Thermoplastic elastomer foams with gas-rich structures occupy a high specific surface/volume ratio, which will take up lots of space for storage and transportation. Herein, micro-crosslinked olefin block copolymers (OBC) foams with shrinkable and recoverable functions were prepared via supercritical CO₂ foaming to subtly solve the storage problem, and the shrinkage and recovery mechanisms were studied. The storage volume of OBC foams could shrink up to ∼78.5 % and maintain low volume condition for a long time through vacuum sealing technology. Meanwhile, the shrunk OBC foams could also be quickly and fully recovered by N₂-assisted post-processing because of the regulation of gas exchange. And OBC foams with a density of 0.028 g/cm³ were prepared successfully. The compressive properties of OBC foams were investigated. Related design strategies can significantly reduce the transportation costs and energy consumption of OBC foams and are expected to be applied to other thermoplastic elastomers.

具有富气结构的热塑性弹性体泡沫占据较高的比表面积/体积比，这将占用大量存储和运输空间。_{在此，通过超临界CO 2}发泡制备具有可收缩和可恢复功能的微交联烯烃嵌段共聚物（OBC）泡沫，以巧妙地解决存储问题，并研究了收缩和恢复机制。通过真空密封技术，OBC 泡沫的存储体积可收缩至 78.5% 并长时间保持低体积状态。同时，由于气体交换的调节，收缩的OBC泡沫也可以通过N ₂辅助的后处理快速且完全地恢复。以及密度为0.028 g/cm ^{3的OBC泡沫}准备成功。研究了 OBC 泡沫的压缩性能。相关设计策略可显着降低OBC泡沫的运输成本和能源消耗，有望应用于其他热塑性弹性体。