Can biodegradable polymers live up to the hype?

polymer
Credit: Pixabay/CC0 Public Domain

As consumers and corporations alike become more environmentally conscious, the chemical industry is working to find solutions to the plastic waste crisis. One idea is to use biodegradable polymers known as polyhydroxyalkanoates (PHA) as replacements for traditional plastic packaging and other materials. A feature article in Chemical & Engineering News, the weekly newsmagazine of the American Chemical Society, explores the possibilities and pitfalls of PHA.

PHA is not a new human invention; this class of polymers can be found in nature and is used to store cellular energy, writes Senior Editor Alex Tullo. Commercially, it is manufactured through the industrial fermentation of sugars or lipids. As cities around the world ban single-use products, such as straws and bags, companies are working to commercialize PHA as a viable alternative. The main selling point is rapid biodegradability in a variety of environments. Demand has increased for PHA in recent years, with several companies opening or planning commercial plants in the U.S. and beyond. In addition, major food and beverage brands are planning to switch their packaging to PHA-based materials soon.

Despite its much-touted promise, there's reason to believe PHA might be too good to be true. Several companies have tried and failed to bring it to market in recent years, and PHA is much more expensive than its traditional plastic counterparts. Beyond that, some experts have published findings saying the biodegradability of PHA is overstated, and that the rapid degradation time is based on optimized laboratory conditions rather than real-world ones. However, PHA's boosters say that it's still a better alternative to non-biodegradable plastics, and that the industry may be on the cusp of a breakthrough.


Explore further

New material inspired by spider silk could help solve our plastic problem

More information: Article link: cen.acs.org/business/biobased- … nally-deliver/99/i22
Citation: Can biodegradable polymers live up to the hype? (2021, June 16) retrieved 30 July 2021 from https://phys.org/news/2021-06-biodegradable-polymers-hype.html
This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only.
6 shares

Feedback to editors

User comments