AI Article Synopsis
- Researchers developed hierarchically porous PLA nonwovens using electrospinning with PEO and water etching.
- The material exhibits a shape memory effect, allowing it to switch between compact and porous surfaces through hot-pressing and hot water recovery.
- This unique property enables rapid release of small molecules, making PLA nonwoven promising for applications like temperature-controlled drug and catalyst delivery.
Article Abstract
In this work, hierarchically porous PLA (polylactic acid) shape memory nonwovens were prepared by electrospinning its blend solution with PEO (polyethylene oxide) and subsequent water etching. Based on shape memory effect resulting from tiny crystals and the amorphous matrix of PLA, the switch between compact and porous surfaces has been achieved cyclical hot-pressing and recovery in a hot water bath. After hot-pressing, the disappearance of hierarchical pores contributes to compact surface, enabling embedding of the target molecule in PLA nonwoven (, CLOSE state). Upon exposure to heat, PLA nonwoven recovers to its permanent shape and exhibits a porous surface, providing a penetrative diffusion pathway for small molecules (, OPEN state). The hierarchically porous structure and shape memory effect endow PLA nonwoven with the capability of rapid release. Our results provide a good candidate for some potential applications, such as temperature-controlled quick-release of catalysts and drugs.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10875605 | PMC |
| http://dx.doi.org/10.1039/d3ra08411f | DOI Listing |
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