Morphology Effect on Zinc Oxide Quantum Photoinitiators for Radical Polymerization

Nanoscale ◽  
2021 ◽  
Author(s):  
Alex Pinkas ◽  
Nir Waiskopf ◽  
Shira Gigi ◽  
Tom Naor ◽  
Almog Layani ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Radical Polymerization ◽  
Semiconductor Nanocrystals ◽  
Viable Alternative ◽  
Morphology Effect

Semiconductor nanocrystals based photoinitiators, quantum PIs, are a viable alternative for organic photoinitiators demonstrating unique advantages, including a broad and tunable excitation window, limited migration, and more. Aiming towards efficient...

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.

scholarly journals Tunable Quantum Photoinitiators for Radical Photopolymerization

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2694
Author(s):  
Shubhangi Shukla ◽  
Prem C. Pandey ◽  
Roger J. Narayan
Keyword(s):  
Quantum Dots ◽  
Metal Oxides ◽  
Radical Polymerization ◽  
Mechanism Of Action ◽  
Carbon Dots ◽  
Semiconductor Nanocrystals ◽  
Metal Sulfides ◽  
Cross Linking ◽  
Reversible Deactivation ◽  
Reversible Deactivation Radical Polymerization

This review describes the use of nanocrystal-based photocatalysts as quantum photoinitiators, including semiconductor nanocrystals (e.g., metal oxides, metal sulfides, quantum dots), carbon dots, graphene-based nanohybrids, plasmonic nanocomposites with organic photoinitiators, and tunable upconverting nanocomposites. The optoelectronic properties, cross-linking behavior, and mechanism of action of quantum photoinitiators are considered. The challenges and prospects associated with the use of quantum photoinitiators for processes such as radical polymerization, reversible deactivation radical polymerization, and photoinduced atom transfer radical polymerization are reviewed. Due to their unique capabilities, we forsee a growing role for quantum photoinitiators over the coming years.

Atom-Transfer Radical Polymerization on Zinc Oxide Nanowires

2006 ◽  
Vol 18 (21) ◽  
pp. 5045-5051 ◽  
Author(s):  
Benjamin L. Rupert ◽  
Martin J. Mulvihill ◽  
John Arnold
Keyword(s):  
Zinc Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Atom Transfer ◽  
Zinc Oxide Nanowires ◽  
Oxide Nanowires

scholarly journals Poly(Glycidyl Methacrylates)-grafted Zinc Oxide Nanowire by Surface-initiated Atom Transfer Radical Polymerization

2010 ◽  
Vol 2 (4) ◽  
pp. 285-289 ◽  
Author(s):  
Bao Zhang ◽  
Nantao Hu ◽  
Yanfang Wang ◽  
Zi Wang ◽  
Ying Wang ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Atom Transfer ◽  
Zinc Oxide Nanowire

Temperature-responsive zinc oxide nanorods arrays grafted with poly(N-isopropylacrylamide) via SI-ATRP

RSC Advances ◽  
2015 ◽  
Vol 5 (76) ◽  
pp. 62024-62032 ◽  
Author(s):  
Qian Feng ◽  
Dongyan Tang ◽  
Haitao Lv ◽  
Weile Zhang ◽  
Wenbo Li
Keyword(s):  
Zinc Oxide ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Atom Transfer ◽  
Temperature Responsive ◽  
Oxide Nanorods

Nanocomposites based on ZnO nanorods, with photocatalysis and temperature responsibility, could be fabricated by grafting poly(N-isopropylacrylamide) PNIPAM via surface-initiated atom transfer radical polymerization (SI-ATRP).

scholarly journals Doped Semiconductor Nanocrystals: Development and Applications

2021 ◽  
Author(s):  
Anielle C.A. Silva ◽  
Eliete A. Alvin ◽  
Francisco R.A. dos Santos ◽  
Samanta L.M. de Matos ◽  
Jerusa M. de Oliveira ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Semiconductor Nanocrystals ◽  
Sodium Titanate ◽  
Biological Properties ◽  
Toxic Effects ◽  
Significant Progress ◽  
Bacterial Diseases ◽  
Physical Chemical ◽  
Glassy Systems

This chapter aims to show significant progress that our group has been developing and the applications of several doped semiconductor nanocrystals (NCs), as nanopowders or embedded in glass systems. Depending on the type of dopant incorporated in the nanocrystals, the physical, chemical, and biological properties can be intensified. However, it can also generate undesired toxic effects that can potentially compromise its use. Here we present the potential of zinc oxide NCs doped with silver (Ag), gold (Au), and magnesium (Mg) ions to control bacterial diseases in agriculture. We have also performed biocompatibility analysis of the pure and Ag-doped sodium titanate (Na2Ti3O7) NCs in Drosophila. The doped nanocrystals embedded in glassy systems are chrome (Cr) or copper (Cu) in ZnTe and Bi2Te3 NCs for spintronic development nanodevices. Therefore, we will show several advantages that doped nanocrystals may present in the technological and biotechnological areas.

Extraction and identification of fillers and pigments from pyrolyzed rubber and tire samples

1996 ◽  
Vol 54 ◽  
pp. 174-175
Author(s):  
P. Sadhukhan ◽  
J. B. Zimmerman
Keyword(s):  
Zinc Oxide ◽  
Electron Microscope ◽  
Carbon Black ◽  
Natural Rubber ◽  
Transmission Electron Microscope ◽  
Rolling Resistance ◽  
Synthetic Polymers ◽  
Nitrogen Atmosphere ◽  
Transmission Electron ◽  
Curing Agents

Rubber stocks, specially tires, are composed of natural rubber and synthetic polymers and also of several compounding ingredients, such as carbon black, silica, zinc oxide etc. These are generally mixed and vulcanized with additional curing agents, mainly organic in nature, to achieve certain “designing properties” including wear, traction, rolling resistance and handling of tires. Considerable importance is, therefore, attached both by the manufacturers and their competitors to be able to extract, identify and characterize various types of fillers and pigments. Several analytical procedures have been in use to extract, preferentially, these fillers and pigments and subsequently identify and characterize them under a transmission electron microscope.Rubber stocks and tire sections are subjected to heat under nitrogen atmosphere to 550°C for one hour and then cooled under nitrogen to remove polymers, leaving behind carbon black, silica and zinc oxide and 650°C to eliminate carbon blacks, leaving only silica and zinc oxide.

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