A review of past and present published works examining the interaction of polymeric dispersants with titania pigment particles is presented. Titania is the most important white pigments currently used in the world and its suspension properties are very important for consumer industries such as paints, papermaking and plastics; if aggregates are present, the end-use properties including gloss, opacity and storage stability will be highly affected. As polymeric dispersants are generally used to disperse titania pigment particles, it is very important to understand the interactions between the pigment particles and polymeric dispersants of varying functionality. Although, in principle, the adsorption of polymers onto titania pigment and influences on pigment dispersion and stabilisation are fairly known, it is nevertheless hardly possible to forecast the behaviour of a given polymeric dispersant in advance, unless to have a broad knowledge of the interaction occurring between pigment and dispersants and effect of dispersant structure upon adsorption. While only titania pigment is discussed, the issues raised may also apply to other mineral oxides such as alumina or zirconia.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.cis.2009.07.004 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Beyond White as a Neutral Color.
Stud Health Technol Inform
November 2024
School of Civil Engineering, University of Leeds, UK.
Article Synopsis
- This discussion paper examines the rise of white surfaces in healthcare design, highlighting the historical, sociopolitical, and environmental implications, including the ecological degradation caused by mining for white pigments.
- It critiques the dominance of neutral color palettes in design, linking it to a rejection of colorful local traditions and questioning the latent racism associated with the preference for white, rooted in 20th-century modernism.
- The paper calls for a more inclusive approach to color in healthcare spaces that considers diverse cultural sensitivities and experiences, while also encouraging designers to rethink their aesthetic choices beyond a purely white aesthetic.
Elucidating the phytotoxic endpoints of sub-chronic exposure to titanium dioxide nanoparticles in Endemic Persian Dracocephalum species.
Chemosphere
December 2024
Department of Chemistry and Biochemistry, University of Texas at El Paso, Texas, USA; Environmental Science and Engineering Program, University of Texas at El Paso, Texas, USA.
Article Synopsis
- This study explored the effects of titanium dioxide nanoparticles (TiONPs) on Persian dragonhead plants grown hydroponically, focusing on varying concentrations from 0 to 2500 ppm over 21 days.
- At 50 ppm TiONPs, the plants showed significant growth, with a 26.2% increase in shoot biomass and an 18.2% rise in height, while higher concentrations like 100 ppm negatively impacted key components such as carotenoids and chlorophyll.
- The research indicated that low doses of TiONPs can enhance growth, while higher doses result in physiological stress and activate the plant's defense systems, suggesting 50 ppm as the optimal concentration for improved agricultural yields.
Susceptibility of Human Spermatozoa to Titanium Dioxide Nanoparticles: Evaluation of DNA Damage and Biomarkers.
Life (Basel)
November 2024
Department of Biological, Geological and Environmental Sciences, University of Catania, 95124 Catania, Italy.
Nowadays, developing countries have seen a reduction in male reproductive parameters, and it has been linked to the exposure of endocrine disrupting chemicals (EDCs), which are able to mimic or disrupt steroid hormone actions. Also, nanoparticles have shown effects on the male reproductive system, in particular the use of TiO-NPs in drugs, cosmetics, and food as pigment additives, and, thanks to their small size (1-100 nm), provide themselves the opportunity to be internalized by the body and pass the blood-testis barrier (BTB). Therefore, TiO-NPs can act on spermatogenesis and spermatozoa.
View Article and Find Full Text PDFControlling TiO photocatalytic behaviour perhydropolysilazane-derived SiO ultrathin shell.
Nanoscale
December 2024
Materials Architecturing Research Centre, Korea Institute of Science and Technology, 5 Hwarang-ro 14-gil, Seoul 02792, Republic of Korea.
This study addresses the inherent photocatalytic activity of pure titanium dioxide (TiO), which limits its application as an industrial pigment. To mitigate this issue, a core-shell structure was employed, where TiO cores were encapsulated within SiO shells. Perhydropolysilazane (PHPS) was introduced as a superior SiO precursor over tetraethylorthosilicate (TEOS), resulting in thinner and more uniform SiO shells.
View Article and Find Full Text PDFArticle Synopsis
- Iron oxides, antioxidants, and pigmentary titanium dioxide are effective sunscreen additives that protect against visible light and related skin issues; however, there are no consistent recommendations on their use.
- A survey of 974 dermatology practitioners revealed that 91.68% provide advice on visible light protection, mainly focusing on pigmentation issues for patients with darker skin tones, but only a small percentage specifically recommend protective sunscreens for these patients.
- The study highlights the need for more education on visible light protection and calls for standardized guidelines and a wider variety of suitable sunscreen products to better serve patients' needs.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!