Titanium dioxide pigments

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gerhard Pfaff
Keyword(s):  
Titanium Dioxide ◽  
Surface Treatment ◽  
Organic Matrix ◽  
Visible Range ◽  
White Pigment ◽  
Application System ◽  
Application Systems ◽  
Sulfate Process ◽  
Weather Resistance ◽  
The Stability

Abstract Titanium dioxide (TiO2) is by far the most important white pigment. The extraordinary scattering behavior of TiO2 together with the lack of absorption in the visible range and the stability in different application systems is the reason why TiO2 is the most commonly used pigment. Of the three TiO2 modifications, only rutile and anatase play a role for pigment uses, whereas brookite has no technical importance. Two main processes are used for the production of TiO2 pigments, the sulfate process and the chloride process. Many TiO2 pigments are equipped with an additional surface treatment (aftertreatment) to improve weather resistance and lightfastness of the pigment itself and of the pigmented organic matrix. A second aim of the surface treatment is the improvement of the dispersibility of the pigments in the application system.

A Review: Research into Organic Surface Treatment of Titanium Dioxide Material

2018 ◽  
Vol 914 ◽  
pp. 193-201 ◽  
Author(s):  
Xiao Ping Wu ◽  
Chan Liu ◽  
Yong Liu ◽  
Teng Fei Hou ◽  
Z. Wu
Keyword(s):  
Titanium Dioxide ◽  
Surface Treatment ◽  
Storage Stability ◽  
Particle Surface ◽  
Interaction Mechanism ◽  
White Pigment ◽  
Industrial Processing ◽  
Particle Mobility ◽  
Solvent Water ◽  
And Storage

Titanium dioxide is currently the most important white pigment material used in the world and its surface properties are very important for consumer industries such as paints, papermaking and plastics. If agglomerates are present, the down-stream product properties such as gloss, opacity, and storage stability will be greatly affected. The addition of organic surface treatment agents onto the surface of titanium dioxide particles can change its surface: reduce the inter-particle forces to reduce particle agglomerates; change the hydrophobic or hydrophilic properties of particle surface to enhance the compatibility with the solvent, water, or organic resin; can also improve the particle mobility and industrial processing. Therefore, it is very important to fully understand the interaction mechanism between pigment particles and functional organic surface treatment agents. This paper summarizes the related research results and progress.

Metal effect pigments

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Gerhard Pfaff ◽  
Michael R. Bartelt ◽  
Frank J. Maile
Keyword(s):  
Construction Materials ◽  
Application System ◽  
Metallic Particles ◽  
Application Systems ◽  
Specific Composition ◽  
Printing Inks ◽  
Copper Zinc ◽  
The Stability ◽  
The Individual ◽  
Metal Effect

Abstract Metal effect pigments are luster pigments consisting of platelet-like metallic particles, mostly of aluminum (so-called silver bronzes), copper, copper/zinc (so-called gold bronzes), and zinc flakes. After parallel orientation in their application medium, they show a metal-like luster by reflection of light at the surface of the flat metal particles in one direction. Thus, the pigment particles act similar to small mirrors and lead when orientated parallel in the application system to a reflecting metal luster (metallic effect). Metal effect pigments are used in all relevant application systems such as coatings, paints, plastics, artist paints, cosmetics, printing inks, leather, construction materials, paper, glass, and ceramics. Specific composition, particle size distribution and surface quality determine the coloristic and application technical properties of the individual pigments. Many pigments are coated with a specific surface treatment to improve the quality concerning the stability and the compatibility with the application system. Metal effect pigments are offered in form of powders, pastes, pellets, suspensions or color concentrates. They are manufactured starting from a metal granulate (grit), which is ground under formation of flakes.

scholarly journals A titanium dioxide–carbon nanotube hybrid to simultaneously achieve the mechanical enhancement of natural rubber and its stability under extreme frictional conditions

2021 ◽  
Vol 2 (7) ◽  
pp. 2408-2418
Author(s):  
Le Wan ◽  
Cong Deng ◽  
Ze-Yong Zhao ◽  
Hai-Bo Zhao ◽  
Yu-Zhong Wang
Keyword(s):  
Titanium Dioxide ◽  
Carbon Nanotube ◽  
Natural Rubber ◽  
Titanium Oxide ◽  
The Stability

Titanium oxide-carbon nanotube hybrids may efficiently promote the stability of nature rubber under extreme frictional conditions.

