I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

Comment

Transforming plastic waste into useful aerogels

By Paul Grad |

Plastic-bottle waste is toxic and non-biodegradable, and has become a major environmental issue. It often ends up in the oceans, affecting marine life, or in landfills, contaminating groundwater and affecting land use. Now a team led by professors Nhan Phan-Thien and Hai Minh Duong, from the National University of Singapore (Singapore; www.nus.edu.sg), has developed recycled polyethylene tetraphthalate (rPET) silica aerogels using rPET fibers obtained from plastic bottle waste via sol-gel and ambient-pressure drying methods. The team prepared the rPET aerogels through a direct gelation of silica onto PET. rPET fibers are treated with dichloromethane to partially dissolve the fibers. The fibers were then dipped and allowed to swell in a mixture of tetraethoxysilane (TEOS) and ethanol, with the pH controlled to 2.5 using HCl to promote hydrolysis. After acid hydrolysis, the pH was controlled to 7 with an ammonium hydroxide solution to promote condensation. New aerogel materials containing recycled plastics have properties such as lightness, softness and flexibilityNew aerogel materials containing recycled plastics have properties such as lightness, softness and flexibilithhhvfhjyutkjj, making them suitable for many industrial applications,…
Related Content

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat