scholarly journals Ascorbic Acid for the Safe Use of a Sunscreen Agent: Accumulation of Nano Zinc Oxide and Titanium Dioxide on the Skin

2013 ◽  
Vol 81 (4) ◽  
pp. 1141-1150 ◽  
Author(s):  
Anahita Fathi-Azarbayjani
Keyword(s):  
Ascorbic Acid ◽  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Nano Zinc Oxide ◽  
Nano Zinc

scholarly journals Preparation of Nanocomposite Alginate Fibers Modified with Titanium Dioxide and Zinc Oxide

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1040
Author(s):  
Dominik Borkowski ◽  
Izabella Krucińska ◽  
Zbigniew Draczyński
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Antibacterial Properties ◽  
Natural Polymers ◽  
Nano Zinc Oxide ◽  
Nano Additives ◽  
Alginate Fibers ◽  
Nano Zinc ◽  
Nano Titanium Dioxide ◽  
Selection Of

Active dressings based on natural polymers are becoming increasingly popular on the market. One of such polymers is alginate, which is characterized by biodegradability, resorbability, has no carcinogenic properties, does not have allergenic or hemostatic properties, and has a confirmed lack of toxicity. However, this polymer does not show biocidal and biostatic properties, therefore the purpose of this research was to select the appropriate conditions for the production of calcium alginate fibers modified with nano titanium dioxide and nano zinc oxide. It was assumed that the presence of nano metal oxide fillers will give antibacterial properties to formed fibers, which were used to form nonwovens. The following article presents a comparative analysis of nonwovens made of alginate fibers, without nano additives, with nonwovens made of alginate fibers containing in their structure 7% titanium dioxide and nonwovens made of alginate fibers containing 2% ZnO. The selection of the nano additive content was determined by the spinning ability of the developed polymer solutions. Based on the results contained in the article, it was found that the introduction of modifiers in the structure of fibers increases the diameter of the fiber pores, which improves the sorption and retention properties of the obtained fibers, and also gives differentiated antibacterial properties to the obtained nonwovens depending on the type of nano additive used. Greater activity against Escherichia coli, Staphylococcus aureus strains and Aspergillus Niger molds was shown in nonwovens made of 2% ZnO modified fibers compared to nonwovens made from TiO2 modified fibers.

Synthesis and characterization of metal doped nano zinc oxide on titanium dioxide seeded substrate

2019 ◽  
Author(s):  
S. Z. Umbaidilah ◽  
N. A. M. Asib ◽  
A. N. Afaah ◽  
M. Rusop ◽  
Z. Khusaimi
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Synthesis And Characterization ◽  
Nano Zinc Oxide ◽  
Metal Doped ◽  
Nano Zinc

Preparation and properties of composite particles made by nano zinc oxide coated with titanium dioxide

2006 ◽  
Vol 41 (18) ◽  
pp. 5845-5850 ◽  
Author(s):  
W. Wu ◽  
Y-W. Cai ◽  
J-F. Chen ◽  
S-L. Shen ◽  
A. Martin ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Titanium Dioxide ◽  
Composite Particles ◽  
Nano Zinc Oxide ◽  
Nano Zinc

Effect of Calcination on the Basic Strength of Surface Modified Nano-Zinc Oxide Characterised by FTIR and Back Titration Methods

2015 ◽  
Vol 1107 ◽  
pp. 326-332
Author(s):  
Abdul Rahim Yacob ◽  
Kamaluddeen Suleiman Kabo
Keyword(s):  
Zinc Oxide ◽  
Metal Oxides ◽  
Base Catalysis ◽  
Nano Zinc Oxide ◽  
Back Titration ◽  
And Performance ◽  
Nano Zinc ◽  
Surface Modified ◽  
Heterogeneous Base ◽  
Basic Strength

The use of metal oxides in heterogeneous base catalysis has gained a large interest due to their application in many chemical and industrial processes and is environmental friendly. Basic metal oxides are commonly used and their structures, morphology and performance can be modified by method of preparation and thermal activation. In this study, surface modified amphoteric zinc oxide was prepared via hydration-dehydration method and characterised by TGA and FTIR. The basic strength at various temperatures is characterised by FTIR and back titration analyses. The results shows that surface modified zinc oxide has the highest basic strength of 1.453mmolg-1at 400°C making it a relatively good and suitable compound for use in heterogeneous basic catalysis. This result is also supported by FTIR spectra which show possible relationship between the Lewis O2-and increasing basic strength.

Study on the Viscosity and Dispersion Stability of AA-AMPS Copolymer on Nano Zinc Oxide

2014 ◽  
Vol 692 ◽  
pp. 288-291
Author(s):  
Yue Long Liu ◽  
Jia Liu
Keyword(s):  
Zinc Oxide ◽  
Radical Polymerization ◽  
Polyacrylic Acid ◽  
Sulfonic Acid ◽  
Dispersion Stability ◽  
Polymerization Process ◽  
Mass Ratio ◽  
Nano Zinc Oxide ◽  
Nano Zinc

The copolymer of sodium polyacrylic acid and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) was prepared by radical polymerization process, the effect of mass ratio of AA/AMPS on the viscosity of AA-AMPS copolymer were investigated. Results showed that when the mole ratio of AA/AMPS was 3:1, it had the least viscosity. The dispersion stability of synthesized AA-AMPS copolymer for nanozinc oxide was tested.

Basic zinc carbonate as a precursor in the solvothermal synthesis of nano-zinc oxide

2015 ◽  
Vol 86 ◽  
pp. 347-353 ◽  
Author(s):  
Alojz Anžlovar ◽  
Marjan Marinšek ◽  
Zorica Crnjak Orel ◽  
Majda Žigon
Keyword(s):  
Zinc Oxide ◽  
Solvothermal Synthesis ◽  
Zinc Carbonate ◽  
Nano Zinc Oxide ◽  
Nano Zinc
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