Possibly, but I doubt they have incentive to do it. Not that I agree with it, but construction projects are focused on being as cheap and simple as possible.

My guess would be prohibitive costs. Nano plastics are tiiiinnnnyyyy, as such they are incredibly difficult to capture. Additionally, there's probably very little incentive to even try.

I didn't mean to come across as underestimating the severity of that issue, however I don't see this as being anywhere near a major contributor. If we are going to start taking micro plastic pollution seriously, there are hundreds of worse offenders to tackle before we reach this industry

I've never thought about that, pretty interesting stuff. If I had to guess, I would say the overall pollution of pipe repair with this method is still less than the pollution of dredging up an entire city block to replace the sewer pipes, not to mention the added cost of the latter. However, more data is almost never a bad thing, and I'm glad someone is doing this research.