alkaline solution, respectively. As a conclusion, the synthesised beads in this study is feasible to be applied in natural to alkaline environment.

Synthesis of Poly(vinyl alcohol)/Chitosan/Silicon Oxide Beads Untreated and Glutaraldehyde Treated

2014 ◽  
Vol 893 ◽  
pp. 27-30
Author(s):  
Syazwan Liyana Sulaiman ◽  
Muhamad Subri Abu Bakar ◽  
Sufizar Ahmad ◽  
Hariati Taib
Keyword(s):  
Alkaline Solution ◽  
Silicon Oxide ◽  
Acidic Solution ◽  
Metal Removal ◽  
Heavy Metal Removal ◽  
Poly Vinyl Alcohol ◽  
Cross Linking ◽  
Distilled Water ◽  
Swelling Behaviour ◽  
Promising Alternative

Synthesised PVA/CS/SiO2 beads had been considered as a promising alternative to conventional means of heavy metal removal. The PVA/CS/SiO2 beads were successfully synthesised through a simple dropwise method and different ratio of cross-linking agent, glutaraldehyde (GLA) of 0, 0.25M and 0.5M were used to cross-link the PVA/CS/SiO2 beads. Solubility and swelling behavior of the beads were also investigated within the prescribed time of 24h in three different medium of acidic, distilled water and alkaline solution. Result of solubility test showed that PVA/CS/SiO2 beads without GLA dissolves in acidic medium but insoluble in distilled water and alkaline solution. Meanwhile, the PVA/CS/SiO2 beads cross-linked with GLA did not dissolve in all three mediums. The swelling test revealed that PVA/CS/SiO2 beads without cross-linked with GLA showed the highest of swelling in acidic solution which was 225.2% and PVA/CS/SiO2 beads cross-linked with 0.5M GLA recorded the lowest of swelling in acidic solution which was 98.6%. This concluded that as the cross-linking ratio increased, the swelling behaviour of the PVA/CS/SiO2 beads decreased.

Hybrid nanocomposites based on graft copolymer of chitosan with poly(vinyl alcohol) and titanium oxide

2009 ◽  
Vol 4 (5-6) ◽  
pp. 331-339 ◽  
Author(s):  
A. N. Ozerin ◽  
N. S. Perov ◽  
A. N. Zelenetskii ◽  
T. A. Akopova ◽  
L. A. Ozerina ◽  
...  
Keyword(s):  
Titanium Oxide ◽  
Graft Copolymer ◽  
Vinyl Alcohol ◽  
Hybrid Nanocomposites ◽  
Poly Vinyl Alcohol

scholarly journals POLY(VINYL ALCOHOL) AND POLY(VINYL ALCOHOL) /ZINC OXIDE COMPOSITE NANOFIBRE WEBS: QUALITY CONTROL WITH CONDUCTOMETER

2017 ◽  
Vol 3 ◽  
pp. 316
Author(s):  
Eva Trumsina ◽  
Zane Zelca ◽  
Silvija Kukle
Keyword(s):  
Quality Control ◽  
Zinc Oxide ◽  
Sample Preparation ◽  
Vinyl Alcohol ◽  
Textile Industry ◽  
Poly Vinyl Alcohol ◽  
Distilled Water ◽  
Textile Materials ◽  
It Impacts ◽  
Nano Size

In the market a wide variety of products are find that contains/releases metal nanoparticles, therefore topical become researches on it impacts on the environment and human health. In the textile industry important step is the development of testing methodology to monitor the quantity of nanoparticles that get into the environment from nanoparticles containing textile materials. In the study analyzed the method based on the use of conductometer for textiles testing with nano-size metal oxides content to determine the persistence of nanoparticles/ions in the water after textile soaking/washing. Compared results acquired in the experiments with nanofibre webs manufactured by electrospinning from pure polyvinyl alcohol (PVA) and PVA/ZnO composite. The nanofibre webs were soaked in distilled water and obtained samples of water tested with conductometer. The results of the experiments confirm that measurements taken with the conductometer are fairly stable and repeatable; the equipment is suitable for measurements in distilled water for nanoparticles/ions detection. The measurements of the solution’s specific electric conductance allows to pinpoint the nanoparticles/ions concentration, but for this purpose, must be created the database that contains the resources needed for the calculations and methodology for sample preparation.

Harnessing a byproduct from wastewater treatment to obtain improved starch/poly(vinyl alcohol) composites

2020 ◽  
Vol 238 ◽  
pp. 115777 ◽  
Author(s):  
Celina Maria Damian ◽  
Cristina Ott ◽  
Raluca Stan ◽  
Anamaria Hanganu ◽  
Roxana Trusca ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol

scholarly journals Optimized swelling properties of hydrogels based on poly(vinyl alcohol)-carrageenan

2020 ◽  
Author(s):  
D. Rahmi ◽  
S. Paramadina ◽  
M. Anjelika ◽  
R. Widjajanti
Keyword(s):  
Vinyl Alcohol ◽  
Poly Vinyl Alcohol ◽  
Swelling Properties

scholarly journals Synthesis and Characterization of Poly(Vinyl Alcohol)-Chitosan-Hydroxyapatite Scaffolds: A Promising Alternative for Bone Tissue Regeneration

Molecules ◽  
2018 ◽  
Vol 23 (10) ◽  
pp. 2414 ◽  
Author(s):  
Sergio Pineda-Castillo ◽  
Andrés Bernal-Ballén ◽  
Cristian Bernal-López ◽  
Hugo Segura-Puello ◽  
Diana Nieto-Mosquera ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Tissue Regeneration ◽  
Vinyl Alcohol ◽  
Statistical Significance ◽  
Cell Communication ◽  
Mechanical Tests ◽  
Bone Tissue Regeneration ◽  
Poly Vinyl Alcohol ◽  
Regeneration System ◽  
Promising Alternative

Scaffolds can be considered as one of the most promising treatments for bone tissue regeneration. Herein, blends of chitosan, poly(vinyl alcohol), and hydroxyapatite in different ratios were used to synthesize scaffolds via freeze-drying. Mechanical tests, FTIR, swelling and solubility degree, DSC, morphology, and cell viability were used as characterization techniques. Statistical significance of the experiments was determined using a two-way analysis of variance (ANOVA) with p < 0.05. Crosslinked and plasticized scaffolds absorbed five times more water than non-crosslinked and plasticized ones, which is an indicator of better hydrophilic features, as well as adequate resistance to water without detriment of the swelling potential. Indeed, the tested mechanical properties were notably higher for samples which were undergone to crosslinking and plasticized process. The presence of chitosan is determinant in pore formation and distribution which is an imperative for cell communication. Uniform pore size with diameters ranging from 142 to 519 µm were obtained, a range that has been described as optimal for bone tissue regeneration. Moreover, cytotoxicity was considered as negligible in the tested conditions, and viability indicates that the material might have potential as a bone regeneration system.

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