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ACS Applied Materials & Interfaces

ACS Applied Materials & Interfaces

IF: 8.3
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A Self-Healing Transparent Waterborne Polyurethane Film with High Strength and Toughness Based on Cation? π Interactions

Published:12 December 2024 DOI: 10.1021/acsami.4c18429
Zhuoting Xiang, Yanan Zhang, Xun Lu

Abstract

Giving waterborne polyurethane (WPU) coatings self-healing properties not only maintains the coating’s environmentally friendly characteristics but also extends the material’s service life and enables sustainable development. Therefore, self-healing WPUs have received an increasing amount of attention from researchers. However, it is a serious challenge to overcome the original shortcomings of WPU coatings, such as poor strength, low hardness, and weak adhesion, as well as the introduction of self-healing properties resulting in further degradation of strength-mechanical properties and heat resistance. Here, we provide a design strategy to introduce a noncovalent physical cross-linking network based on cation?π interactions into the WPU molecular structure to prepare a series of self-healing transparent WPU coatings with high strength. The coating exhibited a very high tensile strength (66.11 ± 3.28 MPa) and excellent flexibility (0.5 mm), with a scratch repair efficiency of up to 98.2% for 12 h of repair at 60 °C. In addition, the coating also has good optical properties and has broad application prospects in the fields of transparent protective coatings and adhesives.

Substances (7)

Materials
Procduct Name CAS Molecular Formula Supplier Price
Potassium Acetate 127-08-2 C2H3KO2 718 suppliers $6.00-$1881.00
Calcium acetate 62-54-4 C4H6CaO4 492 suppliers $5.00-$650.00
Potassium fluoride 7789-23-3 FK 446 suppliers $12.50-$7950.00
Potassium formate 590-29-4 CHKO2 422 suppliers $6.00-$456.00
Lithium acetate 546-89-4 C2H3LiO2 351 suppliers $6.00-$808.96
Magnesium acetate 142-72-3 C4H6MgO4 280 suppliers $10.00-$688.00
CESIUM ACETATE 3396-11-0 C2H3CsO2 241 suppliers $6.00-$716.80

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