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Using polydimethylsiloxane (PDMS) to modify waterborne polyurethane (WPU) has proved to be an effective and feasible way to improve some key properties of WPU.

The synthesis of 9‐fluorenone derivatives has been achieved in high yield and with high purity by aerobic oxidation of 9H‐fluorenes at room temperature in the presence of a graphene‐supported KOH composite that acts as a catalyst in N,N‐dimethylformamide. The new protocol involves very simple work‐up procedures, and the solvent and the catalyst can be recycled and reused. A scaled‐up preparative study employing this method was also conducted and showed its advantages of being both cost‐effective and environmentally friendly, and has potential for application in industrial processes.

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