Patent ID: 11958035
Assignee: KING FAISAL UNIVERSITY
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A process for preparing a microporous thin film from a plastic waste stream, the process comprising:
collecting a plastic waste stream;
shredding plastic in the plastic waste stream into pieces, thereby obtaining shredded plastic;
rolling and mixing the shredded plastic in water to obtain a mixture;
separating polyolefins from other plastics in the mixture using a float-sink method to obtain separated polyolefins;
dissolving the separated polyolefins in an organic solvent to obtain a solution;
adding a cavity forming agent to the solution until the cavity forming agent is well-dispersed therein;
applying the solution onto a solid substrate through spin-coating to obtain a substrate coated with a thin film;
subjecting the thin film to heat thereby strengthening the thin film;
peeling the thin film off the substrate to obtain a peeled thin film; and
extracting the cavity forming agent from the peeled thin film by dissolving the peeled thin film in a suitable solvent, thereby obtaining a microporous thin film with macro-voids and cavities.