Can I use the Maglev train when travelling from PuDong airport to Hangzhou?

Yes, it is available, but you have to transfer on the way. Take Maglev from the airport to Longyang Road, where transfer to Shanghai subway line 2 to Hongqiao Railway Station, where there are high-speed trains to HZ.

Actually, the best way for your trip should be the direct bus between PVG and your destination. If you are really interested in Maglev, you can experience that for round trip to PVG to catch the direct bus then.