Enzymes can now be armored to survive the extreme 210-degree heat of plastic manufacturing so they can eat the plastic from the inside out later.
Biodegradable plastics often fail to break down because they require very specific industrial compost conditions. A new stabilization method uses a citric acid matrix to protect plastic-eating enzymes from being destroyed during factory melting. These armored enzymes remain dormant inside the finished product like a self-destruct timer. When the plastic is eventually thrown away, the enzymes activate and dissolve the material back into harmless components. This technology allows for truly compostable plastics that can be made using existing industrial machinery.
Process-Compatible Immobilization of Thermolabile Enzymes for Self-Degradable Polyesters via Industrial Melt Compounding above 170 °C
SSRN · 6726140
Integrating thermolabile enzymes into industrial melt processing remains a key challenge for achieving programmable self-degradable plastics. Here, we demonstrate a process-compatible stabilization strategy for bio-based polyesters using immobilized Alcalase. Two approaches were compared: adsorption onto zeolite (Z-En) and entrapment within a citric acid–crosslinked carboxymethyl cellulose matrix (C-En-CA). PLA masterbatches containing 10 wt % C-En-CA retained catalytic functionality after twin-