Antimicrobial and Antibiofilm Effects of Silver Nanoparticles Produced by Yarrowia lipolytica Against Vegetative and Starved Shigella

NANO ◽  
2021 ◽  
pp. 2150088
Author(s):  
Kalthoum Chourabi ◽  
Lobna Elleuch ◽  
Salma Kloula ◽  
Ahmed Landoulsi ◽  
Abdelwaheb Chatti
Keyword(s):  
Silver Nanoparticles ◽  
Yarrowia Lipolytica ◽  
Nitrate Solution ◽  
Silver Nitrate Solution ◽  
Water Disinfection ◽  
Personal Hygiene ◽  
Visible Range ◽  
Significant Toxicity ◽  
Air Disinfection ◽  
The Stability

Silver nanoparticles have attracted much interest from scientists to develop nanosilver-based disinfectant products due to their unique properties of high antimicrobial activity. This study focused on biosynthesis, characterization, antimicrobial and antibiofilm effects of silver nanoparticles against vegetative and starved Shigella strains. The silver nanoparticles were synthesized using the yeast Yarrowia lipolytica and characterized by ultraviolet–visible spectroscopy, X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. The antimicrobial and antibiofilm activities of silver nanoparticles were tested against the growth of vegetative and starved Shigella strains. After the addition of silver nitrate solution to the supernatant of Y. lipolytica, we noticed the appearance of a brown-black coloration that suggested the formation of silver nanoparticles. The presence of silver nanoparticles was manifested by a maximum absorption in the ultraviolet–visible range, precisely at the wavelength 420[Formula: see text]nm. The crystalline nature and the stability of silver nanoparticles were confirmed, respectively, by XRD and FTIR analysis. The antibacterial activity of silver nanoparticles showed significant toxicity on Shigella strains indicating that the starved cells were more sensitive to treatment with silver nanoparticles than vegetative cells. Surprisingly, the biofilm formation had not been inhibited by silver nanoparticles for both vegetative and starved cells. In conclusion, a new class of nanosilver containing disinfectant nanoproducts will be promising for advanced environmental treatments including air disinfection, water disinfection, surface disinfection and personal hygiene that will help to prevent the further outbreak of diseases.

scholarly journals Thermal Properties and Non-Isothermal Crystallization Kinetics of Poly (δ-Valerolactone) and Poly (δ-Valerolactone)/Titanium Dioxide Nanocomposites

Crystals ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 452 ◽  
Author(s):  
Waseem Saeed ◽  
Abdel-Basit Al-Odayni ◽  
Abdulaziz Alghamdi ◽  
Ali Alrahlah ◽  
Taieb Aouak
Keyword(s):  
Titanium Dioxide ◽  
Crystallization Kinetics ◽  
Isothermal Crystallization ◽  
Three Dimensional ◽  
Degree Of Crystallinity ◽  
Simultaneous Occurrence ◽  
Scanning Calorimetry ◽  
Isothermal Crystallization Kinetics ◽  
The Stability ◽  
Kinetics Of

New poly (δ-valerolactone)/titanium dioxide (PDVL/TiO2) nanocomposites with different TiO2 nanoparticle loadings were prepared by the solvent-casting method and characterized by Fourier transform infra-red, differential scanning calorimetry, X-ray diffraction and scanning electron microscopy, and thermogravimetry analyses. The results obtained reveal good dispersion of TiO2 nanoparticles in the polymer matrix and non-formation of new crystalline structures indicating the stability of the crystallinity of TiO2 in the composite. A significant increase in the degree of crystallinity was observed with increasing TiO2 content. The non-isothermal crystallization kinetics of the PDVL/TiO2 system indicate that the crystallization process involves the simultaneous occurrence of two- and three-dimensional spherulitic growths. The thermal degradation analysis of this nanocomposite reveals a significant improvement in the thermal stability with increasing TiO2 loading.

