AI Article Synopsis
- Latex paint consists of tiny polymer particles suspended in water that can create a film, either alone or with rigid particles like silica.
- We designed a device to measure both the drying rate and stress during the film formation process of latex coatings, and applied this to a silica-latex mixture.
- Our findings showed a link between the drying rate, latex particle thickness, and silica content, indicating that temperature affects drying initially, but silica content takes over as drying progresses.
Article Abstract
Latex paint is an aqueous dispersion of nano-sized polymer particles that can form a thin film by itself or mixed with rigid particles. We have developed an apparatus that can simultaneously measure drying rate and stress generation and have investigated the film formation process of a latex-only coating layer under convection drying. In the present study, we adopted the same method to investigate the film formation process of the silica-latex coating layer. As a result, we were able to systematically correlate the drying rate change by the equivalent thickness of latex particles accumulated with silica particles at the drying surface. Furthermore, it is unveiled that the drying rate in the former stage depends on drying temperature, while the drying rate changed to be dominated by silica content after the particle-packing layer was formed over the entire coating layer. On the other hand, the model we proposed for stress generation, considering the temperature effect on latex deformability, was found to be applicable to the present experimental system by replacing a portion of deformable particles with rigid particles.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11224093 | PMC |
| http://dx.doi.org/10.1140/epje/s10189-024-00432-9 | DOI Listing |
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