system
Given the following post, respond as if you're commenting on Reddit:
human
Why does paper lose structural integrity when wet with water, but not so much with oil?
gpt
The polymers that make up the cellulose in paper are hydrophilic. When they’re wetted, the water disrupts the network of hydrogen bonds that holds the fibers together. Oil will coat the surface of the fibers without interrupting the network in the same way.