Permission Centralized Control System Based on LDAP and Module

2014 ◽  
Vol 494-495 ◽  
pp. 1262-1265
Author(s):  
Jian Tang ◽  
Chang Shui Xiao ◽  
Jian Ping Wu
Keyword(s):  
Control System ◽  
Access Control ◽  
User Experience ◽  
Centralized Control ◽  
Application System ◽  
Management Efficiency ◽  
Application Systems ◽  
Systems And Control ◽  
Management Functions ◽  
And Control

The users and permission management functions of multiple application system will increase management complexity, reduce the convenience of users using.Analyze the module features of application system , LDAP technology , XML and RBAC technologies,etc. to build a permission centralized control system and combine with configuration file to solve the docking problems between various application systems and control systems.The system achieve unified management of users, permissions, application modules and access control and improve management efficiency and user experience.

scholarly journals Synthesis and Research of Nanocompositions of Oxide Materials Based on Titanium Dioxide for use as Contrast Agents in Optical Coherence Tomography

2021 ◽  
pp. 325-338
Author(s):  
Artem Nikolaevich Kupriyanov ◽  
Diana Evgen’evna Fidarova ◽  
Linda Ruslanovna Makhmudova ◽  
Magomed Rasulovich Gadzhiev ◽  
Shuainat Ruslanovna Nimatulaeva ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Titanium Dioxide ◽  
Contrast Agent ◽  
Contrast Agents ◽  
Elemental Composition ◽  
Zirconium Dioxide ◽  
Titanium Dioxide Nanoparticles ◽  
Optical Coherence ◽  
Oxide Materials ◽  
The Stability

In this paper, the contrasting properties of titanium dioxide nanoparticles in various compositions were considered. In the course of the work, methods for the synthesis of oxide materials SiO2-TiO2, SiO2-ZrO2, TiO2-ZrO2 and SiO2-TiO2-ZrO2 were developed; the microstructure of oxide materials SiO2-TiO2, SiO2-ZrO2, TiO2-ZrO2and SiO2-TiO2-ZrO2was studied; the stability of oxide materials SiO2-TiO2, SiO2-ZrO2, TiO2-ZrO2and SiO2-TiO2-ZrO2 was determined. The elemental composition of the oxide materials SiO2-TiO2, SiO2-ZrO2, TiO2-ZrO2and SiO2-TiO2-ZrO2 has also been studied using SEM and XRD methods. It was found that SiO2-TiO2-ZrO2 nanocomposites with content of titanium dioxide from 8 to 9.5 % and zirconium dioxide from 0.5 to 2 % are completely insoluble in a highly alkaline medium. Thus, this composition is the most optimal for use as a contrast agent in optical coherence tomography.

The Stability of Silane Layers on Titanium Dioxide Electrodes

1984 ◽  
Vol 131 (4) ◽  
pp. 799-803 ◽  
Author(s):  
R. Vithanage ◽  
H. O. Finklea
Keyword(s):  
Titanium Dioxide ◽  
The Stability

Enterprise Application Integration (EAI)

2009 ◽  
pp. 837-843
Author(s):  
Christoph Bussler
Keyword(s):  
Enterprise Application Integration ◽  
Application Integration ◽  
Technology Infrastructure ◽  
Application System ◽  
Enterprise Application ◽  
Application Systems ◽  
Share Data ◽  
Integration Problem ◽  
Business Data ◽  
Definition Of

As long as businesses only have one enterprise application or back end application system there is no need to share data with any other system in the company. All data that has to be managed is contained within one back end application system and its database. However, as businesses grow, more back end application systems find their way into their information technology infrastructure managing different specialized business data, mainly introduced due to the growth. These back end application systems are not independent of each other; in general they contain similar or overlapping business data or are part of business processes. Keeping the data in the various application systems consistent with each other requires their integration so that data can be exchanged or synchronized. The technology that supports the integration of various application systems and their databases is called Enterprise Application Integration (EAI) technology. EAI technology is able to connect to back end application systems in order to retrieve and to insert data. Once connected, EAI technology supports the definition of how extracted data is propagated to back end application systems solving the general integration problem.

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