In order to reduce the pollutants of environment and electromagnetic waves, environment friendly polymer foams with outstanding electromagnetic interference shielding are imminently required. In this paper, a kind of electromagnetic shielding, biodegradable nanocomposite foam was fabricated by blending poly (butylene succinate) (PBS) with carbon nanotubes (CNTs) followed by foaming with supercritical CO 2 . The crystallization temperature and melting temperature of PBS/ CNTs nanocomposites with 4 wt % of CNTs increased remarkably by 6 °C and 3.1 °C compared with that of pure PBS and a double crystal melting peak of various PBS samples appeared in DSC curves. Increasing the CNT content from 0 to 4 wt % leads to an increase of approximately 3 orders of magnitude in storage modulus and nearly 9 orders of magnitude in enhancement of electrical properties. Furthermore, CNTs endowed PBS nanocomposite foam with adjustable electromagnetic interference (EMI) shielding property, giving a specific EMI shielding effectiveness of 28.5 dB cm 3 /g. This study provides a promising methodology for preparing biodegradable, lightweight PBS/CNTs foam with outstanding electromagnetic shielding properties.

Oil/water separation is an important pursuit because of the increasing worldwide oil pollution. The key to solving this problem is to develop high-performance materials and improve their separation efficiency. Polyurethane composite foam (PUCF) possesses large specific surface area, high open porosity, and good mechanical properties which have been developed for oil/water separation. This paper mainly summarizes the research progress of PUCF materials in oil/water separation, including the surface-wetting theory, the intrinsic wetting threshold theory, the main factors affecting the separation performance of foam materials, and the recent research status of the PUCF materials in oil/water separation. Finally, we look forward to the research focus on urgent problems that should be addressed for PUCF in oil/water separation, which will provide new strategies for further developing next-generation high-performance foam materials for oil/water separation.