Energising Electrostatic Charge Into Nylon Ribbons? Is it possible?
Won't work with Nylon: you need a conductor to be able to move/remove charges from it.

But, that's actually commonly done: in powder coating (to protect metal surfaces), you connect the conducting piece you want to coat to a high voltage source. The other end, you'd bring to about earth potential.

As soon as you don't need the attractive force anymore, you'd disable the high-voltage source and discharge your conductive objects to earth.

Note that your ribbons don't need to be good conductors, just so-and-so conductors; so any fabric that has undergone some metallization or contains carbon fibers or wiring will do.

The real problem is: your pollen isn't deterministically charged. That way, it'll be hard to attract it to the conductive surfaces. In powder coating, this is solved by the "gun" that sprays the powder being oppositely charged to the target.