1. Synthesis of Water-Dispersible Poly(dimethylsiloxane) and Its Potential Application in the Paper Coating Industry as an Alternative for PFAS-Coated Paper and Single-Use Plastics.
- Author
-
Hamdani, Syeda Shamila, Elkholy, Hazem M., Alford, Alexandra, Jackson, Kang, Naveed, Muhammad, Wyman, Ian, Wang, Yun, Li, Kecheng, Haider, Syed W., and Rabnawaz, Muhammad
- Subjects
- *
SINGLE-use plastics , *PAPER industry , *KRAFT paper , *COATINGS industry , *PAPER recycling , *PLASTIC marine debris , *FLUOROALKYL compounds , *BIODEGRADABLE plastics - Abstract
Polyethylene-, polyvinylidene chloride-, and per- and polyfluoroalkyl substance-coated paper generate microplastics or fluorochemicals in the environment. Here, we report an approach for the development of oil-resistant papers using an environmentally friendly, fluorine-free, water-dispersible poly(dimethylsiloxane) (PDMS) coating on kraft paper. Carboxylic-functionalized PDMS (PDMS-COOH) was synthesized and subsequently neutralized with ammonium bicarbonate to obtain a waterborne emulsion, which was then coated onto kraft paper. The water resistance of the coated paper was determined via Cobb60 measurements. The Cobb60 value was reduced to 2.70 ± 0.14 g/m2 as compared to 87.6 ± 5.1 g/m2 for uncoated paper, suggesting a remarkable improvement in water resistance. Similarly, oil resistance was found to be 12/12 on the kit test scale versus 0/12 for uncoated paper. In addition, the coated paper retained 70–90% of its inherent mechanical properties, and more importantly, the coated paper was recycled via pulp recovery using a standard protocol with a 91.1% yield. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF